IS 5142 : 1969 Continuously variable voltage auto transformers

1 Scope

1.1 This standard covers natural dry type and oil immersedmanually operated, torroidally wound continuously variable voltageauto-transformers. Motor operated variable voltageauto-transformers and variable voltage auto-transformers having apartial variation of output voltage are not covered in thisstandard.

2 References

IS 2 :1960 Rules for rounding offnumerical values

IS 335 : 1963Specification for insulating oil for transformers andswitchgear

IS 1271 : 1958Specification of insulating materials of electricalmachinery and apparatus in relation to their thermalstability in service

IS 2053 : 1962Specification for thermocouple pyrometers