responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents

Full Title

Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection > responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents

Classification Context

Section:

ELECTRICITY

Class:

GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER

Subclass:

EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS

Child Classifications

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• H02H 3/28 involving comparison of the voltage or current values at two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus
• H02H 3/32 involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
• H02H 3/36 involving comparison of the voltage or current values at corresponding points of different systems, e.g. of parallel feeder systems