Ground fault circuit breaker test circuit for panelboards having minimum penetrations and testing circuit breakers without opening panelboard enclosure
First Claim
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1. A ground fault circuit interrupter ("GFCI") circuit breaker test circuit for panelboards, comprising:
- a panelboard enclosure;
a plurality of GFCI circuit breakers, n, disposed within said panelboard enclosure, wherein each of the GFCI circuit breakers includes a corresponding load output terminal;
a plurality of test terminals, n, each of which is electrically connected to one of said corresponding load output terminals;
a circuit for testing each of said plurality of GFCI circuit breakers, said circuit for testing including a test load selectively connected to one of said test terminals by a selector switch; and
said circuit for testing further including no more than two test actuators located externally to said panelboard enclosure enabling each of said plurality of GFCI circuit breakers to be tested without opening said panelboard enclosure.
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Abstract
A ground fault circuit interrupter (GFCI) circuit breaker test circuit for use with panelboards uses a selector switch, normally open switch, and a resistor to simulate a fault condition at the load output node of any one of several GFCI circuit breakers. This arrangement allows for testing of the circuit breakers while eliminating the need to use an external test actuator to operate the manual test button of each circuit breaker. Thus, shaft penetrations through the panelboard enclosure are minimized, resulting in reduced hazards, increased reliability, easier testing, and greater economy.
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Citations
19 Claims
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1. A ground fault circuit interrupter ("GFCI") circuit breaker test circuit for panelboards, comprising:
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a panelboard enclosure; a plurality of GFCI circuit breakers, n, disposed within said panelboard enclosure, wherein each of the GFCI circuit breakers includes a corresponding load output terminal; a plurality of test terminals, n, each of which is electrically connected to one of said corresponding load output terminals; a circuit for testing each of said plurality of GFCI circuit breakers, said circuit for testing including a test load selectively connected to one of said test terminals by a selector switch; and said circuit for testing further including no more than two test actuators located externally to said panelboard enclosure enabling each of said plurality of GFCI circuit breakers to be tested without opening said panelboard enclosure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A ground fault circuit interruptor ("GFCI") circuit breaker test circuit for panelboards, comprising:
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a panelboard enclosure; a plurality of GFCI circuit breakers disposed within the panelboard enclosure, each of which is connected electrically to a load terminal; a circuit for testing each of said plurality of GFCI circuit breakers, wherein said circuit for testing includes no more than two test actuators located externally to said panelboard enclosure enabling each of said plurality of GFCI circuit breakers to be tested without opening said panelboard enclosure; and said circuit for testing further comprises a test switch and a selector switch selectively connected to one of said load terminals, said test switch and said selector switch being activated by said external test actuator(s). - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A ground test circuit interruptor ("GFCI") circuit breaker test circuit for panelboards, comprising:
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a panelboard enclosure; a plurality of GFCI circuit breakers disposed within said panelboards enclosure, wherein each of the GFCI circuit breakers includes a corresponding load output terminal; a circuit for testing each of said plurality of GFCI circuit breakers without opening said panelboard enclosure, said circuit for testing comprising; a selector switch for selectively connecting one of said corresponding load output terminals to said circuit; a test switch electrically connected to said selector switch; a test load electrically connected to said test switch; and no more than two shaft penetrations through said panelboard enclosure for connecting said selector switch and said test switch to no more than two test actuators being located externally to said panelboard enclosure. - View Dependent Claims (17, 18, 19)
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Specification