Effector with self-compensated contacts for power supply of a receiver circuit
First Claim
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1. An electrical effector, comprising:
- a power supply circuit for supplying power to a receiver provided in a receiver circuit, said power supply circuit including power contacts;
a control circuit including an operating mechanism and a switch provided in series with the operating mechanism, said operating mechanism including an electromagnet for operating the power contacts;
compensation means for applying a compensating force to the power contacts when in the closed position to oppose striction repulsion forces acting on said power contacts due to a short-circuit in the receiver circuit; and
prevention means for preventing closing of the power contacts from the open position under a short-circuit condition in the receiver circuit, said prevention means comprising (i) measuring means for measuring an impedance of the receiver circuit, said measuring means including a comparator to compare a measured impedance with a threshold impedance, (ii) a relay connected to said comparator and to said switch of the control circuit, said relay being actuated by a measured impedance which is below the threshold impedance to drive the switch and open the control circuit thereby preventing closing of the power contacts.
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Abstract
The present invention relates to an effector comprising power contacts for power supply of a receiver. The effector comprises an operating mechanism for the power contacts, this mechanism being actuated by an electromagnet. Between a power circuit for supplying power to the receiver and the return power circuit, there is connected a measuring and processing unit arranged to measure the impedance at the terminals of the power supply circuit of the receiver. This unit is coupled to a contact of the control circuit. The contact is arranged to cut the power supply of the control circuit in the event of a short-circuit of the power supply circuit of the receiver.
12 Citations
8 Claims
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1. An electrical effector, comprising:
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a power supply circuit for supplying power to a receiver provided in a receiver circuit, said power supply circuit including power contacts; a control circuit including an operating mechanism and a switch provided in series with the operating mechanism, said operating mechanism including an electromagnet for operating the power contacts; compensation means for applying a compensating force to the power contacts when in the closed position to oppose striction repulsion forces acting on said power contacts due to a short-circuit in the receiver circuit; and prevention means for preventing closing of the power contacts from the open position under a short-circuit condition in the receiver circuit, said prevention means comprising (i) measuring means for measuring an impedance of the receiver circuit, said measuring means including a comparator to compare a measured impedance with a threshold impedance, (ii) a relay connected to said comparator and to said switch of the control circuit, said relay being actuated by a measured impedance which is below the threshold impedance to drive the switch and open the control circuit thereby preventing closing of the power contacts. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification