Tap changing assembly for power transformer

Details Tap changing assembly for power transformer Tap changing assembly for power transformer

2005-11-15

2005-11-15

Riley, Shawn (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a transformer or inductor as the final control device

Reexamination Certificate

active

06965217

ABSTRACT:
A tap changing assembly for power transformers having vacuum interrupters each of which is associated with a radio interrogated surface wave sensor capable of detecting whether the respective vacuum interrupter opens circuit in a timely manner. The sensors are interrogated by an interrogating unit transmitting high-frequency signals to the sensors and associated with a monitoring circuit responsive to signals received by the interrogating unit for signalling the status of the vacuum interrupter.

REFERENCES:
patent: 4434388 (1984-02-01), Carver et al.
patent: 6020821 (2000-02-01), Bauerschmidt et al.
patent: 6084503 (2000-07-01), Ruile
patent: 40 09 038 (1991-09-01), None
patent: 0 716 489 (1996-06-01), None
patent: 195 46 215 (1997-04-01), None

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