Electronic circuit interrupter with combined keypad and display

Details Electronic circuit interrupter with combined keypad and display Electronic circuit interrupter with combined keypad and display

1989-09-14

1990-07-31

Jennings, Derek S.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361357, 361400, H02H 308

Patent

active

049454439

ABSTRACT:
An electronic circuit interrupter digital display and keypad device includes a display to view circuit breaker settings combined with a keypad to select settings and values to be displayed. The display and keypad device connects to an electronic trip unit within the circuit interrupter by means of a tamper-free seal to prevent the circuit interrupter set points from being changed without authorization. Alternatively, a password-operated control switch provides a similar function.

REFERENCES:
patent: 4589052 (1986-05-01), Dougherty
patent: 4672501 (1987-06-01), Bilac et al.
patent: 4728914 (1988-03-01), Morris et al.
patent: 4751605 (1988-06-01), Mertz et al.
patent: 4814712 (1989-03-01), Burton et al.
patent: 4870531 (1989-09-01), Danek

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