SU600648A1 - Arrangement for overload protection of power sources supplying common load - Google Patents

Description

one

The invention relates to the field of monitoring and signaling and can be used in ship power supply systems to monitor the status of power sources operating on a common load.

Devices for controlling power supplies are known, comprising transistors, resistors, diodes, and a signal lamp.

The lack of such devices is their complexity and the lack of individual control over the state of each power source (there is only a generalized signaling that the power supply is not worn).

The closest to the invention to the technical essence is a device for protecting power sources operating on a common load from re-voltages, containing a voltage relay, resistors connected between the positive terminals of the power sources and their uni-negative voltage source, a decoder of the failure of the sources of power, using a pair voltage contacts with series-connected signal lamps, connected between the combined terminals of the power sources.

Such a device is characterized by low reliability due to the fact that the voltage relay stays energized, and the normal operation of the power supply system.

The purpose of the invention is to increase the incidence

operation of the device by ensuring the de-energized state of the voltage relay with a good circuit.

This is achieved by the fact that the proposed device for protection of sources of ntapies working on a common load from non-voltage is additionally equipped with OR elements consisting of diodes according to the number of sources of intans included in the dissecting of the positive terminals of the connection point, and the relay is energized between the positive leads of the power supply. The drawing shows the electrical circuit of the device.

Claims (1)

The device contains 1, 2, 3 current source voltage sources operating at total load 4, relay 5, 6, 7 nanowires connected between the positive terminals of the power supply source, resistors 8, 9, 10 connected in parallel with the nitany sources, deshfrator 11, iia switching contacts 12-17 are voltage relays with series-connected signal lamps 18-20, and an IL-1-1 element consisting of diodes 21-23, the anodes of which are connected to the positive poles of the respective power sources, and the cathodes are connected n to one conclusion n gruzkn 4, the other terminal of which is connected to the power obnish no.iosom petoshikoi. Ustbystvo {) abb1aet following way. During normal operation of sources 1–3, the potential difference across the relay 5–7 is zero, the relay is de-energized and the signal lamps 18–20 are not hot. If any power source fails, for example 1, a current flows through relay 5 and 7 - for the relay 5 for the circuit "+ power supply source 2, relay 5, resistor 10," for power supply source 2, and for relay 7 for the circuit: + power supply 3, relay 7, resistor 9, power supply source 3. Relays 5 and 7 are activated, contacts 12, 13 and 14, 15 of the corresponding relays are closed and signal lamp 18 lights up, indicating a fault in the source 1 of the filament. Similarly, in the event of a malfunction of the power supply 2, the relays 5 and 6 are turned on and the lamp 19 lights up via the make contacts 12, 13 and 16, 17, indicating a malfunction of the power supply 2. In the event of a malfunction of the power source 3, relays 6 and 7 are turned on, contacts 14, 15 and 16, 17 of these relays are closed, and the lamp 20 lights up, signaling a malfunction of the power supply 3. Diodes 21–23 are used to isolate sources 1–3 between each other and to provide 1–5 relays 5–7 for the supply voltage. The magnitude of the resistors 8-10 is selected based on the relay operating current 5-7. Thus, the proposed device is more reliable than the known one, since it provides a de-energized state of the voltage relay when the power supply device is operating properly. The invention The device for protecting power sources operating on a common load from overvoltages, containing a voltage relay, resistors connected between the positive terminals of the power sources and nx a combined negative terminal, a decoder of the power sources fault, made on the voltage relay contacts with series-connected Signal lamps, connected between the combined terminals of the power sources, characterized in that, in order to increase reliability, it is additionally equipped with with an OR element consisting of diodes by the number of power sources included in the dissecting of the positive terminals and their common point, and a voltage relay connected between the positive terminals of the power sources.