Plug-In Electric Vehicle Charger Validation and Test Device
First Claim
1. A process for performing a ground fault test of a device that delivers power to a load via one or more power lines, the process comprising:
- selecting a current level from a plurality of current levels that differ from one anothergenerating a ground fault current between a first power line of the one or more power lines and ground at the selected current level until a ground fault interrupter within the device trips in response to the ground fault current, or until expiration of an on-time interval associated with the selected current level, whichever occurs first,after generating the ground fault current at the selected current level, setting the ground fault current to zero for an off-time interval associated with the selected current level, andrepeating the selecting, generating, and setting for each of the plurality of current levels, whereinwhen the ground fault interrupter within the device trips, the process further comprising reporting the selected current level at which the ground fault interrupter tripped and a time interval from an onset of the ground fault current at the selected level and a time when the ground fault interrupter tripped.
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Abstract
A process and apparatus for performing a ground fault test of a device is disclosed. A current level may be selected from a plurality of predetermined current levels. A ground fault current may be generated between a first power line and a ground at the selected current level until a ground fault interrupter within the device trips, or until expiration of an on-time period associated with the selected current level. The ground fault current may then be set to zero for an off-time period associated with the selected current level. The process may be repeated for each of the plurality of current levels. When the ground fault interrupter within the device trips, the current level and a time interval from an onset of the ground fault current at the selected level and a time when the ground fault interrupter tripped may be recorded.
25 Citations
11 Claims
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1. A process for performing a ground fault test of a device that delivers power to a load via one or more power lines, the process comprising:
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selecting a current level from a plurality of current levels that differ from one another generating a ground fault current between a first power line of the one or more power lines and ground at the selected current level until a ground fault interrupter within the device trips in response to the ground fault current, or until expiration of an on-time interval associated with the selected current level, whichever occurs first, after generating the ground fault current at the selected current level, setting the ground fault current to zero for an off-time interval associated with the selected current level, and repeating the selecting, generating, and setting for each of the plurality of current levels, wherein when the ground fault interrupter within the device trips, the process further comprising reporting the selected current level at which the ground fault interrupter tripped and a time interval from an onset of the ground fault current at the selected level and a time when the ground fault interrupter tripped. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus for performing a ground fault test of a device that delivers power to a load via one or more power lines, the apparatus comprising:
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a first controllable current generator connect to generate a first ground fault current between ground and a first power line of the one or more power lines; and a controller coupled to the first controllable current generator, the controller configured to perform actions including; selecting a current level from a plurality of current levels that differ from one another, controlling the first controllable current generator to generate a ground fault current at the selected current level until a ground fault interrupter within the device trips in response to the ground fault current, or until expiration of an on-time interval associated with the selected current level, whichever occurs first, after controlling the first controllable current generator to generate a ground fault current at the selected current level, controlling the first controllable current generator to set the ground fault current to zero for an off-time interval associated with the selected current level, and repeating the selecting and controlling actions for each of the plurality of current levels, wherein when the ground fault interrupter within the device trips, the actions performed further include reporting the selected current level at which the ground fault interrupter tripped and a time interval from an onset of the ground fault current at the selected level and a time when the ground fault interrupter tripped. - View Dependent Claims (7, 8, 9, 10, 11)
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Specification