CN104241014B - Vacuum circuit-breaker separating brake, closing coil protection controller and method - Google Patents

Abstract

The present invention relates to a kind of vacuum circuit-breaker with point, closing coil protection controller and method, comprise binding post, divide-shut brake signal lamp and point, combined floodgate master control circuit plate, described point, combined floodgate master control circuit plate comprise separating brake Master control chip, combined floodgate Master control chip, separating brake power rectifier unit, power switch rectification unit, delay cut-off loop, separating brake voltage detection unit, switching voltage detecting unit, switching winding drive electronic switch, closing coil drive electronic switch; Described delay cut-off loop, coil breakage indicating member are connected to Master control chip; Described switching winding drives electronic switch to connect separating brake main control chip by delay cut-off loop; Described closing coil drives electronic switch to connect combined floodgate main control chip by delay cut-off loop; Described separating brake power rectifier unit is connected on separating brake main control chip by separating brake voltage detection unit; Described power switch rectification unit is connected on combined floodgate main control chip by switching voltage detecting unit, and described coil breakage indicating member is connected respectively to divide-shut brake signal lamp.To the invention solves point, technical barrier that closing coil often burns.

Description

Vacuum circuit breaker opening and closing coil protection controller and method

technical field

The invention relates to the technical field of vacuum circuit breaker protection, in particular to a secondary circuit protection device for protecting the opening and closing coils of a high-voltage circuit breaker, and more specifically to a protection controller for the opening and closing coils of a medium-voltage vacuum circuit breaker and methods.

Background technique

In the opening and closing circuits of the existing vacuum circuit breakers, the opening and closing coils often burn out, which brings a lot of trouble to the relay protection work. The cause of the failure is caused by the following points: 1. The circuit breaker The operating mechanism is stuck and refuses to move; 2. The auxiliary contact is stuck due to long-term use, insufficient capacity, arcing, etc.; 3. The position of the auxiliary contact does not completely correspond to the position of the switch state, and the action is not coordinated properly. The above situations will cause the opening and closing current to act on the opening and closing coils for a long time, so that the coils will be burned, which will affect the safe and reliable power supply. In addition, the application of automatic control technology is becoming more and more common nowadays. The opening and closing of the switch mostly adopts the remote control mode. Once the opening and closing failure occurs, not only the coil will be burned, but other equipment will be involved, which will further expand the accident and cause greater losses. .

Contents of the invention

Aiming at the deficiencies in the literature in the related technical field and the above existing technologies, on the basis of a large number of existing literature research and long-term research and development practice in the related field, the present invention proposes "an intelligent controller and method for vacuum circuit breaker protection with opening and closing coils ", overcame the technical problems in the prior art such as "often opening and closing coils burnt out", realized "simple wiring, easy maintenance, safe and reliable, less investment, quick results, and can reduce operating time, prolong The beneficial effect of improving the service life of the coil and improving the success rate of operation.

In order to achieve the above object, the present invention is achieved through the following technical solutions: a vacuum circuit breaker open and close coil protection controller, including terminal blocks, open and close signal indicator lights, and open and close main control circuit boards. The opening and closing main control circuit board includes the opening main control chip, the closing main control chip, the opening power rectification unit, the closing power rectification unit, the delay power-off circuit, the opening voltage detection unit, and the closing voltage detection unit. unit, the opening coil driving electronic switch, the closing coil driving electronic switch and the coil disconnection indicating unit; the delay power-off circuit is respectively connected with the opening main control chip and the closing main control chip; the opening coil driving electronic The switch is connected to the opening main control chip through the delay power-off circuit; the closing coil drives the electronic switch to connect the closing main control chip through the delay power-off circuit; the opening power rectifier unit is connected to the main control chip through the opening voltage detection unit On the opening main control chip, the closing power supply rectifier unit is connected to the closing main control chip through the closing voltage detection unit; the opening main control chip and the closing main control chip are respectively connected to the coil disconnection indicating unit, The coil disconnection indication unit is connected to the opening and closing signal indicator light; the power rectification unit is used to convert AC to DC through a rectifier after receiving the power signal; the opening main control chip and closing main control chip It is used to collect voltage signals, control the delay power-off circuit, and provide the closing signal and opening signal of the closing coil driving the electronic switch and the opening coil driving the electronic switch; the delay power-off circuit is set with a delay time of 3 seconds, The opening main control chip and the closing main control chip respectively collect the action time of the opening magnet and the closing electromagnet, delay the action of the power-off circuit for more than 3 seconds, and cut off the opening and closing signals.

The opening coil drives the electronic switch, and the closing coil drives the electronic switch to receive the opening signal and closing signal provided by the main control chip for opening and the main control chip for closing, and give the opening command to the opening coil and the closing signal to the closing coil. command to make the opening coil and closing coil act.

The opening and closing signal indicator light is connected in series in the opening and closing circuit, and the opening and closing action is successful, and the signal light is on.

A method for protecting and controlling the opening and closing coils of a vacuum circuit breaker. The method includes the following steps: Step 1. If the opening and closing signals of the circuit breaker are normal, the opening coil drives the electronic switch and the closing coil drives the electronic switch. The brake circuit is connected, the opening and closing coil operates normally, the opening and closing circuit is cut off, and at the same time the coil disconnection indicates that the circuit is connected and the opening and closing signal indicator light is on; Time 3s, if the fault still exists after 3s, the opening coil drives the electronic switch and the closing coil drives the electronic switch to close, the opening and closing circuit is turned on and off, the opening and closing coil does not act, if the opening and closing is not normal, the coil is disconnected Indicating that the circuit is not connected, the opening and closing signal indicator light is not on.

The invention has the beneficial effects of simple wiring, easy maintenance, safety and reliability, less investment, quick results, reduced operating time, extended coil service life, improved operating success rate, high economic and practical value, and low labor intensity. Low, good intelligence, easy to popularize and use.

Description of drawings

Fig. 1 is the control principle schematic diagram of the specific embodiment of the present invention;

Fig. 2 is the schematic diagram of the opening and closing circuit structure of a specific embodiment of the present invention;

Fig. 3 is a diagram of the appearance result of a specific embodiment of the present invention.

detailed description

Below, referring to the accompanying drawings, through the description of the embodiments, the specific implementation of the present invention, such as the control system involved, the mutual connection relationship, and the implementation method, are further described in detail, so as to help those skilled in the art understand the present invention Have a more complete, accurate and in-depth understanding of the inventive concepts and technical solutions.

The invention provides an intelligent controller for opening and closing coil protection of a vacuum circuit breaker. The intelligent controller is mainly composed of a terminal block, an opening and closing signal indicator light, and an opening and closing main control circuit board. It is characterized in that: The opening and closing main control circuit board is mainly composed of the opening and closing main control chip, power rectification, delay power-off circuit, and coil-driven electronic switch; the power rectification passes through the rectifier after receiving the power signal. Converting to DC: the main control chip for opening and closing the gate collects voltage signals, controls the delay power-off circuit, and provides coil-driven electronic switch opening and closing signals, and the delay power-off circuit is set for a delay time of 3 seconds , The main control circuit chip of the opening and closing gate collects the action time of the opening and closing electromagnet, and the power-off circuit action cuts off the opening and closing signals after a delay of more than 3 seconds. The coil-driven electronic switch receives the opening and closing signals provided by the main control chip for opening and closing, and gives opening and closing commands to the opening and closing coils to make the opening and closing coils act. The opening and closing signal indicator light is connected in series in the coil disconnection indicating circuit, and connected in parallel in the opening and closing circuit. The opening and closing operation circuit is normal and the opening and closing coils operate successfully, and the signal light is on when the opening and closing are normal. Delayed power-off circuit and coil disconnection indication are used separately for opening and closing. There is no connection relationship between the opening control chip and the closing control chip. The coil disconnection indication circuit is connected with the opening and closing signal indicator light respectively. The coil disconnection indication is a circuit connected in parallel in the opening and closing circuit. When the opening and closing circuit is normal, the coil acts to open and close normally. When the opening and closing circuit is cut off, the coil disconnection indication circuit is connected, and the signal light is on, otherwise it is not on.

Since the intelligent controller for opening and closing coils of the vacuum circuit breaker provided by the present invention integrates a time-delay opening circuit in the opening and closing circuits, the time-delayed opening and closing can be realized without disappearing the closing signal. The opening and closing operation circuit makes the opening and closing coils demagnetized, so as to avoid the opening and closing coils from being burned out by the excitation current for a long time during the operation, especially the integrated switching and closing main control chips of this intelligent controller can Collect the voltage signal, set the delay power-off time 3S, and connect the delay power-off circuit in series in the opening and closing circuit, which will not affect the normal opening and closing operation under normal conditions. When the contact is abnormal (such as contact adhesion , when the contact is deformed) or undervoltage or the mechanism is stuck, according to the main control chip acquisition coil action time exceeds 3S to cut off the opening and closing circuit, to avoid continuous action when the opening and closing signal comes, resulting in long-term electrification of the opening and closing coil , shorten the service life of the opening and closing coils, and reduce power safety; the controller is connected with an opening and closing signal indicator light. When the circuit is normal, the opening and closing coil action signal indicator displays a red light. Normal information, when there is a fault The signal indicator light is not on, which is convenient for maintenance and positioning. The invention has simple wiring, easy maintenance, safety and reliability, less investment, quick results, and can reduce operating time, prolong the service life of the coil, improve the success rate of operation, and have high economic and practical value. , and low labor intensity, good intelligence, easy to popularize and use.

Professionals can further realize that the execution steps described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. Whether these functions are executed by hardware or software depends on the technology. Specific application and design constraints of the scheme. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.

The present invention is not limited to the above-mentioned specific embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention. These corresponding modifications to the present invention or Equivalent replacements shall fall within the scope of protection of the claims of the present invention.

Claims (4)

1. a vacuum circuit-breaker with point, closing coil protection controller, comprise binding post, divide-shut brake signal lamp and point, combined floodgate master control circuit plate, it is characterized in that: described point, combined floodgate master control circuit plate comprises separating brake main control chip, combined floodgate main control chip, separating brake power rectifier unit, power switch rectification unit, delay cut-off loop, separating brake voltage detection unit, switching voltage detecting unit, switching winding drive electronic switch, closing coil to drive electronic switch and coil breakage indicating member; Described delay cut-off loop is connected with separating brake main control chip and combined floodgate main control chip respectively; Described switching winding drives electronic switch to connect separating brake main control chip by delay cut-off loop; Described closing coil drives electronic switch to connect combined floodgate main control chip by delay cut-off loop; Described separating brake power rectifier unit is connected on separating brake main control chip by separating brake voltage detection unit, and described power switch rectification unit is connected on combined floodgate main control chip by switching voltage detecting unit; Described separating brake main control chip and combined floodgate main control chip are connected respectively to coil breakage indicating member, and described coil breakage indicating member is connected to divide-shut brake signal lamp; Described power rectifier unit is used for transferring direct current through over commutation device to by interchange after receiving power supply signal; Described separating brake main control chip, combined floodgate main control chip, for gathering voltage signal, control delay cut-off loop, provide closing coil to drive electronic switch and switching winding to drive switching signal and the sub-gate signal of electronic switch; Described delay cut-off loop arranges 3 seconds delay times, gathers separating brake magnet, making electromagnet operate time respectively by separating brake main control chip and combined floodgate main control chip, more than 3 seconds delay cut-off circuit behavior, to cut off point, switching signal.

2. controller according to claim 1, it is characterized in that: described switching winding drives sub-gate signal, the switching signal that electronic switch, closing coil drive electronic switch reception separating brake main control chip, combined floodgate main control chip provides, to the instruction of switching winding separating brake, closing coil reclosing command, make switching winding, closing coil action.

3. controller according to claim 1, is characterized in that: described divide-shut brake signal lamp is connected on point, in closing circuit, point, feed motion success, signal lamp is bright.

4. a kind of vacuum circuit-breaker use according to claims 1 to 3 any one claim is divided, closing coil protecting control method, it is characterized in that: the method comprises the following steps:

If step one breaker open operation, switching signal are normal, switching winding drives electronic switch and closing coil to drive electronic switch to start, divide-shut brake loop is connected, divide-shut brake coil motion is normal, and it is bright that divide-shut brake cuts off the divide-shut brake loop loop connection of coil breakage instruction simultaneously divide-shut brake signal lamp;

Step 2, if there is fault, start-up study power-off loop, delay time 3s, if still existed more than 3s fault, switching winding drives electronic switch and closing coil to drive electronic switch to close, the on-off of divide-shut brake loop, divide-shut brake coil is failure to actuate, and divide-shut brake is abnormal, and coil breakage instruction loop is disconnected divide-shut brake signal lamp and do not worked.