JPS5812800B2 - Fukanoenkakusousa Cairo - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a load remote control circuit,
The purpose of this is to prevent the contacts of the relays from flapping when load operating relays are operated in parallel from multiple locations.

That is, in the present invention, diodes 19 and 20 of opposite polarity are connected to the power supply 21 and the contacts 18 and 19 of the coil 16 and self.
A series circuit section 22 is connected in series with a series circuit section 22 consisting of an operating switch 2, a magnetic holding type relay 1, and an operating switch 3 interlocked with the operating switch 2, and the relay 15 is connected in parallel to the series circuit section 22. Magnetic holding type relay 1
It consists of an operating circuit section 23 in which a pair of thyristors 5 and 6 having opposite polarities are connected to both fixed contacts of the fully interchangeable contact and the fixed contacts of the entirely interchangeable contact, and the contacts RO of the operating switches 2 and 3 are closed. The present invention relates to a remote control circuit for a load, characterized in that when the thyristor 5 and the bridge 6 are brought into conduction, the relay 15 operates in reverse.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a load remote control circuit according to the present invention will be specifically described with reference to the drawings.

In the figure, 1 is a magnetically held relay, 2 and 3 are contacts of a two-pole operation switch that is connected to both ends of the magnetically held relay 1 and has a normally closed contact A and a normally open contact B, respectively, and 4 is a magnetically held contact. Contacts 5 and 6 of the type relay 1 are thyristors connected to the switching terminals A and B of the contact 4 in opposite directions, respectively, 7, 8, 9, 10 are resistors, 11, 12, 13,
14 is a capacitor, 15 is a relay that has a coil 16, switching terminals 17 and 18, and diodes 19 and 20 inside, 2
1 is a power source, which uses a low voltage transformer.

The load remote control circuit according to the present invention is constructed as described above, and its operating state will be described next.

In the state shown in the figure, a closed circuit is constructed that passes through the power supply 21 → diode 19 → terminal 17 → relay coil 16 → contact A of contact 2 → magnetically held relay 1 → contact A of contact 3 → power supply 21. , a current in the i1 direction flows through the magnetically held relay 1.

At this time, the contact 4 of the magnetically held relay 1 is in contact with the terminal A side, that is, the thyristor 5 side, but the diode 1
9 and the thyristor 5 are in contact with each other with opposite polarities, in other words, a reverse voltage is applied to the thyristor 5, so it does not operate.

In this state, when the operation switch is operated and the contacts 2 and 3 close the contacts RO and RO, the power supply 21→
Diode 19 → terminal 17 → relay coil 16 → resistor 7
→Contact Lo of contact 3→Magnetic holding relay 1→Contact Lo of contact 2→Resistor 10→A closed circuit of power supply 21 is formed, and the coil 16 of magnetic holding relay 1 is in the opposite direction to the current 11. Since the current 12 flows, the contact 4 makes an inverted contact from the terminal A side to the terminal B side, and the input enters the gate of the thyristor 6, which operates and the power supply 21 → diode 19 → terminal 17 → Relay coil 16→
Terminal lo of contact 4 of magnetically held relay 1 → Thyristor 6 →
A current i0 flows through the closed circuit of the power source 21.

In this way, when current flows through the relay coil 16,
The relay 15 operates and switches the terminal contact, opening the terminal 17 side and closing the terminal 18 side. In this state, the polarity of the thyristor 6 and the polarity of the diode 20 are reversed. Current i0 stops flowing.

Even if the operation switch is returned to its original position and the contacts 2 and 3 are brought into contact again from contact B to contacts A and B, the terminal 18 side remains closed, so the current flowing through the coil of the magnetically held relay 1 will flow in 12 directions. Since there is no change in , contact 4 maintains the state where the terminal B side is closed.

Next, by operating the operation switch again, the contacts 2 and 3 close the terminals RO and RO, and the power supply 21→resistance 10→
Terminal RO of contact 2 → Magnetic retention type relay 1 → Terminal RO of contact 3 → Relay coil 16 → Terminal 18 → Daitode 20 →
Since the power supply 21 is configured as a closed circuit, currents in 11 directions flow through the magnetically held relay 1, so that the gate input to the thyristor 5 is applied and the thyristor 5 is activated.

When the thyristor 5 operates, a current i0' flows through the relay coil 16, thereby opening the terminal 18 and closing the terminal 17.

As described above, the load remote control circuit according to the present invention includes a power supply 21, a relay 15 in which diodes 19 and 20 of opposite polarity are connected to the coil 16 and its own contacts 18 and 19, an operation switch 2, and a magnetic holding A series circuit section 22 consisting of a type relay 1 and an operation switch 3 interlocked with the operation switch 2 are connected in series, and a fully changeable contact of the magnetically held relay 1 and this one are connected in parallel to the series circuit section 22. It consists of an operation circuit section 23 in which a pair of thyristors 5 and 6 having opposite polarities are connected to both fixed contacts of a switching type contact,
When the contacts RO of the operating switches 2 and 3 are closed, the thyristor 5 and 6 are brought into conduction and the relay 15 is turned on.
Since the relays are designed to operate in reverse, when the relays are operated in parallel from multiple locations, the main contacts of the relays will not repeat opening and closing operations even if the operation switches are operated from multiple locations at the same time. It has the effect of preventing welding and burnout.

[Brief explanation of the drawing]

The drawing is an electrical circuit diagram showing an embodiment of a load remote control circuit according to the present invention. 1... Magnetic holding type relay, 2... Operation switch contact, 4... Magnetic holding type relay 1
Contacts, 5, 6... Thyristor, 7, 8, 9,
10...Resistance, 11,12,13,14...
...Capacitor, 15...Relay, 16...
...Coil, 17,18...Switching terminal, 1
9, 20... Diode, 21... Power supply, 22... Series circuit section, 23... Operation circuit section.

Claims (1)

[Claims] 1. A power supply 21, a relay 15 in which diodes 19 and 20 of opposite polarity are connected to the coil 16 and its own contacts 18 and 19, an operation switch 2, a magnetic holding type relay 1, and an operation switch 3 that interlocks with the operation switch 2. A series circuit section 22 consisting of the above is connected in series, and in parallel to the series circuit section 22, a fully changeable contact of the magnetic retention type relay 1 and both fixed contacts of the fully changeable contact are connected in parallel to each other, and a pair having opposite polarity to each other is connected in parallel to the series circuit section 22. thyristors 5 and 6 are connected to each other, and when the contacts B of the operation switches 2 and 3 are closed, the thyristor 5 or 6 is brought into conduction and the relay 15 is operated in reverse. A load remote control circuit featuring: