IS 9251 : 1979 Capacitors for inductive heat generating plants operating at frequencies between 40 and 24 000 Hz

1 Scope

1.1 This standard specifies the safety and performancerequirements, and methods of tests for capacitors for power factorcorrection of inductive heat generating plants and also forotherwise modifying the characteristics, such as voltage andfrequency of a circuit. It also provides guidance for installationand operation of such capacitors. The capacitors covered by thestandard shall be suitable for operation at frequencies between 40and 24 000 Hz.

1.2 This standard applies to the indoor capacitor units bankscomplete with accessories which are intended:

a) for parallel and series connection, and

b) for connection to an adjustable ( variable) ac voltagesystem.

1.3 This standard does not cover This types of capacitors:

a) Capacitors which are directly connected to ac low, medium andhigh voltage distribution network;

b) Capacitors intended for control, protection and measurementpurposes (for example, coupling capacitors and the like of it);

c) Small capacitors as used for fluorescent and discharge lampsand for electric sign circuits; and

d) Capacitors for motor starting application and the like of it.

2 References

IS 2 :1960Rules for rounding off numerical values

IS 1885 : Part XLII :1977 Electrotechnical vocabulary:Part XLII Power capacitors

IS 2834 :1964Specification for shut capacitors for powersystem