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US 2017/0097385 A1Published application
Ground fault detection circuit
AssigneeControl Techniques Limited
InventorsMark Towers, Dylan Wyn Davies
Life of this patent
Estimating the term…
Abstract
A ground fault detection circuit comprising a fuse and a fuse detect circuit. The fuse and the fuse detect circuit are arranged to be coupled in parallel between a reference point and a second point of a monitored circuit for which ground faults are to be detected. The fuse detect circuit is further arranged to detect a fuse break indicative of a ground fault condition and disable at least a portion of the monitored circuit.
Claims20
A ground fault detection circuit comprising:
- a fuse;
- a fuse detect circuit;
- the fuse and the fuse detect circuit being arranged to be coupled in parallel between a reference point and a second point of a monitored circuit for which ground faults are to be detected, wherein the fuse detect circuit comprises a voltage monitor coupled in parallel between the reference point and the second point of the monitored circuit, wherein the ground fault detection circuit further comprises a potential divider coupled between the voltage monitor and the fuse, the potential divider being directly coupled to the fuse, and wherein the fuse detect circuit is further arranged to:
- detect a fuse break indicative of a ground fault condition;
- and
- disable at least a portion of the monitored circuit.
3 more elements
(canceled)
(canceled)
A method of detecting a ground fault comprising:
- Detecting, by a fuse detect circuit a fuse break indicative of a ground fault condition;
- the fuse and the fuse detect circuit arranged to be coupled in parallel between a reference point and a second point of a monitored circuit for which ground faults are to be detected;
- and
- disabling at least a portion of the monitored circuit in response to detecting the fuse break condition;
- wherein the fuse detect circuit comprises a voltage monitor coupled in parallel between the reference point and the second point of the monitored circuit, and wherein the ground fault detection circuit further comprises a potential divider coupled between the voltage monitor and the fuse, the potential divider being directly coupled to the fuse.
2 more elements
(canceled)
(canceled)
Dependencies are inferred from the claim text.