IS 2705 : Part 1 : 1992 Current transformers: Part 1 General requirements

1 Scope

This Indian Standard (Part 1), specifies the generalrequirements applicable to current transformers for use withelectrical measuring instruments and electrical protective devicesat frequencies from 15 to 100 Hz. This standard basically appliesto current transformers with separate windings, but whereappropriate, it will also apply to auto-transformer type currenttransformers.

2 References

List of Referred Indian Standards

IS 335 :1983New insulating oils

IS 613 :1984Copper rods and bars for electrical purposes

IS 2053 :1974Thermocouple pyrometers

IS 2071 : Part 1 :1974 Methods of high voltage testing Part 1Generaldefinitions and test requirements

IS 2071 : Part 2 :1974 Methods of high voltage testing Part 2Testprocedures

IS 2099 :1986Bushings for alternating voltages above 1000 V

IS 2147 :1962Degree of protection provided by enclosures forlow voltage switchgear and controlgear

IS 2165 : Part 1 :1977 Insulation coordination Part 1 Phase toearthinsulation coordination

IS 3716 :1978Application guide for insulation coordination

IS 4201 :1983Application guide for current transformers

IS 5621 :1980Hollow insulators for use in electricalequipment

IS 9676 :1980Reference ambient temperature for electricalequipment

IS 10601 :1983Dimensions of terminals for high voltageswitchgear and controlgear

IS 11322 :1985Method for partial discharge measurement ininstrument transformers

IS 12360 :1988Voltage bands for electrical installationsincluding preferred voltages and frequency