IS 2165 : Part 1 : 1977 Insulation coordination: Part 1 Phase to earth insulation coordination principles and rules

1 Scope

1.1 This standard covers the principles of insulationco-ordination and applies to equipment for three-phase ac systems,having a highest voltage for equipment above 1 kV.

Note - At present this standard covers only `phase-to-earthinsulation.

2 References

IS 2 :1960Rules for rounding off numerical values

IS 585 :1962Specification for voltages and frequency for actransmission and distribution systems

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

IS 2071 : Part II :1974 Methods of high voltage testing: Part IITestprocedures

IS 3716 :1978Application guide for insulation co-ordination

IS 4000 :1978Application guide for non-linear resistor-typelightning arresters for alternating currentsystems