using pilot wires or other signalling channel

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 two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus > using pilot wires or other signalling channel

Classification Context

Section:

ELECTRICITY

Class:

GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER

Subclass:

EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS