SU1453502A1 - Device for protecting users against wrong polarity of power supply source - Google Patents

Abstract

The invention relates to electrical engineering and is intended for use in consumer power supply systems that do not allow the power supply to be reversed polarity. The purpose of the invention is to reduce power consumption and increase reliability. When the power supply is connected to input terminals 10 and 11 with an arbitrary voltage polarity, it is always supplied to the output outputs with one polarity — plus at pin 12 and minus at pin 13, which is provided by a polarized relay 1 with windings 2 and 3 and groups 01: cycles 4 and 5. Positive potential from input terminal 10 or 11 through the anode - cathode of diode 6 or 7 is supplied through a resistor 9 or 15 to the corresponding winding 2 or 3 polarized relay 1, bridged by a capacitor 8 or 14. If on output 12 and 13 voltage is applied through The contacts 4 and 5 are in the required polarity, the relay 1 retains its original state and does not consume energy. If the voltage at the output terminals 12 and 13 is reversed, the corresponding winding 2 or 3 of the polarized relay is energized and the corresponding capacitor 8 or 14. After charging the capacitor before the relay trips voltage, it subsequently triggers over the corresponding winding, switching groups of 4 and 5 contacts, after which the voltage at the output terminals acquires the desired polarity. After the relay has triggered, there is no power consumption in the winding circuits. 1 il. f 9Я (L

Description

The invention relates to electrical equipment and is intended for use in the power supply systems of consumers, which do not allow (their connection to the power supply with a reverse field of capacity.

The purpose of the invention is to reduce energy consumption and higher reliability.

The drawing shows the scheme of the device.

The device contains polarized relays 1 with the first 2 and second 3 windings, the first 4 and second 5 groups of contacts, the first 6 and second 7 diodes, the first capacitor 8, the first resistor 9, the first 10 and the second 11 input terminals for connection to a power source The first 12 and second 13 output pins for connecting consumers. The first output of the first winding 2 is connected to the first pin of the first capacitor, the first input pin 10 through the anode-cathode of the first diode 6 is connected to the first pin of the first resistor 9, and the second leads of the first 2 and second 3 coils are connected. The device has a second capacitor 14 and a second resistor 15 "The second terminal of the first resistor 9 is connected to the first terminals of the first winding 2 and the first capacitor 8, the first input terminal 10 to the fixed contacts of the first 4 and the second contact of the second contact group pin 11 - with fixed closing contact 11 with the first 4 contact and the opening contact of the second 5 contact groups and through the anode-cathode of the second diode 7 with the first pin of the second resistor 15, the second pin of which is connected to the first pin of the second winding and 3 and the second capacitor 14. The second terminals of the first 8 and second 14 capacitors are connected respectively to the second terminals of the first 2 and second 3 windings, the moving contact of the first group of 4 contacts and the first output terminal. 12, and the second output port 13 is connected to the movable contact of the second group of contacts 5. The opening contacts of groups 4 and 5 of the contacts of relay 1 are understood as such contacts that open when the relay is triggered by the input winding 3, and the short-circuits are contacts that are closed when the relay is triggered by this winding.

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ycTpoffCTBo works as follows.

The power supply in any polarity is connected to the input pins 10. 11 and the load (consumers) is connected to the output pins in accordance with the required polarity.

If the plus power source is connected to the input terminal U, and the minus is connected to step 11, the positive potential of the power source from the input pin III through the closed contacts of the first group of 4 contacts goes to the output terminal 12, and the negative potential from the input terminal 11 through the closed contacts The second group of 5 contacts will go to the output terminal 13. In this case, the device supplies power from the input outputs 10 and 11 to the output pins 12 and 13 and does not consume power from the power source.

If the plus of the power supply is connected to the input terminal 11, and the minus to the input view 10, then along the circuit; plus a power source, input terminal 11, anode-cathode of diode 7, resistor 15, parallel-connected winding 3 relays 1 and a capacitor 14, closed contacts of the thermal circuit 4 contacts, input terminal 10, minus the power supply current flows. Capacitor

14 through limiting resistor

15 is charged before the relay 1 tripping voltage across the winding 3. The relay trips and moves the moving contacts of the first 4 and second 5 groups of contacts

to another position. The power supply circuit of the winding 3 is depleted, plus the source from input terminal 11 through the closed contacts of the first group of 4 contacts is fed to output terminal 12, and the minus power source from input terminal 10 through the closed contacts of the second group of 5 contacts is fed to the output terminal 13. After the relay trips 1 device do not consume energy

If you now connect to the input terminals a power source with reverse polarity (plus input input 10, and minus input 11), then a circuit is formed to trigger relay 1 on winding 2. Relay 1 triggers and flips the moving contacts of the first 4 and second 5 groups contacts to their original position.

Thus, when connected to the input terminals 10 and 11 of a power source with an arbitrary polarity of voltage, it always supplies the output terminals of the device with one polarity: plus - on terminal 12, and minus - on transmitter 13.

The device can be used as an integrated unit: in any electronic equipment supplied from external power sources. In this case, the power supply of the consumers (switching control elements) should be turned on only after the external power source is connected to the input terminals.

Claims (1)

Invention Formula Consumer protection device against power source polarity reversal, containing a polarized relay with first and second windings, first and second groups of contacts, first and second diodes, first capacitor, sertom resistor, first and second input terminals, dp connected to the power source, the first and second output pins for connecting consumers, and the first the output of the first winding is connected to the first output of the first capacitor, the first input output through the anode-cathode of the first diode is connected to the first output of the first resistor, and the second terminals of the first and second windings are connected, in order to reduce power consumption Q and increase reliability, the second capacitor and the second resistor are introduced into it, while the second terminal ne, the p resistor is connected to the first terminals of the first winding and the first 5 capacitors, the first input terminal - with fixed breakers; : the first contact and the closing contact of the second contact group, the second input output - with fixed closing contact, the first cycle and the opening contact of the second contact group and through the anode-cathode of the second diode with the first pin of the second resistor, the second exit of which is connected to the first 5 steps of the second winding and the second  the capacitor, the second pins of the first and second capacitors are connected respectively with the second conclusions first and second windings, movable 0 by the contact of the first group of contacts and the first output terminal, and the second output terminal is connected to the moving contact of the second group of contacts.