Automatic transfer switch
First Claim
Patent Images
1. An interlock mechanism for use in an automatic transfer switch having first and second breakers switches with corresponding first and second breaker switch handles, comprising:
- an interlock member movably mounted adjacent to the first and second breaker switches, in cooperating arrangement with the first and second breaker switch handles, for preventing both first and second breaker switch handles from being in their respective ON positions simultaneously, so that upon movement of one of the first and second breaker switch handles to its ON position, causes the one of the first and second breaker switch handles contacts the interlock member, and causes it to move, and bear against the other of the first and second breaker switch handles to move the other of the first and second breaker switch handles to its OFF position; and
an actuator, moveably mounted adjacent to the first and second breaker switches, in driven connection to a prime mover, and in cooperating arrangement with the first and second breaker switch handles, for selectively pushing one of the first and second breaker switch handles away from its OFF position, toward its ON position, so that the breaker switch handles are operably interposed between the interlock member and the actuator,the interlock member and the actuator being cooperatively configured to enable both of the first and second breaker switch handles to be in their respective OFF positions, but to preclude both of the first and second breaker switch handles from being in their respective ON positions simultaneously,the interlock member and the actuator being further cooperatively configured so as to ensure that when the actuator is being driven to move a breaker switch handle for one of the first and second breakers from its OFF position to its ON position, the breaker switch handle for the other of the first and second breakers will be moved by the interlock member from its ON position to its OFF position, before the breaker switch handle of the one of the first and second breakers attains its ON position.
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Abstract
An automatic transfer switch apparatus for use with a stand-alone generator, for supplying emergency power to a residence or small business. The automatic transfer switch apparatus is configured to sense a utility line failure, start up and stabilize the generator, and switch over the household circuits from the utility to the generator, and switch back when the utility recovers. The transfer switches incorporate motor-driven switch interlock mechanisms in several embodiments, as well as various operational features.
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Citations
9 Claims
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1. An interlock mechanism for use in an automatic transfer switch having first and second breakers switches with corresponding first and second breaker switch handles, comprising:
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an interlock member movably mounted adjacent to the first and second breaker switches, in cooperating arrangement with the first and second breaker switch handles, for preventing both first and second breaker switch handles from being in their respective ON positions simultaneously, so that upon movement of one of the first and second breaker switch handles to its ON position, causes the one of the first and second breaker switch handles contacts the interlock member, and causes it to move, and bear against the other of the first and second breaker switch handles to move the other of the first and second breaker switch handles to its OFF position; and an actuator, moveably mounted adjacent to the first and second breaker switches, in driven connection to a prime mover, and in cooperating arrangement with the first and second breaker switch handles, for selectively pushing one of the first and second breaker switch handles away from its OFF position, toward its ON position, so that the breaker switch handles are operably interposed between the interlock member and the actuator, the interlock member and the actuator being cooperatively configured to enable both of the first and second breaker switch handles to be in their respective OFF positions, but to preclude both of the first and second breaker switch handles from being in their respective ON positions simultaneously, the interlock member and the actuator being further cooperatively configured so as to ensure that when the actuator is being driven to move a breaker switch handle for one of the first and second breakers from its OFF position to its ON position, the breaker switch handle for the other of the first and second breakers will be moved by the interlock member from its ON position to its OFF position, before the breaker switch handle of the one of the first and second breakers attains its ON position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An automatic transfer switch, comprising:
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a first breaker switch operably and interruptably connected between a load and a utility power source, the first breaker switch having a first breaker switch handle movable between ON and OFF positions; a second breaker switch operably and interruptably connected between the load and an auxiliary power source, the second breaker switch having a second breaker switch handle movable between ON and OFF positions; an interlock mechanism, operably interconnecting the first and second breaker switch handles, for selectably moving the one of the first and second breaker switch 10 handles away from one of its ON or OFF positions to the other of its ON or OFF positions, while also moving the other of the first and second breaker switch handles away from its OFF or ON positions to the other of its OFF or ON positions, respectively; a motor assembly, drivingly connected to the interlock mechanism; and a controller, operably connected to the first and second breakers, the utility power supply, the auxiliary power supply, and the motor assembly, for actuating the interlock mechanism so as to cause the first and second breaker switch handles to change positions, upon detection by the controller of a change in at least one characteristic of utility power being supplied which corresponds to a predetermined condition indicating a possible impending loss of utility power; the interlock mechanism including an interlock member movably mounted adjacent to the first and second breaker switches, in cooperating arrangement with the first and second breaker switch handles, for preventing both first and second breaker switch handles from being in their respective ON positions simultaneously, so that upon movement of one of the first and second breaker switch handles to its ON position, causes the one of the first and second breaker switch handles contacts the interlock member, and causes it to move, and bear against the other of the first and second breaker switch handles to move the other of the first and second breaker switch handles to its OFF position; and an actuator, moveably mounted adjacent to the first and second breaker switches, in driven connection to the motor assembly and in cooperating arrangement with the first and second breaker switch handles, for selectively pushing one of the first and second breaker switch handles away from its OFF position, toward its ON position, so that the breaker switch handles are operably interposed between the interlock member and the actuator.
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Specification