CN214314569U - High-voltage circuit breaker control device - Google Patents
High-voltage circuit breaker control device Download PDFInfo
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- CN214314569U CN214314569U CN202022423928.4U CN202022423928U CN214314569U CN 214314569 U CN214314569 U CN 214314569U CN 202022423928 U CN202022423928 U CN 202022423928U CN 214314569 U CN214314569 U CN 214314569U
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- circuit breaker
- open contact
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Abstract
The application provides a high-voltage circuit breaker control device, belongs to high-voltage circuit breaker technical field. The device that this application embodiment provided, through setting up at least one undervoltage relay, this undervoltage relay passes through the voltage in the voltage transformer control power supply system bus, when power supply system bus voltage reduces, the voltage at undervoltage relay's solenoid both ends also reduces thereupon, after the voltage at undervoltage relay's solenoid both ends drops to being less than preset voltage, the disconnection of first normally open contact, thereby make the device be in the off-circuit state, even the combined floodgate button is pressed, the combined floodgate coil also can not be electrified, high voltage circuit breaker also can not close a floodgate, thereby the back of closing a floodgate has been avoided, the danger of equipment such as motors can direct start when high voltage power supply system resumes. After the bus voltage of the power supply system is restored to the working state, the first normally open contact of the under-voltage relay is closed, the closing button is pressed at the moment, the closing coil is electrified, and the high-voltage circuit breaker operates normally after closing.
Description
Technical Field
The application relates to the technical field of high-voltage circuit breakers, in particular to a voltage loss control device of a high-voltage circuit breaker.
Background
The high-voltage circuit breaker is a device for controlling the start and stop of high-voltage electric equipment, plays the role of isolating a high-voltage power supply and switching on and off normal load current, and the high-voltage circuit breaker commonly used at present is powered by a station direct-current screen for a controller of the high-voltage circuit breaker when a high-voltage power supply system works normally, and is automatically switched to a controller powered by a storage battery for the high-voltage circuit breaker after the high-voltage power supply system loses voltage, and the power supply voltage is kept unchanged. After the high-voltage power supply system loses voltage, a controller of the high-voltage circuit breaker can trigger a voltage loss protection action to enable the high-voltage circuit breaker to trip. Under normal conditions, after the voltage of the high-voltage power supply system is recovered, the starting button of the electric equipment is operated again to restart the equipment. However, if an operator presses the start button before the voltage of the high-voltage power supply system is recovered, the high-voltage circuit breaker is switched on in a voltage loss state. Under the condition, once the voltage of the high-voltage power supply system is recovered, the equipment such as a motor in a high-voltage circuit and the like is directly started to impact a power grid and cause production accidents and personal safety accidents.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a high-voltage circuit breaker controlling means, can realize: even if a switching-on button is pressed, the switching-on coil cannot be electrified, and the high-voltage circuit breaker cannot be switched on, so that the danger that equipment such as a motor and the like can be directly started when a high-voltage power supply system recovers after the switching-on is avoided. The technical scheme is as follows:
there is provided a high voltage circuit breaker control apparatus, the apparatus comprising: the direct current circuit breaker comprises a direct current input terminal, a closing button, at least one under-voltage relay, a breaker, a closing coil and a direct current output terminal which are electrically connected in sequence;
the direct current input terminal and the direct current output terminal are used for providing direct current;
the closing button is a inching switch;
the undervoltage relay includes: the two ends of the electromagnetic coil are respectively connected to any phase line and zero line in a secondary voltage bus of the voltage transformer, the first normally open contact is connected between the closing button and the circuit breaker in series, and after the voltage at the two ends of the electromagnetic coil is lower than a preset voltage, the first normally open contact is disconnected, so that the closing coil cannot be electrified, and the high-voltage circuit breaker cannot be closed.
In one possible design, the number of under-voltage relays is 3;
each under-voltage relay is connected with a different phase line.
In one possible design, the under-voltage relay includes: two electromagnetic coils and two first normally open contacts;
two electromagnetic coils are connected in series, and two first normally open contacts are connected in series.
In one possible design, the predetermined voltage is 85% of the normal operating voltage.
In one possible design, the predetermined voltage is 49V.
In one possible design, the first normally open contact opens after a predetermined time delay after the voltage across the solenoid coil is below a predetermined voltage.
In one possible design, the apparatus further includes: and the air switch comprises at least one second normally open contact which is connected between the voltage transformer and the electromagnetic coil of the under-voltage relay in series.
In one possible design, the number of the second normally open contacts is 3.
In one possible design, the air switch further comprises a third normally open contact connected in parallel across the first normally open contact (32) of the undervoltage relay (3).
In one possible design, the apparatus further includes: a first fuse and a second fuse;
the first fuse is connected in series between the direct current input terminal and the closing button;
the second fuse is connected in series between the closing coil and the dc output terminal.
The device that this application embodiment provided, through setting up at least one undervoltage relay, this undervoltage relay passes through the voltage in the voltage transformer control power supply system bus, when power supply system bus voltage reduces, the voltage at undervoltage relay's solenoid both ends also reduces thereupon, after the voltage at undervoltage relay's solenoid both ends drops to being less than preset voltage, the disconnection of first normally open contact, thereby make the device be in the off-circuit state, even the combined floodgate button is pressed, the combined floodgate coil also can not be electrified, high voltage circuit breaker also can not close a floodgate, thereby the back of closing a floodgate has been avoided, the danger of equipment such as motors can direct start when high voltage power supply system resumes. After the bus voltage of the power supply system is restored to the working state, the first normally open contact of the under-voltage relay is closed, the closing button is pressed at the moment, the closing coil is electrified, and the high-voltage circuit breaker operates normally after closing.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a high-voltage circuit breaker control device according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of another high-voltage circuit breaker control device provided in an embodiment of the present application.
The reference numerals for the various parts in the drawings are illustrated below:
1-a direct current input terminal;
2-a closing button;
3-under voltage relay;
31-an electromagnetic coil;
32-a first normally open contact;
4-a circuit breaker;
5-closing coil;
6-direct current output terminal;
7-an air switch;
71-a second normally open contact;
72-a third normally open contact;
8-a first fuse;
9-second fuse.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
Fig. 1 is a schematic structural diagram of a control device for a high-voltage circuit breaker according to an embodiment of the present application, please refer to fig. 1, where the device includes: the circuit breaker comprises a direct current input terminal 1, a closing button 2, at least one under-voltage relay 3, a breaker 4, a closing coil 5 and a direct current output terminal 6 which are electrically connected in sequence; the direct current input terminal 1 and the direct current output terminal 6 are used for supplying direct current; the closing button 2 is a inching switch; the undervoltage relay 3 includes: at least one solenoid 31 and at least one first normally open contact 32, this solenoid 31's both ends are connected respectively on arbitrary phase line and zero line in voltage transformer's the secondary voltage generating line, and this first normally open contact 32 establishes ties between this close button 2 and this circuit breaker 4, and after the voltage at this solenoid 31 both ends is less than preset voltage, this first normally open contact 32 disconnection to make this close coil 5 can not be electrified, high voltage circuit breaker can not close a floodgate.
The working principle of the device is described in detail below:
the direct current in the device has two power supplies, when a high-voltage power supply system works normally, the station direct current screen supplies power for the control device of the high-voltage circuit breaker, after the high-voltage power supply system loses voltage, the direct current is automatically switched to the storage battery to supply power for the control device of the high-voltage circuit breaker, and the power supply voltage is kept unchanged. The voltage transformer can be installed in a high-voltage cabinet, a secondary voltage bus is output from the voltage transformer, and the electromagnetic coil 31 is connected between the secondary voltage bus and a zero line in parallel, so that the voltage of a high-voltage power supply system is monitored through the voltage transformer.
Under-voltage relay 3's solenoid 31 and high voltage power supply system secondary voltage bus and zero line are parallelly connected between, auxiliary contact connects in controlling means, the first normally open contact 32 closure of high voltage power supply system circuit normal during operation, and after voltage is less than preset voltage, because the electromagnetic force that electromagnetic system produced can reduce, under reset spring's effect, first normally open contact 32 disconnection, thereby make above-mentioned controlling means's circuit outage, and then control high voltage power supply system circuit outage, protect among the high voltage power supply system with electrical apparatus not damaged under the low-pressure.
The device that this application embodiment provided, through setting up at least one undervoltage relay 3, this undervoltage relay 3 passes through the voltage in the voltage transformer control power supply system bus, when power supply system bus voltage reduces, the voltage at undervoltage relay 3's solenoid 31 both ends also reduces thereupon, the voltage at undervoltage relay 3's solenoid 31 both ends drops to being less than after predetermineeing the voltage, first normally open contact 32 disconnection, thereby make the device be in the state of breaking circuit, even closing button 2 is pressed, closing coil 5 also can not be electrified, high voltage circuit breaker also can not close a floodgate, thereby the back of having avoided closing a floodgate, the danger of equipment such as motors can direct start when high voltage power supply system resumes. After the bus voltage of the power supply system is restored to the working state, the first normally open contact 32 of the undervoltage relay 3 is closed, the closing button 2 is pressed at the moment, the closing coil 5 is electrified, and the high-voltage circuit breaker is closed and normally operates.
Through the device, the high-voltage circuit breaker control circuit has a voltage loss protection function, and under the condition that the high-voltage power supply system loses voltage, the situation that the closing coil 5 in the high-voltage circuit breaker control circuit is powered on due to the connection of the starting button of the electric equipment is prevented, and the high-voltage circuit breaker is prevented from being closed when the voltage of the high-voltage power supply system is recovered. And the control power supply insurance does not need to be disconnected during the on-duty work of the power station, so that the operation steps and the operation time of an operator are simplified, and the electric shock risk caused by the operation insurance is reduced, and meanwhile, the impact and the production or safety accident to the power grid caused by the direct starting of high-voltage equipment when the high-voltage power supply system is recovered are avoided.
The following details the structure and the working principle of each part of the device:
in one possible design, the number of under-voltage relays 3 is 3; each under-voltage relay (3) is connected with different phase lines, and after the voltage of any phase line is lower than the preset voltage, the under-voltage relays (3) can act, and the state of the first normally open contact (32) is changed through the electromagnetic coil (31); conversely, the first normally open contacts 32 of all relays need to be closed to cause the under-voltage relay 3 in the control circuit to be connected, thereby improving the safety of the device.
In one possible design, the undervoltage relay 3 comprises: two electromagnetic coils 31 and two first normally open contacts 32; two electromagnetic coils 31 are connected in series, two first normally open contacts 32 are connected in series, each electromagnetic coil 31 controls one first normally open contact 32, and when any electromagnetic coil 31 controls the corresponding first normally open contact 32 to be disconnected, the circuit of the control device can be disconnected; conversely, all the solenoid coils 31 are required to control the closing of the corresponding first normally open contacts 32 to cause the connection of the undervoltage relay 3 in the control circuit, thereby improving the safety of the device.
In a possible design, the preset voltage is 85% of the normal working voltage, so that the efficiency of the device for identifying circuit faults in a high-voltage power supply system can be improved, and dangers are avoided.
For example, if the rated voltage of the high-voltage power supply system is 6kV, the voltage ratio of the voltage transformer is 6: 0.1, the secondary voltage is 100V, and since the circuit is a three-phase circuit, the rated voltage in each phase circuit is
I.e. the normal voltage is about 57.7V, 85% of 57.7V is about 49V. Thus, in one possible design, the predetermined voltage is 49V.
In one possible design, the first normally open contact 32 opens after a predetermined time delay after the voltage across the solenoid coil 31 is below a predetermined voltage.
Through setting up the time delay function, improve this undervoltage relay 3's reliability, further, this undervoltage relay 3 can also have warning and trip indicating function, can be after the predetermined length of time disconnection after the warning to can indicate operating personnel, so as to prepare for the trip.
In one possible design, the apparatus further includes: an air switch 7, the air switch 7 comprising at least one second normally open contact 71, connected in series between the voltage transformer and the electromagnetic coil 31 of the under voltage relay 3. The air switch 7 is used to control whether the under-voltage relay 3 is in use,
in one possible design, the number of the second normally open contacts 71 is 3, and the second normally open contacts correspond to three phase lines of the secondary voltage bus respectively.
Fig. 2 is a schematic structural diagram of another high-voltage circuit breaker control device provided in the embodiment of the present application, please refer to fig. 2, in a possible design, the air switch 7 further includes a third normally open contact 72 connected in parallel across the first normally open contact 32 of the undervoltage relay 3.
Based on the setting of above-mentioned undervoltage relay 3, when high voltage power supply system low pressure was to high-pressure conversion, only when the three-phase voltage of secondary voltage all recovered, and during the action of all solenoid 31 in the undervoltage relay 3 all controlled corresponding first normally open contact 32, the undervoltage relay 3 among this controlling means just communicates, if break down in the above-mentioned structure, then can be through the third normally open contact 72 of closed air switch 7, directly put through the both ends of low voltage relay 32, play standby function, even when having guaranteed the undervoltage relay 3 trouble, the device still can guarantee high voltage power supply system's work.
In one possible design, the apparatus further includes: a first fuse 8 and a second fuse 9; the first fuse 8 is connected in series between the dc input terminal 1 and the closing button 2; the second fuse 9 is connected in series between the closing coil 5 and the dc output terminal 6, and is used to protect the circuit in the control device.
All the above optional technical solutions may be combined arbitrarily to form optional embodiments of the present application, and are not described herein again.
The device that this application embodiment provided, through setting up at least one undervoltage relay 3, this undervoltage relay 3 passes through the voltage in the voltage transformer control power supply system bus, when power supply system bus voltage reduces, the voltage at undervoltage relay 3's solenoid 31 both ends also reduces thereupon, the voltage at undervoltage relay 3's solenoid 31 both ends drops to being less than after predetermineeing the voltage, first normally open contact 32 disconnection, thereby make the device be in the state of breaking circuit, even closing button 2 is pressed, closing coil 5 also can not be electrified, high voltage circuit breaker also can not close a floodgate, thereby the back of having avoided closing a floodgate, the danger of equipment such as motors can direct start when high voltage power supply system resumes. After the bus voltage of the power supply system is restored to the working state, the first normally open contact 32 of the undervoltage relay 3 is closed, the closing button 2 is pressed at the moment, the closing coil 5 is electrified, and the high-voltage circuit breaker operates normally after closing.
Further, in a possible design, the air switch 7 further includes a third normally open contact 72 connected in parallel to both ends of the first normally open contact 32 of the under-voltage relay 3, so as to play a standby function, thereby ensuring that the device can still ensure the operation of the high-voltage power supply system even if the under-voltage relay 3 fails.
The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (7)
1. A high voltage circuit breaker control apparatus, characterized in that the apparatus comprises: the circuit breaker comprises a direct current input terminal (1), a closing button (2), at least one under-voltage relay (3), a breaker (4), a closing coil (5) and a direct current output terminal (6) which are electrically connected in sequence;
the direct current input terminal (1) and the direct current output terminal (6) are used for providing direct current;
the closing button (2) is a inching switch;
the undervoltage relay (3) comprises: at least one solenoid (31) and at least one first normally open contact (32), the both ends of solenoid (31) are connected respectively on arbitrary phase line and zero line in voltage transformer's the secondary voltage generating line, first normally open contact (32) are established ties closing button (2) with between circuit breaker (4) after the voltage at solenoid (31) both ends is less than preset voltage, first normally open contact (32) disconnection, so that closing coil (5) can not be electrified, and high voltage circuit breaker can not close a floodgate.
2. The device according to claim 1, characterized in that the number of undervoltage relays (3) is 3;
and each under-voltage relay (3) is connected with different phase lines.
3. The arrangement according to claim 1, characterized in that the undervoltage relay (3) comprises: two electromagnetic coils (31) and two first normally open contacts (32);
the two electromagnetic coils (31) are connected in series, and the two first normally open contacts (32) are connected in series.
4. The apparatus of claim 1, further comprising: an air switch (7), said air switch (7) comprising at least one second normally open contact (71) connected in series between said voltage transformer and the electromagnetic coil (31) of said under voltage relay (3).
5. The device according to claim 4, wherein the number of the second normally open contacts (71) is 3.
6. The device according to claim 4, characterized in that the air switch (7) further comprises a third normally open contact (72) connected in parallel across the first normally open contact (32) of the undervoltage relay (3).
7. The apparatus of claim 1, further comprising: a first fuse (8) and a second fuse (9);
the first fuse (8) is connected in series between the direct current input terminal (1) and the closing button (2);
the second fuse (9) is connected in series between the closing coil (5) and the DC output terminal (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022423928.4U CN214314569U (en) | 2020-10-27 | 2020-10-27 | High-voltage circuit breaker control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022423928.4U CN214314569U (en) | 2020-10-27 | 2020-10-27 | High-voltage circuit breaker control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214314569U true CN214314569U (en) | 2021-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022423928.4U Active CN214314569U (en) | 2020-10-27 | 2020-10-27 | High-voltage circuit breaker control device |
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|---|---|
| CN (1) | CN214314569U (en) |
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- 2020-10-27 CN CN202022423928.4U patent/CN214314569U/en active Active
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