SU78052A1 - A device for remote control of a traction substation with sectional disconnectors of a contact network - Google Patents

Description

g A device is known for remote control of sectional disconnectors of a contact network with traction nodstantsin by sending signals over contact wires. In the known devices of this kind, signals are supplied in the form of alternating current pulses, which are sent to the contact wire after briefly removing the worker and alternating devices from it. An actuating relay powered by a transformer connected to a catenary is provided for controlling the disconnector drive circuit. The disadvantage of all these devices is that they, by providing a remote disconnection of the sectionalizer, do not allow its remote activation. In addition, they require a special foreign source of food. In the proposed device, these disadvantages are arranged due to the presence in the drive of the disconnector of two coils (switching on and off), fed by a direct current from the contact wire through a double-winding end switch. FIG. 1, 2 and 3 is a schematic diagram of the proposed device in three versions. The drive of the sectional disconnector P is supplied with two coils: B - inclusive and O - disconnecting, which are supplied with constant current from the contact network. In the power supply circuits of these cutters, the Oi and B contacts of the actuating relay of the IR are included, which ensure the difference in the power supply of the coils O and B. The executive relay of the IR has two before and KB coils connected to the secondary winding of the transformer T. interlocking -Q nhmvhtson (, and OV, mottstirovanny on the drive disconnector.

No. 78052-2 -

The primary winding of the transformer T is connected between the contact wire K and the ground.

The device works as follows.

When the sectional disconnector P is open, the disconnecting coil O of its driver is under operation. At the same time, in the value of the secondary winding of the transformer T, the current does not flow.

In order to close the section disconnector P, the working equipment is removed from the contact bridge and alternating current is supplied from the substation for 1-2 seconds. In this case, an emf is generated in the secondary winding of the transformer T, as a result of which the coil K of the operating relay IC is energized. The latter opens the contacts Oi and closes the contacts B. After that, the supply of the contact wire with alternating current is stopped and the operating voltage of the direct current is again applied. At the same time, a coil B of the drive of a sectional disconnector is energized, ensuring the closure of its working contacts P.

The auxiliary contacts of the OS about the disconnecting device disconnect and the contacts of the actuator are closed, preparing the circuit for the subsequent disconnection process.

The disconnecting sectionalizer disconnects in the same order: the operating voltage of the contact wire is removed, a short alternating current pulse of 1-2 seconds is applied to it, after which the operating voltage is switched on again.

In order to avoid a false actuation of the HP executive relay from direct current, the device circuit includes the inclusion of the intermediate relay I in the secondary circuit of the transformer G (Fig. 2) and the connection of the primary coil of the transformer to the contact wire K through an auxiliary contactor. In order to avoid a constant pit) and coils O and B, additional interlocking contacts OB and OBD of the drive of the sectional disconnector P. are included in their circuit.

In the case of the need for control from both neighboring substations, the following basic additions are made to the device circuit (Fig. 3):

a) transformer T must have two identical windings TI and Gj in series with which capacitors / d and

b) the disconnecting and activating coils of the drive of the section disconnector should have two electrically independent windings O and 0 V and

c) actuating relays IL must have an additional pair of contacts Och and Bl, similar to Oi and B.

Subject matter

Claims (2)

1. A device for remote control of a traction substation with sectional disconnectors of the contact network by means of alternating current pulses sent over the contact wire after briefly discharging the operating voltage from it, using a transformer to power the actuating relay, the control circuit of the disconnector drive, characterized By the fact that, in order to enable both the on and off of the disconnector without the use of an unauthorized power source, the disconnector’s drive has th and breaking katuschki fed raznovremenno constant current from a trolley wire through a contact dvuhobmogochnogo executive relay in the circuit the secondary winding of the transformer, in which the primary winding is connected between the contact wire and ground. 2. The device according to claim 1, characterized in that in order to avoid the false actuation of the executive relay from direct current, an intermediate relay is connected to the secondary circuit of the transformer, and the primary winding of the transformer is connected to the contact wire through an auxiliary contactor. /// 7 /////////////// 7 // // j.08o -SOSj / V //////////////// 7 7 FIG. Z