BS 4999-72:1972
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Built-in thermal protection for electric motors rated at 660 volts a.c. and belowSpecification for general requirements for rotating electrical machines
Hardcopy
23-07-2013
English
14-02-1972
Classifies types of protection, specifies winding temperatures for steady overload and stalled conditions. Recommends thermistor reference temperatures. Characteristics for thermostats, thermistors and thermistor control units with appropriate tests. Thermistors are of positive temperature coefficient. An appendix gives typical characteristic curve.
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