GROUND FAULT INTERRUPT AUTOMATIC TEST METHOD FOR ELECTRIC VEHICLE
First Claim
1. A method for processor based automated testing of a ground fault interrupt circuit in electric vehicle supply equipment, the method comprising:
- a) detecting whether a utility power contactor is open after connecting the electric vehicle supply equipment to an electric vehicle;
b) verifying the ground fault interrupt circuit is enabled so as to allow closing of the contactor;
c) applying a test signal to simulate a ground fault;
d) verifying that the ground fault interrupt circuit tripped to disable closing of the contactor in response to the test signal;
e) commanding the contactor to close from a processor while the ground fault interrupt circuit is tripped;
f) verifying the contactor does not close in response to commands from the processor while the ground fault interrupt circuit is tripped;
g) resetting the ground fault interrupt circuit; and
h) verifying the contactor closes after resetting the ground fault interrupt circuit.
1 Assignment
0 Petitions
Accused Products
Abstract
In one implementation, the method for processor based automated testing of ground fault interrupt circuit for electric vehicle supply equipment is provided. In one implementation the method includes providing a simulated ground fault signal to a ground fault interrupt circuit and detecting at a processor that the ground fault interrupt circuit sensed the simulated ground fault signal. The method further includes commanding from the processor a utility power contactor to close while the ground fault interrupt circuit is disabling closing of the contactor and verifying the utility power contactor is not closed in response to commanding the utility power contactor to close.
7 Citations
32 Claims
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1. A method for processor based automated testing of a ground fault interrupt circuit in electric vehicle supply equipment, the method comprising:
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a) detecting whether a utility power contactor is open after connecting the electric vehicle supply equipment to an electric vehicle; b) verifying the ground fault interrupt circuit is enabled so as to allow closing of the contactor; c) applying a test signal to simulate a ground fault; d) verifying that the ground fault interrupt circuit tripped to disable closing of the contactor in response to the test signal; e) commanding the contactor to close from a processor while the ground fault interrupt circuit is tripped; f) verifying the contactor does not close in response to commands from the processor while the ground fault interrupt circuit is tripped; g) resetting the ground fault interrupt circuit; and h) verifying the contactor closes after resetting the ground fault interrupt circuit. - View Dependent Claims (2, 3, 4)
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5. A method for processor based automated testing of ground fault interrupt circuit for electric vehicle supply equipment, the method comprising:
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a) providing a simulated ground fault signal to a ground fault interrupt circuit; b) detecting at a processor that the ground fault interrupt circuit sensed the simulated ground fault signal; c) commanding from the processor a utility power contactor to close while the ground fault interrupt circuit is disabling closing of the contactor; and d) verifying the utility power contactor is not closed in response to commanding the utility power contactor to close. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for processor based automated testing of a ground fault interrupt circuit in electric vehicle supply equipment, the method comprising:
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a) providing a simulated ground fault signal to a ground fault interrupt circuit; b) detecting at a processor that the ground fault circuit sensed the simulated ground fault signal; c) commanding from the processor a utility power contactor to close while the ground fault interrupt circuit disables closing of the contactor; d) verifying the utility power contactor is not closed in response to the processor commanding the utility power contactor to close while the ground fault interrupt circuit disables closing of the contactor; e) oscillating a pilot signal; f) receiving a request for charging on the pilot signal; g) commanding the utility power contactor to close in response to the request for charging on the pilot signal while the ground fault interrupt circuit is disabling closing of the contactor; h) verifying the utility power contactor is not closed in response to the request for charging on the pilot signal while the ground fault interrupt circuit is disabling closing of the contactor; i) resetting the ground fault interrupt circuit while the processor is commanding the utility power contactor to close; and j) verifying with the processor that the contactor closes after the resetting of the ground fault interrupt circuit while the processor is commanding the utility power contactor to close.
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16. An electric vehicle supply equipment for supplying electrical power from utility power to an electric vehicle, the electrical vehicle supply equipment comprising:
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a) a power cable adapted to connect utility power to an electric vehicle via a contactor; b) a ground fault interrupt circuit capable of detecting a ground fault and controlling the state of the contactor; and c) a processor connected to the ground fault interrupt circuit and connected so as to control the state of the contactor, the processor being configured to perform the steps comprising; (1) providing a simulated ground fault signal to the ground fault interrupt circuit; (2) detecting that the ground fault interrupt circuit sensed the simulated ground fault signal; (3) commanding the contactor to close while the ground fault interrupt circuit is disabling closing of the contactor; and (4) verifying the contactor is not closed in response to commanding the contactor to close. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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25. In an electric vehicle supply equipment for supplying electrical power from utility power to an electric vehicle, a processor configured to:
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a) provide a simulated ground fault signal to a ground fault interrupt circuit; b) detect that a ground fault interrupt circuit sensed the simulated ground fault signal; c) command a utility power contactor to close while the ground fault interrupt circuit is disabling closing of the contactor; and d) verify the contactor is not closed in response to the command to the utility power contactor to close. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32)
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Specification