System for production of induction machines against damage from

Details System for production of induction machines against damage from System for production of induction machines against damage from

1985-10-23

1987-12-01

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Motor protective condition responsive circuits

361 29, 361 33, 307 86, 307142, H02H 708

Patent

active

047108410

ABSTRACT:
Protection of induction motors and generators is provided to allow rapid reclosure of the power supply or fast transfer from one power supply to an alternate supply. A switching sequence is disclosed in which motor stator windings are short circuited immediately following interruption of the supply voltage. Said short circuit quickly discharges to a safe value the energy stored in the rotor of the induction machine, allowing the short circuit to be removed and safe reconnection to the power supply to be accomplished without further delay.

REFERENCES:
patent: 3894274 (1975-07-01), Rosenberry, Jr.
patent: 4022598 (1977-05-01), Gucwa, Jr. et al.
patent: 4310771 (1982-01-01), Wyatt et al.
patent: 4384213 (1983-05-01), Bogel
patent: 4451865 (1984-05-01), Warner et al.

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