SU45188A1 - Device for signaling the shutdown of electrical installations, such as transformers - Google Patents

Description

The proposed device is intended to signal the shutdown of electrical installations, for example, transformers, and refers to a known kind of device in which a relay connected to the signal circuit is used to control the contact closure of the signal circuit, and also an interrupter used in signaling devices is installed at the transmitting station. current, made in the form of a disk, located on one side under the action of the load, and on the other - under the action of a solenoid connected to the load-closed circuit.

The proposed device differs from a similar kind of signaling device in that the receiving station (for example, in the duty room) is equipped with a second current interrupter controlled from the relay included in the signal circuit, according to the number of closures of the signaling device, which determines the number of the unit turned off. This achieves the ability to control more installations.

The drawing shows a diagram of the proposed device.

In the phase wires of the protected installation, for example, a transformer /, after the knife switch 2 and fuses 3, coils are connected, 5, 6 relays (J, which also has an opposing charger for 4, 5, 6 coils 7 ,, / included in {zero the wire is the earth used in the proposed device as a signal circuit. When the core is in the upper position, relay 8 closes the contacts P of the coil 7 circuit, and when the bottom position contacts the coil 7, the coil 1J of the relay 12 is activated, which controls the closure : relay 5 contacts 10, in the cat The rudder includes a coil / 5 relay / #, which produces a locking under the influence of loads 17, 19 and a core connected to the same circuit of the coil 20 of the disk 75. On the way of the loads 17, 19, the closures 18 of the primary winding 22 that they close transformer and pins 2 / coil circuit 20. The primary winding 22 of the transformer is connected via contacts 18 to the phase conductors up to the fuses, and the secondary winding 2 is connected to earth and the neutral conductor of the network, but the coil circuit 7, 7 /. Coils 20 are connected to the phase conductors up to the fuses. The device uses ground and neutral wires as the return and return wires, in the circuit of which, at the receiving station, relay 77 is connected, which controls j 2 locking via the j 2 core.

-Disc 5 under load 4 and core of coil 77 attached to zero and phase wires, in the circuit of which there are W contacts, lockable relays 7. On the way of load 4 4 contacts of the primary winding b of the transformer are installed the neutral wire connected to the circuit is the earth; the bell 8, the warning light 9 and other similar devices are included in the secondary winding 7 of the transformer.

When the fuse 3 1 blows (at least one), the fallen core of relay 8 closes contacts 10, since one or several of the three coils 4, .5, b are turned off. As a result, the circuit will be closed: phase, contacts 10, contacts 16, coils 75, neutral wire. The core of the coil 75 is drawn in, the dog 7 of the core releases the disk 75. The loads 77 and 7P fall, the load 77 closes the contacts 18. As a result, the circuit is closed: phase, contacts 18, transformer primary winding 22, another phase. In the secondary winding 23 of the transformer is an electromotive force. As a result, the following circuit will be closed: the secondary winding 23 of the transformer, the neutral wire, the relay winding 7 in the de: electrical room of the electrical network,

land The pusher of the core 2 releases the disk 5, the load 4 falls and closes the contacts 5. The fall of the load 4 in time will be equal to the fall, the load 19 after the closure and the load 77 of the contacts T8. According to the number of the transformer substation, the contacts 5 are sequentially closed with a load of 4 several times.

The load 77 remains on pins 18, and the load 19 continues to fall until it closes the contacts 27. The fall time of the load is 19 different for different transformers of substations. Therefore, the drop in load 4-B, the duty room will be different in time for different transformers of substations. Consequently, there will be an unequal number of contacts 5 once closed. As soon as the contacts are closed, the contacts 27 with the load 19, turn out to be a closed circuit: phases, contacts 21, coil 20, another phase. As a result, the heartbeat and the load 19 are connected to the coil 20, and then the load 77 opens the contacts 21 VI 18 — the electromotive force will immediately cease to be induced in the secondary winding of the transformer. Coil 7 will be de-energized, the coil rod G will fall and close contacts 10. As a result, the circuit will be closed: phase, contacts 10 coil 77 volts no core and load 4 will go up to disk 5. Since contacts 27 are open, the cycle repeats again and etc.

During each cycle, a certain number of contacts 5 will be closed, and light and sound signals will be given sequentially and as many times through the bell transformer for each cycle.

So that the other substations, if their shutdown coincides with the switched off already, do not mix the signals with the turned off station, there is a coil 7 and a coil 7 / at each substation.

As long as there is (during a signal from any substation) voltage in the null-ground circuit (with devices), coil 7 / and coil 7 will be under voltage at the other substations and therefore even in the absence of current in all coils 4 , 5 b the core will be retracted into the coil 7, equal to three coils, and contacts 9 will be closed, and contacts 10 and 76 will be open,. Consequently, at all other substations, except for the signal, the coil 75 will not be under voltage and the disk will be fixed.

As soon as the substation disconnected on its low-voltage side, it stopped giving C1; 1 signals, i.e., in the circuit the zero wire-ground no current was circulating; then immediately at another substation with de-energized coils 4, 5 VI b the coil 7 will be de-energized and.

Therefore, relay 8 will operate already at this substation and the cycle repeats for it, and the first substation will wait for the cycle to complete at the second substation. Consequently, in the duty room of the power grid, signals will be heard from one substation or from another.

The subject matter of the invention.

A device for signaling the shutdown of electrical installations, for example

measures, transformers, with the use of a relay connected in the circuit that controls the contact of the signal circuit, and using a current interrupter in the form of a disc on one side under the action of the load, and on the other under the action of the circuit interlocked a solenoid circuit, characterized by the use of a second relay installed at the receiving station and controlled from a current relay / breaker 3 included in the signal circuit, according to the number of contact closures of the signal device, which determines with the number off the installation.