SU87335A1 - Relay device - Google Patents

Description

The subject of the invention is a relay device for receiving command signals through a two-wire communication lily, effective when the polarity of the current changes.

Known iodine relay devices, consisting of a polarized relay, a time relay and a relay controlling the mechanism, do not eliminate the possibility of the actuator relay triggering in the event of an emergency connection to an external power source.

In the description of the relay device, this disadvantage is eliminated by using a polarized CKR type relay with self-reusing 3N neutral contacts.

The polarized switch of this relay is connected in series with a self-retaining contact and serves to close the circuits of a relay with a time delay and the disappearance or relay of the actuator when the polarity of the current in the line changes.

The drawing shows the principal s.hema relay device.

The use of a polarized relay (CKR) with self-retaining neutral contacts ensures the transfer of any signal from the DS sensor: relieve or apply voltage to the contact network, turn on or suspend the water supply to the pipeline, etc., without any harmful consequences if released extraneous current in the existing wires.

Normally, the relay Rl is under current, and all other relays are de-energized.

When the DSV sensor button on the A button is pressed, its contacts are closed: A, B and C. As a result, power is supplied to the PI relay, which prepares the circuit for polarity reversal in the line wires; a direct current is simultaneously sent to the linear wiresJV 87335- - 2

of laziness, which in the receiver of point B excites a polarized CKR relay, which closes with its contact / (PZ-relay circuit; The latter prepares the relay relay circuit.

At point A, as soon as the Pb relay is energized and after a time delay of about 0.7 seconds, the circuit P of the relay opens, which is de-energized until the next signal is given.

If the power supply to relay P is interrupted, the PI relay circuit is broken and the polarity of the CKP circuit changes.

After the same delay, de-energize the PI relay and disconnect the reverse current from the active (linear) wires.

At point B, at the moment of polarity change, the polarized measles of the CKR relay will break the PZ relay circuit, but its contacts did not open for some time (0.7 sec) due to the presence of deceleration in the Pz relay.

This deceleration is necessary in order for the relay to be energized and blocked. While the PC measles of a polarized CKR relay are moved from the left to the right position, its contact K does not disappear due to the design features of the type of relay.

A contact in the P4 relay circuit serves as a signal for subsequent cycles.

Subject invention

A relay device for receiving command signals over a two-wire communication line, operating when the current polarity changes, consisting of a polarized relay, a time relay and a relay controlling the actuator L1, characterized in that, in order to eliminate the possibility of the actuator relay to operate in case of emergency connection to both wires of the communication line of an external power source, a CKR-type relay with self-holding neutral contacts was used as a polarized relay, polarized which is connected in series with a self-retaining contact to any pole of the current source and serves when changing the polarity of the current in the line to close the circuits or the relay with an exposure of 1 mode to drop, such as an actuator relay.

Point D