for dynamo-electric motors

Introduced: September 1968

Last revised: January 2006

Full Title

Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions > for dynamo-electric motors

Classification Context

Section:: ELECTRICITY
Class:: GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
Subclass:: EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS

4 direct subcodes

Child Classifications

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H02H 7/085 against excessive load
H02H 7/09 against over-voltage; against reduction of voltage; against phase interruption
H02H 7/093 against increase beyond, or decrease below, a predetermined level of rotational speed
H02H 7/097 against wrong direction of rotation