CN210120395U

CN210120395U - Circuit breaker electricity keeps control module

Info

Publication number: CN210120395U
Application number: CN201920882943.XU
Authority: CN
Inventors: 仇敏; 胡佳骏; 胡清源; 伊晟; 沈晓燕
Original assignee: Shanghai Tuo And Rail Transit Equipment Ltd By Share Ltd
Current assignee: Sichuan Tuoji Rail Transit Equipment Co ltd
Priority date: 2019-06-13
Filing date: 2019-06-13
Publication date: 2020-02-28
Anticipated expiration: 2029-06-13

Abstract

The utility model provides a circuit breaker electricity keeps control module belongs to track traffic and pulls power supply unit control element technical field. The circuit breaker electric-holding control module comprises elements including a switching-on and switching-off contactor, a switching-on holding contactor, a switching-off relay and a time delay relay; the circuit breaker electricity keeps the control module to include four ports, and first port links to each other with microcomputer measurement and control protection device's separating brake output, and the second port links to each other with microcomputer measurement and control protection device's combined floodgate output, and the third port links to each other with control power supply positive pole, and the fourth port links to each other with control power supply negative pole. The utility model discloses a when fault conditions such as computer measurement and control protection device restart, fall the electricity, direct current quick breaker coil keeps the state of closing a floodgate that has connected, has guaranteed the power supply continuity who pulls power supply system, avoids causing the train outage accident of track traffic operation system.

Description

Circuit breaker electricity keeps control module

Technical Field

The utility model belongs to the technical field of rail transit pulls power supply unit control element, a circuit breaker electricity keeps control module is related to.

Background

When the rail transit traction power supply equipment adopts the electric hold direct current fast breaker, the adopted control scheme is that a microcomputer measurement and control protection device in the rail transit traction power supply equipment directly outputs to a switching-on/off contactor, so that switching-on/off control and switching-on state holding are carried out on a coil of the direct current fast breaker, as shown in fig. 1 and fig. 2.

Fig. 1 is a diagram of a dc quick disconnect coil control loop. Wherein Q0 is a dc quick breaker electrical hold coil; j01 is a switching contactor (2 sets of main contacts in the figure); j1b is a closing holding contactor (2 sets of main contacts in the figure); v1 is a diode module; r01 is a back electromotive force absorption resistance; r02 is a closing holding resistor. Fig. 2 is a diagram of the microcomputer measurement and control protection device directly outputting to the switching-on and switching-off contactor. Wherein A0 is microcomputer measurement and control protection device; j01 is a switching contactor (coil in the figure); j1b denotes a closing holding contactor (coil in the figure); referring to fig. 1 and 2, the control logic of the coil of the prior art dc fast breaker is as follows: 1) switching-on logic: a0 sends out closing/opening output + holding resistance output, J01 and J1b are powered on and closed,

main contacts

1, 2, 3 and 4 of J01 and J1b in the graph 1 are closed, and Q0 is powered on and closed; after 0.5S, the A0 removes the holding resistor output, the closing/opening output remains unchanged, the J1b loses power and opens the switch, the

main contacts

1, 2, 3 and 4 of the J1b in the graph 1 are opened, the R02 is connected into a loop, and at the moment, the Q0 is in a closing holding state; the holding current is 5% of the current at the moment of closing. 2) Switching-off logic: under the closing holding state of the circuit breaker, the closing/opening output is removed by A0, the J01 loses power and opens the switch, the corresponding 1, 2, 3 and 4 main contacts are opened, the Q0 loses power completely, and the opening of the circuit breaker is completed.

From the top, the existing electricity keeping technical scheme only depends on the microcomputer measurement and control protection device to realize the closing keeping of the direct current quick breaker coil, when the microcomputer measurement and control protection device is restarted and fails in power and other fault conditions, the direct current quick breaker coil can be caused to lose power and trip, the power of a contact network power supply system is lost, namely, a locomotive is stopped without power, passengers are alarmed, and serious operation risks are caused to a rail transit operation system.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a circuit breaker electricity keeps control module realizes when fault conditions such as computer observing and controling protection device restart, fall the electricity, and the quick circuit breaker coil of direct current keeps the state of closing a floodgate that has received the electricity, guarantees to pull power supply system's power supply continuity, avoids the train outage accident of track traffic operation system.

In order to achieve the above object, the utility model provides a following technical scheme:

a circuit breaker electric holding control module comprises a switching-on and switching-off contactor, a switching-on holding contactor, a switching-off relay and a time delay relay; the circuit breaker electric-holding control module comprises four ports, wherein a first port is connected with the opening output end of the microcomputer measurement and control protection device, a second port is connected with the closing output end of the microcomputer measurement and control protection device, a third port is connected with the positive electrode of the control power supply, and a fourth port is connected with the negative electrode of the control power supply; the coil of separating brake relay is connected between first port and fourth port, the normally closed auxiliary contact of separating brake relay with the coil of time delay relay is connected between second port and fourth port after establishing ties, the normally open main contact of separating closing contactor is connected between second port and third port, the coil of separating closing contactor with the coil of time delay relay is parallelly connected, the coil of combined closing holding contactor with the normally closed auxiliary contact of time delay relay is established ties the back with the coil of time delay relay is parallelly connected.

According to an aspect of the invention, the delay time set by the delay relay is 0.5 s.

In accordance with an aspect of the present invention, the control power is 24 VDC.

According to an aspect of the utility model, microcomputer observes and controls protection device's separating brake output and combined floodgate output and be 24VDC +.

Due to the adoption of the scheme, the beneficial effects of the utility model are that:

the utility model discloses a circuit breaker electricity keep control module have keep effectual, the reliability is high, long service life, characteristics that installation space is little, fixed setting is in the low-voltage chamber of pulling power supply unit. Compared with the scheme that the microcomputer measurement and control protection device in the existing mainstream rail transit traction power supply equipment directly outputs to the switching-on/off contactor, the method is better; when the microcomputer measurement and control protection device is restarted and fails to work and other fault conditions, the direct current quick breaker coil keeps an electrified and closed state, the power supply continuity of a traction power supply system is ensured, and the train shutdown accident of a rail transit operation system cannot be caused; the microcomputer measurement and control protection device is completely isolated from a circuit of a circuit breaker coil, so that the isolation effect of a low-voltage chamber and a circuit breaker handcart is ensured; the internal elements adopt high-reliability elements, so that the reliable maintenance of the closing state of the circuit breaker is ensured; the integrated and modularized design ensures the simplicity of external interfaces and the clear and definite function distribution, and is convenient for wiring and installation when the rail transit traction power supply equipment is produced.

Drawings

Fig. 1 is a diagram of a dc quick disconnect coil control loop.

Fig. 2 is a diagram of the prior art that the microcomputer measurement and control protection device directly outputs to the switching-on and switching-off contactor.

Fig. 3 is a schematic diagram of the electric holding control module of the circuit breaker of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 3, wherein a0 is a microcomputer measurement and control protection device; x0 is a circuit breaker electrical hold control module. The utility model discloses a circuit breaker electricity keeps control module X0 includes following component: a switching-on/off contactor J01; a closing holding contactor J1 b; a switching-off relay T01; delay relay K1S (set 0.5s delay). The connection mode is as follows: the utility model discloses a circuit breaker electricity keeps control module X0 to have four ports, and the first port links to each other with the separating brake output of computer measurement and control protection device A0, and the second port links to each other with the combined floodgate output of computer measurement and control protection device A0, and the third port links to each other with control power supply 24VDC +, and the fourth port links to each other with control power supply 24 VDC-; the coil of separating brake relay T01 is connected between first port and fourth port, the normally closed auxiliary contact of separating brake relay T01 and the coil of time delay relay K1S are connected between second port and fourth port after establishing ties, the normally open main contact of separating brake contactor J01 is connected between second port and third port, the coil of separating brake contactor J01 and the coil of time delay relay K1S are parallelly connected, the coil of combined brake keeping contactor J1b and the normally closed auxiliary contact of time delay relay K1S are parallelly connected with the coil of time delay relay K1S after establishing ties.

Referring to fig. 3 in combination with fig. 1, the control logic of the dc fast breaker coil in this solution is as follows:

1) switching-on logic: the microcomputer measurement and control protection device A0 sends a closing output command, coils of the opening and closing contactor J01, the closing maintaining contactor J1b and the time delay relay K1S are electrified, a main contact is closed, an electric maintaining coil Q0 of the direct current quick circuit breaker in the figure 1 is electrified and closed, and at the moment,

main contacts

5 and 6 of the opening and closing contactor J01 are closed to form a self-holding loop of the opening and closing contactor J01; after 0.5s, the auxiliary contacts 15 and 16 of the delay relay K1S are opened from a normally closed state, and at the moment, the coil of the closing holding contactor J1b loses power; meanwhile,

main contacts

1, 2, 3 and 4 of a closing holding contactor J1b in the circuit breaker in FIG. 1 are opened, a closing holding resistor R02 is connected into a loop, and at the moment, an electric holding coil Q0 of the direct-current quick circuit breaker is in a closing holding state; the holding current is 5% of the current at the moment of closing.

2) Switching-off logic: under the closing keeping state of the circuit breaker, the microcomputer measurement and control protection device A0 sends out a closing output command, a coil of the closing relay T01 is electrified, auxiliary contacts 11 and 12 corresponding to the closing relay T01 are opened from a normally closed state, a coil of the closing contactor J01 is electrified,

main contacts

1, 2, 3 and 4 of the closing contactor J01 in the graph 1 are opened, the direct-current quick circuit breaker electric keeping coil Q0 is completely electrified, and the circuit breaker is closed.

To sum up, the utility model discloses a microcomputer observes and controls protection device divide-shut brake output and connects to circuit breaker electricity and keeps control module's input, and the key consideration does not rely on the computer to observe and control protection device and realize the combined floodgate of direct current quick circuit breaker coil and keeps in circuit breaker electricity keeps control module design, when fault conditions such as microcomputer observe and control protection device restart, fall electric, direct current quick circuit breaker coil keeps the electric combined floodgate state. The circuit breaker on-off control command of the microcomputer measurement and control protection device is connected to the on-off contactor in the module through the internal loop of the control module, so that the on-off control of the circuit breaker coil is realized, and the microcomputer measurement and control protection device is completely isolated from the circuit breaker coil control loop. The circuit breaker electricity keeps inside the control module to adopt high reliability component. The circuit breaker electric-holding control module adopts integrated and modularized design, has clear function distribution and clear external interface, and is convenient to install wiring in the rail transit traction power supply equipment.

The embodiments described above are described to facilitate understanding and application of the present patent to those of ordinary skill in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the embodiments herein, and those skilled in the art should understand that modifications and alterations made without departing from the scope of the present invention are within the protection scope of the present invention.

Claims

1. A circuit breaker electricity keeps control module which characterized in that: the switching-on and switching-off device comprises a switching-on and switching-off contactor, a switching-on maintaining contactor, a switching-off relay and a time delay relay; the circuit breaker electric-holding control module comprises four ports, wherein a first port is connected with the opening output end of the microcomputer measurement and control protection device, a second port is connected with the closing output end of the microcomputer measurement and control protection device, a third port is connected with the positive electrode of the control power supply, and a fourth port is connected with the negative electrode of the control power supply; the coil of separating brake relay is connected between first port and fourth port, the normally closed auxiliary contact of separating brake relay with the coil of time delay relay is connected between second port and fourth port after establishing ties, the normally open main contact of separating closing contactor is connected between second port and third port, the coil of separating closing contactor with the coil of time delay relay is parallelly connected, the coil of combined closing holding contactor with the normally closed auxiliary contact of time delay relay is established ties the back with the coil of time delay relay is parallelly connected.

2. The circuit breaker electrical retention control module of claim 1, wherein: the delay time set by the delay relay is 0.5 s.

3. The circuit breaker electrical retention control module of claim 1, wherein: the control power supply is 24 VDC.

4. The circuit breaker electrical retention control module of claim 1, wherein: the switching-off output and the switching-on output of the microcomputer measurement and control protection device are 24VDC +.