Zero-phase sequence protective device for faults within armature

Details Zero-phase sequence protective device for faults within armature Zero-phase sequence protective device for faults within armature

1975-10-01

1977-07-19

Miller, J D

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361 35, 361 42, H02H 708

Patent

active

040371387

ABSTRACT:
The neutral impedance of a three-phase synchronous machine is so combined with the three-phase, Y-connection protective impedance with the neutral ground connected to a terminal of the synchronous machine that the line current in the branch including a fault may be reduced to zero when a parallel fault occurs within the armature winding, thereby protecting the armature winding and the core of the rotor from burning.

REFERENCES:
patent: 1255387 (1918-02-01), Chubb
patent: 2246926 (1941-06-01), Roman
patent: 2296109 (1942-09-01), Light
patent: 2535064 (1950-12-01), Harrison
patent: 2824978 (1958-02-01), Knudsen
patent: 3270246 (1966-08-01), Lemens
patent: 3546572 (1970-12-01), Specht et al.
patent: 3555291 (1971-01-01), Dewey
patent: 3617765 (1971-11-01), Kilgour et al.
patent: 3688157 (1972-08-01), Spears

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