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公开(公告)号：US11175349B2
公开(公告)日：2021-11-16
申请号：US16437569
申请日：2019-06-11
Applicant: Eaton Intelligent Power Limited
Inventor： Chaitanya Bhalwankar , Birger Pahl , Steve Schmalz , Galen Chui
Abstract: An electrical system includes a ground fault detection unit including a low frequency ground fault detection circuit and a high frequency ground fault detection circuit, and/or a ground fault control unit connected to the low frequency ground fault detection circuit and the high frequency ground fault detection circuit. The ground fault unit may be configured to detect a ground fault according to an output of the low frequency ground fault detection circuit and/or an output of the high frequency ground fault detection circuit. The electrical system may include a first current sensor connected to the low frequency ground fault detection circuit and/or a second current sensor connected to the high frequency ground fault detection circuit.
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公开(公告)号：US11204396B2
公开(公告)日：2021-12-21
申请号：US16437527
申请日：2019-06-11
Applicant: Eaton Intelligent Power Limited
Inventor： Chaitanya Bhalwankar , Birger Pahl , Steve Schmalz , Galen Chui
Abstract: A method of monitoring an electrical system may include providing a ground fault detection unit, operating a transformer rectifier unit to provide DC power to a load, sensing, via a current sensor, a ground current at or about an output of the transformer rectifier, and/or monitoring a sensor output from the current sensor via the ground fault detection circuit. The ground fault detection circuit may be configured to detect ground faults at frequencies of at least 30 kHz.
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