Removable keypad for an electronic circuit breaker

Details Removable keypad for an electronic circuit breaker Removable keypad for an electronic circuit breaker

1995-01-30

1996-08-13

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

With housing or support means

200295, H01H 902

Patent

active

055449590

ABSTRACT:
A removable keypad controls the electronic trip unit used within state-of-art electronic circuit breakers. The keypad allows inputting and displaying relevant circuit interruption information. Unauthorized access to the trip unit settings is prevented by blocking off the keypad "ENTER" key while still allowing access to the keypad's remaining function keys.

REFERENCES:
patent: 4539541 (1985-09-01), Bharteey et al.
patent: 4589052 (1986-05-01), Dougherty
patent: 4870531 (1989-09-01), Danek

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