Thyristor fault-detecting apparatus

Details Thyristor fault-detecting apparatus Thyristor fault-detecting apparatus

1977-06-14

1979-01-02

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific quantity comparison means

361 76, 361 85, 361 94, 363 54, 340645, H02H 712

Patent

active

041330188

ABSTRACT:
A thyristor fault-detecting apparatus comprises a thyristor bridge with A.C. terminals connected to a three-phase A.C. power supply and having six thyristor arms, and an inductive load connected to D.C. terminals of the bridge. Each of the A.C. paths has a saturable reactor with an output winding so set as to be excited by the line current within the range from .pi./3 to 2.pi./3 (rad). Output voltages of the reactors are rectified and added, so that a fault in the thyristor is detected by the disappearance of the added output.

REFERENCES:
patent: 2938150 (1960-05-01), Kniel
patent: 3825768 (1974-07-01), Grygera
patent: 3999087 (1976-12-01), Compton
patent: 4016468 (1977-04-01), Graf

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