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20

engineer after inspection.

16.

Four sets of instruction manuals for commissioning, operation and maintenance and

four copies of guarantee certificate are to be supplied with transformer.

17.

The transformer should be guaranteed for trouble free operation for a period of 18

months from the date of supply or 12 months from the date of commissioning.

18.

Transformer should be dispatched filled with transformer oil to the required level so

that the winding does not absorb moisture. Remaining oil should be sent to site with 20%

extra oil in M.S. drum as per relevant IS.

19.

Dissolve Gas Analysis and Tan Delta testing must be carried out at manufacturer's

premises in presence of OIL's Engineer and relevant test certificate must be submitted along

with the supply of transformer.

20.

Packing should be adequate to avoid transit damage and ingress of water.

TECHNICAL SPECIFICATIONS OF 1000KVA CAST RESIN DRY TYPE TRANSFORMER

REQUIRED QUANTITY = 2 NOS

1000KVA, 11kV/415V, 3 Phase, 50 Hz, double winding, copper conductor, Dry type, Cast Resin Insulated, natural air cooled distribution transformer for indoor use & as per following data sheet:

A. GENERAL:

2.

Service duty

3.

Installation

: Indoor.

: Continuous.

1.

Applicable Indian Standard: IS: 11171 with latest amendments.

4.

Auxiliary power supply

5.

Control Voltage

: 240V AC ± 10 %

: 240V AC ± 10 %

list no. 25).

6.

Make: NGEF, Crompton Greaves, Alstom, Bharat Bijlee (as per OIL's standardized item

B. SITE CONDITION:

1

  • a)

    Maximum Ambient air temperature: 40 º C

  • b)

    Minimum Ambient air temperature: 6.0 º C

2.

Maximum humidity at site (at 40 º C): 98 %

3.

Surrounding atmospheric condition

: Humid

4.

Site altitude

: 120mtr

5.

Seismic design co-efficient

: As per IS : 1983

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