TRANSFORMERS STANDARDS

IS-6600/IEC-60354: LOADING OF THE TRASNFORMER

IEC-60599 : interpretation of DGA results

CIGRE SC 12 Working Group 12.22 : Guidelines for conducting design reviews for transformers & reactor

IS/IEC 60076 and CIGRE SC 12: recommendations for short circuit test/calculations

NEMA TR-1: permitted noise levels.

IS-4253: regarding GASKETS

BS-5500: Post Weld Heat Treatment

BS-4360 / IS 2062: metal plate, bar and sections for fabrication

IS-2099 / IS-3347 / IS-12676/ IEC-60137: Electrical And Mechanical Characteristics Of Bushings & Testing Of Bushing

IS-335: Oil of oil filled transformer and bushings

IS 12463 (2000)/ IEC60296 : Testing of oil prior to energization

IEC 60076 : terminal marking and their physical position may be in bushing

IS:2705/IEC-60185 : Current Transformer

IS-2026 : different standards for OLTCs, Type test, Routine test, special test for transformers and Shunt reactors(IS 5553).

IS 12075 : Vibrations limits for motors

IS 325 : routine test for motors in OLTC

IS 5 : Paint for Motor

CIGRE report WG-12.17 - “Effect of particles on transformer dielectric strength”

IEC 61181/ CIGRE Guidelines : Acceptance Norms With Reference To Various Gas Generation Rates During The Temperature Rise Test

IEC -60599interpretation of DGA results

IEC 60296 Treatment Of New Oil

IS: 1866/IEC: 60422 : Reconditioning Of Used Oil (For Oil In Service)

IEEE C37.20 : Temperatures At Various Locations Of Cabinet/Box

IEC-61850 : for remote communication

IS: 2026 Part-III : HV neutral impulse test

IS:10028 : Criteria for providing oil soak pit and collection pit for various transformers

a) Top & bottom cooler shut-off valves (min. 200 mm) – 04 Nos.

b) Buchholz relay shut-off valve ((min. 80 mm) – 01 No.

c) Conservator shut-off valve at Conservator end (min. 80 mm) – 01 No.

d) Conservator drain valve (min. 25 mm) – 01 No.

e) Gas collection valve (min. 08 mm) – 01 No.

f) Transformer oil drain valve (Minimum 100mm) – 01 No.

g) Radiator shut-off valves (Top & bottom) (80 mm) – as per approved scheme

h) Transformer oil shut-off valves (200 mm) – as per approved scheme

i) Transformer oil reverse flow blocking devices (200 mm) – as per approved scheme

j) Fill & filter valves – Top & bottom (50 mm) – 02 Nos.

k) Cooler drain valves (50 mm) – 02 Nos.

l) Oil inlet valves for cooler bank (150 mm) - as per approved scheme

m) Sampling valves (15 mm) – 02 Nos.

n) Valves for vacuuming Top (25 mm) – 02 Nos.

o) Valves for vacuuming of Cooler circuit – as per approved scheme

p) Valves for vacuuming of Conservator – as per approved scheme

q) Thermo-siphon filter shut-off valves (100 mm) – 02 Nos.

r) Breather isolating valves - as per approved scheme

s) Sludge collection valve at bottom most point of tank - as per approved scheme

Adequate number of air release vents as per approved scheme