CN108054058A - The control observation circuit of breaker spring energy storage - Google Patents
The control observation circuit of breaker spring energy storage Download PDFInfo
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- CN108054058A CN108054058A CN201810024737.5A CN201810024737A CN108054058A CN 108054058 A CN108054058 A CN 108054058A CN 201810024737 A CN201810024737 A CN 201810024737A CN 108054058 A CN108054058 A CN 108054058A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/04—Means for indicating condition of the switching device
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/04—Means for indicating condition of the switching device
- H01H2071/044—Monitoring, detection or measuring systems to establish the end of life of the switching device, can also contain other on-line monitoring systems, e.g. for detecting mechanical failures
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The present invention provides a kind of control observation circuits of breaker spring energy storage.The circuit includes DC control supply, the combined floodgate circuit for connecting DC control supply and the non-energy storage on-off model circuit with combined floodgate circuit in parallel, further includes energy storage state indicating circuit.Wherein, non-energy storage on-off model circuit includes the normally closed switch in energy storage switching group, before switching-in spring stores up full energy, the non-always on instruction non-energy storage of switching-in spring in energy storage on-off model circuit.Energy storage state indicating circuit includes the normal open switch in energy storage switching group.The operating mechanism of switching-in spring includes switch shifting mechanism, switching-in spring is stirred in energy storage switching group by switch shifting mechanism when storing up full energy and respectively switched, make each switch change state, so as to connect the full energy of energy storage state indicating circuit instruction switching-in spring storage, simultaneously switch off non-energy storage on-off model circuit.The present invention can realize the monitoring, alarming of spring energy-storage loop fault and the quick lookup of tank circuit failure, improve trouble shoot efficiency.
Description
Technical Field
The invention relates to the technical field of an electrical control loop of a spring energy storage mechanism of a circuit breaker, in particular to a circuit for controlling and monitoring the energy storage of a spring of the circuit breaker.
Background
High-voltage circuit breakers, which are used to switch on or off normal operating currents or short-circuit fault currents in high-voltage circuits, have a very important role in electrical power systems. At present, many circuit breakers adopt a spring energy storage operating mechanism, and the spring energy storage operating mechanism mainly plays a role in stretching a closing or opening spring to enable the closing or opening spring to have corresponding potential energy. When switching on or switching off, the switching on or switching off electromagnet acts, and the switching on or switching off spring quickly switches on or switches off the moving contact of the circuit breaker, and the main purpose of the circuit breaker is to reduce the existing time of the electric arc of the switching on or switching off and achieve the purpose of quickly extinguishing the arc. The spring energy storage operating mechanism is manually or electrically operated.
However, in practical application, the spring energy storage microswitch and the electric loop thereof have multiple branches, faults occur frequently, each electric branch of the spring energy storage microswitch is not familiar with, and the energy storage signal indication monitoring function is insufficient, so that the judgment is wrong, the troubleshooting time is prolonged, the troubleshooting efficiency is low, and the normal switching-on operation and power supply of the circuit breaker are influenced.
Therefore, a control and monitoring circuit for energy storage of a spring of a circuit breaker is urgently needed, background monitoring alarm display of faults of the spring energy storage loop can be achieved, and the fault finding efficiency of the spring energy storage loop can be improved.
Disclosure of Invention
The invention aims to provide a circuit for controlling and monitoring energy storage of a breaker spring, which is used for automatically monitoring the energy storage fault of a closing spring of the breaker.
In order to solve the technical problems, the invention discloses the following technical scheme:
a control and monitoring circuit for energy storage of a spring of a circuit breaker is provided. The control and monitoring circuit for the energy storage of the spring of the circuit breaker comprises a direct-current control power supply, a switching-on circuit which is connected with the direct-current control power supply and is used for switching on the circuit breaker, a non-energy-storage switching value signal loop which is connected with the switching-on circuit in parallel, and an energy storage state indicating circuit. Wherein,
the non-energy-storage switching value signal loop comprises a normally closed switch in an energy storage switch group, and before the closing spring is fully charged, the non-energy-storage switching value signal loop is in a connected state to indicate that the closing spring is not charged;
the energy storage state indicating circuit comprises a normally open switch in an energy storage switch group;
the operating mechanism of the closing spring comprises a switch toggle mechanism, when the closing spring is fully charged, each switch in the energy storage switch group is toggled through the switch toggle mechanism so that each switch can change the state, the energy storage state indicating circuit is switched on to indicate that the closing spring is fully charged, and the non-charged switching value signal loop is switched off at the same time.
To the control monitoring circuit of above-mentioned circuit breaker spring energy storage, closing circuit includes the supplementary normally closed contact of normally open switch, circuit breaker and closing coil among the device among closing control switch, the microcomputer protection measurement and control device, the energy storage switch group, wherein, device among the microcomputer protection measurement and control device includes closing relay coil, normally open switch is first normally open switch.
The circuit for controlling and monitoring the energy storage of the spring of the circuit breaker further comprises a direct-current switching-on power supply and an energy storage loop which is connected with the direct-current switching-on power supply and is used for storing the energy of the switching-on spring.
To above-mentioned circuit breaker spring energy storage control monitoring circuit, energy storage circuit includes energy storage change over switch, the normally closed switch in the energy storage switch group and energy storage motor, wherein, normally closed switch is first normally closed switch.
For the control and monitoring circuit for energy storage of the spring of the circuit breaker, the energy storage state indicating circuit comprises an energy storage position indicating circuit connected with the energy storage loop in parallel.
To above-mentioned circuit breaker spring energy storage control monitoring circuit, energy storage position indicating circuit include energy storage position pilot lamp with normally open switch among the energy storage switch group, wherein, normally open switch is the second normally open switch.
For the control and monitoring circuit for energy storage of the spring of the circuit breaker, the energy storage state indicating circuit comprises an energy storage state display circuit connected with the closing circuit in parallel.
To the control monitoring circuit of above-mentioned circuit breaker spring energy storage, energy storage state display circuit include the on-off state indicator with normally open switch among the energy storage switch group, wherein, normally open switch is the third normally open switch.
For the control monitoring circuit for energy storage of the breaker spring, the switch state indicator comprises a digital display tube.
To above-mentioned circuit breaker spring energy storage control monitoring circuit, not the normally closed switch in device and the energy storage switch group among the microcomputer protection measurement and control device in the energy storage switching value signal return circuit, wherein, device among the microcomputer protection measurement and control device includes pilot lamp and communication interface, normally closed switch is second normally closed switch.
The circuit for controlling and monitoring the energy storage of the spring of the circuit breaker has the following main advantages:
the problems that the spring energy storage microswitch and an electric loop of the spring energy storage microswitch have multiple branches, frequent faults and insufficient energy storage signal indication monitoring function, so that judgment errors are caused, fault troubleshooting time is prolonged, fault troubleshooting efficiency is low, normal switching-on operation and power supply of a circuit breaker are influenced can be solved, monitoring alarm of faults of the spring energy storage loop and quick searching of faults of the energy storage loop can be realized, background monitoring alarm of faults of the spring energy storage loop can also be realized, and therefore fault searching efficiency of the energy storage loop is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention by way of example only and are not to be construed as limiting the embodiments of the invention in any way. In the drawings:
fig. 1 is a schematic structural diagram of a circuit for controlling and monitoring energy storage of a spring of a circuit breaker according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms first, second and the like in the description and in the claims, and in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be practiced otherwise than as specifically illustrated.
Fig. 1 is a schematic structural diagram of a circuit for controlling and monitoring energy storage of a spring of a circuit breaker according to an embodiment of the present invention. As shown in fig. 1, the circuit for controlling and monitoring energy storage of a spring of a circuit breaker provided in this embodiment includes a dc control power supply KM, a closing circuit connected to the dc control power supply KM and used for closing the circuit breaker, an open-close amount signal loop connected in parallel to the closing circuit, and an energy storage state indicating circuit. The non-stored energy switching value signal loop comprises a normally closed switch in the energy storage switch group 1, and before the closing spring is fully stored, the non-stored energy switching value signal loop is in a connected state to indicate that the closing spring is not stored with energy. The energy storage state indicating circuit comprises a normally open switch in the energy storage switch group 1. The operating mechanism of the closing spring comprises a switch toggle mechanism, when the closing spring is fully charged, each switch in the energy storage switch group 1 is toggled through the switch toggle mechanism so that each switch can change the state, and therefore the energy storage state indicating circuit is switched on to indicate that the closing spring is fully charged, and meanwhile, a non-charged switching value signal loop is switched off. Wherein, each switch in the energy storage switch group 1 may be a micro switch.
The closing circuit comprises a closing control switch 1KK, devices in the microcomputer protection measurement and control device 2, a normally open switch in the energy storage switch group 1, an auxiliary normally closed contact QF of the breaker and a closing coil HQ. Further, the device in the microcomputer protection measurement and control device 2 included in the closing circuit includes a closing relay coil HBJ. The normally open switch in the energy storage switch group 1 included in the closing circuit is a first normally open switch SP1, and the first normally open switch SP1 is connected in series in the closing circuit. The full energy storage of the closing spring is a necessary condition for closing the circuit breaker.
The circuit for controlling and monitoring the energy storage of the spring of the circuit breaker in the embodiment further comprises a direct current switching-on power supply HM and an energy storage loop which is connected with the direct current switching-on power supply HM and stores the energy for the switching-on spring. The energy storage loop comprises an energy storage change-over switch SA, a normally closed switch in the energy storage switch group 1 and an energy storage motor M. The normally closed switch in the energy storage switch group 1 included in the energy storage circuit is a first normally closed switch SP 4. And the energy storage loop is switched on, the closing spring starts to store energy, and when the closing spring is fully stored, the first normally closed switch SP4 in the energy storage loop is switched off through the switch toggle mechanism, so that the energy storage loop is automatically cut off.
The tank status indication circuit may comprise a tank position indication circuit connected in parallel with the tank circuit. The energy storage position indicating circuit comprises an energy storage position indicating lamp HY and a normally open switch in the energy storage switch group 1. The normally open switch in the energy storage switch group 1 included in the energy storage position indication circuit is a second normally open switch SP 5. When the closing spring is full of energy, the second normally-open switch SP5 in the energy storage position indicating circuit is closed through the switch toggle mechanism, the energy storage position indicating circuit is switched on, and the energy storage position indicating lamp HY is lightened to indicate full energy storage. The energy storage position indicator HY is, for example, a yellow indicator on the upper control cabinet door panel of the switch cabinet.
The energy storage state indicating circuit can comprise an energy storage state display circuit connected with the closing circuit in parallel. The energy storage state display circuit comprises a switch state indicator 3 and a normally open switch in the energy storage switch group 1. The normally open switch in the energy storage switch group 1 included in the energy storage state display circuit is a third normally open switch SP 3. The switch state indicator 3 comprises a digital display tube. For example, the digital display tube can display two colors, when the digital display tube is red, the closing spring is in a full energy storage state, and when the digital display tube is green, the closing spring is in a non-energy storage state. When the closing spring is full of energy, the third normally open switch SP3 in the energy storage state display circuit is closed through the switch toggle mechanism, the energy storage state display circuit is switched on, and the digital display tube in the switch state indicator 3 is red, so that full energy storage indication is performed.
The non-energy-storage switching value signal loop comprises devices in the microcomputer protection measurement and control device 2 and a normally closed switch in the energy storage switch group 1. Further, the device in the microcomputer protection measurement and control device 2 included in the non-energy-storage switching value signal loop includes an indicator lamp LD, communication interfaces S3 and S4, and a resistor R. The normally closed switch in the energy storage switch group 1 included in the non-energy storage switching value signal circuit is a second normally closed switch SP 2. When the energy of the closing spring of the circuit breaker is not stored or the energy storage is unsuccessful, the switching value signal loop which is not stored is in a connected state, and an indicator lamp LD in the microcomputer protection measurement and control device 2 is lightened to indicate that the closing spring is not stored. When the closing spring is fully charged, the second normally closed switch SP2 in the non-charged switching value signal loop is switched off through the switch toggle mechanism, the non-charged switching value signal loop is cut off, and the indicating lamp LD in the microcomputer protection measurement and control device 2 is turned off. Alternatively or additionally, the microcomputer protection measurement and control device 2 in the non-energy-storage switching value signal loop can detect that the second normally-closed switch SP2 is in a closed state, can transmit the non-energy-storage switching value switching-in signal of the closing spring to the background monitoring microcomputer through the communication interfaces S3 and S4 in a communication manner, and can remind an operator of the attention through the alarm of the background monitoring microcomputer, such as a sound and/or light alarm, at this time, the closing operation of the circuit breaker cannot be performed.
The switching-on circuit, the non-energy-storage switching value signal circuit and the energy storage state display circuit are all powered by a direct-current control power supply KM. The dc control power supply KM is, for example, a dc voltage of 220V. The energy storage loop and the energy storage position indicating circuit are both powered by a direct current switching-on power supply HM. The dc switching power supply HM has a dc voltage of 240V, for example.
The switch toggle mechanism may include a small bent plate attached to a crank of the spring stored energy operating mechanism or a cam plate attached to the ratchet. When the closing spring is full of energy, the crank controls the small bent plate or the cam plate to press down each switch in the energy storage switch group 1.
The specific working process of the control and monitoring circuit for the energy storage of the spring of the circuit breaker in the embodiment is as follows:
the energy storage conversion switch SA in the rotary energy storage loop is closed, the energy storage loop is switched on, the energy storage motor M starts to store energy for the closing spring, the shaft sleeve is driven by a large turbine in the reduction gearbox, when the pawl enters a gap on the cam, the energy storage shaft is driven to rotate, the closing spring is pulled up to store energy, when the closing spring is pulled to the maximum, the closing spring is locked by the closing pawl, and at the moment, the closing spring stores full energy.
When the closing spring is fully charged, a small connecting rod on a crank of the spring energy storage operating mechanism drives a small bent plate or a cam plate connected with the ratchet wheel presses down each switch in the energy storage switch group 1. The first normally closed switch SP4 in the energy storage loop is opened, and the energy storage motor M is cut off. Meanwhile, a second normally-open switch SP5 of the energy storage position indicating circuit is closed, the energy storage position indicating circuit is switched on, and a yellow energy storage position indicating lamp HY on a control cabinet door panel on the upper side of the switch cabinet is lightened to indicate that a closing spring is fully charged. Meanwhile, a third normally open switch SP3 in the energy storage state display circuit is closed, the energy storage state display circuit is switched on, a digital display tube in the switch state indicator 3 is red, and the state that the closing spring is fully stored is displayed. Meanwhile, a second normally-closed switch SP2 in the non-energy-storage switching value signal loop is switched off, the non-energy-storage switching value signal loop is cut off, and an indicator light LD on a panel of the microcomputer protection measurement and control device 2 is turned off. Meanwhile, a first normally open switch SP1 in the closing circuit is closed, so that preparation is made for the closing operation of the circuit breaker.
First normally open switch SP1 among the combined floodgate circuit is closed, when operation combined floodgate control switch 1KK carried out circuit breaker combined floodgate operation, combined floodgate control switch 1 KK's combined floodgate contact 1 and combined floodgate contact 2 closed, combined floodgate relay coil HBJ got electric, combined floodgate coil HQ got electric, HBJ's contact self-sustaining, under operating device's effect, accomplished the combined floodgate operation of circuit breaker.
If the closing spring does not store energy or the energy storage is unsuccessful, a second normally closed switch SP2 in the non-energy-storage switching value signal loop is always in a closed state, the non-energy-storage switching value signal loop is in a connected state, an indicator lamp LD on a panel of the microcomputer protection measurement and control device 2 is lightened, and the non-energy-storage alarm of the closing spring is displayed. Alternatively or additionally, the microcomputer protection and measurement and control device 2 in the non-stored energy switching value signal loop can detect that the second normally-closed switch SP2 is in a closed state, a switching-on spring non-stored energy switching value switching-in signal can be transmitted to the background monitoring microcomputer through communication of the communication interfaces S3 and S4 of the microcomputer protection and measurement and control device 2 on the non-stored energy switching value signal loop, the background monitoring microcomputer reminds an operator of the non-stored energy switching value switching-in signal in a sound and/or light-emitting alarm mode, at the moment, switching-on operation cannot be carried out, or when the switching-on operation is unsuccessful, whether the spring non-stored energy fault occurs can be quickly determined through checking alarm.
The control and monitoring circuit for energy storage of the spring of the circuit breaker can realize background monitoring alarm of the fault of the spring energy storage loop and quick search of the fault of the energy storage loop, and improve the efficiency of fault search.
The following is a spring energy storage loop fault finding for a control monitoring circuit utilizing the spring energy storage of the circuit breaker, to name a few application examples.
Example 1: alarm fault of' no stored energy of closing spring
The fault phenomenon is as follows: after a certain switch cabinet is overhauled, power is ready to be supplied, but the background monitoring microcomputer and the microcomputer protection measurement and control device 2 both display the alarm of 'no energy storage of a closing spring'.
The treatment process comprises the following steps: is the spring not storing energy? The staff looks at the digital display tube in the switch state indicator 3, and the digital display tube is red, which indicates that the spring is fully charged. Meanwhile, a yellow indicator lamp for checking the energy storage position is turned on, which also indicates that the spring is fully charged, and why is an alarm of "the closing spring is not charged? And (3) checking the microcomputer protection measurement and control device 2 on the control cabinet door of the switch cabinet, and resetting the displayed spring non-energy-storage alarm information, wherein the spring non-energy-storage alarm is not returned.
The spring is fully charged, and the alarm information of 'spring not charged with energy' can not be reset, which shows that the signal loop of the non-charged switching value has a fault. The possible reasons for the analysis are: after the energy storage of the closing spring is finished, the second normally-closed switch SP2 in the energy storage switch group 1 should be immediately opened, and may actually be still closed, and a closing spring non-energy storage switching value opening signal is always sent to the microcomputer protection measurement and control device 2 to prompt that the spring is not stored with energy. The second normally closed switch SP2 may have been burnt and damaged and cannot be opened. And (3) disconnecting the direct-current control power supply KM switch, and when the spring releases energy and the spring is fully charged, respectively testing a second normally closed switch SP2 in the energy storage switch group 1 by using a resistance gear of the multimeter, wherein the SP2 is uniformly and directly conducted, so that the situation that the second normally closed switch SP2 is damaged and a contact cannot be disconnected is shown, the spring is always connected with a non-energy-storage switching value, a signal loop is opened, and error alarm information of 'spring non-energy-storage' is sent. The second normally closed switch SP2 is replaced and then returns to normal.
Example 2: breaker closing circuit fault
The fault phenomenon is as follows: a certain 110kV transformer substation organizes cleaning of electrical equipment in spring, protection linkage verification test is carried out on a certain 10kV circuit breaker 1001, and switching-on can not be successfully carried out when an operator on duty operates in the background monitoring machine remote-closing operation.
The treatment process comprises the following steps: whether the peripheral condition of the closing of the circuit breaker is met or not is checked firstly, the spring energy storage motor M is found to work normally through checking, the energy storage position indicating lamp HY works normally, and the alarm information of 'spring energy storage failure' is not sent. The energy storage loop, the energy storage position indication signal loop and the non-energy storage switching value signal loop work normally, the auxiliary normally closed contact QF of the breaker in the closing loop of the breaker is checked and tested to be normally closed, when the first normally open switch SP1 in the energy storage switch group 1 connected in series in the closing loop is further tested by using the resistance grade of a multimeter, the switch is tested to be not conducted, namely, the switch cannot act and close timely when the spring is fully stored, and the situation that the switch is possibly in poor contact or damaged is shown. The normally open contact is damaged after the wiring is removed, and the first normally open switch SP1 is replaced by a new one to restore normal operation.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A control and monitoring circuit for energy storage of a breaker spring is characterized by comprising a direct current control power supply (KM), a closing circuit which is connected with the direct current control power supply (KM) and is used for closing the breaker, a non-energy-storage switching value signal loop which is connected with the closing circuit in parallel, and an energy storage state indicating circuit, wherein,
the non-energy-storage switching value signal loop comprises a normally closed switch in an energy storage switch group (1), and before the closing spring is fully charged, the non-energy-storage switching value signal loop is in a switch-on state and indicates that the closing spring is not charged;
the energy storage state indicating circuit comprises a normally open switch in the energy storage switch group (1);
the operating mechanism of the closing spring comprises a switch toggle mechanism, when the closing spring is fully charged, each switch in the energy storage switch group (1) is toggled through the switch toggle mechanism so that each switch changes the state, the energy storage state indicating circuit is switched on to indicate that the closing spring is fully charged, and meanwhile, the non-energy-storage switching value signal loop is switched off.
2. The circuit breaker spring energy storage control monitoring circuit according to claim 1, characterized in that, the closing circuit includes closing control switch (1KK), device in microcomputer protection measurement and control device (2), normally open switch in energy storage switch group (1), breaker auxiliary normally closed contact (QF), and closing coil (HQ), wherein, device in microcomputer protection measurement and control device (2) includes closing relay coil (HBJ), normally open switch is first normally open switch (SP 1).
3. The circuit for controlling and monitoring energy storage of the spring of the circuit breaker according to claim 1, further comprising a dc switching power supply (HM) and an energy storage loop connected to the dc switching power supply (HM) for storing energy for the switching spring.
4. The circuit breaker spring energy storage control and monitoring circuit according to claim 3, characterized in that the energy storage loop comprises an energy storage transfer Switch (SA), a normally closed switch in an energy storage switch group (1), and an energy storage motor (M), wherein the normally closed switch is a first normally closed switch (SP 4).
5. The circuit for controlling and monitoring spring energy storage of a circuit breaker of claim 3, wherein said energy storage status indicating circuit comprises an energy storage position indicating circuit in parallel with said energy storage circuit.
6. The circuit breaker spring energy storage control and monitoring circuit according to claim 5, characterized in that the energy storage position indicating circuit comprises an energy storage position indicating lamp (HY) and a normally open switch in the energy storage switch group (1), wherein the normally open switch is a second normally open switch (SP 5).
7. The circuit breaker spring energy storage control monitoring circuit of claim 1 or 5, wherein the energy storage state indicating circuit comprises an energy storage state display circuit in parallel with the closing circuit.
8. The circuit breaker spring energy storage control and monitoring circuit according to claim 7, characterized in that the energy storage state display circuit comprises a switch state indicator (3) and a normally open switch in the energy storage switch group (1), wherein the normally open switch is a third normally open switch (SP 3).
9. The control and monitoring circuit for spring energy storage of circuit breaker according to claim 8, characterized in that said switch status indicator (3) comprises a digital display tube.
10. The circuit for controlling and monitoring spring energy storage of a circuit breaker according to claim 1, wherein the non-energy-storage switching value signal loop comprises a device in a microcomputer protection measurement and control device (2) and a normally-closed switch in an energy storage switch group (1), wherein the device in the microcomputer protection measurement and control device (2) comprises an indicator Lamp (LD) and communication interfaces (S3 and S4), and the normally-closed switch is a second normally-closed switch (SP 2).
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| CN112431821A (en) * | 2020-11-11 | 2021-03-02 | 中国南方电网有限责任公司超高压输电公司昆明局 | Early warning device for hydraulic disc spring mechanism of high-voltage circuit breaker |
| CN112908800A (en) * | 2019-11-19 | 2021-06-04 | 浙江正泰电器股份有限公司 | Electric energy storage system of circuit breaker |
| CN113922332A (en) * | 2021-09-26 | 2022-01-11 | 国网浙江省电力有限公司电力科学研究院 | A circuit breaker energy storage motor protection and control system and method |
| CN117890730A (en) * | 2023-11-02 | 2024-04-16 | 国网江苏省电力有限公司淮安供电分公司 | Coil insulation fault detection and early warning device of high-voltage circuit breaker and use method |
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| CN112908800A (en) * | 2019-11-19 | 2021-06-04 | 浙江正泰电器股份有限公司 | Electric energy storage system of circuit breaker |
| CN112431821A (en) * | 2020-11-11 | 2021-03-02 | 中国南方电网有限责任公司超高压输电公司昆明局 | Early warning device for hydraulic disc spring mechanism of high-voltage circuit breaker |
| CN112431821B (en) * | 2020-11-11 | 2021-10-01 | 中国南方电网有限责任公司超高压输电公司昆明局 | Early warning device for hydraulic disc spring mechanism of high-voltage circuit breaker |
| CN113922332A (en) * | 2021-09-26 | 2022-01-11 | 国网浙江省电力有限公司电力科学研究院 | A circuit breaker energy storage motor protection and control system and method |
| CN117890730A (en) * | 2023-11-02 | 2024-04-16 | 国网江苏省电力有限公司淮安供电分公司 | Coil insulation fault detection and early warning device of high-voltage circuit breaker and use method |
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