Patent ID: 8867184
Filing Date: 2014-10-21
Classification: G06F,H02J

Abstract:
1. An electrical circuit comprising a power supply, a load, first and second trunks disposed therebetween and a control circuit which controls the electrical status of the first and second trunks, in which the control circuit comprises a first current sensor disposed on the first trunk and a second current sensor disposed on the second trunk which monitor the current of the first and second trunks respectively and detect current events which are indicative of faults occurring thereon, and an isolation device which isolates the first or second trunk when the first current sensor or the second current sensor respectively detects a current event which is indicative of a fault occurring thereon, in which the first and second trunks are electrically connected and arranged in parallel such that the power supplied to the load is distributed substantially equally between them, in which the control circuit is adapted to drive the isolation device to isolate the first or second trunk if the corresponding first or second current sensor detects a current below a low current trip value or above a high current trip value, said low current trip value and said high current trip value being respectively below and above an expected minimum and maximum working current of the load in which the control circuit comprises a compensation circuit which prevents the control circuit from driving the isolation device to isolate said first trunk when the current thereon reaches said low current trip value as a result of a short circuit on said second trunk, and in which the compensation circuit also prevents the control circuit from driving the isolation device to isolate said second trunk when the current thereon reaches said low current trip value as a result of a short circuit on said first trunk.