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6.

Rainfall

: 250cm annually.

C. RATING AND GENERAL DATA:

1.

Rating: 1000KVA continuously rated.

2.

No. of phases: 3.

3.

Frequency: 50 ± 3 %

4.

Type of Insulation: Cast Resin winding, Class-F. Temp. rise-90 º C

5.

Partial discharge: As per IS-11171, IS-6209.

6.

Type of cooling: AN

7.

Installation: Indoor

8.

Vector group: Dyn 11

9.

Percentage impedance: Below 5%. Tolerance as per IS-2026.

10.

Nominal voltage ratio: 11kV/415V.

11.

Type of neutral earthing : Directly grounded Neutral.

12.

Symmetric short circuit withstand capacity: As per IS-11171.

13.

Rated short duration power frequency withstand voltage: As per IS 11171.

14.

Rated lightning impulse withstand voltage: As per IS 11171 (List-2).

15.

TAP CHANGER:

Tapping steps

: In steps of 2.5 %.

Type

: OFF Circuit.

Total tapping range

: ± 5.0 %

HV winding line end

: Cable box with bushings.

LV winding line end

: Cable box with bushings.

16 TERMINAL ARRANGEMENT:

One LV Neutral bushing inside the cable box and one (additional) outside the cable box.

17. BUSHING:

Made from non hygroscopic epoxy resin cast material suitable for site condition mention in para- B & confirming to IS-2099.

Page 6 of 16

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