CT quick change assembly

Details CT quick change assembly CT quick change assembly

1988-08-01

1989-12-26

Broome, H.

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

335 6, 335132, H01H 7300, H01H 7312, H01H 7500

Patent

active

048900818

ABSTRACT:
A molded case circuit breaker is provided with a quick change current transformer assembly. The current transformer is used to sense overcurrent conditions and apply a signal to an electronic trip unit to trip the circuit breaker. The quick change assembly includes an insulated removable plate located adjacent an open cavity in the housing in which the current transformer is located. The current transformer is donut-type disposed about a load-side conductor located in a cavity in the housing rigidly fastened to the circuit breaker frame. In order to replace a current transformer, the insulated back-plate is removed. Next the load-side conductor is unfastened and removed from the circuit breaker housing. The current transformer is then removed from the circuit breaker housing. In order to install a new current transformer, the steps are reversed.

REFERENCES:
patent: 3987382 (1976-10-01), Cataldo et al.
patent: 4037183 (1977-07-01), Gaskill
patent: 4090156 (1978-05-01), Gryctko
patent: 4281359 (1981-07-01), Bayer et al.
patent: 4489295 (1984-12-01), Altenhof, Jr. et al.
patent: 4638277 (1987-01-01), Thomas et al.
patent: 4656444 (1987-04-01), McKee et al.
patent: 4679018 (1987-07-01), McKee et al.

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