CN216625276U - High-voltage circuit breaker divide-shut brake coil protection device - Google Patents
High-voltage circuit breaker divide-shut brake coil protection device Download PDFInfo
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- CN216625276U CN216625276U CN202122990003.2U CN202122990003U CN216625276U CN 216625276 U CN216625276 U CN 216625276U CN 202122990003 U CN202122990003 U CN 202122990003U CN 216625276 U CN216625276 U CN 216625276U
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Abstract
The utility model discloses a high-voltage circuit breaker opening and closing coil protection device, and relates to the field of high-voltage circuit breakers. At present, partial breaker opening and closing coil protection devices are arranged on the market and are connected in series in a secondary circuit, and if the protection devices break down, the circuit breakers can be abnormally stopped. The high-precision clamp type direct current measurement device comprises a high-precision clamp type direct current measurement unit, a data acquisition and processing unit, a power supply module, an output protection node and an output alarm node, wherein the clamp type direct current measurement unit is sleeved on a control loop to realize non-contact induction measurement, the clamp type direct current measurement unit is connected with the data acquisition and processing unit, the output protection node is connected in series on the control loop, and the data acquisition and processing unit is connected with the output protection node and the output alarm node. Through non-contact measurement, when the protection device breaks down, a circuit breaker control circuit is still complete, and the abnormal shutdown condition of the circuit breaker caused by the failure of the circuit breaker can be effectively solved.
Description
Technical Field
The utility model relates to the field of high-voltage circuit breakers, in particular to a protective device for a switching-on and switching-off coil of a high-voltage circuit breaker.
Background
The high-voltage circuit breaker is switched on and off mainly by means of the fact that an iron core is driven to trip by the excitation of a switching-on and switching-off coil, and the energy of a release mechanism is achieved.
In reality, the opening and closing of the circuit breaker are often burnt due to failure or auxiliary contact faults, and the opening and closing coils are designed according to short-time power-on. The resistance of the general opening and closing coil is dozens to hundreds of ohms, the wire diameter of the coil is more than the number of turns, and the electrification time of the coil does not exceed 5s under normal conditions. When the current in the secondary circuit can not be normally cut off, the coil generates a large amount of heat after being electrified for a long time, so that the coil is burnt.
The indirect reason for the electromagnet burnout is that the breaker refuses to operate, which mainly comprises: the electromagnet has self fault, improper mechanism stroke adjustment, abnormal mechanism locking function, incomplete auxiliary circuit breaker switching, opening and closing under the condition of no energy storage, low opening and closing loop voltage and the like. The direct reason is that the coil passes large current for a long time, so that the coil is overheated and burnt.
At present, partial breaker opening and closing coil protection devices are arranged on the market and are connected in series in a secondary circuit, and if the protection devices break down, the circuit breakers can be abnormally stopped.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved and the technical task to be solved by the utility model are to perfect and improve the prior technical scheme, and provide a high-voltage circuit breaker opening and closing coil protection device, aiming at improving the protection capability of the circuit breaker opening and closing coil. Therefore, the utility model adopts the following technical scheme.
The utility model provides a high voltage circuit breaker divide-shut brake coil protection device, includes high accuracy tong-type direct current measuring unit, data acquisition processing unit, power module, output protection node and output warning node, tong-type direct current measuring unit cup joint on control circuit in order to realize contactless induction measurement, tong-type direct current measuring unit be connected in order to provide measured data with data acquisition processing unit, output protection node be the normal close formula, concatenate on control circuit, data acquisition processing unit be connected with output protection node and realize the disconnection and the closed operation of output protection node with output control signal, data acquisition processing unit and output warning node be connected in order to output warning signal, power module be connected in order to provide the power with data acquisition processing unit.
The device is only connected in series with the output protection node in the control circuit of the circuit breaker, and the measuring unit is not directly connected in series in the secondary circuit through the non-contact measuring mode of the high-precision clamp type direct current measuring unit.
As a preferable technical means: the power supply module is provided with a direct current or 220v alternating current input interface. The direct current or alternating current input can be connected according to actual needs, 220v alternating current is relatively easy to obtain, the manufacturing cost is low, the direct current power supply can be applied to a particularly important circuit breaker, and the power supply module converts input voltage into working voltage required by the data acquisition and processing unit.
As a preferable technical means: the output alarm node is connected to a remote monitoring system. The remote monitoring is convenient, and when the protection device is in failure or loses power, the remote alarm is realized.
As a preferable technical means: the output alarm node is normally open. When the protection device fails or loses power, the alarm is closed.
As a preferable technical means: the data acquisition and processing unit is provided with a time delay automatic reset module. The purpose of the time delay is to ensure that no current returns to the closing holding relay or the opening holding relay, and the automatic reset is to ensure the possibility of the circuit breaker operating again.
As a preferable technical means: the data acquisition and processing unit is connected with a manual reset button. Manual reset may be used in situations where automatic reset is ineffective due to charge blockage in the microcircuit or integrated circuit portion of the device.
Has the advantages that: the device is only connected in series with the output protection node in the control circuit of the circuit breaker, and the measuring unit is not directly connected in series in the secondary circuit through the non-contact measuring mode of the high-precision clamp type direct current measuring unit.
Drawings
Fig. 1 is a schematic diagram of the structural principle of the present invention.
Fig. 2 is a schematic diagram of the connection of the present invention in a circuit breaker control loop.
In the figure: 1. a clamp type direct current measurement unit; 2. a data acquisition processing unit; 3. a power supply module; 4. an output protection node; 5. and outputting the alarm node.
Detailed Description
The technical scheme of the utility model is further explained in detail by combining the drawings in the specification.
As shown in fig. 1, a high-voltage circuit breaker switching-on/off coil protection device, including high accuracy clamp type direct current measuring unit 1, data acquisition processing unit 2, power module 3, output protection node 4 and output warning node 5, clamp type direct current measuring unit 1 cup joints on the control loop in order to realize contactless induction measurement, clamp type direct current measuring unit 1 is connected with data acquisition processing unit 2 in order to provide measured data, output protection node 4 is the normal close formula, connect in series on the control loop, data acquisition processing unit 2 is connected with output protection node 4 and realizes the disconnection and the closed operation of output protection node 4 with output control signal, data acquisition processing unit 2 is connected with output warning node 5 in order to output warning signal, power module 3 is connected with data acquisition processing unit 2 in order to provide the power.
In order to obtain power relatively easily, the power module 3 is provided with a 220v ac input interface. Direct current or alternating current input can be connected according to actual needs, 220v alternating current is relatively easy to obtain, the manufacturing cost is low, and the power module 3 converts input voltage into working voltage required by the data acquisition and processing unit 2. In addition, unlike the present example, in a circuit breaker of particular importance, the power supply module 3 may also employ a direct-current power supply input module instead of an alternating-current power supply input module.
To implement remote alarm, the output alarm node 5 is connected to a remote monitoring system. The remote monitoring and watching are convenient, and when the protection device is in failure or loses power, the remote alarm is realized.
In this example, the output alarm node 5 is normally open. When the protection device fails or loses power, the alarm is closed.
In order to ensure the possibility of the circuit breaker operating again, the data acquisition and processing unit 2 is provided with a time delay automatic reset module. The purpose of the time delay is to ensure that no current returns to the closing holding relay or the opening holding relay, and the automatic reset is to ensure the possibility of the circuit breaker operating again.
In order to realize manual reset, the data acquisition and processing unit 2 is connected with a manual reset button. Manual reset may be used in situations where automatic reset is ineffective due to charge blockage in the microcircuit or integrated circuit portion of the device.
As shown in fig. 2, the circuit breaker control loop is shown, TQ is an opening coil, HC is a closing coil, DL is a circuit breaker auxiliary node, JDT and JDH respectively indicate on-site opening and closing, YTJ is remote tripping including remote opening and protection tripping, YHJ is remote closing including remote closing and protection reclosing, TBJ is a trip holding relay, and HBJ is a closing holding relay.
And connecting the protection device into a switching-on and switching-off control loop of the circuit breaker.
When the breaker normally operates, only a small current flows through an opening or closing loop, and the protection device cannot act. When the breaker operates or acts, the operating current is larger than the starting current value of the device, if the current duration is 2 seconds and is larger than the 500 millisecond set value of the protection device, the breaker is judged to be refused to act, the protection device acts instantly, a control loop is cut off, and the opening or closing coil of the breaker is protected.
When the circuit breaker works, the clamp type direct current measuring unit 1 is responsible for collecting the current of an opening and closing control loop of the circuit breaker, and transmitting the current to the data collecting and processing unit 2 for judgment and selection.
The data acquisition processing unit 2 comprehensively judges the acquired data and makes an action or non-action according to a preset logic.
When the data acquisition and processing unit 2 judges that the circuit breaker refuses to operate, the circuit breaker immediately operates, and the output protection node 4 is disconnected, so that a circuit breaker control loop is disconnected, the switching-on and switching-off coils are protected, and the circuit breaker is prevented from being damaged due to overheating. In order to prevent the protection device from repeatedly acting because the fault is not isolated, the protection node returns according to the set time delay.
When the protection device has a fault or the power supply loses power, the output alarm node 5 is closed, and the data acquisition and processing unit 2 is triggered to output an alarm signal to a remote computer monitoring system, so that remote monitoring of the unattended station is realized.
This device only exports protection node 4 and concatenates in the control circuit of circuit breaker, through 1 non-contact measurement mode of high accuracy tong-type direct current measuring unit, the measuring unit is not directly concatenated in the secondary circuit, when protection device trouble, circuit breaker control circuit is still complete, does not influence the operation of circuit breaker itself, can effectively solve the circuit breaker and refuse the abnormal shutdown of the circuit breaker that causes and divide even, the condition of closing coil burnout takes place, effectively promote the protective capacities to circuit breaker divide-shut brake coil.
The opening and closing coil protection device for the high-voltage circuit breaker shown in fig. 1-2 is a specific embodiment of the present invention, and already embodies the substantial features and the progress of the present invention, and the same modifications in shape, structure and the like can be made according to the practical use requirements, and are within the protection scope of the present scheme.
Claims (6)
1. The utility model provides a high voltage circuit breaker divide-shut brake coil protection device which characterized in that: comprises a high-precision clamp type direct current measuring unit (1), a data acquisition processing unit (2), a power supply module (3), an output protection node (4) and an output alarm node (5), the clamp type direct current measuring unit (1) is sleeved on a control loop to realize non-contact induction measurement, the clamp type direct current measuring unit (1) is connected with the data acquisition and processing unit (2) to provide measuring data, the output protection node (4) is normally closed and is connected in series with the control loop, the data acquisition and processing unit (2) is connected with the output protection node (4) to output a control signal to realize the opening and closing operation of the output protection node (4), the data acquisition processing unit (2) is connected with the output alarm node (5) to output alarm signals, the power module (3) is connected with the data acquisition and processing unit (2) to provide power.
2. The opening and closing coil protection device for the high-voltage circuit breaker according to claim 1, characterized in that: the power supply module (3) is provided with a direct current or 220v alternating current input interface.
3. The opening and closing coil protection device for the high-voltage circuit breaker according to claim 2, characterized in that: the output alarm node (5) is connected to a remote monitoring system.
4. The opening and closing coil protection device for the high-voltage circuit breaker according to claim 3, characterized in that: the output alarm node (5) is normally open.
5. The opening and closing coil protection device for the high-voltage circuit breaker according to claim 1, characterized in that: the data acquisition and processing unit (2) is provided with a time delay automatic reset module.
6. The opening and closing coil protection device for the high-voltage circuit breaker according to claim 5, wherein: the data acquisition and processing unit (2) is connected with a manual reset button.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122990003.2U CN216625276U (en) | 2021-12-01 | 2021-12-01 | High-voltage circuit breaker divide-shut brake coil protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122990003.2U CN216625276U (en) | 2021-12-01 | 2021-12-01 | High-voltage circuit breaker divide-shut brake coil protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216625276U true CN216625276U (en) | 2022-05-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122990003.2U Active CN216625276U (en) | 2021-12-01 | 2021-12-01 | High-voltage circuit breaker divide-shut brake coil protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216625276U (en) |
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2021
- 2021-12-01 CN CN202122990003.2U patent/CN216625276U/en active Active
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