Protective device for preventing blowout of bushing in high-volt

Details Protective device for preventing blowout of bushing in high-volt Protective device for preventing blowout of bushing in high-volt

1985-09-05

1987-11-24

Envall, Jr., Roy N.

Electricity: electrical systems and devices

Safety and protection of systems and devices

361 1, 361 37, 307141, H02H 700

Patent

active

047092912

ABSTRACT:
For protecting service personnel during maintenance work on a metal-encapsulated, compressed-gas-insulated high-voltage switching installation, a protective device is provided which is used if gas spaces with voltage-carrying conductor parts are bounded by unilaterally exposed bulkhead bushing insulators. Sensors of the protective device are arranged at the gas spaces and their signals are fed via an evaluating unit to a tripping unit for opening feed switches to cut off the voltage to the conductor elements in the gas spaces as well as for blocking the reclosing of these feed switches.

REFERENCES:
patent: 2838728 (1958-06-01), Belamin
patent: 3887915 (1975-06-01), Olssen

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