involving comparison of phase voltages

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 > 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 > of a three-phase system > involving comparison of phase voltages

Classification Context

Section:

ELECTRICITY

Class:

GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER

Subclass:

EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS