CN208352237U - A kind of control circuit of dc circuit breaker divide-shut brake - Google Patents
A kind of control circuit of dc circuit breaker divide-shut brake Download PDFInfo
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- CN208352237U CN208352237U CN201820992067.1U CN201820992067U CN208352237U CN 208352237 U CN208352237 U CN 208352237U CN 201820992067 U CN201820992067 U CN 201820992067U CN 208352237 U CN208352237 U CN 208352237U
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- closing coil
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- contactor
- circuit breaker
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Abstract
The utility model relates to a kind of control circuits of dc circuit breaker divide-shut brake, belong to dc circuit breaker control technology field.The utility model is in dc circuit breaker separating brake, apply the electric current opposite with closing coil main circuit at closing coil both ends, reverse charging is carried out to closing coil, eliminates the remanent magnetism of closing coil core material, the opening velocity of closing coil is improved, provides guarantee for quick acting switching-off.
Description
Technical field
The utility model relates to a kind of control circuits of dc circuit breaker divide-shut brake, belong to dc circuit breaker control technology neck
Domain.
Background technique
In low voltage power distribution network, the failure for being easiest to occur and be easiest to damage is exactly short circuit.Breaker is to keep away
Exempt from the most effective electrical equipment that short trouble causes more havoc, it is necessary to have good short circuit making capacity and short circuit breaking
Ability.
For the divide-shut brake functional requirement for meeting breaker, to the operating mechanism of breaker usually using machines such as spring, air pressures
Tool operating mechanism and electromagnetic operating mechanism matching design.But in the failure that breaker occurs, mechanical breakdown proportion is higher,
This is because mechanical device usually has, structure is complicated, security risk is difficult to exclude, higher to operating environment requirements etc. many unfavorable
Factor.In contrast, electromagnetic operating mechanism has many advantages, such as simple structure, low manufacture cost, higher reliability, therefore disconnected
Answered in the operating mechanism of road device it is as much as possible using electromagnetic mechanism so that breaker work is relatively reliable.
Being widely popularized and applying with direct current transmission and distribution, the importance of dc circuit breaker is increasingly prominent to be come out.In direct current
In breaker, the mechanical dc circuit breaker developed by AC circuit breaker is because of originals such as cost is relatively low, technology is more mature
Because being widely applied.Dc circuit breaker has completely different application environment, dc circuit breaker compared with AC circuit breaker
During the opening process, the main circuit for disconnecting closing coil makes closing coil power loss, realizes the sub-switching operation of breaker, but
During this, using the closing coil of breaker of ferromagnetic material, there are remanent magnetism, affect the quick acting switching-off of breaker.
Utility model content
The purpose of the utility model is to provide a kind of control circuits of dc circuit breaker divide-shut brake, to solve dc circuit breaker
In separating brake since closing coil has that remanent magnetism influences opening velocity.
The utility model provides a kind of control circuit of dc circuit breaker divide-shut brake to solve above-mentioned technical problem, including
The main circuit of closing coil, the both ends of the closing coil are simultaneously connected to the charging branch contrary with closing coil main circuit current
Road, the charging paths are used in dc circuit breaker separating brake, and are carried out when the main circuit disconnection of closing coil to closing coil reversed
Charging.
The utility model applies opposite with closing coil main circuit in dc circuit breaker separating brake at closing coil both ends
Electric current carries out reverse charging to closing coil, eliminates the remanent magnetism of closing coil core material, improves the separating brake speed of closing coil
Degree, provides guarantee for quick acting switching-off.
Further, in order to guarantee that, in dc circuit breaker separating brake, closing coil can thoroughly discharge, the closing coil
Both ends also and are connected to discharge paths, which includes the sub-gate resistance and freewheeling diode of concatenation, which is used for
The main circuit of closing coil discharges to closing coil after disconnecting.
Further, after in order to guarantee the power-off of closing coil major loop, closing coil can discharge, the discharge paths
On be serially connected with the normally-closed contact of the time relay.
Further, in order to guarantee that dc circuit breaker there are enough closing retention forces, and energy consumption can be reduced, avoids closing line
The serious fever of circle, the main circuit of the closing coil further includes the first contactor normally opened contact concatenated with closing coil, described
First contactor normally opened contact both ends are simultaneously connected to divider resistance.
Further, first contactor coil with start switch concatenate after be connected to secondary power supply both ends.
Further, the both ends of the first contactor coil and it is connected to second contactor, the of the second contactor
One normally opened contact is serially connected on the main circuit of closing coil, and one end is connect with the power supply of closing coil main circuit, the other end and
One contactor normally opened contact and divider resistance and contact connect.
Detailed description of the invention
Fig. 1 is the circuit diagram of the control circuit of the utility model dc circuit breaker divide-shut brake.
Specific embodiment
Specific embodiment of the present utility model is described in detail with reference to the accompanying drawing.
The embodiment of the control circuit of the utility model dc circuit breaker divide-shut brake
The control circuit of the utility model dc circuit breaker divide-shut brake includes a second part and two second part, wherein primary portion
Dividing includes closing coil main circuit, and the both ends of closing coil are simultaneously connected to the charging branch contrary with closing coil main circuit current
Road, the charging paths are used in dc circuit breaker separating brake, and are carried out when the main circuit disconnection of closing coil to closing coil reversed
Charging, to eliminate the remanent magnetism of closing coil core material, provides safeguard for quick acting switching-off.
Specifically, as shown in Figure 1, a second part is using the power supply of 220V DC power supply, the closing coil master of a second part
Circuit includes the normally opened touching of the miniature circuit breaker QF1, first contactor KM2 that are serially connected on primary power source (220V direct current) both ends
The first normally opened contact and closing coil of point, second contactor KM1, closing coil both ends are simultaneously connected to and closing coil main circuit electricity
Contrary charging paths are flowed, the normally opened contact of third contactor coil KM3 are serially connected in the charging paths, in direct current interruption
When device executes sub-switching operation, control in the normally opened contact of first contactor KM2 and the first normally opened contact of second contactor KM1
Any contact disconnects, and disconnects the main circuit of closing coil, and the normally opened contact for controlling third contactor is closed, to closing coil into
Row reverse charging.
In order to guarantee that, in dc circuit breaker separating brake, closing coil can thoroughly discharge, closing coil both ends also and are connected to
Discharge paths, the discharge paths include the sub-gate resistance and freewheeling diode of concatenation, which is used for the master of closing coil
Circuit discharges to closing coil after disconnecting, the discharge paths and closing coil and contact pass through third contactor KM3's
Normally-closed contact is connect with primary power source；When the main circuit of closing coil disconnects, closing coil energy by freewheeling diode and
Sub-gate resistance quick release, electric current is reduced to after zero in continuous current circuit, and KM3 coil obtains electric, normally opened contact closure, and normally-closed contact is disconnected
It opens, reverse charging is carried out to closing coil, eliminates the remanent magnetism of core material.
When combined floodgate, DC220V power supply is applied directly on closing coil, is generated enough electromagnetic attractions, is closed breaker rapidly
Lock, and energy is filled for tripping spring, but when closing a floodgate completion, if still DC220V power supply is applied directly on closing coil,
Combined floodgate performance can be influenced, for this purpose, the utility model is in the main electricity of closing coil because closing coil overtension causes fever serious
The first contactor normally opened contact both ends on road simultaneously connect a divider resistance, after the completion of combined floodgate, control first contactor power loss, will
Divider resistance seals in major loop, makes the reduction of closing coil voltage, and provide closing retention force, while reducing energy consumption, avoids closing
Lock electromagnet seriously generates heat.
Two second part of the control circuit using 24V direct current as shown in Figure 1, be powered, first contactor KM2 coil
24V direct current is accessed by starting switch SB1, SB2 after concatenating with the normally-closed contact of first time relay KT1, is started switch
Both ends and the normally opened contact for being connected to second contactor KM1, first time relay KT1 coil, second contactor coil and first
Diode is attempted by the both ends of the normally-closed contact of concatenation first contactor coil KM2 and first time relay KT1；Centre after
Electric appliance KA coil by starting switch SB2 accesses 24V direct current after concatenating with third time relay KT3 normally-closed contact, intermediate
The normally opened contact of relay KA is attempted by the both ends SB2, the line of the coil of third time relay KT3, the second time relay KT2
Circle and the second diode are attempted by KA coil and the KT3 normally-closed contact both ends of concatenation；The coil of third contactor KM3 passes through the
The normally-closed contact of two time relay KT2 is connected on 24V direct current.
The specific control process of foregoing circuit is as follows: when breaker closing, being closed miniature circuit breaker QF1, QF2, closes
Combination switch SB1, first time relay KT1 coil, first contactor KM2 coil and second contactor KM1 coil it is electric, often
Contact KM1 and KM2 closure are opened, DC220V voltage is applied directly to closing coil two sides at this time, and electric current is larger in coil, carries out quick
It closes a floodgate, while filling energy for tripping spring.After breaker closing, which acts, to be completed, KT1 normally-closed contact delay switch is disconnected, KM2
Coil losing electricity, the contact KM2 disconnect, and divider resistance accesses in main circuit, and closing coil voltage reduces, and provide suitably for breaker
Closing retention force, while power consumption is reduced, avoid the overheat of electromagnet.
When sub-switching operation, SB2 button, KM1 coil losing electricity are pressed, the contact KM1 disconnects, the power-off of closing coil major loop；When
Between relay KT2, KT3 coil obtain it is electric；After major loop power-off, closing coil energy is quick by freewheeling diode and sub-gate resistance
It discharges, electric current is reduced to after zero in continuous current circuit, and KT2 normally-closed contact delay switch disconnects, normally opened delay switch closure, KM3 line
Enclose electric, normally opened contact closure, normally-closed contact disconnects, and carries out reverse charging to closing coil, eliminates the remanent magnetism of core material, most
KT3 normally-closed contact delay switch disconnects afterwards, entire down circuitry.
Claims (6)
1. a kind of control circuit of dc circuit breaker divide-shut brake, the main circuit including closing coil, which is characterized in that the combined floodgate
The both ends of coil are simultaneously connected to the charging paths contrary with closing coil main circuit current, which is used for disconnected in direct current
Road device separating brake, and reverse charging is carried out to closing coil when the main circuit disconnection of closing coil.
2. the control circuit of dc circuit breaker divide-shut brake according to claim 1, which is characterized in that the closing coil two
Discharge paths are gone back and are connected at end, which includes the sub-gate resistance and freewheeling diode of concatenation, and the discharge paths are for closing
The main circuit of brake cable circle discharges to closing coil after disconnecting.
3. the control circuit of dc circuit breaker divide-shut brake according to claim 2, which is characterized in that the discharge paths
On be serially connected with the normally-closed contact of the time relay.
4. the control circuit of dc circuit breaker divide-shut brake according to claim 1 or 3, which is characterized in that the closing line
The main circuit of circle further includes the first contactor normally opened contact concatenated with closing coil, first contactor normally opened contact both ends
And it is connected to divider resistance.
5. the control circuit of dc circuit breaker divide-shut brake according to claim 4, which is characterized in that first contactor coil
With start switch concatenate after be connected to secondary power supply both ends.
6. the control circuit of dc circuit breaker divide-shut brake according to claim 5, which is characterized in that the first contactor
The both ends of coil are simultaneously connected to second contactor, and the first normally opened contact of the second contactor is serially connected in the main circuit of closing coil
On, one end is connect with the power supply of closing coil main circuit, the other end and first contactor normally opened contact and divider resistance and connect
Point connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820992067.1U CN208352237U (en) | 2018-06-26 | 2018-06-26 | A kind of control circuit of dc circuit breaker divide-shut brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820992067.1U CN208352237U (en) | 2018-06-26 | 2018-06-26 | A kind of control circuit of dc circuit breaker divide-shut brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208352237U true CN208352237U (en) | 2019-01-08 |
Family
ID=64881008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820992067.1U Active CN208352237U (en) | 2018-06-26 | 2018-06-26 | A kind of control circuit of dc circuit breaker divide-shut brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208352237U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108630505A (en) * | 2018-06-26 | 2018-10-09 | 河南森源电气股份有限公司 | A kind of control method and circuit of dc circuit breaker divide-shut brake |
-
2018
- 2018-06-26 CN CN201820992067.1U patent/CN208352237U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108630505A (en) * | 2018-06-26 | 2018-10-09 | 河南森源电气股份有限公司 | A kind of control method and circuit of dc circuit breaker divide-shut brake |
| CN108630505B (en) * | 2018-06-26 | 2024-03-26 | 河南森源电气股份有限公司 | Control circuit for switching on and off of direct current breaker |
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