npcil proprietary this document contains confidential ......f) preparation of graphical layouts...

of 68

NPCIL PROPRIETARY

This document contains confidential and protected information and that the same are the intellectual property of Nuclear Power Corporation of India Limited (NPCIL). No part of this document including notably any editorial elements, verbal and figurative marks and images included herein, shall be reproduced or transmitted or utilized or published or stored in any form or by any means now known or hereinafter invented, electronic, digital or mechanical, including photocopying, scanning, recording or by any information storage or retrieval system, without prior written permission from NPCIL, by any person or entity. Unauthorized use, disclosure or copying is strictly prohibited and may constitute unlawful act and can attract legal action.

of 68

TECHNICAL SPECIFICATION FOR UPGRADATION OF PAGE NO. :

FIRE ALARM SYSTEM OF REV. NO. 0

KAKRAPARA ATOMIC POWER STATION-1&2

TABLE OF CONTENTS

Section Title Page No 1 Introduction 4 1.1 Purpose 4 1.2 Scope 4

1.3 Definitions, Abbreviations and Notations 5 1.4 References and Applicable Documents 8

1.4.1 Applicable standards & NPCIL specifications 8 1.4.2 Approvals 8 1.4.3 Applicable Drawings 8 1.5 Overview 8 2 General Description 9 2.1 Role of the System/Brief Overview of the Existing System 9 2.1.1 Role of the system 9 2.1.2 Brief Overview of the System 9 2.1.3 Proposed FAS Equipment 10 Fig.2 Schematic diagram of detector cabling scheme 12 3 Requirements 13 3.1 Interface with Field Inputs/Outputs 13 3.1.1 Fire Detectors & Accessories 13 3.1.2 Input signal Processing 18 3.1.3 Output 19 3.2 Interface with Central Clock System 20 3.3 Functional Requirements 20 3.4 Functional Requirements under various Modes 23

3.5.1 to 3 Human Computer Interface Requirements & repeater panel 23 3.5.4 Miscellaneous items 27 3.6 Performance Requirements 30 3.7 Safety Requirements 30 3.8 Fault Tolerance Requirements 31 3.9 Security Requirements 31 3.10 Self-Diagnostics Requirements 31 3.11 On-line Testability Requirements 31 3.12 Off-line Testability Requirements 32 3.13 Reliability Requirements 32 3.14 Availability Requirements 32

3.15 Maintainability Requirements 32 3.16 Typical System Architecture 33 3.17 General Requirements 33 3.17.1 Power supply requirements & effect of power failure 33 3.17.2 Environmental & Operating Conditions 35 3.17.3 Installation Requirements 37 3.17.4 Physical & Layout requirements 37 3.17.5 Cable laying & cable entry requirements 38

of 68

Section TITLE Page No

3.17.6 Termination Requirements 38 3.17.7 Mounting & Anchoring Requirements 39 3.17.8 Grounding Requirements 39 3.17.9 Identification /Packaging requirements 39 3.17.10 Insulation Requirements 40 3.17.11 Painting Requirements 40 3.18 Test Requirements 40 3.18.1 Climatic Tests 40 3.18.2 Seismic Test and EMI/RFI Tests 42 3.18.3 Tests at vendor’s premises 43 3.18.4 Tests at site 44 3.18.5 Tests Report Requirement 44

3.18.6 QA Requirements 45 3.18.6.A V & V requirement 45 3.18.7 Installation & Commissioning Requirements 46 3.18.8 Acceptance Criterion 49 3.19 Training Requirements 50 3.20 Documentation Requirements 50

3.21 Spares requirement 51 3.22 Services 51 3.23 Packing & shipping 52 3.24 Guarantee 52 Annexure-1(table-1)

Supply item 53

Annexure-2 Erection, testing ,pre commissioning & commissioning 55 Annexure-3 Technical data to be furnished with proposal 56 Annexure-4 Sample QAP 58

of 68

1.0 INTRODUCTION 1.1 Purpose

The purpose of this document is to specify the requirements for design, engineering, manufacture, testing, delivery to site, installation, commissioning, testing at site, documentation and guarantee of Fire Alarm System (FAS) for Kakrapar Atomic Power Station-1&2.

1.2 Scope

This document serves as the basis for carrying out the following:

a) Preparation of drawings like GA, BM, schematic diagrams, wiring diagrams & nameplate details etc.

b) Procurement of various components, modules & panels. c) Procurement of cards and fabrication of panels. d) Procurement of associated peripherals, cables, glands, conduits and its accessories. e) Mounting and wiring of PCBs and other associated sub modules and panels. f) Preparation of graphical layouts based on diagrams provided by NPCIL. g) Inspection and tests to meet the requirements of NPCIL set forth in this

specification. h) Supply of test equipment. i) Supply of 10 % of PCBs, Modules and peripherals etc. as spares. j) Field wiring & mounting of 4 way GI boxes/ for mounting detectors, zone

monitoring unit for interfacing conventional fire detectors and other field modules, accessories including address setting, if required.

k) Termination of Panel cables and other field modules. l) Carry out modifications in the system matching with final drawings & ECNs if

any at site. m) Training to site personnel on Installation, commissioning, maintenance and

operational aspects. n) Installation and Commissioning of the system at site o) Support post commissioning for at least 2 years.

It is expected that vendor shall meet all the requirements given in this specification. In case of any difference between requirements given in this specification and the specification of the equipment offered by the bidder, the same must be clearly indicated in the bid.

of 68

1.3 Definitions, Abbreviations and Notations Channel (Instrumentation) An arrangement of interconnected components within a system that initiates output(s). Common Cause Failure The failure of a number of devices or components to perform their functions, as a result of a single specific event or cause. Diversity The presence of two or more different components or systems to perform an identified function, where the different components or systems have different attributes, so as to reduce the possibility of common cause failure. Fail Safe Design A concept in which, if a system or a component fails, then plant/component/system will pass into a safe state without the requirement to initiate any operator action. Functional Isolation Prevention of influences from the mode of operation or failure of one circuit or system on another. Independence The ability of equipment, channel or a system to perform its function irrespective of the normal or abnormal functioning of any other equipment, channel or system. Independence is achieved by functional isolation and physical separation. Physical Separation A means of ensuring independence of equipment through separation by geometry (distance, orientation etc.), appropriate barriers or a combination of both. Redundancy Provision of alternative structures, systems, components of identical attributes, so that anyone can perform the required function, regardless of the state of operation or failure of the other. Reliability The probability that a structure, system, component or facility will perform its intended (specified) function satisfactorily for a specified period under specified conditions. Quality Assurance Planned and systematic actions necessary to provide adequate confidence that an item or a facility will perform satisfactorily in service as per design specifications. Software Quality

of 68

The composite characteristics of software that determine the degree to which the software in use will meet the expectations of the user. Single Failure A random failure, which results in the loss of capability of a component to perform its intended safety function. Consequential failures resulting from a single random occurrence are considered to be part of the single failure.

Type Test

Tests carried out on one or more sample equipment to verify adequacy of design and manufacturing process

Abbreviation: A Ampere AC Alternating Current AERB Atomic Energy Regulatory Board AFNOR Association Fracaise De Normalisation France AVT Alarm Verification Time BASEEFA British Approval Services for Electrical Equipment in Flammable

Atmosphere BD Beam Detector BOQ Bill of Quantity BS British Standard C & I Control & Instrumentation CI Configuration Item CKT Circuit CMP Configuration Management Plan CPU Central Processing Unit CRS Cold Rolled Steel DC Direct Current DS PC based Display Station ECN Engineering Change Notice EMI Electro Magnetic Interference/ Compatibility En European norms EPR Ethylene Propylene Rubber EPROM Erasable Programmable Read Only Memory ETP Equipment Test Procedure FAS Fire Alarm System FD Flame Detector GA General Arrangement GI Galvanized Iron HD Hardware design I/O Input/ Output I/P Input IC Integrated Circuit IEC International Electro Technical Commission IEEE Institute of Electrical and Electronic Engineers IQC Internal Quality Control

of 68

IR Insulation Resistance IS Indian Standard LCD Liquid Crystal Display LED Light Emitting Diode LPCB Loss Prevention Council Of Great Britain MCB Miniaturized Circuit Breaker MCCB Moulded Case Circuit Breaker MCP Manual Call Point MCR Main Control Room MIL Military MS Mild Steel MTBF Mean Time Between Failures MTTR Mean Time To Repair NPCIL Nuclear Power Corporation Of India Limited O&M Operation And Maintenance PB Push Button PC Personal Computer PCB Printed Circuit Board PDS Pre-Developed System QAP Quality Assurance Plan RAM Random Access Memory RFI Radio Frequency Interference RH Relative Humidity RRI Repeat Response Indicator S Safety SAD System Architectural design SCR Supplementary Control Room SD Smoke Detector SD(O) Smoke Detector (Optical) SG Safety Guide SR Safety Related SSE Safe Shutdown Earthquake TD Thermal Detector V Volt VdS Verband der Sachversicherer, Germany. VLSI Very Large Scale Integration V & V Verification and validation WD Wiring Diagram ZMU Zone Monitoring Unit

of 68

1.4 References and Applicable Documents 1.4.1 Applicable standards& NPCIL specifications

The following standards are to be followed in conjunction with this specification. However, in view of the large number of designs existing for FAS, suppliers not complying with the following standards and/or the design requirements given elsewhere in this specification may send quotation specifying clearly which of the design requirements/standards specified are not complied. However, such bids will be accepted only if the systems offered meet minimum functional requirements as decided by the purchaser and conform to reliability and availability standards specified elsewhere in this document.

1. AERB standard No. AERB/S/IRSD-1for Fire Protection of Nuclear Power Plants.

2. AERB Safety Guide No. AERB/SG/D-1 for Safety Classification & Seismic

categorization for Structures, Systems, & Components of Pressurized Heavy Water Reactors.

3. AERB Safety Guide No. AERB/SG/D-4 for fire protection in Pressurised Heavy Water Reactor based nuclear power plants.

4. AERB Safety Guide No. AERB/SG/D-25 for computer based systems of Pressurized Heavy Water Reactors.

Note: In the event that certain requirements of the above specifications conflict with the

requirements of this specification, the latter shall govern.

The specification / data sheets of all major items, including the bought out items, required for the system shall be submitted by the supplier with his offer and on acceptance of the same by the Purchaser, they shall form part of requirements of this specification.

1.4.2 Approvals

The Fire Alarm Units (FAUs), detectors and field modules of the system shall be approved by, at least, one of the following reputed organizations as complying with respective En/ISO standards:

1. VdS- Verband der Sachversicherer, Germany. 2. AFNOR- Association Francaise De Normalisation France. 3. L.P.C.B. - Loss Prevention Council, Great Britain.

Intrinsic safe equipment shall be approved by, BASEEFA-British Approvals Service for Electrical Equipment inflammable Atmosphere, U.K. or equivalent as complying to respective En/ISO standards

The certificates for the same shall be furnished.

1.4.3 Applicable Drawings

The applicable drawings of FAS will be submitted to the successful bidder. It is the responsibility of the supplier to work out the complete design and prepare detailed drawings pertaining to fabrication, engineering and installation.

1.5 Overview

Section 1 covers introduction, Section 2 covers general description with help of context

of 68

diagram of the system and Section 3 covers details of various requirements. 2.0 GENERAL DESCRIPTION 2.1 Role of the System/Brief Overview of the existi ng System 2.1.1 Role of the System

The fire alarm is provided to detect fire even in its incipient stages, in the fire prone areas of the plant and to give an audio visual annunciation in the plant control centre for the same with quick and exact identification of the fire location. It also provides potential free output relay contacts for tripping of ventilation system fans / dampers/air handling units on detection of fire in the specific areas for effective fire control.

Context diagram of FAS is given below.

2.1.2 Brief Overview of the existing System

The existing analogue addressable Fire Alarm system, which is common for both the units, comprises of 3 Nos independent and standalone Fire Alarm Panels. Each of Panel-1, Panel-2 & 3 has 7 addressable loops and 5 non-addressable loops.

Analogue addressable fire detectors Ionization and Optical detectors, thermal, manual call point and other makes of conventional fire detectors such as flame detectors, beam detectors & LHS cable are used. Analogue Addressable type Fire detectors stated above located in various rooms in the plant are connected addressable loops in a control panel in a class-A type of wiring (i.e. Ring Main). Dedicated cables have been laid up to conventional (Group addressable) type of detectors to connect them in class-B type of wiring with non-addressable loops having supervisory end of line resistor (ELOR). The control panels are located at the Control Equipment Room (CER) of KAPS-1 adjacent to Main Control Room (MCR).

In view of the obsolescence of the FAS control panels and fire detectors, one of the three panels is required to be replaced, by up gradation without changing the existing cables laid for the detectors. In order to facilitate connection of conventional detectors, zone monitoring unit will be required. This specification covers the requirement of FAS control panel, detectors, zone monitoring unit

of 68

other interface modules, cables and conduits. 2.1.3 Proposed FAS Equipment

Intelligent fire detectors located in various rooms in the plant are connected to a control panel. A detector determines whether a fire condition exists in the area, where it is located and conveys the status as fire/ normal to the control panel. The status given out by each detector is displayed at the control panel. In case, a fire condition is detected, the control panel generates an audio-visual fire alarm at the MCR and at the FAS control panel. Fire event is also annunciated in the fire station. Fire event and its location are also displayed on the repeater panel in the Supplementary control room (SCR). The control panel also displays the description of the location where fire has been detected and actuates a user output relay whose contacts are used in the ventilation system logic for tripping of fans/AHU/dampers for a fire in a specific area. The control panel is also connected to a PC-based OIC which is located near the FAS control panels. At the OIC, various types of Colour graphic displays are produced automatically (event driven) or on demand. With the help of these displays, operator can quickly identify the locations of detectors giving fire alarm. The floor graphic display shows the area, so that operator can assess the effect of fire in that area and accordingly take the appropriate action.

The fire alarm system shall have FAS control panel including relays (for tripping AHU /closing damper/ alarming in main control room & generate common alarm hooter. The block diagram of FAS is shown in figure1. 240 V AC supply from two sources will be provided as input power supply to the control panel. The control panel shall have the necessary AC-DC converters. The control panels shall have dual redundant AC Power Supply units (AC-DC converters) capable of accepting AC input of 240 V ±10%, 50 Hz AC. The supplier shall confirm the rating of the required DC Power supply unit for the operation of the system. 240 V single phase AC supply will also be made available to the PC based display station. The panel shall consist of 19-inch electronic cabinet of size 2200(H) x 900(D) x 800(W) mm. The cabinet shall have front and back doors with key lock facilities.

The FAS equipment shall be designed with standard bins/modules to facilitate easy maintenance and system expansion. The FAS control panel shall consist of one or more Fire Alarm Units (FAUs) having capacity up to 10 addressable loops configured with redundant controller (CPU), compatible to interface conventional, addressable & intelligent detectors. FAS control panel shall have capacity to cater to 10 addressable loops. These controllers shall operate in Peer-to-Peer network or Master-Slave mode of operation to make integrated system. The integrated system shall have common alarm reporting, cause-and-effect functionality and control. It shall also provision to interface with the Display Station. FAS contact generation shall have necessary relay interface Modules/ cards for interposing with user output consisting of 72 relays, with each relay having four form ‘C’ contact outputs.

For repeat indication of Fire Alarm events at SCR wall /column mountable networked Repeater panels will be required. It shall be possible to connect these repeater panel to FAS control in redundant serial link such that failure any of control panel shall not lead to complete loss information on repeater panel from other healthy control panel.

Fire Alarm System equipment shall consist of the fo llowing:- i. Fire Alarm Control panel comprising of Fire Alarm Units (FAUs) ii. Intelligent fire detectors iii. Conventional (Group addressable) detectors and field modules

of 68

iv. PC based Display Station (OIC) v. Accessories vi. Repeater Panel vii. Sounders. viii. Six point Annunciator at Fire station.

of 68

3.0 REQUIREMENTS 3.1 Interface with Field Input/Outputs (I/O)

Control panel shall have a capacity of minimum 2 addressable loops ( and expandable upto minimum 10 loops) for interfacing with fire detectors. Each loop card/ module shall be designed to handle, at least 250 detectors/devices . For total requirement no. of loops and modules refer TABLE-1.

The maximum loop resistance / maximum loop length for size of cable used for detector loop shall be specified. The fire alarm control panel gets its input from fire detectors which are part of fire alarm system. It also provides audio visual annunciation in Main Annunciation System (MAS) and potential free output relay contacts for tripping of ventilation system fans/dampers/air handling units.

3.1.1 Fire detectors & accessories

It shall be possible to connect the following types of fire detectors to the fire alarm control panels:

i. Multi-criteria smoke detectors (intelligent type) ii. Photo electric type / optical type smoke detectors (intelligent type) iii. Infrared flame detectors (can be conventional or intelligent type) iv. Thermal detectors (intelligent type) v. Beam type smoke detectors (can be conventional or intelligent type)

vi. Duct mounted type housing for intelligent type smoke detectors vii. Intrinsically safe type smoke detectors (can be conventional or intelligent type) viii. Manual call points (intelligent type)

ix. Conventional optical detectors for high gamma radiation areas. 3.1.1.2. General Requirements of Detectors

i) Majority of the fire detectors that will be used shall be of intelligent type i.e. these detectors shall have all the necessary data and software in t hem to decide the fire condition on their own. Each sensor in an intelligent system shall hav e an inbuilt microprocessor with unique software. These fire detectors shall have th e inbuilt ability to discriminate between transient non-fire conditions and a genuine fire st ate. However, intrinsically safe type smoke detectors, beam & Flame detectors can be conventional (group addressable) type. Analog Addressable type detectors as compared to intelligent type do not have the software of fire detection loaded in them. Instead they send the data about smoke density / temperature as the case may be to the control panel. The control panel analyses this data with the software & set for the detector to annunciate an alarm/fault indication. Bidders shall clearly understand this requirement and shall not offer analog addressable detectors as intelligent detectors. Conventional/group addressable types of smoke detectors will be used in high gamma radiation areas of the plant.

ii) The circuit used in the detectors shall be of solid state. The circuit shall have resistance to humidity, corrosion, dust and dirt.

iii) The circuit used in the detectors shall be protected against usual electrical transients, electromagnetic interference (EMI & RFI) and static electricity.

iv) Reverse polarity or fault in the field wiring shall not damage the detector. v) The intelligent detectors and the zone monitoring unit shall be equipped with built an

isolation feature such as short circuit isolator/ fault isolator. vi) Moving parts, which may wear and tear, shall be avoided. vii) The visual (alarm) response of a detector (by an LED) shall be clearly visible from

of 68

the outside by a steady/ flashing light of sufficient brightness. viii) The alarm indication shall be repeatable to a repeat response indicator through a

simple 2-wire connection. ix) The detector shall be designed for fast and simple cleaning method in lab or on site

without need of specialized tools. x) The detector shall be suitable for connection to the control panel via a fully

supervised two-wire circuit (class B wiring) or a two-wire loop circuit (class A wiring). Both methods shall be possible.

xi) The fire detectors except beam detectors & flame detectors shall be plug-in types. The detector base shall be mechanically and electrically identical for smoke & thermal detectors and therefore interchangeable. Suitable provision shall be available for with each detector locking its head with the base.

xii) The detector shall be suitable for wall/ column/ ceiling mounting. xiii) The detector shall conform to relevant international standards such as BS, En. Test

certificates and reports shall be supplied. xiv) Operating voltage for the detectors shall be 12/ 24 V DC nominal.

xv) It shall be possible to connect the detectors/modules in any combination to the same

detection line. xvi) The detectors shall function normally with the existing cabling system described

earlier. xvii) The detector address setting shall be by means of soft addressing or dip switches or

decade switches, or suitable pre-punched cards. In case of hard addressing the address setting shall be preferably in the detector base, so that, address setting will not change with detector replacement.

xviii) It shall be possible to install and un-install detectors mounted at a height of 7 meters from the floor with installation tool. Suitable installation tool shall be supplied.

xix) In some applications the ambient air pressure may vary up to 2 psig. Supplier shall clearly specify the effect of ambient air pressure on the response behavior of the detectors.

xx) The manufacturing date of fire detectors & other field modules shall be less than two years from the date of dispatch to site. Shelf life shall be specified for each type of detector.

3.1.1.3 Multi-criteria Smoke Detectors [S.D. (M)]

1) The detector shall incorporate, at least, two separate sensing elements. An infra-red photo diode, a photoelectric smoke sensing chamber using the optical scatter principle and thermal detection using a thermistor. Any other sensing element apart from the above if used is not acceptable to the purchaser. It shall be possible to configure the detector to work say as only photoelectric type or only thermal type during normal operation or in a degraded mode in case of failure of any sensing element namely thermal or photoelectric element, respectively. If any one of the sensing elements fails, the control panel shall display this status accordingly.

2) The detector shall be microprocessor controlled intelligent multi-sensor.

3) Ambient air velocity –10 meter per second or more.

4) The detector shall respond quickly to smoke from all combustion materials such as

PVC, teflon, charcoal, wood, cloth, nylon, paper, rubber, acrylic, thermocol, Mylar, Paints, lubricating oil, insulating oil etc.

3.1.1.4 Optical (Photo electric-light scattering) T ype Smoke Detectors [S.D. (O)]

1) It shall respond quickly to optically dense smoke (light white smoke). 2) The light source of SD (O) shall automatically adjust to compensate

for possible effects of dirt and dust accumulation in the sensor. 3) The detector shall be microprocessor controlled and of intelligent type. 4) In addition a few group addressable (con requirements of 1 are required.

of 68

3.1.1.5 Thermal (Heat) Detectors (TD)

1) The Thermal (heat) detector shall be fixed temperature type. 2) The detector shall be microprocessor controlled and of intelligent type.

The bidder at his discretion can quote only for intelligent type of Multi-criteria detector against the requirement of intelligent type Optical Smoke Detectors and Thermal Detectors.

3.1.1.6 Flame Detector- Infrared Flame Detector (IR FD) and Ultraviolet

flame Detector( UVFD)

1) The flame detector shall detect the radiant energy emitted by the flame. 2) The IRFD shall detect flickering infrared radiation of CO2 spectrum

emanating from the open flame caused by combustion of organic material and shall not respond to continuous radiation. The detector’s surveillance circular and encompass 90

0. It shall be of triple IR sensor type.

3) The UVFD shall be sensitive to the UV radiation emitted by flames

during combustion, especially pertaining to hydrogen flame. The detector shall respond to ultraviolet radiation (185 to 260 nm) emitted by almost all flames, including those invisible to naked eye, example- hydrogen fires.

4) The detectors shall have a high resistance to disturbances generated by lighting, direct or indirect sunlight, arcing and artificial light sources.

5) The suitable mounting fixture for wall & ceiling mounting shall also be supplied along with flame detector.

6) The IRFD and UVFD shall preferably be separate detectors & shall be connected directly into loop with interface module in case of conventional type.

3.1.1.7 Beam Type Smoke Detectors [BD]

1) It shall consist of a transmitter and a receiver unit contained in separate housings. The detection range shall be 10 m (min.) to 100 m (max.) (Straight-line distance).

2) It shall employ an obscuration detection principle using a tamper proof, modulated

invisible infrared light beam. 3) The response sensitivity of detector shall be field-selectable from multiple factory-calibrated

levels according to the length of beam and to local conditions. 4) It shall be possible to test the sensitivity of a detector in the field. The necessary

accessories (test devices) for the same shall be supplied. 5) The transmitter shall have a semi-conductor light source to ensure long term stability. 6) The receiver unit shall have a photocell specially designed to ensure long-term

stability. 7) Reduction of light output of transmitter and soiling of transmitter and/or receiver shall be

electrically compensated to avoid malfunction/ false alarm. 8) The housing of the detector shall be sturdy so as to prevent false alarms by

vibrations and movements of the supporting structure. 9) Absorption of beam by soiling of transmitter and / or receiver shall release a fault

signal before detection capability is impaired. 10) Sudden interruption of light beam having duration more than approx. 20 seconds

shall produce a fault indication and not an alarm signal. 11) Suitable test filters for each sensitivity setting shall be supplied. 12) Detector alignment tools shall be provided for fast and accurate alignment of beams. 13) Fine adjustment of beam direction shall be possible. Locking of the alignment shall

be possible without changing of the set alignment.

of 68

14) The detector shall be connected directly into loop in case of addressable type & with interface module in case of conventional type.

3.1.1.8 Duct Mounted Type Smoke Detector [SD (D)]

1) It is used for monitoring the return air streams inside ventilation ducts where air flow is in the range of 1 meter/sec. to 20 meter/sec.

2) It shall deviate a small amount of air from regular to high velocity air-conditioning and/or ventilation ducts into a special chamber, which contains a standard smoke detector.

3) There shall not be any requirement of adjustment for air streams between 1 m/sec

and 20m/sec. 4) It shall have either a multi-criteria or a optical type smoke detector with a built-in

base. 5) It shall have a transparent cover over the detector so that the degree of soiling can

be checked without opening the unit. 6) It shall be designed so that all service work can be carried out without affecting the

duct system. 7) The alarm indicator shall be clearly visible from outside. 8) The housing of the unit shall contain 4 openings for compression cable glands. If

unused, these openings shall be covered with plugs. 9) The detector assembly & its covers shall be joined by suitable gasket to prevent

unwanted passage of air and/or smoke. The gaskets shall have long life at specified maximum working temperature.

10) It shall be equipped with a terminal block with terminals suitable for wire sizes up to 1.5mm

2.

11) It shall be designed for complete sealing of the duct penetration necessary for the sampling tubes and for fastening the air duct detector assembly.

12) Suitable template for duct penetrations, required hardware, and installation and maintenance guidelines shall be provided.

13) It shall be designed so that there is a complete separation between detection chamber and the compartment containing the affiliated electronics.

14) It shall be supplied with the appropriate sampling tubes.

15) It should be possible to mount the duct housing on a circular ventilation duct. Additional fixtures required for circular duct shall be supplied. The no. of such fixtures is given in Bill of Quantities.

3.1.1.9 Intrinsically Safe Optical type Smoke Detec tor (SD (O) INT.)

1) The intrinsically safe optical type smoke detectors (SD (O) INT) are to be installed in hazardous areas e.g. near hydrogen cylinder storage area in turbine building.

2) The detector shall be intrinsically safe and shall have approval of international agency such as (BASEEFA) UK or equivalent.

3) All accessories required for limiting power to the detector such as zener barriers, protocol translator etc. shall be supplied along with detector. The energy limiting circuit such as zener barrier will be located in a safe area.

4) These detectors shall preferably be of intelligent type. Group addressable type can be offered if intelligent type detectors are not available. These detectors are also required to meet the clause no 3.1.1.3.

3.1.1.10 Manual Call Point [MCP]

1) Manual Call Points (MCP) shall be addressable and comprise of a push button placed in a suitable metallic enclosure with a glass/ fiber front.

2) It shall have a clear instruction on how to operate it. This shall be on the MCP front plate & not on the glass/ fibre.

3) Replacement of glass/ fiber cover shall be simple & easy.

of 68

4) A built-in alarm indicator lamp shall be provided. 5) Suitable earth stud shall be provided. 6) MCP shall be suitable for use in outdoor environment and shall have at least ingress

protection category IP-66. 7) It shall be suitable for column/wall/pedestal mounting. Suitable mounting accessories

shall be supplied along with the MCP. 8) Terminals provided shall be capable of accepting 1.5mm

2 conductor size.

9) It shall be possible to connect the manual call point to the standard 4-wire/ 2 wire detection line.

10) MCP housing color shall be post office red. 11) Glass breaking mechanism ( hammer) to be supplied along with fixing arrangement

on MCP

3.1.1.11 Loop powered relay modules or CPU Motherb oard/ backplane bus powered relay modules

1) Loop powered relay modules or CPU Motherboard/ backplane bus powered relay modules

shall provide at least 4 numbers of potential free contacts. These contacts shall be software assignable in the event of fire in a zone. The contacts of these modules shall be able to drive the user output electromagnetic relays, whose contacts will be used to trip the relevant ventilation dampers or exhaust fans.

2) Loop powered relay modules shall be able to communicate to the FAS control panel in a class-A type of wiring. For this an additional loop card shall be provided in each control panel.

3) These modules shall have its own address similar to other detectors. The Loop powered relay modules shall be equipped with built in isolator.

4) Loop powered relay modules or CPU Motherboard/ backplane bus powered relay modules shall be configurable in fail safe mode.

3.1.1.12 Plug in Bases

1) Plug in bases shall be compatible with multi-criteria, optical and thermal detectors. It is preferable to have a common base for intelligent type of multi criteria, smoke and thermal detectors.

2) It shall be possible to insert and remove detectors by a single push twist movement. 3) The base shall have locking feature to prevent loosening of detector on its own. 4) Installation & removal of detector located at height (up to 7 m from floor) shall be possible

with the help of detector removal tool, which shall also be supplied. 5) The base shall be equipped with field terminals capable of securing field wire sizes

up-to 1.5mm2.

6) The base shall have suitable cover to prevent dirt, dust, water etc. before detectors are plugged in.

7) The base shall be suitable for mounting on a standard four way GI mounting box. Required no. of GI mounting boxes shall be supplied.

8) The base shall be suitable for wall/ column/ ceiling mounting.

3.1.1.13 Zone Module Unit [ZMU] 1) The Zone Module Unit shall be able to communicate to the FAS control panel in a class-A

type of wiring. The ZMU shall have its own address similar to other intelligent detectors. The ZMU shall be equipped with built in isolator

2) It shall be possible to connect beam detector and conventional detectors to the Zone Module Unit in a class-B type of wiring. The conventional detectors are optical, flame & beam detectors. The ZMU shall also monitor contact output.

3) Preferably, the working voltage of ZMU may be same as the addressable loop and the power consumption shall be minimum. However, separate power supply requirement, if any to the ZMU will be provided. ZMU shall indicate fire if any conventional detector connected to it is in fire alarm condition. ZMU shall indicate fault if any beam detector

of 68

connected to it is in fault condition (open circuit of field cable in beam detector). The status of ZMU shall be displayed on the control panel. The ZMU shall have line supervision features. The ZMU shall be suitable for harsh industrial environmental conditions.

3.1.1.14 4-Way GI Mounting Boxes for Bases of detec tors 1. It shall be possible to mount fire detector base on the 4-way mounting box. It shall

be of square type design of size 150x 150 x 60 mm for smoke, heat 2. detectors, flame detectors, zone modules & MCP’s 3. The 4-way mounting box shall be fabricated from GI sheet metal of 16 SWG

and shall be galvanized after pretreatment. 4. The 4-way mounting box shall have provision of knock out holes from four

sides for cable termination. 5. A stud for grounding of cable shield shall be provided on the mounting box.

3.1.1.18 Existing cabling scheme from FAS control p anel to detectors

The existing cabling scheme from FAS control panel to detectors comprises of multi pair PVC cables of 16 AWG Cu conductor run on cable trays and 2 core 1.5 mm

2 Cu

conductor Mineral Insulated (MI) laid inside the building or one pair 16 AWG PVC cable, Cu conductor laid inside GI conduit inside the buildings. The multi pair cables are laid in cable trays up to a Junction Box (JB) in each building. From the JB, either 2 Core MI cable or single pair FRLS cable in GI conduit is used for connecting the detectors inside the building in class-A mode up to the return JB. Again from the return JB, multi pair cables laid in cable trays is used for connecting them to control panel to form a closed loop. The bidder shall confirm that the panels being offered by them will work with the existing cabling scheme described above and any limitations shall be clearly specified by them in the offer. The cable scheme is shown in Figure -2. In certain cases, the existing cabling for conventional detectors will have to be wired to the newly installed ZMU( to be done by bidder).

3.1.2 Input Signal Processing i) The control panel shall accept and process inputs from detectors and field modules

without requiring replacement of existing cables connecting the detectors with FAS control panels. Although at some places, cables are required to be laid for installation of additional detectors and to connect zone modules with conventional detectors. .

ii) The control panel shall accept and process inputs from intelligent type of detectors and field module devices.

iii) Each control panel shall be supplied with 2 loop cards and expandable minimum 10

addressable loops. However, the main controller shall be redundant. iv) The control panel shall have the capability to process and evaluate collective signals from non-

addressable automatic detectors such as flame detectors, beam detectors and intrinsically safe type detectors via class-A/ B line circuits. This shall be done through use of zone monitoring units connected to addressable loops.

v) All the detection line circuits shall be monitored against open circuit, short circuit and ground faults. If malfunction occurs in any detection line, the control panel shall indicate a trouble condition for that detection line. In addition, the following criteria shall also be met:

a) Fault in one detection line shall not affect the functioning of other detection lines. b) A single open circuit shall not inhibit the detection capability of a detection circuit; the

remaining circuit should still remain functional. c) A short circuit shall not inhibit the detection capability of a detection circuit. d) A single Ground fault shall not inhibit the detection capability of a detection line.

vi) Provision shall be there for both Class-A and B type wiring for detector loops. vii) Control panel shall have facility to be connected into a network. The required number of

compatible cards in control panel and Operator Information Console shall be provided. RS 485

of 68

and/ or Ethernet communication shall be preferred. The bidder shall clearly specify the networking scheme and limitations, if any.

viii) The control panel shall pinpoint the location of troubles/ fault for easy maintenance. The loop length capabilities for class-A wiring in addressable detectors shall be 2000 meters with the cables per point no. i) above. Any limiting factor in terms of cable length, cable resistance, cable capacitance or any other parameter shall be clearly specified by the bidder in his quotation.

ix) History Log: The following facilities also shall be available in the control panel on demand.

a) Current alarm summary report. b) Current fault summary report. c) Disabled point’s summary report. d) History log of at least last 500 events. (Fire alarm, fault, reset etc.) It shall be

possible to obtain a printout of above reports/log. 3.1.3 Output

The outputs required from the control panel are as follows: i) Audio Alarm hooter for Station control room.

Two nos. of hooters for each unit, each to be located in the respective plant control room shall be supplied. The two hooters shall be loop powered. They shall sound on every occurrence of the fire alarm in any panel of the given equipment with specification as follows:

1) Sound intensity at 1 m distance=90 decibels (with volume controller). 2) Alarm tones: Continuous tone (300Hz to 3 KHz approx. selectable) Facility shall be provided to acknowledge (mute) the hooter from the Control Panel and

from PC based Display Station. The hooter shall sound when any of the FAS control panels detects fire. However, after acknowledgement if any fresh alarm is reported, the hooter shall sound again. An Interrupting audio in fault condition shall be generated for the faults occurring in any control panel.

ii) Contact outputs for station control room window annunciator

Two potential free relay change over contacts- one each for common fire and common fault conditions shall be provided. These contacts will be used for control room window annunciation. The contact rating shall be 0.5A, 48V DC. These contacts shall go back to normal state only after the initiating event is rectified and reset at the control panel. These contacts are to be used for main window annunciation on main control room panel. For this additional interposing relays connected to CPU Motherboard/ backplane bus powered relay modules should be provided in the FAS control panel. Adequate number i.e. at least two number of CPU Motherboard/ backplane bus powered relay modules configured in fail safe mode should be provided, to take care of single module failure. The relays (used for the above conditions) shall be normally energized and shall be de-energized in the alarm condition to ensure the fail safe operation.

In addition, FAS signal outputs for LED indicators (24 V, 13 mA to 20mA) shall be provided for common fire and common fault. These signals also shall be control panel wise and will be installed in the main control room. The LED’sfor fire shall be of Red colour and for fault it shall be of yellow colour. The LED indicators are in the scope of supply.

iii) Alarm output to fire station

of 68

Whenever a fire is reported in FAS of any unit, an automatic signal transmission to fire station shall take place. This signal shall be latched until the fire condition disappears and the control panel is manually reset.

At the fire station (2 km cable distance from the control unit) a six point audio-visual annunciator shall accept the signal from the FAS control panels. This annunciator is common for both units of plant. It shall be capable of accepting 6 inputs.

As soon as the fire signal is received in the annunciator the inbuilt hooter shall sound and an appropriate window (visual indicator) shall light giving description as first unit or second unit as the case may be. The sound shall be audible even at a distance of 10 meters from the hooter. An acknowledge facility for hooter also shall be provided, along with visual indication to show that an alarm has been

acknowledged. Reset facility for six point annunciator shall also be provided. The annunciator shall have test facility also. Every new alarm with existence of an old alarm reported by any control panel shall cause the hooter of the annunciator to sound again.

iv) Relay module

The following outputs shall be provided on the Relay module for operating ventilation system dampers, fans etc.:-

A total of 72 Electromagnetic relays shall be provided in the Relay module. Each relay shall provide four numbers of potential free changeover, output contacts with rating of 5A in 48 V DC & 240 AC. Loop powered relay modules or CPU Motherboard/ backplane bus powered relay modules potential free contacts drive these Electromagnetic relays. The Electromagnetic relays shall be in energized condition normally and shall de-energise in fire condition. These relays shall be housed in FAS control panel. Relay module if not feasible to accommodate in FAS control panel, bidder should provide alternate and the same to be supplied as a part of FAS control panel. At least, 15 terminal strips each of 100

terminals shall be provided for 1.5 mm2 relay output terminations at the panel.

3.2 Interface with Central Clock System/ Control Ro om Computer System (CRCS)

FAS should preferably accept the time synchronization data from Central Clock System. FAS control panel & Display unit time should be synchronized with Central Clock System. The details of the clock pulse etc. shall be made available to the successful bidder.

FAS shall provide potential free contact outputs to CRCS (existing data logger system). The contact outputs required are for logging of fire alarm, fault in FAS, faults/ failure of DC power supplies and faults/ failure in OIC. For meeting these requirements at least 10 numbers of spare relays are required in each control panel.

3.3 Functional Requirements

a. FAS shall detect fire in its incipient stage and give an audio-visual annunciation in the station control centre for the same with the quick and exact identification of the fire location.

b. False alarms shall be minimized. At the same time genuine fire alarms shall not be missed.

of 68

c. Reporting of fire alarms shall have priority over faults. However, provision shall be available to view all the fire and fault alarms.

d. FAS shall provide zone wise potential free output relay contacts (which will be used for tripping of ventilation system fans/dampers/air handling units on detection of fire in specific areas for effective fire protection).

e. FAS shall provide various graphical displays (mimic) on demand and generate demand and routine printouts.

f. FAS shall generate contact outputs for fire / faults alarms on main window annunciation.

g. All alarms & faults generated by FAS shall be lock-in type. h. Basic operation of the control panel in case of alarm or trouble shall be through user-

friendly menu driven screens. i. Control panel shall be equipped with an alarm acknowledge push button. This shall be

operational at all times. j. Control panel shall also be equipped with a system-reset button for setting the control

panel into normal condition.

Control panel of the FAS shall meet the following functional requirements:

The various types of field mounted detectors and other modules are connected to the centrally located Control Panels. The central microprocessor/controller shall be redundant for 10 loops but it can be in the same module/ card. However, every loop module shall have a separate microprocessor, redundant microprocessors present in the same card catering to two loops is also acceptable. Also, in case of redundant microprocessors/controllers in the same control panel, the system shall continue to function normally even if a single microprocessor/controller fails and the system shall annunciate the fault. Similarly, in case of redundant microprocessor circuit present in any other module of the control panel, the system shall continue to function normally even if a single microprocessor circuit controller fails and the system shall annunciate the fault. FAS programs shall be contained in a non-volatile memory. As already stated, intelligent system shall be quoted. It shall receive the alarm signal/ fault signal from the detectors, process the same & shall provide audio-visual alarm depending upon input signal. It shall be modular in design & its configuration shall allow for extension. It shall have response time of 10 seconds. It shall have LCD display preferably with keypad/touch screen. It shall have the facility to network with other control panels & OIC. Database configuration shall be through easy menu driven software and shall not require knowledge of higher level computer language. FAS shall control up to 4000 addresses (stand alone or networked) with 1000 address per control panel.

Control panel as a minimum shall comprise of following modules:-

i) microprocessor/controller Module:-

This module shall scan the input loop cards at a regular interval, process the data received and control all relay outputs, various displays & provide self -diagnostic features etc. This module shall also provide the HMI interface having keypad, LCD display and LED indicators. HMI interface module can also be separate from microprocessor/controller Module.

ii) Power supply Module:-

This module shall accept the 240V ac input and convert it to the required voltage for catering to the power supply needs of the Control panel.

iii) Other Modules:- This modules as required shall be provided for Serial communication link between panel and with display station, HMI interface and for generation of the common fire and fault contacts, if these are not provided as part of controller Module, modules driven by Loop Modules required for generating output contacts on detection of fire which will be used for driving the user output

of 68

relays. iv) Addressable Loop Modules:-

Addressable line module shall be capable of processing and evaluating incoming signals from intelligent detectors such as smoke and heat detectors, zone modules and manual call points, etc. via Class-A line circuits. Addressable module shall facilitate connection of zone monitoring unit to interface non-addressable devices like flame, beam, intrinsically safe type detectors, and other accessories such as contact monitoring module etc. The following requirements are applicable for loop modules.

a) Each loop circuit shall have capacity to handle minimum 250 field devices

/modules /addressable devices of all types. b) The operating power for the detection devices shall be supplied through the regular

two-wire loop. c) Each addressable line module shall have its own microprocessor-based circuit,

working independently from the central processor board located in the control panel. In case each loop module caters to 2 loops in class-A mode, then the microprocessor module shall also be redundant. Failure of one microprocessor shall not affect the functioning both the loops. Similarly failure of one loop shall not affect the functioning of the other loop. The fault in both the cases shall be clearly annunciated.

d) It shall be possible to connect fire hooter (audio unit) in the same addressable line without external source of power.

Additional functional requirements of the Control panel are the following:

1) Zoning

The panel shall have provision for minimum of 96 zones. One or more detectors belonging to one line circuit will constitute a zone. In case a detector in a zone detects fire, then the panel LCD display shall indicate that zone name and number etc. It shall be possible to define the zones through software i.e. zones shall be user defined through keyboard commands during data base creation/editing by the user at site.

2) Disabling of detectors / Zones

It shall be possible to disable detectors individually, zone and loop wise from the control panel. There shall be provision for “On Demand” l along with date & time of disabling and identity of person who disabled the detector. (E.g. login details, but not the password) on the LCD display. Disabled detector/zone /loop shall not report fire alarm or fault.

3) Field wiring faults

All open circuit, short circuit and ground faults in field wiring (detector loop & wiring of other equipment such as hooters, network cabling etc.) shall be reported as trouble by the control panel. The location of such faults shall be identified & reported by the system or else it shall provide adequate diagnostics to identify such faults easily.

Functional requirements of the Embedded Software for respective detectors are the following:

i. Evaluation and analysis of the signals based on stored algorithms,

from the smoke sensor and/or thermal sensor depending on the type

of 68

of detector (say optical or thermal or multi criteria) and to decide normal condition /fire alarm as the case may be.

ii. Generation of a fault signal if the optical sensor becomes contaminated beyond the threshold limits.

iii. Preservation of loop functions and integrity in the event of wire break in a loop or short-circuit of a loop through integrated isolators present in the detector.

iv. Facilitation of individual detector identification on the fire panel under all states i.e. normal /alarm /fault by communicating the status when it is polled by the control panel.

v. Provision of various sensitivity settings, for better detection. 3.4 Functional Requirement under various modes

Fire alarm System is required to work under all times and in all stages of reactor operation.

3.5 Human Computer Interface requirements

HMI requirement for various components of FAS shall be as given below: 3.5.1 Display Unit

Display Unit of the control panels shall consist of following:- (i) LCD display

One back-lit LCD display with minimum two lines of 40 alpha-numeric characters shall be provided. The LCD shall display events such as fire, fault & isolate etc. along with event number, time, date, detector type, loop number, detector tag, zone number and user programmed messages etc. The LCD shall display clear messages.

The display should also guide the operator in case of multiple fire alarms and fault conditions through system configuration and operation menu. In case of simultaneous occurrence of fire & fault, fire alarm shall be displayed first. It shall be possible to view the existing faults in such cases. Error messages shall also be displayed for operator’s convenience.

(ii) LED indication

The following LED indications shall be provided: 1. System Healthy/Power ON. 2. Alarm for fire. 3. Fault. (iii) Switches

Silence/Mute, Acknowledge, System Reset & Test switches/push buttons shall be provided on the Control panel and Display Unit.

3.5.2 PC based Display Station (OIC)

The PC based Display Stations shall be provided for operator interface. One station will be kept about 10 M (cable distance) away from the FAS control panel of first unit. It shall display all information from the control panel.

of 68

The PC based Display Station shall display fire/trouble signals graphically on the monitor. Whenever a fire/trouble is reported the corresponding mimic shall be automatically displayed. However, fire alarm graphics shall have priority over fault graphics. Suitable identification shall be provided on the screen to distinguish the area with different color and flashing of object which shows alarm/trouble condition. The system shall have provision for, at least,100 mimics (zone wise) to represent floor graphics.

In case of multiple alarms, the latest alarm mimic shall be displayed with a

message to operator about other alarms.

Process for data archival & retrieval shall be specified. Provision shall be made to take back up of the configuration database. The data about alarm shall also be stored in the hard disk for retrieval at a later stage.

User-friendly color display formats shall be followed to clearly display all essential information. It shall be possible for the operator to view other floor plans by touch of a key/click of a mouse.

A high level of system security shall be achieved through the use of passwords. All software tools required for creation of database, the graphics & diagnostics shall be provided. It shall be possible to configure the database of the FAS control panel & create floor mimic zone wise. The software of display station shall have provision to download/upload the FAS control panel field database.

As far as practicable all operation shall be possible with simple single key/mouse operation. Positioning shall be done using arrow keys as far as possible.

Following functions shall be possible from the PC based Display Station:

i) All operator actions related to alarm and alarm clearance, faults & fault clearance. ii) Sensitivity setting, detector disabling etc. iii) Commands, reports and system programming iv) Diagnosis and periodic testing. v) Time and date adjustment. (The system shall preferably adjust its time based on the

signal from central clock system.) vi) Any other operations such as muting of hooter, panel reset etc. vii) Printing viii) The History/Reports

Following history report shall be available on PC based Display Station:

1. Current alarm summary report. 2. Current fault summary report. 3. Disabled point summary report. 4. Device diagnostics report. 5. Status monitoring of point. 6. Historical log of last 10000 events (events such as alarm, trouble, maintenance

alarm, etc.). It shall be possible to archive the historical log database in a separate file for offline viewing.

7. Text messages.

Text messages shall be provided for fire/trouble reporting at the operator station. It shall also be possible to program descriptive messages to give operator information such as actions to be taken in case of fire/fault etc.

The Display Station shall have a provision to network more than one such similar/ identical

of 68

Display Station. The bidder shall clearly specify in his quotation the networking scheme in such a case along with the limitations in operation etc. The Display Station PC and Monitor shall be housed in a freestanding console. The power supply requirement shall be met from the respective equipment.

Logging

The system shall provide Alarm log (whenever alarm occurs or gets cleared) and log of acquired data. In any logging the identification of the FAS Panel No. or identification of the detectors shall be logged (on non-volatile memory).

System Configuration Database

i. Generation of the configuration database of the fire alarm system control panel shall

be through easy, menu driven software. Generation of the configuration database of the fire alarm system shall be possible from the control panel as well from the FAS display station also. It shall be possible to download or upload the field data from & to a PC.

ii. All software tools, which are required for creation of database, configuration of

system facilities, presentation etc. shall be supplied. In case EPROM programmer is required for configuring the data base, 2 nos. of EPROM programmer & sufficient spare EPROMs (6 nos.) shall also be supplied.

iii. The software used in the control panel shall be exclusive for the Fire Alarm system. The

software required for uploading / downloading of database from FAS control panel to the display station shall be provided along with required accessories.

iv. The standards followed for the development of all the software’s(including

configuration database software) of the system shall be specified. v. Communication

The FAS control panel shall have communication ports for following:

a) Communication with Operator Information Console. b) Communication with other FAS control panels. c) Printer port for common printer/ independent printer for printing

events/reports/graphics. It is preferable if the FAS display station supports standard network based printer so that a common printer used in the plant for other systems can be made use for printing FAS alarms also.

d) Port for networking the system with other similar type control panels and other

peripheral devices such as repeater panel in supplementary control centre.

e) The specification of Display Station shall be as follows:-

Configuration of PC The minimum configuration of the PC shall be as follows: Processor : Intel Core i5 processor or better RAM : 8 GB DDR 3 SDRAM Cache : 1 MB or higher HDD : 1 TB or higher DVD-writer : 20X or higher Graphics Card : 2 GB ATI graphics card or better Serial and parallel ports : Two each

of 68

Mouse : Three-button scroll mouse USB Ports : Four LAN cards : Two

If this configuration becomes obsolete at the time of supply of components the supplier shall supply the PC with currently available and popular configuration but not lower than the specified minimum configuration of the PC and necessary approval shall be taken from the purchaser.

Monitor General: LCD colour monitor Size: 22” Diagonal Screen: Tinted antiglare LCD. Indicators: LED’s for power on/off, function Display screen Aspect ratio: 16:9 Pixel resolution: 1920X1080

Keyboard with Mouse/Trackball

The keyboard shall be fully IBM PC/AT compatible, 105 or more keys or better. Printer

On Line printer is to be provided in order to printing of event ( e.g. Normal to Alarm & vice versa , detector trouble /Normal, loop fault /common fault etc) . Additional on demand colour printer laser Jet is to be provided to print various log on demand. Bidder shall clearly specify limitations of use of common network printer for the above jobs. Use of separate printer can be considered only if network printer cannot be used. Supply of printer is not in the scope of this specification. Ethernet Switch:

The Ethernet switches (manageable switch) are required for the data transfer between panels/ PC based display station. The switch converter shall be operated on 240 V AC or operable from DC power supply available in supplied panel with provision of battery backup. It shall be rugged, hardened with vibration/shock resistant. Type: manageable Ports : minimum 16 ports Working temperature: -10ºC to +50ºC Storage Temperature :-10ºC to +60ºC Humidity: 0% to 95% non-condensing Redundant power supply: 240V AC

3.5.3 Repeater Panels

Active Repeater Panel shall be compatible with the FAS control panel offered. It shall be active network repeater. It shall be possible to connect these repeater panels to FAS control in redundant serial link and/ or Ethernet such that failure any of control panel shall not lead to complete loss information on repeater panel from other healthy control panels. Repeater panel will be located in the supplementary control room. The repeater panel shall have an LCD display to view current fire & fault conditions including the details of detectors in fire /fault conditions prevailing on the FAS control panel. The Repeater panel shall have all control keys like Silence/mute, acknowledge, reset& test etc. Test push button shall test lamps and hooter. It shall also be provided with an in built hooter, which can be silenced locally or from the Fire Alarm control panel or display station itself. The distance

of 68

between FAS control panel and Repeater Panel will be about 150 meters, the supplier has to select and supply the suitable network cable for inter connection of these panels along with suitable connectors.

The Repeater Panel shall be wall-mounted type. The power supply required to the repeater panel shall be specified by the bidder.

The bidder shall clearly specify the scheme of connection of repeater panel and control panel.

It is preferable to have a common repeater for FAS equipment (i.e. for 3 control panels for future connectivity of additional 2 pane ls).The bidders shall clearly indicate in his offer if this requirement can be me t or not. Also PC software should have capable to handle at least 3 FAS contro l panel ( present requirement of 1 panel + 2 panels in future require ment.)

3.5.4 Miscellaneous items 3.5.4.1 JBs

JB's shall meet requirements as specified in TABLE-1 below. For JBs in built mechanical locks shall be provided.

TABLE-1 S. No. DESCRIPTION SPECIFICATION

GENERAL

1 Type IP-65 Metal Junction Box

2 Dimension As per requirement.

3 Quantity As per BOQ.

4 Material of Construction

Cold Rolled sheet steel Hot dip galvanized of Thickness1.6mm

5 Mounting Plate As per requirement.

6 Door Solid hinged front door with cam locking arrangement

7 Door Gasket Synthetic Neoprene Rubber

8 Cable Glands As per requirement.

9 Mounting Arrangement Suitable for Wall, Column, Structure etc

10 Colour

Exterior and Interior Finish color shade no. shall be 631 of as per IS:5 Paint Thickness of min. 25 microns and one base coating + 2 finish coating of anti-corrosive epoxy.

11 Gland Plate Removable gland Plate of 2mm thick made ofCold Rolled sheet stee

12 Mounting Bracket MOC Carbon Steel

Environmental

13 Protection class IP 65 as per IS: 13947 Part-1

Options

14 Terminal Blocks 200 or 100 [tentative- will be decided during

of 68

detail engineering] nos screw type, 4 sq.mm Terminal Identification number shall be provided on the center. Insulating material for terminal casing, endplate & end clamp shall be Polyamide-6.6V0 grade Current bar (conducting part) material: Sn-Cu 58 plated with 4-8 micron thickness of tin/Cu-Ni alloy

15 Shield Bus Bar

Tinned copper shield bus bar with16 nos. of M6 holes suitable for 2.5sq.mm. cable size:5mm(thick) x12mm(wide) x 210mm(long)

16 TB Mounting Channel

35 mm. standard, galvanized Mounting channels are interconnected through 1.5 sq.mm. green cable and connected to shield bus bar

17 Earthing Stud M6,on both sides

18 Hinges Made of stainless steel

19 Name Plate

Laser printed SS Name Plate, Tag nos need to be Provided by customer Dimension: 100mm(length) x 25mm(width) x1.6mm(thick)Character height shall be minimum12.7mm

20 Nut, Bolt &Washer

4 nos. Nuts of M10 embedded to facilitate mounting (welded to the box) 4 nos., M10 x 20 bolts & washer with each JB All nuts, bolts and washers are made of cadmium plated carbon steel

Tests & Checks

21

HV Test (Routine Test) for terminal block HV Test Voltage: 1.5 KV

22 IR Test (Routine Test) for terminal block

Test Voltage 500VDC for 1 minute between terminals and mounting connection There should not be considerable drop in insulation resistance before and after the HV test(shall be >100MΩ)

23 Dimensional check(Routine Test) As per drawing

24 Test Reports for review

Chalk powder test report (This is the type test, hence a test report from recognized test lab shall be submitted. No witness of this is possible) Hardness test report on painting (Type Test) Stripping test report on painting (Type Test) Flexibility & Adhesion test report on painting(Type Test) Type test and routine test report of terminal block

3.5.4.2 Lead shield

To reduce the effect of Gamma radiation and to increase the life of detectors, lead shield housings shall be supplied for fire detectors. Lead shield housing for fire detectors shall be mounted in shutdown accessible areas of RB. Refer figure -4.

In order to minimize the effect of ambient gamma radiation on fire detectors to be installed at high radiation areas of reactor building, a cylindrical (hollow) lead shield housing shall be supplied. The housing shall be cylindrical in shape of overall size approximately 30.5cm dia x 17.5 cm height. A 2mm thick CRS sheet cylinder shall have a 3 mm thick lead sheet inside touching the CRS sheet. The housing shall have built in

of 68

plate for fixing the 4 way GI mounting box & detector base and 4 nos. diagrammatically opposite clamps for fixing the housing on the ceiling. The shield cylinder shall be open on the lower side. There shall be opening for cable entry/exit. The housing a size shall be suitable i) for detector testing using safe test device ii) for using detector removal tool. The fire detectors shall operate satisfactorily with the lead shield housing. There should be sufficient gap at the top in the housing for smoke to escape after it passes through the detector.

Figure-4 Sketch of a lead shield housing

3.5.4.4 Cables, glands, conduits & accessories

All the cables proposed & quoted by the bidder for meeting the functional requirements shall be HR PVC insulated and FRLS PVC sheathed unarmored, 500 V grade, individually or overall shielded cables as mentioned in Table-5 Bill of Quantities conforming to BS-5308 - Part-2 for use in Nuclear Power Plant. Conductor of the cable shall be of annealed bare solid circular copper conductor in accordance with BS-6360 or IS-8130. Joints of any kind in the conductor are not allowed. Insulation shall be 85 degree C, Heat resisting PVC (Type 5 of standard BS-6746 or Type C of IS-5831) and shall be meeting physical requirement of this standard. Grade of insulation shall be 500 V. No joints of any kind in the insulation are permitted. Insulation shall be applied by extrusion process. Over the assembled pairs shall be applied non-metallic binder such as polyester. In intimate contact with binder shall be applied polyester backed aluminum tape with minimum 25% overlap such that polyester surface comes to the top. The thickness of aluminium shall be 0.025mm. A tinned solid copper drain wire of 0.75 sq.mm shall run in contact with and below the aluminium tape throughout the length of the cable for grounding purpose. Sheath material shall be FRLS PVC requirements as specified in relevant BS-6746 or IS-5831 respectively. The oxygen index shall not be less than 29 and temperature index shall not be less than 250

0C as per ASTM-D-2863 or IS-10810-58 and smoke

density shall not be more than 60% when tested as per ASTM-D-2843. Smoke density

of 68

test may be conducted as per IS-10810-63. Supplier to indicate the acceptance criteria which is equivalent to 60% smoke density rating as per ASTM-D-2843. HCL emission shall not exceed 20% when tested as per IEC-754-1 or IS-10810-59. It should be possible to strip the Jacket without damaging the insulation. Jacket shall be of black colour. The GI conduit shall be as per BIS standard. Supply of nickel plated double compression brass cable glands complying to BIS standards and all required accessories are in the scope of this specification.

CAT 6 Cable.

4 Pair, unshielded twisted pair CAT-6 shall meet ratings suitable for 100 base-TX Ethernet data network. The quantity shall be supplied in 350 meters in single length boxes and shall comply with the following specifications:

Sr. Description Requirement No.

1 Conductor: 24 AWG Annealed bare solid copper CAT-6 UTP Cable

2 Frequency: 100 Mhz

3 Attenuation( Min. at 100 Mhz): 22 db

4 Characteristic impedance: 100 ohms +/- 15%

5 Outer Sheath Material LSZH

It shall Support for Fast Ethernet and Gigabit Ethernet IEEE 802.3/5/12 and broadband.

3.6 Performance Requirements

Following are the essential performance requirements of the FAS control panel: i) Scan rate, alarm response time & system response time: a. The alarm response time of the control panel for fire alarm shall be within 10 seconds after

the fire is detected by the sensor. The response time of the control panel for declaration of faults shall be within 180 seconds of occurrence of fault.

b. Response of the system to any operator action such as hooter mute/alarm

acknowledgement, etc. at the panel shall be within 5 seconds. Reset shall be completed within 5 seconds.

c. Up-dating of display data in display station and response to the operator command shall be within 5 seconds.

All the above response times shall be irrespective of following: -

Number of detectors/devices/modules per loop. Number of detectors per zone. Number of zones per loop. Number of loops in a panel. Multiple fire or fault alarms.

Number of panels in the system (networked). d. Initial Display Lag: Maximum Time taken for the first complete display to appear on

the monitor after the operator's command shall not be more than 5 seconds, under normal conditions. Refresh rates of displays shall be specified.

3.7 Safety Requirements

of 68

The FAS control panel and detectors shall be seismically qualified. The potential free contact outputs provided by FAS shall be designed for fail-safe feature i.e. the relays should de-energise during fire alarm conditions and shall be energized in normal i.e. no fire condition.

Single failure in FAS shall have no effect on System outputs. Total failure of the FAS due to failure of all 240V AC inputs of the control panels or failure of all AC to DC converters in all the control panels shall result in Fire alarm & fault alarm annunciations in plant control room (Fail safe mode) and the output relays shall also be configured in fail safe mode.

3.8 Fault Tolerance Requirements

FAS shall continue to carry out all the major functions even with following single failures

a) Single open circuit fault. b) Single earth fault. c) Single short circuit fault. d) Single failure of controller e) single failure of network links connecting FAS control panel with repeater panel f) Failure of display station. g) Failure of one AC input or/ one AC to DC converter.

3.9 Security Requirements

A high level of security shall be achieved through the use of passwords. Specified security requirements should take into account requirements of access to computer system (access to hardware/software) and ensure access should be granted, as per needs of the person at different levels viz. operator, supervisor and maintenance personnel etc. through secured means such as hardware key interlocks and / or passwords. The system shall have user classification such as super user (administrator), supervisor and operators etc. The super user/ administrator shall have access to all menus and other users to selected menus. The system shall keep a log of the identity of the users. Log containing user name, login/logout date/time, changes made in the database etc. shall be provided.

3.10 Self-Diagnostics Requirements

The system shall have extensive on line & off line self-diagnostic features. Self-diagnostic shall be provided for fire detectors and field modules, loop cards/Modules, CPU modules, Display unit, LAN links/devices and other links.

CPU card/modules and loop card/modules shall have fault detection features and shall detect faults in processor, memories, supply voltage, invalid detector signals, communication modules/links, wrong mounting position etc. In case of any fault or disturbance, appropriate messages on LCD display and/or indications shall be provided. These shall be annunciated on control panel/ display unit. Also, the common fault contact in the control panel shall change its state which will be wired up to plant control room for annunciating FAS TROUBLE/FAILED window on main control room panel. If a module fails, output relays shall go to de-energized state and shall have open to alarm contacts. All failures within FAS shall be logged. In addition to the above it shall be possible for the operator to initiate a manual test of the system.

3.11 On-line Testability Requirements

The on line diagnostics shall continuously monitor the correct functioning of all the

of 68

modules, detectors, healthiness of loop wiring, etc. and the control panel shall report all the troubles for quick and easy rectification.

All the detection line circuits shall be monitored against open circuit, short circuit and ground faults. If malfunction occurs in any detection line, the control panel shall indicate a trouble condition for that detection line. In addition, the following criteria shall also be met:

a) Fault in one detection line shall not affect the functioning of other detection lines. b) A single open circuit shall not inhibit the detection capability of a detection

circuit; the remaining circuit should still remain functional. c) A short circuit shall not inhibit the detection capability of a detection circuit. d) A single Ground fault shall not inhibit the detection capability of a detection line.

3.12 Off-line Testability Requirements

Off-line diagnostics shall help in finding the faulty module in the panel.

Detector Test Set A detector test set for testing the detectors functionally shall be offered (for off-line testing). This shall comprise a CPU card/ loop card and one type of each card/ module. The test set shall:

i) Be self-contained and hand held. ii) Have internal rechargeable battery operated with 8 hours operation time. iii) Be equipped to receive external 240 volt AC power supply. iv) Have comprehensive tests/ programs for checking functioning and performance of

individual detectors, auxiliary devices. v) Be menu driven. vi) Be provided with carrying case with space for charger and accessories.

Safe Test Devices Suitable safe test devices allowing testing of detectors at a height of 7m from floor (with collapsible type of concentric rods) shall be supplied for all type of detectors.

Test devices shall be as follows for various detectors: a) Smoke detectors - smoke/ aerosol generators. b) Thermal detectors - hot air blower c) Flame detectors - test lamp d) Beam detectors- test filters.

3.13 Reliability Requirements

The system shall operate reliably under all conditions and under no circumstances, there shall be erroneous output. For this, the basic FAU and detectors offered shall comply with the relevant En-54 standards. Standalone Power supply unit shall comply with the relevant En/IEC standards for EMI/EMC requirements and Environmental requirements.

3.14 Availability Requirements

To increase availability of the plant, the system shall be designed to be fault tolerant as explained in clause 3.8. Faults in the cards/sub-system shall be localized so as not to affect other part of the system.

3.15 Maintainability Requirement

of 68

Maintenance Alarm Reporting: The control panel shall be able to identify a detector needing maintenance (due to dust collection etc.). To achieve this, suitable algorithms may be used. A detector needing maintenance shall be reported on LCD displayed as dirty detector

3.16 Typical System Architecture

Refer Figure-1 and General Description for typical system architecture. 3.17 General Requirements 3.17.1 Power Supply Requirements

FAS Equipment will be fed with two independent 240 V AC, single phase, 50 Hz CL-II AC Power Supply sources as specified above. One of them will be called ‘Main’ & other the arrangement one ‘Standby’ for Fire alarm control panel would be as follows:

Main supply will be fed to the power supply module of the FAU. This power supply module shall generate the required 24V DC or necessary DC power supply needed for control panel. Standby supply will be fed to the separate standalone power supply module (AC to DC converter) and its output will be fed to the battery input terminals of FAU. This power supply module shall generate the required 24V DC or necessary DC power supply needed for control panel. Refer figure-5. Vendor shall confirm that this arrangement. In normal condition, when both the supplies are available, Main supply would be feeding the loads and only on failure of either mains supply or power supply module of the FAU, Standby supply would be feeding the loads through its standalone power supply module. Either of the PSU shall be capable of feeding the entire load of the Fire alarm control panel.

SPD: Surge Protection Devices Figure-5

The arrangement for Fire alarm Relay panel would be as follows: Main supply will be fed to the standalone power supply module (AC to DC converter). Standby supply will be fed to another separate standalone power supply module (AC to

of 68

DC converter) and the outputs of both the PSUs would be diode paralleled to feed to the load. This power supply module shall generate the required 24V DC or necessary DC power supply needed for relay panels. Either of the PSU shall be capable of feeding the entire load of the Relay panel. Refer figure-6. Vendor shall confirm that this arrangement.

The ‘ON’ indications for both (Main & Standby the unit shall be provided.

i) Required number of Miniature circuit breakers for the power supplies shall also be

provided. ii) There shall be provision for annunciation of failure of Main or Standby power

supplies on the panel. iii) The FAS Equipment shall withstand an interruption of input power supplies for 200

milliseconds without any effect on continuous functioning and loss of information. iv) In case of total loss of power supplies, system shall restart on resumption of any one of the

power supplies and no re-programming of the system should be required.

SPD: Surge Protection Devices

Figure-6 3.17.1.1 Stand Alone Switch mode power supply (SMPS)( For FAS Control Panels and

Relay Panel)

The SMPS shall be housed suitable for rack mounting in standard electronic panel. The SMPS shall be designed for natural cooling. The AC input shall be nominal 240 V, 50 Hz. The DC output shall be nominal 24 V. The rating, input voltage type and level and output DC voltage of SMPS and quantity of each type required shall meet FAS requirements.

Following are the technical requirements for SMPS

S. Technical Requirement No.

1. Input Voltage range

240 V 50 Hz, (±10 % of nominal), -30% dip for duration of 200 msec

2

Output voltage& current

5V DC / 20 A ( For FAS controller, if required) 24 V DC / 12 to 15 A (as per FAS panel requirement)

3 Output voltage ±10 %

of 68

Adjustment

4 Load regulation Less than or equal to ± 0.5 % for a load change of 5% to 100%& at minimum to maximum input voltage

5 Line regulation Less than or equal to ± 0.5% 6 Ripple + Noise Less than or equal to ± 1% peak to peak at full load

7

Parallel Operation / current sharing facility

Internal OR-ing diode hot-swap operation/ Active current sharing

8 Short circuit protection Required

9

Output over voltage protection Required

10 Overload protection Required

11 Thermal protection Required

12 PFC Required to annunciate its failure 13 Control fuses Required

14 Power supply LED indications

The front facia of the power supply module shall have LED indications for displaying various parameters

15 Grounding Ungrounded

16 Operating Temperature

0 degree centigrade to 55 degree centigrade, up-to 95 % RH non-condensing

17 Seismic TEST As per section 3.18.2 of this specification.

18 Climatic test

Dry heat Complies with IS 9000 part III, section 3 Damp heat Complies with IS 9000 part V, section 2 Or as per relevant EN standards

19 EMI/EMC test as per relevant EN standards 20 Mounting 19” rack mountable 21 Cooling Required Relevant test certificates and reports shall be submitted to check compliance to EMI/EMC test, Climatic test and functional tests. Note: at least 16 Hours battery back up provision s hall be provided. Suitable mains 240 VAC failure/battery charger failure/battery on load indication along with potential free contact out puts shall be generated . 3.17.1.2AC Power Supply to Display Station

Single phase 240 V AC power supply will be provided to display station. 3.17.1.3Beam Detector Reset Switch

A push button type switch designated or alternate as ‘ arrangement shall be provided in the control panel/ ZMU. The power supply required for beam Detector shall be routed through this switch/ ZMU.

3.17.2 Environmental & Operating Conditions 3.17.2.1 Climatic Conditions

of 68

The control panel & detectors shall be suitable for continuous operation at the ambient conditions as specified below:

.

Operating condition For FAS control panel For detectors, ZMUs & field modules.

Temperature: 8° to 40° C 5° C to 50° C

Relative Humidity 35% to 80% 50% to 95%(Non- condensing)

Storage condition For FAS control

panel ZMUs &field modules.

Temperature: 5° C to 60° C 5° C to 60° C

Relative Humidity 30 % to 95%( Non- condensing)

30 % to 95%( Non- condensing)

3.17.2.2 Seismic Conditions

The Fire alarm equipment shall operate satisfactorily before and after the vibration tests as detailed below.

The seismic conditions for the FAS panels & detectors shall be governed by the floor response spectra for the corresponding floor. For this the FAU with one type of each cards/ module, standalone power supply module shall be mounted on shake table for the seismic test. Prior to test a resonance search will be conducted on the equipment for Frequency range of 1 to 100 Hz, with sinusoidal motion in three orthogonal directions on one axis at a time. The seismic motion is given to the shake table in such a way that the Test Response Spectrum (TRS) envelopes the floor response spectrum which is given as Required Response Spectrum (RRS). The FAU with one type of each cards/ module, standalone power supply module must operate satisfactorily during and after the test for Five OBE (Operating Basis Earthquake) and one SSE (Safe Shut down Earthquake). Test Response Spectrum (TRS) for OBE and SSE will be furnished to the successful bidder.

After seismic tests, the FAU with one type of each cards/ module, standalone power supply module & detectors shall be thoroughly:

a) Inspected for permanent deformations, dislocat