cgm.3 system - ormazabal · standard iec 62271-1. figure 1.2 gas tank for cgm.3-l 1.3.2 driving...

cgm.3 systemFully SF6 gas insulated medium voltage switchgear up to 40.5 kV in accordance with IEC Standards

General instructionsIG-136-EN, version 10; 23/06/2016

CAUTION!

When medium-voltage equipment is operating, certain components are live, other parts may be in movement and some may reach high temperatures. Therefore, the use of this equipment poses electrical, mechanical and thermal risks.

In order to ensure an acceptable level of protection for people and property, and in compliance with applicable environmental recommendations, Ormazabal designs and manufactures its products according to the principle of integrated safety, based on the following criteria:

• Elimination of hazards wherever possible.• Where elimination of hazards is neither technically nor economically feasible, appropriate protection functions are

incorporated in the equipment.• Communication about remaining risks to facilitate the design of operating procedures which prevent such risks, training

for the personnel in charge of the equipment, and the use of suitable personal protective equipment.• Use of recyclable materials and establishment of procedures for the disposal of equipment and components so that

once the end of their service lives is reached, they are duly processed in accordance, as far as possible, with the environmental restrictions established by the competent authorities.

Consequently, the equipment to which the present manual refers complies with the requirements of section 11.2 of Standard IEC 62271-1. It must therefore only be operated by appropriately qualified and supervised personnel, in accordance with the requirements of standard EN 50110-1 on the safety of electrical installations and standard EN 50110-2 on activities in or near electrical installations. Personnel must be fully familiar with the instructions and warnings contained in this manual and in other recommendations of a more general nature which are applicable to the situation according to current legislation[1].

The above must be carefully observed, as the correct and safe operation of this equipment depends not only on its design but also on general circumstances which are in general beyond the control and responsibility of the manufacturer. More specifically:

• The equipment must be handled and transported appropriately from the factory to the place of installation.• All intermediate storage should occur in conditions which do not alter or damage the characteristics of the equipment or

its essential components.• Service conditions must be compatible with the equipment rating.• The equipment must be operated strictly in accordance with the instructions given in the manual, and the applicable

operating and safety principles must be clearly understood.• Maintenance should be performed properly, taking into account the actual service and environmental conditions in the

place of installation.

The manufacturer declines all liability for any significant indirect damages resulting from violation of the guarantee, under any jurisdiction, including loss of income, stoppages and costs resulting from repair or replacement of parts.

WarrantyThe manufacturer guarantees this product against any defect in materials and operation during the contractual period. If defects are detected, the manufacturer may opt either to repair or replace the equipment. Improper handling of this equipment and its repair by the user shall constitute a violation of the guarantee.

Registered trademarks and copyrightsAll registered trademarks cited in this document are the property of their respective owners. The intellectual property of this manual belongs to Ormazabal.

[1] For example, in Spain the “Regulation on technical conditions and guarantees for safety in high-voltage electrical installations” – Royal Decree 337/2014 is obligatory.

In view of the constant evolution in standards and design, the characteristics of the elements contained in this manual are subject to change without prior notice. These characteristics, as well as the availability of components, are subject to confirmation by Ormazabal.

General instructions

IG-136-EN version 10; 23/06/2016

3cgm.3 system Fully SF6 gas insulated medium voltage switchgear up to 40.5 kV in accordance with IEC Standards

Contents

1 General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1 .1 Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1 .2 Standards applied . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1 .3 Main components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.3.1 Gas tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

1.3.2 Driving mechanism compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

1.3.3 Base. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1.3.4 Name plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

1 .4 Characteristics table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1 .5 Dimensions and weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1 .6 Operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2 Handling and transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2 .1 Lifting means . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4 .1 Unpacking the equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4 .2 Location of accessories during transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4 .3 Minimum installation distances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4 .4 Recommended cable connection trench . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.4.1 Cubicles with internal arc in gas tank up to 20 kA - 0.5 s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.4.2 Cubicles with classification of internal arc IAC up to 25 kA - 1 s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

4 .5 Fastening to the floor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

4.5.1 Fastening to the floor on profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

4.5.2 Fastening to the floor by anchoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

4 .6 Connecting the cubicles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

4 .7 Earthing the switchgear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

4 .8 Cable connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

4.8.1 Horizontal front connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

4.8.2 Cable connection in fuse protection function 1400 mm high . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

4 .9 Assembly and connection of measuring transformers in cgm.3-m . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33


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4 cgm.3 system Fully SF6 gas insulated medium voltage switchgear up to 40.5 kV in accordance with IEC Standards

5 Recommended sequence of operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

5 .1 Checking the gas pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

5 .2 Voltage presence indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

5 .3 Phase balance check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

5 .4 Feeder function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

5.4.1 Mimic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

5.4.2 Driving levers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

5.4.3 Opening operation from earthing position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

5.4.4 Switch closing operation from the disconnected position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

5.4.5 Opening operation from closed position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

5.4.6 Earthing operation from the disconnected position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

5.4.7 Cable test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

5 .5 Busbar switch function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

5.5.1 Mimic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

5.5.2 Driving lever. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

5.5.3 Switch closing operation from the disconnected position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42


5 .6 Busbar switch function with earth connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

5.6.1 Mimic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

5.6.2 Driving lever. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44


5.6.4 Connection of the switch-disconnector from the disconnected position . . . . . . . . . . . . . . . . . . . . . . . . 46


5.6.6 Earthing operation from open position. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

5 .7 Busbar rise function with earth connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

5.7.1 Mimic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

5.7.2 Driving levers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

5.7.3 Earthing switch disconnection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

5.7.4 Earthing switch connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

5 .8 Fuse protection function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

5.8.1 Mimic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

5.8.2 Driving lever. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51


5.8.4 Spring charge operation and closing of the switch - disconnector from disconnected position. . . . . . . 52

5.8.5 Opening operation from the switch-disconnector closed position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

5.8.6 Earthing operation from the open position. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

5 .9 Fuse replacement sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

5.9.1 Selection of recommended fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57


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5 .10 Circuit-breaker function with AV / RAV driving mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

5.10.1 Mimic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

5.10.2 Spring charge and driving levers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

5.10.3 Opening operation from earthing position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

5.10.4 Closing operation from open position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

5.10.5 Opening operation from closed position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

5.10.6 Earthing Operation from the open position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

6 Safety elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

6 .1 Acoustic earthing prevention alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

6 .2 Interlocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

6.2.1 Locking with a padlock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

6.2.2 Locking with a lock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

7 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

7 .1 Voltage presence indicator test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

7 .2 Acoustic earthing prevention alarm test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

7 .3 Specific maintenance for the cgm .3-v cubicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

8 Spares and accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

9 Environmental information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

General InstructionsGeneral description

IG-136-EN version 10; 23/06/2016


1 General description

The cgm.3 system by Ormazabal, designed following the requirements indicated by regulations of the International Electrotechnical Commission (IEC), is made up of different unifunctional and multifunctional switchgear models,

with full SF6 gas insulation, which can be used to configure different secondary distribution configurations in medium voltage up to 40.5 kV [1].

1.1 Models

Unifunctional switchgear Function

cgm.3-l Feeder

cgm.3-s Busbar switch

cgm.3-s-pt Busbar switch with earth connection on the right (-ptd) or on the left (-pti)

cgm.3-p Fuse protection

cgm.3-v Vacuum circuit-breaker

cgm.3-rb Busbar rise

cgm.3-rc / -r2c Cable/double cable rise

cgm.3-m Metering

Multifunctional switchgear Functions

cgm.3-2lp 2 feeder functions and 1 fuse protection

cgm.3-2lv 2 feeder functions and 1 vacuum circuit-breaker

[1] Further information at www.ormazabal.com.

General descriptionGeneral Instructions

IG-136-EN version 10; 23/06/2016


1.2 Standards applied

Standard Description

IEC 62271-1 Common specifications for high-voltage switchgear and controlgear standards.

IEC 62271-100 High-voltage alternating current circuit-breakers.

IEC 62271-102 Alternating current disconnectors and earthing switches.

IEC 62271-103 High-voltage switches for rated voltages above 1 kV up to and including 52 kV.

IEC 62271-105 Alternating current switch-fuse combinations.

IEC 62271-200 Alternating current metal-enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV.

IEC 62271-206 / IEC 61243-5 Voltage presence indicating systems.

IEC 60529 Protection grades for enclosures.

IEC 60282-1 Current-limiting fuses.

1.3 Main components

Figure 1.1 Main elements of cgm.3 cubicles

1. Gas tank1.1. Side connection female bushings

2. Driving mechanism area2.1.Name plate2.2.Operating sequence plate2.3. Driving shafts (see mimic diagram of each model).2.4. ekor.vpis / ekor.ivds* Voltage presence detection unit2.5. ekor.sas* acoustic earthing prevention alarm unit.

3. Base3.1 Cable compartment access cover3.2 Medium-voltage cable fastening support3.3.Gas relief compartment3.4.Earth collector3.5 Front cable connection bushings

* Optional elements.


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1.3.1 Gas tank

Sealed compartment which houses the busbar and the switching and breaking elements, where the insulating medium is SF6.

Each gas tank has a pressure relief device to facilitate gas relief in the event of internal arc.

Thanks to the hermetically-sealed nature of the gas tank containing all the medium voltage elements, the equipment is expected to have a minimum service life of 30 years, without replenishing the gas, in accordance with Standard IEC 62271-1.

Figure 1.2 Gas tank for cgm.3-l

1.3.2 Driving mechanism compartment

This is the compartment in which the switch-disconnector, earthing switch or circuit-breaker is driven, depending on the type of function.

The mimic diagram for the main medium voltage circuit is displayed on the cover of this compartment.

The mimic diagram includes all the position indicators for the driving elements.

The cgm.3 system has, in line with the cubicle model, the following types of driving mechanism:

B Tilting l, s, s-pt, rb-pt, v, 2lp, 2lv

BM Motorised tilting l, s, s-pt, 2lp, 2lv

BR-A Accumulation of energy with latch p, 2lp

BR-AM Accumulation of energy with motorised latch l, p, 2lp

AV Circuit-breaker without reclosing v, 2lv

AMV Motorised circuit-breaker without reclosing v, 2lv

RAV Circuit-breaker with reclosing option v, 2lv

RAMV Motorised circuit-breaker with reclosing option v, 2lv

These elements are operated independently, i.e., their actuation speed does not depend on the speed of the manual operation.

The B, BM, BR, AR and BR-AM driving mechanisms can be replaced by upgrading in any of the three possible

positions (closed – opened – earth). Whilst the driving mechanism is withdrawn, these positions of the switch can be blocked using a coupling device, whether in service or not.


IG-136-EN version 10; 23/06/2016


1.3.3 Base

Made up of the cable compartment and the gas relief compartment:

Cable compartment

This is located in the lower front section of the cubicle and has a cover interlocked with the earthing switch, thus allowing front access to the medium voltage cables.

As standard, designed to contain up to:

• Two shielded screw-in terminals (reduced) per phase or one terminal (reduced) plus surge arrester (reduced) with space for the corresponding incoming power cables.

• Cable ties for the power cables.• Earthing bars.

As an option:

• Two symmetric terminals or symmetric terminal plus symmetric surge arrester.

• Metallic voltage transformers.

Figure 1.3 Cable compartment

Gas relief compartment

The cgm.3 system by Ormazabal is designed and constructed to withstand at least the thermal and dynamic effects of an arc of 16 kA for 0.5 seconds should a defect result in an internal arc in the gas compartment. The system conducts the gases generated in a fully controlled manner to avoid any possible injury to people in the equipment operation area.

Optionally, a chimney can be positioned in the rear of the cubicle to redirect the gases to the top section. Please check with Ormazabal.


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1.3.4 Name plate

Every unit includes a name plate, with some of the following data:

Figure 1.4 Example of name plate

Name plate

Nº Cubicle serial number(*)

Type Cubicle system Ormazabal

Designation Cubicle model

Standard Standards applied to the equipment

Name Equipment name

Ur Equipment rated voltage (kV)

Up Lightning impulse withstand voltage (kV)

Ud Industrial frequency withstand voltage (kV)

fr Equipment rated frequency (Hz)

Ir Equipment rated current (A)

Instructions Manual General Instructions Manual (IG) for the system

Class Driving mechanism class according to IEC 62271-103

N Number of mainly active load breaking operations

Ik / Ip Short-time withstand current/Short-time withstand peak value

tk Short-time withstand current time

Pre Gas pressure inside the tank (MPa)

Pme Minimum operating gas pressure (MPa)

SF6 Weight of insulating fluid (g)

Year Year of manufacture

TC Minimum working temperature

IAC Classification of internal arc

(*) In the event of incident, this number should be reported to Ormazabal.


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1.4 Characteristics table

Rated voltage [kV] 36 38.5 40.5Frequency [Hz] 50 / 60

Rated current [A]

Busbars and cubicle interconnection 400 / 630 630

Feeder 400 / 630 630

Output to transformer 200 200

Rated short-term withstand current [kA]

With tk= (x) s 16 / 20* (1 / 3 s)25 (1 s)

20* (1 / 3 s)25 (1 s)

Peak value 40 / 52* / 62.5 52* / 62.5

Rated insulation level [kV]

Industrial frequency rated withstand voltage (1 min) 70 / 80 80 / 90 95 / 118

Lightning impulse rated withstand voltage 170 / 195 180 / 210 185 / 215

Internal arc in tank

Front accessibility 16 / 20* kA (0.5 s) 20* kA (0.5 s)

Front and side accessibility 16 / 20* / 25 kA (1 s) 20* / 25 kA (1 s)

Front, side and rear accessibility*** 16 / 20* / 25 kA (1 s) 20* / 25 kA (1 s)

Internal arc classification in accordance with IEC 62271-200

IAC AF/AFL 16 / 20* / 25 kA (1 s) 20* / 25 kA (1 s)

IAC AFLR 16 / 20* / 25 kA (1 s) 20* / 25 kA 1 s

Protection grade: Gas tank IP X8

Protection grade: External enclosure IP 2XD

Standard unit colour [RAL] grey 7035 / blue 5005

Category of loss of service continuity [LSC] LSC2

Compartmenting class PM

(*) Tests conducted with current 21 kA/54.6 kA

(**) With gas exhaust upwards via the chimney

The values set out in this table are general for the cgm.3 system and are only valid once confirmed by Ormazabal. Some cubicle models can withstand partial values. For more detailed information, check the table for each cubicle model in the CA-112 catalogue by Ormazabal.


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1.5 Dimensions and weights

Figure 1.5 Dimensions cgm.3

Cubicle Width (a) [mm]

Depth (f) [mm]

Height (h) [mm]

Bushings height (g) [mm]

Cable fastening height (l)

[mm]

Weight [kg]

-l 418 850[1]1400 697 234 147

1745 1042 580 162

-s 418 850 1745 - - 143

-s-pt 600 850 1745 - - 185

-p 480 10101400

180 - 128 2151745

-v 600[2] 8501400 350 20 240

1745 695 282 255

-rci-rcd

367 831 1745 1590 1087 42

-r2c 550 831 1745 1590 1087 65

-rb-rb-pt

418 850[1] 1745 1042 580 158

-m1100

1160 1950 - -258

900 300

-2lp 1316 1010[1]1400

-l -p -l -p460

697 180 234 - 128

1745 1042 525 580 234 490

-2lv 1436 850 1745-l -v -l -v

5471042 695 580 282

[1] In the case of double symmetrical terminal, the Switchgear is an extra 80 mm deep.[2] As an option, there is also available a 595 mm wide model of the cgm.3-v cubicle. Please check with Ormazabal.


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1.6 Operating conditions

Installation Indoor

Maximum ambient temperature + 40 ºC

Minimum ambient temperature – 5 ºC / - 30 ºC (a)

Maximum mean ambient temperature, measured over a 24-hour period + 35 ºC

Maximum mean relative humidity, measured over a 24-hour period < 95%

Maximum mean relative humidity, measured over a 1-month period < 90%

Maximum mean vapour pressure, measured over a 24-hour period 2.2 kPa

Maximum mean vapour pressure, measured over a 1-month period 1.8 kPa

Maximum height above sea level 2000 m

Solar radiation Negligible

Ambient air pollution (dust, smoke, corrosive and/or flammable gases, vapours or salt) Insignificant (b)

Vibrations caused by causes external to the switchgear or by seismic movements Insignificant(a) 1000 m for metering function and non-shielded connectors. For higher installation altitudes, check with Ormazabal.(b) Unless indicated otherwise, It is assumed that there are no specific user requirements.

The specifications refer to the section "Normal service conditions for indoor cubicles" in Standard IEC 62271-1 "Common specifications for high-voltage cubicles".For special service conditions: ambient temperature above + 40 ºC, installation over 2000 m above sea level, significant pollution level, or others different to those described, check with Ormazabal.

General instructionsHandling and transport

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2 Handling and transport

Important: During transport, the switchgear must be perfectly seated and fixed so that it cannot move about and possibly damage the equipment.

2.1 Lifting means

The switchgear must always be kept upright, directly on the ground or on a pallet depending on the type of handling involved.

To handle assemblies of up to 4 cgm.3 functional units, one of the following methods must be used:

1. Using a forklift truck or pallet-jack[5].

Figure 2.1 Lifting a cgm.3 modular cubicle using a fork-lift truck.

2. Lifting using slings or chains fixed to the lifting supports on the sides of the top of the cubicle. The angle of pull should be as vertical as possible (with an angle greater than 60º from the horizontal).

Figure 2.2 Lifting a cgm.3 modular cubicle with chains.

3. If it is not possible to use the aforementioned methods, rollers may be used underneath the switchgear. Another option is to slide the cubicles over rods (these same rods can be used to help get over the cable trench).

4. To handle sets of 5 functional cgm.3 units (consisting of either coupled modules or compact assemblies associated with modules), use lifting systems (slings, lifting beam, etc.) with a pull angle greater than 65º and less than 115º in order to prevent possible damage to the cubicles during hoisting.

[5] Position the rear of the cubicle facing the driver, to avoid damaging the front.

Handling and transportGeneral instructions

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Figure 2.3 Lifting a cgm.3 assembly with 5 functional units.

Figure 2.4 Lifting a cgm.3 assembly with a forklift truck.

The use of lifting beams is required for cubicle assemblies with control boxes. As the sole exception, slings may be used if the cubicles of the assembly have identical height control boxes installed.

General instructionsStorage

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3 Storage

If it needs to be stored, the equipment must be placed on dry ground or on top of damp-proof insulating material, still in its original packaging.

After prolonged storage, clean all the insulating parts carefully before commissioning the equipment. The enclosure should be cleaned with a clean, dry lint-free cloth.

Storage must always be INDOORS, with the following conditions recommended:

1. Ambient air temperature should not exceed 40 ºC and its mean value, measured in a period of 24 hours, should not exceed 35 ºC.

2. The ambient air temperature should not drop below - 5 ºC. There are also cubicles with storage temperature up to - 40 ºC.

3. The switchgear must be protected from direct solar radiation.

4. Altitude, both in transport and in storage, must not exceed 2000 m.

5. The environmental air must not have any significant contamination from dust, smoke, corrosive and/or inflammable gases, vapours or salt.

6. The switchgear must be protected from the rain, and the humidity conditions should be as follows:

a) the mean relative humidity value, measured over a period of 24 hours, must not exceed 95%.

b) the mean water steam pressure value, measured in a period of 24 hours, must not exceed 2.2 kPa.

c) the mean relative humidity value, measured over a period of one month, must not exceed 90%.

d) the mean water steam pressure value, measured in a period of one month, must not exceed 1.8 kPa.

7. During transport, vibrations caused by external factors or seismic movements must be insignificant.

Any other conditions must be made known beforehand, since the equipmentmust be factory-set at atmospheric pressure in the final destination.Otherwise the gauge may show an erroneous reading, even thoughthe unit's interior pressure value is correct.

InstallationGeneral instructions

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4 Installation

4.1 Unpacking the equipment

The switchgear of the cgm.3 system is supplied protected in plastic as standard.

On receiving the equipment, check that the goods supplied correspond to the order and associated documentation. If this is not the case, contact Ormazabal immediately.

The disassembly process for the equipment is as follows:

1. Using a blade, cutter or similar tool, cut the cellophane the cubicle is wrapped in [6].

2. Completely remove the cellophane.

3. Detach the white polystyrene corner pieces.

4. Unscrew the fixings between the base and the pallet.

5. Remove the pallet, handling the cubicle as indicated in section 2.1.

6. Unpack the accessory box located at the rear or on top of the cubicle.

7. Remove the self-adhesive protective plastic from the cable compartment cover.

The self-adhesive plastic must be removed from the cable compartment cover so that the equipment enclosure's earth connection may have the proper electrical continuity.

8. Dispose of any waste in an environmentally-friendly manner.

It is advisable to make a visual inspection of the equipment to check whether it has suffered any damage in transit. If damaged, contact Ormazabal immediately.

4.2 Location of accessories during transport

A number of accessories are supplied with the cubicles, located as indicated in the figures below:

Figure 4.1 Location of accessories in cgm.3-p cubicles

[6] It is advisable to cut the cellophane at the rear of the cubicle or at the corner to avoid scratching the surface.

General instructionsInstallation

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Figure 4.2 Location of accessories in cgm.3-l and cgm.3-v cubicles

Depending on the cubicle model, the accessory box contains some of the following items:

• General Instructions Document IG-136 by Ormazabal.

• Driving lever• Spring charge lever• Cubicle connecting kit:

- ormalink - Springs - Syntheso grease - Earthing bar

• End plug kit: - Cubicle end assembly - Nylon thread - Plastic plugs - Side cover

• Floor fastening assembly

4.3 Minimum installation distances

The minimum distances to the walls and ceiling which must be maintained in the installation are as follows:

Figure 4.3 Minimum installation distances

Minimum distances [mm]Side wall (a) 100

Roof (b)Height 1400 mm 600

Height 1745 mm 550

Front clearance (c) 500 (*)

Function Rear wall (d)cgm.3-l / -s / -v / -2lv / -rb / -rc 100 / 160(***)

cgm.3-p / -2lp 0

cgm.3-m without IAC classification 0

cgm.3-m with IAC classification 100 / 150(****)

(*) An operating clearance of at least 1000 mm is recommended.(**) Cubicles with classification IAC AFLR: d = 800 mm.(***) Diagrams combined with p and 2lp cubicles.(****) For classification IAC 21 kA – 1 s.

The measurements indicated in the table have been obtained in accordance with the dimensions of the test room for the gas insulated modules, in accordance with Annex AA of Standard IEC 62271-200.

The space required to extend the assembly with an additional cubicle is 250 mm plus the width of the new cubicle [7].

[7] For any doubts, please ask Ormazabal.


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4.4 Recommended cable connection trench

Minimum recommended dimensions based on the trench dimensions used in the tests in accordance with Standard

IEC 62271-200. In accordance with the radius of curvature of the cables used, these dimensions may vary[10].

4.4.1 Cubicles with internal arc in gas tank [8] up to 20 kA[9] - 0.5 s

Feeder function, busbar rise and cable rise

The dimensions of the trench depend on the minimum radius of curvature of the cables used.

Front and rear cable input or output

(D1)Side cable input or

output (D2)

Figure 4.4 Dimensions [mm] of the cable trench for cgm.3-l, cgm.3-rb and cgm.3-rc

Trench necessary for the feeder, busbar rise and cable rise functionCable data

Approximate radius of curvature*

[mm]

Minimum depth

Cable insulation Cable type Cable section [mm2]

Cable diameter[mm] D1 [mm] D2 [mm]

Dry insulationSingle-core 18/30 kV

< 150 41 555 200 500

185 43 590 200 550

240 45.2 640

300 47.5 685300 660

400 48 745

3-core 18/30 kV < 150 92.7 805 650 650

(*) Check against the data of the manufacturer of the cable used.

[9] Tests conducted with a current of 21 kA.[10] In each case, bear in mind which cable is to be used in that particular installation.


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Fuse protection function

Figure 4.5 Dimensions [mm] of the cable trench for cgm.3-p

Front and rear cable input or output (D1)Side cable input or output (D2)

Trench necessary for the fuse protection functionCable data


[mm]

Minimum depth




< 50 35 430 500 500

70 36.5 460550 550

95 38 500

150 41 555 600 600

3-core 18/30 kV < 95 86 735 1050 1050



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Circuit-breaker function with AV / RAV driving mechanism

Figure 4.6 Dimensions [mm] of the cable trench for cgm.3-v with AV / RAV driving mechanism.


Trench necessary for the circuit-breaker function with AV / RAV driving mechanism Cable data


[mm]

Minimum depth




<150 (**) 41 555 400 400

185 43 590400 500

240 45.2 640

300 47.5 685500 600

400 48 745

3-core 18/30 kV < 150 92.7 805 850 850

(*) Check against the data of the manufacturer of the cable used.(**) 150 mm2 cable only valid up to 21 kA.


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4.4.2 Cubicles with classification of internal arc IAC up to 25 kA - 1 s

Feeder function, busbar rise and cable rise

Front and rearcable input or output

(D1)Side cable input or

output (D2)

Figure 4.7 Dimensions [mm] of the cable trench for cgm.3-l, cgm.3-rb and cgm.3-rc

Trench necessary for the feeder, busbar rise and cable rise functionCable data


[mm]

Minimum depth



Hei

ght 1

400

mm

(***

)


< 150 (**) 41 555 500 800

185 43 590550 900

240 45.2 640

300 47.5 685650 1000

400 48 745

3-core 18/30 kV < 150 92.7 805 950 950

Hei

ght 1

745

mm


< 150 (**) 41 555 370 500

185 43 590370 550

240 45.2 640

300 47.5 685370 660

400 48 745

3-core 18/30 kV < 150 92.7 805 650 650

(*) Check against the data of the manufacturer of the cable used.(**) 150 mm2 cable only valid up to 21 kA.(***) Exclusively for cgm.3-l and cgm.3-2lp cubicles.

[11] In each case, bear in mind which cable is to be used in that installation.


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Fuse protection function

Figure 4.8 Dimensions [mm] of the cable trench for cgm.3-p.


Trench necessary for the fuse protection functionCable data


[mm]

Minimum depth



Hei

ght 1

400

mm


< 50 35 430 800 800

70 36.5 460900 900

95 38 500

150 41 555 950 950

3-core 18/30 kV < 95 86 735 1400 1400

Hei

ght 1

745

mm


< 50 35 430 500 500

70 36.5 460550 550

95 38 500

150 41 555 600 600

3-core 18/30 kV < 95 86 735 1050 1050



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Circuit-breaker function with AV / RAV driving mechanism

Figure 4.9 Dimensions [mm] of the cable trench for cgm.3-v with AV / RAV driving mechanism.


Trench necessary for the circuit-breaker function with AV / RAV driving mechanismCable data


[mm]

Minimum depth



Hei

ght 1

400

mm

(***

)


< 150 (**) 41 555 750 750

185 43 590800 800

240 45.2 640

300 47.5 685850 900

400 48 745

3-core 18/30 kV < 150 92.7 805 1200 1200

Hei

ght 1

745

mm


< 150 (**) 41 555 400 400

185 43 590400 500

240 45.2 640

300 47.5 685500 600

400 48 745

3-core 18/30 kV < 150 92.7 805 850 850

(*) Check against the data of the manufacturer of the cable used.(**) 150 mm2 cable only valid up to 21 kA.(***) Exclusively for cgm.3-v cubicles .


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Metering function

Figure 4.10 Dimensions [mm] of the cable trench for cgm.3-m.

Trench necessary for the metering function

Cable insulation Cable type Cable section[mm2]

Cable diameter[mm]


[mm]

Depthminimum D2

Dry insulation Single-core 18/30 kV

< 150 41 555 600

185 43 590 650

240 45.2 640 700

300 47.5 685 750

400 48 745 800



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4.5 Fastening to the floor

Before assembling the cubicles, the floor must be carefully levelled to prevent any deformation which may make it difficult to connect the cubicles to one another.

The cubicles can be fastened to the floor in two ways:

4.5.1 Fastening to the floor on profile

If the floor of the facility is not sufficiently uniform, it is advisable to install the medium voltage cubicles on an auxiliary profile, to make it easier to connect. This profile, which can be supplied to order, must be anchored to the floor using expansion screws.

A Screw M10x25

B 65 x 65 x 4 mm profile

C Anchoring support

Figure 4.11 Fastening cubicles on profile

4.5.2 Fastening to the floor by anchoring

If the floor of the installation is level enough, it is advisable to install the medium voltage cubicle anchored directly to the floor.

The sequence for anchoring the cubicles to the floor is as follows:

1. The cubicle's switch must be in the earthing position[13].

By default, the cubicles are supplied with the switch in earthing position. Except in circuit breaker functions, which will be in disconnected position.

2. Remove the cable compartment cover, using the central handle on the cover to pull it up and forward.

[13] See section 5. Operations sequence


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Figure 4.12 Removing the cable compartment cover

3. Anchor the first cubicle to the floor of the installation using M10 bolts at the points prepared in its base. This will prevent displacements or vibrations due to causes such as short-circuiting, flooding, etc. The following levels and figures should be taken into account:

Anchoring dimensions [mm]

Module a b c d ef

gInternal arc 0.5 s Internal arc 1 s

l 50 368 245 - - 540 710 -

s 50 368 - - - 540 710 -

s-pt 50 550 - - - 540 710 -

p 50 430 60 - - 540 710 -

v 50 550 325 - - 540 710 -

rb 50 368 245 - - 540 710 -

rb-pt 50 368 245 - - 540 710 -

m 35 1030* 235 - - 1030 1030 -

rc 50 317 435 - - 540 710-rci 209

-rcd 158

2lp 50 368 245 430 418 540 710 60

2lv 50 550 325 418 - - 710 60

(*) Separation between anchors for 1100 mm wide cubicles; separation of 830 mm for 900 mm wide cubicles.

Figure 4.13 Anchoring points in cgm.3. -l, -s, -s-pt, -p,-v, -rb, -rb-pt cubicles of 1745 mm high

Figure 4.14 Anchoring points in cgm.3 -l, -p, -v cubicles of 1400 mm high


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Figure 4.15 Anchoring points in cgm.3. -l, -s, -s-pt, -p, -v, -rb,-rb-pt double cable cubicles of 1745 mm high

Figure 4.16 Anchoring points in cgm.3-rc cubicles.

Figure 4.17 Anchoring points in cgm.3-m cubicles.

Figure 4.18 Detail of anchor points in cgm.3-2lp cubicles 1745 mm high

Figure 4.19 Detail of anchor points in cgm.3-2lp double cable cubicles 1745 mm high

Figure 4.20 Detail of anchor points in cgm.3-2lp cubicles 1400 mm high


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Figure 4.21 Anchoring points in cgm.3-2lv cubicles.

4.6 Connecting the cubicles

The joining of cubicles must be carried out as indicated in Ormazabal's RA-163 Spares and Accessories document,

which is supplied with the materials kit used for connecting cubicles.

4.7 Earthing the switchgear

When connecting the general earth collector, follow the figure below.

Figure 4.22 Equipment earthing

1. Bolt the earth strip between every 2 medium voltage cubicles, in the rear section, using 2 hexagonal M8 x 20 bolts. Apply a torque of 15 Nm.

Tools:13 mm spannerTorque wrench with 13 mm adapter

2. Connect the end earthing bar, marked with the symbol , to the general earth connection of the installation.

Earthing the equipment is an essential condition for safety.


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4.8 Cable connections

The medium voltage incoming and outgoing feeders are linked to the transformer or, occasionally, other cubicles via cables. The joints of these cables to the corresponding female bushing in the cubicles of the cgm.3 system can be either using simple connection terminals (plug-in) or reinforced terminals (screw-in), type IEC or IEEE-386 compliant[*].

The cable compartment contains the connecting cable bushings for the incoming and outgoing feeders, as well as for the outgoing feeders to the transformer.

The cable compartment is sized to allow the use of both insulated and partially insulated terminals[9].

Never touch live connectors, not even screened connectors. Screening does not constitute a protection against direct contact.When the equipment is in service and a reserve cubicle is left with voltage in the upper busbar and without the cables in the lower bushings, insulating plugs must be placed in the bushings (EUROMOLD type) or close the earthing switch and lock that position with a padlock.

The terminals recommended for networks with Ur = 36 kV are detailed below.

Cable Type

Rated current [A]

Manufacturer Connector36 kV

Connector type Section [mm2]

Insulationdry

400EUROMOLD(*) Screened

M400LR 35-240630 M400TB 35-240630 M400TB 18-630

(*) Connectors recommended for the cgm.3 system by Ormazabal.

Apart from the list above, CENELEC terminals are also valid. For other values, consult Ormazabal.

4.8.1 Horizontal front connection

1. Close the earthing switch.

2. Remove the cover to access the cable compartment.

Figure 4.23 Cable compartment detail

[9] It is advisable to use fully insulated connectors for voltages of 36 and 40.5 kV, according to HD 629.

[*] In accordance with figure 13 of Standard IEEE 386: “600 A Dead-break interface No. 1, 21.1 kV”


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3. Connect the terminals on the front bushings and secure the cables using the cable support and clamp.

The clamp has two positions, depending on the cable diameter.

Specific cable supports should be used for cable diameters above 49 mm. Please check with Ormazabal.

Figure 4.24 Terminal connection detail

4. Connect the terminal earth braids, if applicable, and the cable screens.

Figure 4.25 Horizontal front connection process

5. Put the cable compartment cover back in place.

4.8.2 Cable connection in fuse protection function 1400 mm high

The cable support in fuse protection functions, measuring 1400 high, is supplied secured to the base with two M8 screws and nuts, as shown in Figure 4.26

Figure 4.26 Cable support in transport position


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Once the cubicle is secured to the floor and the medium voltage cables are connected, carry out the following operations to place it in installation position:

1. Release the four screws indicated in Figure 4.27

Figure 4.27 Cable support fastening points

2. Turn the cable support and position it as shown in Figure 4.28

Figure 4.28 Cable support positioning

3. Position the four M8 screws with their nuts and fasten until tight.

The cable support is underneath level zero, as shown in Figure 4.29, prepared for front cable connection:

Figure 4.29 Cable support in cable connection position


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4.9 Assembly and connection of measuring transformers in cgm.3-m

The medium voltage and current transformers are housed in tracks installed in the cgm.3-m metering modular cubicle by Ormazabal.

The layout and connection of these transformers (maximum three voltage transformers and three current transformers per metering cubicle) will correspond to the order configuration and the type of transformers to be installed.

For further information on the installation and connection of cgm.3-m metering transformers by Ormazabal, check the operations manual MO-082 “Installation of transformers and busbars in metering cubicles”.

General instructionsRecommended sequence of operations

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5 Recommended sequence of operations

Before carrying out any operation when voltage is present, we recommend checking the SF6 gas pressure using the pressure gauge.

5.1 Checking the gas pressure

Each tank has a pressure gauge for checking the gas pressure, which can easily be seen from outside the cubicle. The pressure gauge scale is divided into different colours: red, grey and green. For safe operation, the needle must be in the green area of the corresponding temperature band.

Figure 5.1 Pressure gauge

5.2 Voltage presence indicator

Ormazabal has two voltage presence indication options:

• The ekor.vpis unit for detecting voltage, designed in accordance with Standard IEC 62271-206. Therefore, the “voltage presence” indication is displayed when the phase-earth voltage is equal to or greater than 45% of the rated voltage and is not visible when the phase-earth voltage is less than 10% of the rated voltage.

• The ekor.ivds unit for detecting voltage is designed in accordance with Standard IEC 61243-5. Therefore, the “voltage presence” detection is displayed when the phase-earth voltage is between 45% and 120% of the rated voltage and is not visible when the phase-earth voltage is less than 10% of the rated voltage.

Both units provide a clear visual indication for the user, without needing an auxiliary power supply for its operation.

For each of the three phases, the presence of voltage is indicated by intermittent flashing of the indicators.

The voltage detection unit has the following displays:

1. L1, L2, L3 signal each of the indicator phases. The numbering corresponds to the order of the phases, from left to right, seen from the front of the cubicle. Each phase has a test point for checking the phase balance between cubicles.

2. Voltage presence indicator. The flashing light indicates the presence of voltage in this phase.

Recommended sequence of operationsGeneral instructions

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3. Phase test points. Each phase has a test point for checking the phase balance between cubicles.

4. Earth test point. This is only used for comparing the phases.

Figure 5.2 Voltage presence indication unit

The purpose of the test points for the three phases and earth is to make it easier to check the phase balance[16] between cubicles. Specific phase comparator ekor.spc by Ormazabal can be used to do this.

With the ekor.vpis, if the indicators do not light up, use other means to check that there is no voltage.

5.3 Phase balance check

The ekor.spc[17] phase comparator by Ormazabal should be used for checking that the medium voltage cables are correctly connected to the feeder cubicles.

Firstly, connect the red cables of the ekor.spc unit to the corresponding phase test points in the voltage indication units[18], and the black cable to the earth test point. This operation must be repeated for all the phases: L1, L2 and L3

Figure 5.3 Detail of ekor.spc

Figure 5.4 Detail of ekor.spc

[16] See section 5.3 “Phase balance check”[17] Optionally, other comparison devices which comply with Standard IEC 62271-206 may be used.[18] See section 5.2. “Voltage presence indicator” of these General Instructions.


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Comparison of balanced phases

Figure 5.5 There is NO indication in the comparator.

Comparison of unbalanced phases

Figure 5.6 YES, there is indication on the comparator

5.4 Feeder function

5.4.1 Mimic diagram

a ekor.sas, acoustic earthing prevention alarm

b Pressure gauge window

c Voltage presence indicator ekor.vpis or ekor.ivds

dOperation area:

• GREY for switch-disconnector• YELLOW for earthing switch

eStatus indicators

• BLACK for switch-disconnector• RED for earthing switch

f Driving shaft access handles

Figure 5.7 Mimic diagram of cgm.3. -l


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5.4.2 Driving levers

The driving levers to be used to operate the switch – disconnector – earthing switch of the feeder function with B or BM driving mechanisms is:

Figure 5.8 B, BM driving mechanism lever

5.4.3 Opening operation from earthing position

1. Move the driving shaft access handle in the yellow zone to its lower position.

2. Insert the lever in the earthing switch driving shaft, move the driving arm to the end and turn anti-clockwise 90º.

Figure 5.9 Lever turn process

3. Verify that the cubicle is in disconnected position.

Figure 5.10 Earthing switch open


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5.4.4 Switch closing operation from the disconnected position

1. Move the driving shaft access handle in the grey zone to its lower position.

2. Connection operation:

a) Manual operation (B driving mechanism). Insert the lever in the switch access (grey area), move the driving arm to the end and turn clockwise 90º.


b) Motorised operation (BM driving mechanism). Activate the corresponding operation command.

When, for any reason, the motor stops halfway through a motorised operation, before restarting it you must finish the operation manually, so that the whole mechanism: sensors, controllers, etc., are in a reliable, effective and logical position for the control system of the motorised unit when it is switched back on.

3. Verify that the cubicle is in closed position.

Figure 5.12 Switch-disconnector closed


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5.4.5 Opening operation from closed position


2. Disconnecting operation:

a) Manual operation (B driving mechanism). Insert the lever in the switch access (grey area), move the driving arm to the end and turn anti-clockwise 90º.





Figure 5.14 Switch-disconnector open


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5.4.6 Earthing operation from the disconnected position


2. Insert the lever in the earthing switch driving shaft, move the driving arm to the end and turn clockwise 90º.


3. Verify that the cubicle is in earthing position.

Figure 5.16 Earthing switch closed

5.4.7 Cable test

These driving mechanisms allow the operation of going from earthing switch closed to switch-disconnector open, even when the cable compartment cover is open. Thus, the switch-disconnector cannot be changed to the closed position until this cover has been put back.The cable test can only be carried out in cgm.3 feeder functions which include driving mechanisms B/BM with this characteristic. Please check with Ormazabal.

1. Follow the steps in section “5.4.6 Earthing operation from the disconnected position”

2. Leave the lever in the earthing switch access (yellow area)

3. Open the lower cover to access the cable compartment

4. With the lever in the earthing switch access, follow the steps in section “5.4.3 Opening operation from earthing position”

5. Carry out the cable test

6. To return to earth position, follow the steps in section “5.4.6 Earthing operation from the disconnected position”

7. Close the lower cover to access the cable compartment


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5.5 Busbar switch function

5.5.1 Mimic diagram

a Pressure gauge window

b Operation area: • GREY for switch-disconnector

c Status indicator• BLACK for switch-disconnector

d Driving shaft access handle

Figure 5.17 Mimic diagram cubicle cgm.3-s

5.5.2 Driving lever

The driving lever to be used to operate the switch – disconnector of the busbar switch function with B or BM driving mechanisms is:



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5.5.3 Switch closing operation from the disconnected position

1. Move the driving shaft access handle to its lower position.









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3. Verify that the cubicle is in disconnection position.



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5.6 Busbar switch function with earth connection

5.6.1 Mimic diagram



c ekor.sas, acoustic earthing prevention alarm

dOperation area:

• GREY for switch-disconnector• YELLOW for earthing switch

eStatus indicator

• BLACK for switch-disconnector• RED for earthing switch


Figure 5.23 Mimic diagram cubicle cgmcosmos-s-pti

5.6.2 Driving lever

The driving lever to be used to operate the switch – disconnector – earthing switch of the feeder function with B or BM driving mechanisms is:



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5.6.4 Connection of the switch-disconnector from the disconnected position















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5.6.6 Earthing operation from open position


a) Insert the lever in the earthing switch driving shaft, move the driving arm to the end and turn clockwise 90º.





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5.7 Busbar rise function with earth connection

5.7.1 Mimic diagram


c Voltage indicator ekor.vpis or ekor.ivds

d Operation area:• YELLOW for earthing switch

e Status indicators• RED for earthing switch


Figure 5.33 Mimic diagram cubicle cgm.3-rb-pt

5.7.2 Driving levers

The driving lever to be used to operate the earthing switch of the busbar riser function with earthing with B driving mechanisms is:

Figure 5.34 B driving mechanism lever


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5.7.3 Earthing switch disconnection




3. Verify that the cubicle is in earthing open position.


5.7.4 Earthing switch connection





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3. Verify that the cubicle is in earthing closed position.



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5.8 Fuse protection function

5.8.1 Mimic diagram



c Voltage indicator ekor.vpis or ekor.ivds

dOperation area:

• YELLOW for earthing switch• GREY for switch-disconnector.

eStatus indicators

• BLACK for switch-disconnector.• RED for earthing switch


g Manual trip operation

hFuse status indicator:green: normalred: fuse blown

i Spring charge indicator

Figure 5.39 Mimic diagram cubicle cgmcosmos-p

5.8.2 Driving lever

The driving lever to be used to operate the switch – disconnector – earthing switch of the protection with fuses function with BR-A driving mechanisms is:

Figure 5.40 BR-A driving mechanism lever


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2. Insert the lever in the earthing switch driving shaft, move the drive arm to the end and press inwards on the head of the lever with one hand, and turn 90º anticlockwise with the other hand.




5.8.4 Spring charge operation and closing of the switch - disconnector from disconnected position


2. Insert the lever in the switch-disconnector driving shaft, move the drive arm to the end and press inwards on the head of the lever with one hand, and turn clockwise with the other hand. In the same turn, the switch-disconnector is closed and the retaining springs are charged.

In the case of BR-AM motorised operation mechanism, closing and tensioning of springs can be carried out manually or motorised.



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5.8.5 Opening operation from the switch-disconnector closed position

1. The switch can be opened manually, using the push-button on the front of the cubicle, an opening coil, or due to action by the fuses.

Figure 5.45 Switch-disconnector manual trip drive




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5.8.6 Earthing operation from the open position


2. Insert the lever in the earthing switch driving shaft, move the drive arm to the end and press inwards on the head of the lever with one hand, and turn 90º clockwise with the other hand.




5.9 Fuse replacement sequence

To access the fuse holders, first remove the cable compartment cover. It is essential to close the earthing switch. If any of the 3 fuses blows, the switch-disconnector (a) will open automatically; this is indicated by the red position indicator (b) located on the front of the driving mechanism compartment.

Figure 5.49 Fuse blow trip indication


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As an option, an auxiliary blown fuse indication for any of the three fuses is also available. More precisely, it consists of a normally open contact and a normally closed contact (1NO + 1NC) for auxiliary circuits such as an illuminated indication showing that any of the fuses has blown.

In order to replace the fuses, the following procedures must be followed:

1. Close the earthing switch (c).

2. Remove the cable and fuse compartment access cover by pulling the handle (d) up.

Figure 5.50 Cable and fuse compartment cover opening

3. Pull up the handle on the fuse holder cover until the locking clip is unhooked and then pull sharply outwards to open the fuse holder.

Figure 5.51 Fuse-holder opening

4. Remove the fuse holder carriage by pulling it outward.

Figure 5.52 Removing the fuse holder carriage

5. Replace the blown fuse, taking special care with the striker as shown in the figure.

Figure 5.53 Replacing the medium voltage fuse

Make sure that the end of the new fuse with the striker faces the carriage insulator end. It is advisable to change all three fuses, even if only one of them appears to be damaged.

6. Insert the fuse holder carriage in its compartment by pulling it inward.

Figure 5.54 Inserting the fuse holder carriage


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Figure 5.55 Inserting the fuse holder carriage

Before inserting the fuse holder carriage in the fuse protection cubicle, ensure that both the carriage as well as the inside of the fuse holder are properly cleaned.

7. Reset the fuse striker by pressing downward with the thumb.

Figure 5.56 Resetting the striker in the fuse holder cover

8. Close the cover and check that all the strikers have been reset.

Figure 5.57 Closing the fuse holder

9. Place the fuse and cable compartment access cover (a) by pushing it downward and ensuring it is locked on the cgm.3-p cubicle, taking into account that the fuse status indicator (b) is green.

Figure 5.58 Closing the cable and fuse compartment cover in cgm.3-p

10. Start up the cubicle following the instructions set out in these General Instructions.


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5.9.1 Selection of recommended fuses

The fuses recommended for use in the fuse protection functional unit are defined according to tests carried out

by the manufacturers. The following table shows the recommended fuse ratings according to the Ur/Ptransf. ratio:

Ur [kV] Transformer rated power [kVA]

Network Cubicle 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000

Rated fuse current (A) IEC 60282-125 36 6.3 10 16 16 16 20 20 31.5 31.5 40 40 50 63 80*

30 36 6.3 6.3 10 16 16 16 20 20 31.5 31.5 40 40 63 63

35/36 40.5 6.3 6.3 10 16 16 16 20 20 31.5 31.5 40 40 50 63

Considerations:

• General operating conditions: without overload and temperature < 40 ºC.

• The values marked with an (*) correspond to SSK-type fuses.

• Recommended fuses: SIBA 20/36 kV, type HHD, medium type striker, for functional units up to 36 kV and SIBA HHD TB 40.5 kV, medium type striker, for functional units up to 40.5 kV (conforming to IEC 60282-1).

• For other makes and overcharge protection, check with Ormazabal.

• If any of the fuses blows, we recommend changing all three.

• Temperature-rise testing of the fuse switch assembly, according to IEC 62271-105.

Transfer currents according to IEC 62271-105:

The transfer currents have been tested in accordance with the following parameters:

Ur Fuse [kV] Ur Cubicle [kV]

Ir Fuse [A]

Itransfer

[A]

36 36 Type SSK 80 820

40.5 40.5 Type HHD 63 700


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5.10 Circuit-breaker function with AV / RAV driving mechanism

5.10.1 Mimic diagram


c Voltage presence indicator ekor.vpis or ekor.ivds

dOperation area:

YELLOW for earthing switchGREY for switch-disconnector.

e Protection unit ekor.rpg

f Status indicators

g Earthing switch driving shaft access handle.

j Spring charge indicator

k Circuit-breaker manual spring charge

m Operation counter

n Switch-disconnector driving shaft access handle

oCircuit-breaker operation area RED push-button for opening GREEN push-button for closing

Figure 5.59 Mimic diagram cubicle cgmcosmos-v

5.10.2 Spring charge and driving levers

The drive and spring charge levers to be used to drive the switch – disconnector – earthing switch of the circuit breaker function with AV/RAV driving mechanisms are:

Figure 5.60 Switch-disconnector driving lever

Figure 5.61 Spring charge lever


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Initial conditions: earthing switch closed and circuit breaker closed.

1. Move the access handle in the yellow zone to its lower position.

Figure 5.62 Earthing switch driving shaft access handle detail.

2. Insert the lever in the earthing driving shaft, move the driving arm to the end and turn anti-clockwise.

Figure 5.63 Lever turn details




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5.10.4 Closing operation from open position

Initial conditions: earthing switch open, circuit breaker closed and springs charged.

1. Open the circuit-breaker by pressing the "0" button on the front keypad and check the status indicator.

Figure 5.65 Opening button detail

2. Move the access handle in the grey zone to its lower position.

Figure 5.66 Switch-disconnector driving shaft access handle detail.

3. Insert the lever in the switch-disconnector driving shaft, move the drive arm to the end and turn clockwise.


4. Remove the lever. The handle returns to its original position.


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5. Charge the springs by introducing the spring charging lever in the spring charge shaft (k) and turn until the charged spring indicator changes state.

Manual driving mechanism (AV): Once the spring is charged, close the switch by pressing the close button; then check the status indicator and whether voltage is present in the ekor.vpis or ekor.ivds unit.

Motor driving mechanism (AMV): Close the switch by pressing the closing button; then check the status indicator and whether voltage is present in the ekor.vpis or ekor.ivds unit.

6. Close the circuit-breaker by pressing the "l" button and check the status indicator.

Figure 5.68 Closing button detail


Initial conditions: circuit breaker closed, earthing switch open and springs charged.

1. Open the circuit-breaker by pressing the "0" opening button and check the status indicator.

Figure 5.69 Opening button detail

2. Check there is no voltage through the ekor.vpis or ekor.ivds.

3. Move the access handle in the grey zone to its lower position.

Figure 5.70 Handle detail

4. Insert the lever in the disconnector driving shaft, move the driving arm to the end and turn anti-clockwise 90º.


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Figure 5.71 Lever turn detail

5. Remove the lever. The handle returns to its original position. Verify that the cubicle is in disconnected position.


5.10.6 Earthing Operation from the open position

Initial conditions: circuit breaker open, earthing switch open and springs charged.

1. Close the circuit-breaker by pressing the "l" close button and check the status indicator.

Figure 5.73 Closing button detail

2. Check that no voltage is present through the ekor.vpis unit.

3. Move the access handle in the yellow zone to its lower position.

Figure 5.74 Handle detail


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5. Remove the lever. The handle returns to its original position. Verify that the cubicle is in earthing position.


When undertaking work with the cubicle powered down, it is mandatory to interlock the earthing position with either a padlock or a safety lock.

General instructionsSafety elements

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6 Safety elements

6.1 Acoustic earthing prevention alarm

The ekor.sas acoustic alarm unit is associated to the ekor.vpis voltage presence indicator and to the earth shaft drive. The alarm is activated when there is voltage in the functional unit's medium voltage feeder and the lever is inserted in the earthing switch shaft. A sound then indicates that a short-circuit or zero voltage may occur in the network if the operation is carried out.

Operation of the unit is assured within the same operating range as the ekor.vpis unit associated with it[23].

Figure 6.1 ekor.sas unit

6.2 Interlocks

The switchgear is provided with safety locks, which ensure the following conditions:

1. The switch-disconnector and the earthing switch cannot both be in closed position at the same time.

2. The cubicles have a safety lock which prevents access to the medium voltage cable compartment while the earthing switch is not closed. In normal operation, this earthing switch cannot be opened if the cable compartment cover is not in place.

[23] Incompatible with use of ekor.ivds units.

Safety elementsGeneral instructions

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6.2.1 Locking with a padlock

The cubicles are supplied with independent padlock interlocking for both the switch-disconnector in closed or open positions and for the earthing switch in closed or open positions. Padlocks with ring diameters of between 8 and 11 mm can be used.

Figure 6.2 Locking detail in feeder functions by padlock

6.2.2 Locking with a lock

Both the switch-disconnector and the earthing switch can have an optional lock interlocking device, which allows its operation to be blocked in both open and closed positions.

Figure 6.3 Locking detail in feeder functions by locks

General instructionsMaintenance

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7 Maintenance

For safety reasons, maintenance operations performed directly on the driving mechanism must be performed WITHOUT any driving levers inserted.

The live parts of the main circuit and switching equipment do not require inspection or maintenance, as they are completely insulated in SF6, and therefore free from any influence from the external environment.

The operating mechanism for the cgm.3 system cubicles driving devices does not require lubrication for correct operation throughout its estimated lifetime, according to the service conditions specified in IEC 62271-1.

These mechanisms must be inspected when used under extreme conditions (dust, salt, pollution). It is advisable to carry out at least one operation during the inspections.

Components manufactured from galvanised sheet steel have been painted to ensure their resistance to corrosion. Any scratches, dents or similar on them must be repaired to prevent corrosion.

Facilities which operate under severe climate conditions, in excess of those defined as normal Service Conditions (IEC 62271-1), must carry out the regular preventive maintenance tasks required. Check with Ormazabal for the environmental conditions of the installation.

7.1 Voltage presence indicator test

To test the ekor.vpis or ekor.ivds voltage presence indicator, connect it to a 230 Vac power supply. To do this, disconnect the ekor.vpis or ekor.ivds device from the cubicle, and, using 4 mm terminals, apply the voltage between the test point for the phase to be checked and the earth test point.

No polarity is defined for 230 Vac voltage, so either the phase or neutral conductor can be connected.

If a flashing signal is observed, the device is working correctly. In order to properly test the ekor.vpis or ekor.ivds, this check should be carried in the 3 phases.

Figure 7.1 Connection mode ekor.vpis / ekor.ivds

MaintenanceGeneral instructions

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Voltage presence indication is not sufficient in itself to ensure that the installation has been disconnected from the electricity supply. Before accessing the cable compartments, it is necessary to confirm that the feeder is connected to earth.

The ekor.vpis or ekor.ivds voltage indicator can be replaced if necessary. To do so, loosen until removing the two screws on the top right and bottom left of the indicator using a medium size Philips screwdriver. The ekor.vpis or kor.ivds unit can then be disconnected from the base without needing to power down the feeder.

7.2 Acoustic earthing prevention alarm test

To test that the ekor.sas acoustic alarm is working correctly, connect the ekor.vpis at 230 Vac with 4 mm terminals, which are placed in the indicator between the earth test point and the test point for phase L1. Maintain the auxiliary power for 5 minutes, after which time the lever is inserted in the earthing switch shaft in order to carry out the operation. The alarm starts to sound and continues to sound for at least 30 seconds. It will stop when the lever is removed.

The ekor.sas alarm can be replaced if necessary, since it is joined to the associated units with two friction-fit PCB connectors:

• One 3-pin connector, polarised for the voltage presence Indicator.

• One 2-pin connector for the lever microswitch.The procedure is as follows:

Remove the driving mechanism cover.

• Unscrew the ekor.sas unit to extract it.• Undo both connectors and replace the current

unit; then connect it to the lever microswitch (2-pin connector) and the voltage indicator (polarised 3-pin connector).

Figure 7.2 Detail of ekor.sas device

ekor.sas connections:

Figure 7.3 Connection detail of ekor.sas device

General instructionsMaintenance

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7.3 Specific maintenance for the cgm.3-v cubicle

The driving mechanisms and other elements outside the gas tank may require preventive maintenance; the frequency of this maintenance depends on the existing environmental conditions (harsh environments, dust, extreme temperatures, etc.) and must be established in line with the experience and responsibility of the installer.

Maintenance should be carried out every 5 years or 2000 operating cycles, unless, based on the conditions of use, the user, together with Ormazabal, considers otherwise.

The recommended preventive maintenance sequence is described in Operations Manual MO-079 by Ormazabal.

Spares and accessoriesGeneral instructions

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8 Spares and accessories

Although the cubicles have been designed for a service life in accordance with IEC 62271-200, certain components can be replaced and installed for various reasons.

Certain spares and accessories must be installed in the cubicle by specialised personnel. Please check with Ormazabal.

If any of the stated auxiliary components need to be changed, the corresponding spare parts kit must be ordered, and the instructions given in the corresponding documentation must be followed.

Driving mechanism -l -p -s -s-pt -v -m -rb / -rb-pt

-rc / -r2c -2lp -2lv

B X - X X X - O - X X

BM O - O O - - - - O O

BR-A - X[1] - - - - - - X -

BR-AM O O - - - - - - O -

AV - - - - O - - - - X

RAV - - - - O - - - - X

Circuit-breaker - - - - O - - - - O

4 NC + 4 NC circuit-breaker - - - - O - - - - O

Set of auxiliary contacts2 NO + 2 NC switch1 NO + 1 NC earth connection

O - O O - - - - O O

Opening coil - - - - O - - - - O

Opening coil + 1 NOC switch + micro-switch - O - - O - - - O O

Bistable + 1 NOC switch + micro-switch - O - - - - - - O -

Protection, metering and control -l -p -s -s-pt -v -m -rb / -rb-pt


ekor.sas X O - O O - O - O X

ekor.vpis X X O X X O X O X X

ekor.ivds[1] O O O O O O O O O O

ekor.rpg / ekor.rpg.ci-rtu - - - - O - - - - O

ekor.rpt - O - - - - - - O -

ekor.spc O - - - - - - - O O

ekor.rci O - O O - - O - O O

ekor.rtk O O - - O - - - O O

[1] Components which can only be replaced by specially qualified Ormazabal personnel.

General instructionsSpares and accessories

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Enclosure -l -p -s -s-pt -v -m -rb / -rb-pt


Metering transformers and medium-voltage jumper access cover - - - - - X - - - -

Gas relief compartment X X X X X - X - X X

Cable compartment access cover X X[3] - - X - X X X X

Special cable compartment access cover O - - - - - O - O -

Medium-voltage cable fixing support X X - - X X X X X X

Earth collector X X X X X X X X X X

Interlocks and locks -l -p -s -s-pt -v -m -rb / -rb-pt


Earth connection OPEN O O - O O - O - O O

Earth connection CLOSED O O - O O - O - O O

Switch OPEN O O O O O - - - O O

Switch CLOSED O - O O - - - - O O

Earth connection CLOSED + OPEN O O - O O - O - O O

Opening the access cover - - - - - O - O - -

Others -l -p -s -s-pt -v -m -rb / -rb-pt


Control box O O O O O O O - O -

Auxiliary profiles for fastening to the floor O O O O O O O O O O

Side incoming cable box O O O O O - O - O O

Medium-voltage connection bridges - - - - - X - - - -

Voltage transformer connection braids - - - - - X - - - -

Voltage transformers - - - - - O - - - -

Current transformers - - - - - O - - - -

bushlink female bushing-bushing converter - - - - - - - O - -

Operating sequence plate X X X X X - X - X X

Name plate X X X X X X X X X X

(O) Optional equipment.(X) Basic equipment.(-) Not available[3] Cable compartment access cover and compartment

Environmental informationGeneral instructions

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9 Environmental information

cgm.3 is defined as a pressure-sealed hermetic system, according to IEC 62271-1, which contains sulphur hexafluoride (SF6)

[24].

SF6 is included in the Kyoto Protocol list of greenhouse gases. SF6 has a GWP (Global Warming Potential) of 22 200 (TAR, IPCC 2001).

At the end of the product's life, the SF6 contained in it must be recovered for processing and recycling, to prevent it

being released into the atmosphere. Extracting and handling of SF6 must be carried out by qualified personnel, using a sealed piercing system.

For the usage and handling of the SF6 , the indications listed in IEC 62271-303 must be followed.

The management and treatment of the rest of materials must be carried out in accordance with the country’s current legislation.

[24] This information is given on a label on the equipment itself.

General instructionsNotes

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Notes

NotesGeneral instructions

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Notes

General instructionsNotes

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Notes

Subject to change withoutprior notice.

For further information, contact Ormazabal.

Ormazabal y Cía.

IGORRE Spain

www.ormazabal.com

cgm.3 system - ormazabal · standard iec 62271-1. figure 1.2 gas tank for cgm.3-l 1.3.2 driving...

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