System for disabling the reset circuit of fault indicating means
First Claim
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1. Fault indicating means responsive to flow of fault current in an electrical distribution system comprising:
- indicator means movable from one position to another position on flow of fault current in said system, a trip circuit responsive to flow of fault current in said system to shift said indicator means from said one position to said other position, a reset circuit to shift said indicator means automatically back to said one position on restoration of said system to normal operating condition; and
manually operable means for disabling said reset circuit to maintain said indicator means in said one position.
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Abstract
The reset circuit of a fault indicator is disabled to prevent automatic restoration of the movable target from fault indicating position where it can be observed and manually rest. A manually operable switch is connected across the reset ciruit and its contacts are closed by permanent magnet means or by manually operable switch means.
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Citations
8 Claims
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1. Fault indicating means responsive to flow of fault current in an electrical distribution system comprising:
- indicator means movable from one position to another position on flow of fault current in said system, a trip circuit responsive to flow of fault current in said system to shift said indicator means from said one position to said other position, a reset circuit to shift said indicator means automatically back to said one position on restoration of said system to normal operating condition; and
manually operable means for disabling said reset circuit to maintain said indicator means in said one position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- indicator means movable from one position to another position on flow of fault current in said system, a trip circuit responsive to flow of fault current in said system to shift said indicator means from said one position to said other position, a reset circuit to shift said indicator means automatically back to said one position on restoration of said system to normal operating condition; and
Specification