SU661441A1 - Arrangement for monitoring electric circuit break - Google Patents

Description

(54) DEVICE TO CONTROL ELECTRIC CIRCUIT CIRCUITS

The invention relates to electrical engineering and can be used in electrical energy distribution systems, for example, in power supply devices of automation equipment.

A device for monitoring an electrical circuit breakage is known, having a circuit for signaling the operation of the protection device 1.

However, this device is not sufficiently reliable and has limited application, since it is intended only for individual signaling of the state of protection elements.

It is also known a device for monitoring the breakage of electrical circuits, which has a control circuit for a safety device 2.

However, such a device cannot be used for DC circuits and for monitoring several electrically from circuits connected to the same power source bus. In addition, it does not provide verification of the health of the elements included in them.

The closest in technical essence to the invention is a device for monitoring an electrical circuit breakage, comprising a power source, controlled electrical circuits, one ends of which are connected to a power source, individual alarm circuits, one end of which is connected to the other ends of the controlled electrical circuits and to individual loads, and with their other ends interconnected 3.

A disadvantage of this device is its complexity, low reliability and lack of verification of defects: the wires and components included in the device, as well as the impossibility of using the device in DC circuits and for several circuits connected to the same power source bus.

The aim of the invention is to simplify the device and improve the reliability of the controller.

Claims (3)

This goal is achieved by the fact that the device for monitoring an electrical circuit breakdown contains a power source, terminals for connecting monitored electrical circuits, some of which are connected to a power source, an individual alarm circuit, one end respectively of which is connected to other of these terminals and connected to individual loads, and the other ends interconnected, additionally introduced a chain of general alarm connected to one end with the other ends of the chains ndividualnoy signaling, and the other end is electrically connected with said power source bus (to which are connected the ends of the electrical circuits). In addition, a test block is added to the device containing a normally closed and normally open con, a tact1 at its output, with one source bus running. Through a normally closed circuit, and a friend through a normally open contact connected to the common signal circuit. The drawing shows a circuit diagram of the device. A device for monitoring an electrical circuit breakage contains individual alarm circuits 1, common alarm circuits 2, the end of which is connected through circuits 1 to terminals for connecting monitored electrical circuits 3 connected to individual loads 4, test unit 5, through a normally closed contact of the other end The circuit 2 is connected to the power supply bus 6, to which other leads are connected to connect the circuits 3, and via the normally open contact to the power supply bus 7. Similarly, control of electrical circuits connected to any n number of power supply buses can be performed. In this case, the general alarm unit has n separate inputs, and the unit for checking the health of electrical elements of the device has n pairs of normally closed and normally open contacts. The device works as follows. With good circuits x 3, the input of circuit 2 and all circuits 1 connected to it are shorted by circuits 3. If any of the targets 3 from the bus 7 breaks through the load 4 and the circuit 1 connected to it, circuit 2, a normally closed contact unit 5 checks to the bus 6 current will flow. Chain 2 gives a signal that there is a break in the chain x 3, and chain 1 indicates which circuit is faulty. After the termination of the chain termination 3, the action returns to its original state. To check the health of the device, the device 5 is checked to verify the health of the device, which with its normally-closed contact, disconnects one end of circuit 2 from bus 6 and connects it to bus 7 through a normally-open contact. Through all circuits. 1 and circuit 2 will flow current. All tested serviceable circuits 1 and circuit 2 will give a signal, meaning that all the elements of the device are intact. Faulty circuits 1 and faulty circuit 2 will not give a signal. The invention makes it possible to use the simplest elements made on low-power light sources, with a large number of fuses, provides a significant increase in reliability, simplification, size reduction and cost reduction of the device, and also makes it possible to use it in AC and DC circuits. Claim 1. A device for monitoring an electrical circuit breakage containing a power source, terminals for connecting monitored electrical circuits, one of which is connected to the power supply busbar, an individual signaling circuit, one end of which is respectively connected to other of these terminals and connected to individual loads, and with their other ends interconnected, it is distinguished by the fact that, in order to simplify and increase the reliability of the Kon: trol, an additional circuit about s signaling bonded at its one end to said other kontsa.mi individual signaling circuits and its other end electrically coupled to the power supply bus. 2. The device according to claim 1, characterized in that a verification block with normally open and normally closed contacts is inserted into it, one power supply bus through, normally closed, and the other through normal open contacts connected to a common circuit alarms. Sources of information taken into consideration during the examination 1. US Patent No. 3662369, cl. 340-250, 1972. and. US Patent No. 3696364, cl. 340-252, 1972. 3. The patent of France No. 2076600, cl. G 01 R 31/00, 1971,