Removable keypad for an electronic circuit breaker
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United States of America Patent
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-
Aug 13, 1996
Grant Date -
N/A
app pub date -
Jan 30, 1995
filing date -
Jan 30, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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