Medium or high tension circuit breaker having abutting arcing co

Details Medium or high tension circuit breaker having abutting arcing co Medium or high tension circuit breaker having abutting arcing co

1991-04-15

1992-11-10

Scott, J. R.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200148B, 200148R, H01H 3342, H01H 3388

Patent

active

051626276

ABSTRACT:
A high tension or medium tension circuit breaker having abutting arcing contacts. The circuit breaker includes a gastight insulating case filled with a gas having good dielectric properties. The case contains a stationary arcing contact; a moving arcing contact driven by a drive rod actuated by a mechanism outside the case. A blast chamber is defined by a piston integral with the moving arcing contact, slidably received in a fixed cylinder terminating in a blast nozzle, the cylinder and a ring. The circuit breaker further includes a lost motion mechanism to enable the drive rod to move over a given length in the circuit breaker opening direction without driving the moving arcing contact away from the fixed arcing contact.

REFERENCES:
patent: 3639712 (1972-02-01), Balmat et al.
patent: 3763340 (1973-10-01), Noack
patent: 4489226 (1984-12-01), Holmgren et al.
patent: 4945197 (1990-07-01), Thuries et al.
patent: 5001314 (1991-03-01), Thuries et al.

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