Reduction of mechanical stresses on turbosets upon occurrence of

Details Reduction of mechanical stresses on turbosets upon occurrence of Reduction of mechanical stresses on turbosets upon occurrence of

1976-01-20

1977-08-16

Miller, J D

Electricity: electrical systems and devices

Safety and protection of systems and devices

Generator protective circuits

322 27, 361 58, 361 93, H02H 706

Patent

active

040429636

ABSTRACT:
A method and apparatus for reducing the mechanical stresses on the shaft of a turboset and on the shaft of the generator coupled thereto upon the occurrence of a three-pole mains short circuit near the generator and upon the subsequent elimination of the three-pole short circuit. A generator switch is connected between the output of the generator and the mains, and a resistor, whose size is adapted to the size of the load on the generator, is connected in parallel with the generator switch. The generator switch is opened upon the occurrence of a short circuit to switch the resistor into the load circuit of the generator and the resistor is again bridged when the short circuit is switched off of the mains.

REFERENCES:
patent: 2316170 (1943-04-01), Kesselring et al.
patent: 3366837 (1968-01-01), Mester
patent: 3529210 (1970-09-01), Ito et al.
patent: 3566152 (1971-02-01), Casey et al.
patent: 3590319 (1971-06-01), Baltensperger
patent: 3873887 (1975-03-01), Barkan et al.
patent: 3935509 (1976-01-01), Eidinger

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