New Standard from Last Update.

1. SCOPE

1.1 This code gives the guidelines along with tests including failure analysis and record keeping for the repair of liquid-immersed, dry-type, outdoor/indoor type, stacked core/wound core with CRGO or amorphous core material, double wound distribution transformers with nominal system voltages up to and including 33 kV and of the following types and ratings:

a) Liquid-immersed: Oil/Natural Ester/Synthetic- Organic Ester:

1) Three-phase ratings: up to and including 2 500 kVA (both sealed and non-sealed); and

2) Single phase ratings: up to and including 100 kVA (sealed type).

b) Dry-Type:

1) Three-phase ratings: up to and including 3 150 kVA; and

2) Single phase ratings: up to and including 100 kVA.

1.2 This standard does not apply to transformers which are excluded from the scope of IS 1180 series (see NOTE 1, Clause 1 of IS 1180 series standards).