Relay protection for capacitor banks

Details Relay protection for capacitor banks Relay protection for capacitor banks

1976-10-15

1978-05-16

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Capacitor protection

361 89, H02H 716

Patent

active

040902269

ABSTRACT:
A capacitor bank is provided with a relay protection device having a number of measuring stations for sensing a number of different disturbances associated with the capacitor bank. Each respective primary winding of a number of auxiliary transformers is connected to a respective measuring station. The auxiliary transformers generate signals at the respective secondary windings thereof with each signal having a respective duration and level output for identifying a respective one of the different disturbances. An electrically insulated current transformer transmits output signals representative of the auxiliary transformer signals to a number of sensing relays each having a respective tripping time and signal level response such that the particular disturbance can be identified.

REFERENCES:
patent: 2928995 (1960-03-01), Hjertberg
patent: 3562586 (1971-02-01), Carter et al.
patent: 3755711 (1973-08-01), Fendt

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