nepal electricity authority -...

NEPAL ELECTRICITY AUTHORITY

(An Undertaking of Government of Nepal)

Project Management Directorate

SASEC: Power System Expansion Project

KALIGANDAKI TRANSMISSION CORRIDOR PROJECT

ADDENDUM

FOR

Procurement of Plant for Kusma – New Butwal 220 kV Transmission Line

(Design, Supply, Installation & Commissioning)

Single-Stage, Two-Envelope

Bidding Procedure

August 2017

Kaligandaki Transmission Corridor Project

Project Management Directorate

Satungal – Bauthali Chowk Marga,

Chandragiri Municipality, Matatirtha, Kathmandu, Nepal

Telephone: + 977-1- 5164099,5164091

Facsimile number: +977-1-5164091

Electronic mail address: [email protected],

[email protected]

Telephone: +977-1-5164091, 5164099 Fax: +977-1-5164091

Issued on:

Invitation for Bids No.: RE:ICB-PMD-KGTCP–072/73-04

ICB No.: RE:ICB-PMD-KGTCP-072/73-04

Employer: Nepal Electricity Authority

Country: Nepal

ADDENDUM-II

AMENDMENT-II

RE: ICB-PMD-KGTCP-072/73-04

Procurement of Plant for

Kusma-New Butwal 220kV Transmission Line


Amendment-II

RE:ICB-PMD-KGTCP-072/73-04 Page 1 of 1

Amendment-II to Bidding Documents

Clause No. Existing Proposed Changes

Volume II,

Section I, Page

5

2.3.1 with disc insulators

SI No.

Particulars Triple Tension

1 No of Standard

Insulator Discs

3 x 17

2 Size of Disc

280 x 170

3 E& M Strength of each disc KN

160

4 Size and

Designation of pin ball shank (mm)

20

5 Creepage distance of each disc (mm)

315

2.3.1 with disc insulators

SI No.

Particulars Single ‘I’ Suspension

1 No of Standard

Insulator Discs 1 x 16

2 Size of Disc

255/280 x

145

3 E& M Strength of each disc KN 120

4 Size and

Designation of pin ball shank (mm) 20

5 Creepage distance of each disc (mm)

315

RE: ICB-PMD-KGTCP-072/73-04

Procurement of Plant for

Kusma-New Butwal 220kV Transmission Line


CLARIFICATION-II

RE:ICB-PMD-KGTCP-072/073-04 Clarification-II

Page 1 of 3

NEPAL ELECTRICITY AUTHORITY

PROJECT MANAGEMENT DIRECTORATE

KALIGANDAKI TRANSMISSION CORRIDOR PROJECT

RE:ICB-PMD-KGTCP-072/073-04: Design, Supply, Installation and Commissioning of Kusma-New Butwal220 kV Transmission Line

Responses to the Bid Queries

CLARIFICATION - II

S.

No.

Clause of

Reference

for the

required

Clarification

Bidder's Request NEA Response

Volume – 1

of Tender,

Section 3 -

Clause

2.5.2(v)

Offered HTLS conductor including the core

should have been fully type tested and the test

should have been carried out in a reputed

independent Internationally Accredited

Laboratory. All the type tests should have been

carried out as specified in Vol-II Chapter V

Annexure A within the last 5 years. In case the

bidder does not have a type test of the offered size

of Conductor, type test of a higher sized HTLS

Conductor of the same technology can also be

accepted provided the bidder carries out type test

at its own cost for

the offered sized.

In order to decide higher size of conductor, kindly

confirm which one of criteria will be applicable: -

Case 1: - A conductor shall be considered of

higher size if cross-section area of conductor is

1. Please refer Clause 1. 3, Section VA, Volume II Technical Particulars

of HTLS Conductor.

The HTLS conductor shall meet the following minimum

requirements:

Overall diameter of

complete conductor

Maximum 28.62 mm

Not less than 25 mm

Not less than 28.00 (applicable for

Carbon Fibre Composite Core only)

Approx. mass of

complete conductor

(kg/km)

Less than or equal to 1621

kg/km

Direction of lay of outer

layer

Right Hand

For Carbon Fibre Composite Core only:

Overall diameter of

Core of HTLS

More than or equal to 9.5 mm


Page 2 of 3

more than 400 Sqmm irrespective of core size &

overall diameter.


higher size if diameter of core is more than 9.5mm

& overall diameter of conductor is more than

25mm as specified in Table 1.3 od Section VA

Volume – 2.


higher size if diameter of core is less than 9.5mm

& stranded conductor diameter is more than

25mm.


higher size if diameter of core is more than 9.5mm

& stranded conductor diameter is less than 25mm.


higher size if it meets all the criteria mentioned

above.

2. Please refer Item No. 3 Clause (iv), 2.5 Subcontractors, Section 3,

Volume I

Offered core should have been fully type tested in reputed

independent accredited testing laboratory for the size offered. All the

type test should have been carried out as specified in Annexure A of

Vol-II, Chapter V.

3. Please refer Item No. 2 Clause (v), 2.5 Subcontractors, Section 3,

Volume I

Offered HTLS conductor including the core should have been fully

type tested and the test should have been carried out in a reputed

independent Internationally Accredited Laboratory. All the type tests

should have been carried out as specified in Vol-II Chapter V

Annexure A within the last 5 years. In case the bidder does not have a

type test of the offered size of Conductor, type test of a higher sized

HTLS Conductor of the same technology can also be accepted

provided the bidder carries out type test at its own cost for the offered

sized.

4. In case the bidder does not have a type test of the offered size of core,

type test of any other size HTLS Core other than the offered size shall

not be considered for evaluation.


Page 3 of 3

107 Clariifcation

- I, S.No. 99

As per above NEA response, Tower Design is as

per Latest Edition. While Loading Trees furnished

as per IS :802 (part I-1995).

According to IS: 802 (Part – I:1995) for Security

Condition Wind load on Wire & Conductor

Tension is as per 32°C 100% (Full Wind) wind

Condition. But according to IS: 802 (Part –

I:2015) for Security Condition Wind load on Wire

& Conductor Tension is as per 32°C 75% wind

Condition.

Kindly Confirm, we have to adopt Loading Trees

Furnished in Specification for Tower Design and

Wind Pressure on tower to be 100% under

security condition

Please confirm.

Tower shall be Designed as per the Loading Trees furnished along with

the bidding document and as per IS :802 (part I-1995), i.e. for Security

Condition Wind load on Wire & Conductor Tension is as per 32°C

100% (Full Wind) Condition.

The Loading Tree Diagram provided along with the bid is in order.

108

Table No.

2.1, Section-

IVB of

Volume-II

Soil Classification

SANDY SOIL

(a) Ultimate Bearing Capacity KN/M2 (Kg/M2)

498 (50800)

(b) Weight KN/M3 (Kg/M3) 14.12 (1440)

(c) Angle of Repose Degrees 20

Ultimate Bearing Capacity of Sandy Soil seem

incorrect, as per Latest CBIP, it is SBC = 25000

Kg/m2.

Please confirm.

The Soil Investigation is in the scope of the contractor and the actual

value as per Soil Investigation report shall be considered for civil design

during execution.