BS 4999-111:1987 General requirements for rotating electrical machines. Built-in thermal protection for electric motors rated at 660 volts a.c. and below (Withdrawn)
Publication Year
1987
Document Status
Withdrawn
Abstract
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.
Document History
Superseded by BS EN 60034-11:2004. Supersedes BS 4999-72:1972.
ISBN
0580157806
Publisher Information
British Standards Institution
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