Sr.No.

Vol.

No.

Section/Clause No.

NIT Reference

Bidder’s Queries

DTL’s comments

1.

II

Section Technical specifications-33KV Equipments

Cl.No.2.1.4

SF6 GAS CIRCUIT BREAKER

We wish to bring to your kind notice that most of the medium voltage switchgear being used by various utilities in India is based on Vacuum technology and is being supplied by all leading manufacturers. The breakers have been in operation for past many years and are considered to be very reliable and low maintenance cost.

Based on the above request you to kindly approve 33kV breakers with vacuum technology as well.

The bidder can offer VCB or SF6

2.

II

Section Technical specifications-G.T.R. Cl. 4.8.1

Sub cl.9

TECHNICAL PARAMETERS

In this respect we wish to bring to your kind notice that since various DISCOMS of Delhi , like NDMC and many other state utilities are operating with STC of 25KA at 33KV voltage level and has been widely acceptable. Hence as such, request you to kindly accept 33KV outdoor breaker with STC of 25KA.

33KV breaker with STC of 31.5KA is only acceptable as per NIT.

3

II

Section-relay and protection panel for SAS, clause 23. Configuration of relay and protection panels:- Sl. No.2 of Line protection Panel.

CONFIGURATION OF RELAY AND PROTECTION PANELS

Item Description

2. Main-2 Numerical Distance Protection Scheme having inbuilt feature of Disturbance recorder, Distance to fault locator.

2. Main-2 Numerical Current Differential Protection Scheme having inbuilt feature of Disturbance recorder, Distance to fault locator. Specifications shall be provided during detailed engineering.

Bidder has to provide matching relay for the far end also and its commissioning