Latch operated tap changing switch for transformer regulating sy

Details Latch operated tap changing switch for transformer regulating sy Latch operated tap changing switch for transformer regulating sy

1978-03-02

1980-01-22

Scott, James R.

Electricity: circuit makers and breakers

Multiple circuit control

Operating means

200 11TC, H01H 300

Patent

active

041851773

ABSTRACT:
A tap-changing transformer system, utilized for voltage regulation of the line potential applied to a load from a source of energy, has a non-arcing switch to protect tap contacts during a tap change. A fail-safe circuit is utilized to determine that the non-arcing switch and its associated circuitry are operating properly before a movable tap contact is transferred from one stationary tap to another. In the event that the fail-safe circuit detects an improper operation of the non-arcing switch, the source is connected directly to the load to preclude the passage of any load current through the tap-changing transformer. A particular form of transfer switch useful in effecting the connection of the source directly to the load employs a current-limiting impedance arrangement.

REFERENCES:
patent: 3309571 (1967-03-01), Gilker
patent: 3436646 (1969-04-01), Prescott
patent: 3806735 (1974-04-01), Brever et al.

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