CN111398800A - Circuit breaker fault finding method - Google Patents
Circuit breaker fault finding method Download PDFInfo
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- CN111398800A CN111398800A CN202010191454.7A CN202010191454A CN111398800A CN 111398800 A CN111398800 A CN 111398800A CN 202010191454 A CN202010191454 A CN 202010191454A CN 111398800 A CN111398800 A CN 111398800A
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- circuit breaker
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- power supply
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
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- General Physics & Mathematics (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a breaker fault finding method, which comprises the following steps: checking whether the voltage of the direct-current control power supply is normal, if not, successfully opening and closing the circuit breaker after processing, and if so, checking whether an opening and closing position indicator lamp of the circuit breaker on the microcomputer protection measurement and control device is on; if the circuit breaker can not be lightened, checking whether the fault is a common circuit part from a circuit breaker opening and closing coil to a direct current negative power supply, and if the fault can be lightened, checking whether the gas pressure of the circuit breaker is abnormal; if yes, inflating, and after gas leakage treatment, opening and closing the breaker in place by remote control can be successful; if not, checking whether the remote position contact point of the remote local transfer switch, the contact point of the electric coding lock and the public connecting line part of the direct current positive power supply are in poor connection; and if the internal fault of the protection measurement and control device is judged to be a fault, the circuit breakers are normally switched on and off after the processing, and if the internal fault is not judged to be a fault, the internal fault of the protection measurement and control device is judged to be protected. The searching method can realize the rapid searching of the fault which is not successful in the remote control on-site switching-on and switching-off operation of the circuit breaker.
Description
Technical Field
The invention relates to the technical field of breaker fault maintenance, in particular to a breaker fault finding method.
Background
The circuit breaker is important electrical equipment of a power system, and plays an important role in ensuring safe and stable operation of a power grid in normal and reliable operation and rapid diagnosis and treatment of faults. At present, microcomputer protection and an automatic system thereof are widely applied, and the functions of operation, monitoring and the like of a power grid system are greatly improved, however, faults such as a direct-current power supply, a circuit breaker electric control loop, circuit breaker gas pressure, a circuit breaker operation executing mechanism, relay protection and the like often cause unsuccessful opening and closing operations of the circuit breaker, and cause unnecessary troubles for the operation of power supply equipment and the safe and stable operation of the power grid system.
The fault of the secondary circuit of the microcomputer protection type breaker opening and closing is sometimes occurred, and the searching method is different from that of the conventional protection circuit, so that the method for searching the fault of the breaker remote control and local opening and closing is provided, the quick searching of the fault point can be realized when the fault of the breaker remote control and local opening and closing is not successful, the operation efficiency of the breaker is improved, and the safe and stable operation of a power supply system is ensured, which is of great importance.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a fault finding method (using SF) for a circuit breaker6Type circuit breaker as an example). The specific technical scheme is as follows:
a fault finding method for a circuit breaker is suitable for fault finding when remote control and local opening and closing operations of the circuit breaker are unsuccessful, and comprises the following steps: checking whether the voltage of the direct-current control power supply is normal, if not, successfully opening and closing the circuit breaker after processing, and if so, checking whether a circuit breaker opening and closing position indicator lamp on the microcomputer protection measurement and control device is on; if the circuit breaker can not be lightened, checking whether the fault is a common circuit part from a circuit breaker opening and closing coil to a direct current negative power supply, and if the fault can be lightened, checking whether the gas pressure of the circuit breaker is abnormal; if yes, inflation is needed, and after gas leakage fault treatment, remote control and on-site switching-on and switching-off of the circuit breaker can be successful; if not, checking whether the far direction contact of the far local transfer switch (1QK), the contact of the electric code lock 11S and the common connecting wire part of the direct current positive power supply are in poor connection; if yes, the processed circuit breakers are normally switched on and switched off, and if not, the internal fault of the measurement and control device is protected.
For the above method for finding a fault of a circuit breaker, checking whether the voltage of the direct current control power supply is normal, further comprising: and judging whether the voltage of the direct current control power supply is more than 85% of the rated working voltage, if so, judging that the voltage is normal, and if not, judging that the voltage is abnormal.
For the circuit breaker fault finding method, a universal meter voltage level is adopted to measure the direct current control power supply voltage.
For the method for searching the fault of the circuit breaker, whether the fault is a common circuit part from the opening and closing coil of the circuit breaker to the direct current negative power supply is checked, and the method further comprises the following steps: checking whether the connection between one side of a closing coil (HQ) and/or a separating coil (TQ) of the circuit breaker close to the negative power supply and a negative power supply public connection terminal row is good or not; and checking whether the connection of the connection on the negative power supply public connection terminal row and the negative power supply of a circuit breaker (1DK) of the circuit breaker opening and closing control circuit is good.
For the above circuit breaker troubleshooting method, checking whether the circuit breaker gas pressure is abnormal further includes: checking SF6And if the gas pressure pointer in the density controller indicates that the gas pressure is in a low-pressure locking area, the density controller judges that the gas pressure is too low to lock, and at the moment, a gas pressure abnormal contact QY is closed and needs to be inflated.
The method for finding the fault of the circuit breaker checks whether the far position contact of the far position local transfer switch (1QK), the contact of the electric code lock 11S and the public connecting wire part of the direct current positive power supply are in poor connection or not, and further comprises the step of checking whether the far position contact ⑤ of the far position local transfer switch (1QK), the contact ① of the electric code lock 11S and the connection on the positive power supply public connecting wire row of the direct current positive power supply are in good connection or not.
The method for finding the fault of the circuit breaker checks whether the far position contact of the far position transfer switch (1QK), the contact of the electric code lock 11S and the public connecting line part of the direct current positive power supply are in poor connection or not, and further comprises the step of respectively detecting whether the far position contact ⑤ of the far position transfer switch (1QK) and the contact ① of the electric code lock 11S are all +110V to the ground voltage or not by using a universal meter voltage level.
According to the breaker fault finding method, after the internal fault of the protection measurement and control device is judged, the microcomputer protection measurement and control device operation plug-in board is replaced, and whether the fault is eliminated after replacement is checked.
For the circuit breaker fault finding method, the voltage of the direct-current control working power supply of the circuit breaker opening and closing operation control circuit is 220V.
The technical scheme of the invention has the following main advantages:
the method for searching the fault of the circuit breaker solves the problems that the method for searching the fault of the remote control on-site switching-on and switching-off operation of the circuit breaker in the prior art is backward, the efficiency of searching the fault is low and the safe and stable operation of power grid equipment is influenced, can quickly position and eliminate the fault of the circuit breaker and ensures the safe and stable operation of power supply equipment.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a typical remote-control local opening and closing electrical control circuit of a circuit breaker in the prior art;
fig. 2 is a flowchart of a method for finding a fault 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 present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The technical scheme provided by the embodiment of the invention is described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a typical remote-control local opening and closing electric control circuit of a circuit breaker in the prior art. In order to more clearly illustrate the technical scheme of the invention, the principle of the remote control local opening and closing electric control circuit of the circuit breaker and the working process thereof are firstly introduced.
As shown in fig. 1, the following conditions should be firstly met before the circuit breaker is switched on and off to stop power transmission: 1) the direct-current power supply circuit breaker 1DK normally supplies power, and the voltage of the direct-current working power supply KM is normally 220V; 2) when the circuit breaker such as a handcart type circuit breaker is in a working position, the working position normally open contact S9 is connected; 3) an auxiliary normally closed contact QF1 of the circuit breaker is switched on (when the circuit breaker is in an opening position, the contact is closed); 4) circuit breaker of spring energy storage operating mechanismAfter the spring is fully charged, the spring energy storage normally open contact SP1 is connected; 5) the auxiliary normally open contact QF2 of the circuit breaker is turned on (when the circuit breaker is in the closing position, the contact is closed) 6) SF6The gas pressure is normal, and the contact point QY of the intermediate relay for monitoring the gas pressure abnormality is in the open position.
When the remote control opening and closing operation is carried out, the normally open contact of the remote control opening and closing relay YTJ is closed, the opening and closing control circuit is switched on, the opening and closing coil HQ is electrified, the electromagnet is attracted and touches the primary operation mechanism of the circuit breaker, and finally the remote control operation of the circuit breaker is successfully completed.
Before the on-site operation of the breaker is selected, the microcomputer five-prevention electric coding lock 11S is inserted into a lock cylinder of a panel of a switch cabinet, then the connection points ① and ② of the 11S are closed, then an operation handle of a remote on-site change-over switch 1QK is rotated to the on-site position, if the on-site switching-on operation is carried out, the on-site switching-on loop contacts ① and ② of the 1QK are closed, a switching-on control circuit is connected, a switching-on coil HQ is electrified, an electromagnet is attracted to act to touch a primary operation mechanism of the breaker, and finally the on-site switching-on operation of the breaker is successfully completed, if the on-site switching-off operation is carried out, the on-site switching-off loop contacts ⑨ and ⑩ of the 1QK are closed, a switching-off control circuit is connected, a switching-off coil TQ is electrified, an electromagnet is attracted to act.
The circuit breaker remote control local switching-on/off electric control loop further comprises at least a coil of a switching-on holding relay HBJ and a self-holding contact thereof, a coil of a switching-off holding relay TBJ and a self-holding contact thereof, a switching-off position monitoring relay coil TWJ, a switching-on position monitoring relay coil HWJ, a protection tripping outlet relay contact BTJ, a first switching-off position monitoring indicator lamp HG, a second switching-off position monitoring indicator lamp L D, a first switching-on position monitoring indicator lamp HR, a second switching-on position monitoring indicator lamp HD, a remote control switching-on/off hard pressure plate 1L P2, a protection tripping hard pressure plate 1L P3 and an electric coding lock 11S, wherein the first switching-on position monitoring indicator lamp HG is a green lamp located on a microcomputer protection measurement and control device, the HG lamp can be used for monitoring the integrity of a switching-on circuit, the second switching-off position monitoring indicator lamp L D is a green lamp located on a control cabinet door panel of a high-voltage switch cabinet, the first switching-on position monitoring indicator lamp HR is a red lamp located on a microcomputer protection device, the normal switching-on the microcomputer protection measurement and on the switching-off control device, the second switching-on the switching-off position monitoring indicator lamp is located on the normal switching-off position monitoring switch panel HD 2, and on the switching-.
Fig. 2 is a flowchart of a method for finding a fault that a remote control and a local opening/closing operation of a circuit breaker are not successful according to an embodiment of the present invention. Taking the circuit breaker remote control in-place opening and closing electric control circuit shown in fig. 1 as an example, as shown in fig. 2, the method for finding the fault that the circuit breaker remote control and in-place opening and closing operation are unsuccessful comprises the following steps:
s101: after the remote control and the local opening and closing of the circuit breaker are not successful,
s102: checking whether the voltage of the direct-current control power supply is normal, if not, the circuit breaker can realize successful opening and closing after processing, and if so, checking whether a circuit breaker opening and closing position indicator lamp on the microcomputer protection measurement and control device is on;
specifically, the criterion for determining whether the dc control power supply voltage is normal is as follows: and checking whether the direct-current power supply voltage of the total circuit breaker of the circuit breaker opening and closing control circuit is rated 220V or not, wherein the normal operation working power supply voltage is lowest and cannot be lower than 220V 85%, and when the working power supply voltage is lower than 220V 85% and is 185V, the working power supply voltage is abnormal, and the checking treatment is needed. During inspection, a multimeter voltage level can be adopted for testing.
S103: if not, after the voltage fault is processed, the remote control and the local opening and closing of the circuit breaker can be successful.
S104: if yes, checking whether a breaker switching-on and switching-off position indicator lamp on the microcomputer protection measurement and control device is turned on.
S105: if not, the circuit is not lightened, the fault is detected to be a common circuit part from a circuit breaker opening and closing coil to a direct current negative power supply, and the condition of poor wiring is possible;
specifically, the operation procedure of checking whether the wiring is defective is as follows: whether the connection between one side of a closing coil (HQ) and one side of a separating coil (TQ) of the circuit breaker close to the negative power supply and the connection on the negative power supply public connection terminal row is good or not is judged; and checking whether the connection between the connection on the negative power supply public connection terminal row and the negative power supply of the circuit breaker 1DK of the circuit breaker opening and closing control circuit is good or not.
After bad treatment of the connection, the remote control and on-site switching-on and switching-off of the circuit breaker can be successful.
S106: if the circuit breaker can be lighted, whether the gas pressure of the circuit breaker is abnormal is checked.
Specifically, SF is checked6If the gas pressure of the density controller is too low, SF when the gas pressure is too low to the occlusion region6The corresponding contact of density controller can be closed, the unusual intermediate relay coil circuit of pressure has been put through, the intermediate relay coil is electrified, at this moment, unusual contact QY of pressure can be closed, this contact closure has put through separating brake pressure relay TYJ coil respectively, the electric circuit at closing pressure relay HYJ coil (both coils all are located microcomputer protection device) place, TYJ coil and HYJ coil are all electrified, its normally closed contact all breaks off, the circuit breaker divide-shut brake electric control circuit has been cut off respectively, cause the unable divide-shut brake operation of circuit breaker.
S107: if the gas pressure is too low, the gas pressure needs to be too low for SF6The circuit breaker is inflated, and after the air leakage fault is processed, the remote control and on-site switching-on and switching-off of the circuit breaker can be successful.
It should be noted that, in the event of an abnormal low pressure condition of the circuit breaker, the general substation is equipped with a low pressure abnormal alarm monitoring system, but for various reasons, such as a possible pressure abnormal alarm monitoring systemThe fault is not configured originally, so that some background monitoring machines of the transformer substation cannot give an alarm in time when the gas pressure is low, and the fault can only be checked and removed on site when the abnormal fault of the low gas pressure occurs. Therefore, during normal operation of the circuit breaker, SF should be ensured6The reliability of the circuit breaker pressure abnormity alarm monitoring system.
S108: if not, namely the pressure is normal, the remote direction contact of the remote local transfer switch (1QK), the contact of the electric code lock 11S and the common connecting wire part of the direct current positive power supply are checked whether the connection is poor.
Specifically, the checking process includes checking whether the remote site contact ⑤ of the remote site transfer switch (1QK), the contact ① of the electric code lock 11S and the positive power supply common terminal row of the direct current positive power supply are well wired, and further, respectively detecting whether the remote site contact ⑤ of the remote site transfer switch (1QK) and the contact ① of the electric code lock 11S are all +110V in voltage to ground by using a multimeter voltage level.
S109: if the fault of bad wiring is processed, the remote control and the on-site switching-on and switching-off of the circuit breaker are normal.
S110: if not, the internal fault of the measurement and control device is protected,
s111: the operating card of the protection device needs to be replaced.
In summary, the method for finding a fault of a circuit breaker provided by the embodiment of the invention solves the problems that the method for finding a fault of a circuit breaker in a remote control on-site switching-on/off operation is lagged behind, the fault finding efficiency is low, and the safe and stable operation of power grid equipment is influenced aiming at the fault that both the remote control on-site switching-on/off operation and the local switching-on/off operation are unsuccessful, and can ensure the safe and stable operation of power supply equipment.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. In addition, "front", "rear", "left", "right", "upper" and "lower" in this document are referred to the placement states shown in the drawings.
Finally, it should be noted that: the above examples are only for illustrating the technical solutions of the present invention, and not for limiting the same; 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 (9)
1. A fault finding method for a circuit breaker is characterized in that the method is suitable for fault finding when remote control and local opening and closing operations of the circuit breaker are unsuccessful, and the method comprises the following steps:
checking whether the voltage of the direct-current control power supply is normal, if not, successfully opening and closing the circuit breaker after processing, and if so, checking whether a circuit breaker opening and closing position indicator lamp on the microcomputer protection measurement and control device is on;
if the two can not be lighted, checking whether the fault is a common circuit part from the opening and closing coil of the circuit breaker to the direct current negative power supply, and if the fault can be lighted, checking SF6Whether the breaker gas pressure is abnormal;
if yes, inflation is needed, and after gas leakage fault treatment, remote control and on-site switching-on and switching-off of the circuit breaker can be successful; if not, checking whether the far direction contact of the far local transfer switch (1QK), the contact of the electric code lock (11S) and the common connecting wire part of the direct current positive power supply are in poor connection;
and if the internal fault of the protection measurement and control device is judged to be a fault, the circuit breakers are normally switched on and off after the processing, and if the internal fault is not judged to be a fault, the internal fault of the protection measurement and control device is judged to be protected.
2. The circuit breaker troubleshooting method of claim 1 wherein checking whether the dc control supply voltage is normal further comprises:
and judging whether the voltage of the direct current control power supply is more than 85% of the rated working voltage, if so, judging that the voltage is normal, and if not, judging that the voltage is abnormal.
3. The circuit breaker troubleshooting method of claim 2 wherein the direct current control supply voltage is measured using a multimeter voltage range.
4. The circuit breaker troubleshooting method of claim 1 wherein checking whether the fault is a common circuit portion of the circuit breaker opening and closing coil to the negative dc power supply further comprises:
checking whether the connection between one side of a closing coil (HQ) and/or a separating coil (TQ) of the circuit breaker close to the negative power supply and a negative power supply public connection terminal row is good or not;
and checking whether the connection of the connection on the negative power supply public connection terminal row and the negative power supply of a circuit breaker (1DK) of the circuit breaker opening and closing control circuit is good.
5. The circuit breaker troubleshooting method of claim 1, wherein checking whether a circuit breaker gas pressure is abnormal further comprises:
checking SF6And if the gas pressure pointer in the density controller indicates that the gas pressure is in a low-pressure locking area, the density controller judges that the gas pressure is too low to lock, and at the moment, a gas pressure abnormal contact QY is closed and needs to be inflated.
6. The circuit breaker troubleshooting method of claim 1 wherein checking whether the remote location contact of the remote local transfer switch (1QK), the contact of the electronic coded lock 11S, and the common connection line portion of the dc positive power supply are miswired further comprises:
it is checked whether the remote site contact ⑤ of the remote site changeover switch (1QK), the contact ① of the electronic code lock 11S and the positive power supply common terminal row of the direct current positive power supply are wired well.
7. The circuit breaker troubleshooting method according to claim 6, wherein checking whether a remote direction contact of a remote local transfer switch (1QK), a contact of an electric code lock 11S and a common connection line portion of a direct current positive power supply are not wired well, further comprising:
the multimeter voltage step is used for detecting whether the voltage to the ground of the remote site contact ⑤ of the remote site change-over switch (1QK) and the contact ① of the electronic coded lock 11S is + 110V.
8. The circuit breaker troubleshooting method of claim 1, wherein after determining that the protection measurement and control device has an internal fault, replacing the microcomputer protection measurement and control device operation plug-in board, and checking whether the fault is removed after the replacement.
9. The circuit breaker fault finding method according to claim 1, characterized in that the dc control operating power supply voltage of the circuit breaker opening and closing operation control circuit is 220V.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010191454.7A CN111398800A (en) | 2020-03-18 | 2020-03-18 | Circuit breaker fault finding method |
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| CN202010191454.7A CN111398800A (en) | 2020-03-18 | 2020-03-18 | Circuit breaker fault finding method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112180894A (en) * | 2020-09-16 | 2021-01-05 | 国网山东省电力公司桓台县供电公司 | Electric performance detection device for pole-mounted circuit breaker controller |
| 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB474140A (en) * | 1936-04-03 | 1937-10-26 | British Thomson Houston Co Ltd | Improvements in and relating to methods of testing electric circuit breakers |
| CN106483423A (en) * | 2016-12-05 | 2017-03-08 | 山东钢铁股份有限公司 | A kind of trouble shoot method and device of breaker open operation electric loop |
| CN108287305A (en) * | 2018-01-20 | 2018-07-17 | 山东钢铁集团日照有限公司 | A kind of high voltage circuit breaker closing control loop breakdown judge lookup method |
| CN108631439A (en) * | 2018-04-26 | 2018-10-09 | 山东钢铁股份有限公司 | Breaker remote breaking-closing operating trouble shoot method |
-
2020
- 2020-03-18 CN CN202010191454.7A patent/CN111398800A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB474140A (en) * | 1936-04-03 | 1937-10-26 | British Thomson Houston Co Ltd | Improvements in and relating to methods of testing electric circuit breakers |
| CN106483423A (en) * | 2016-12-05 | 2017-03-08 | 山东钢铁股份有限公司 | A kind of trouble shoot method and device of breaker open operation electric loop |
| CN108287305A (en) * | 2018-01-20 | 2018-07-17 | 山东钢铁集团日照有限公司 | A kind of high voltage circuit breaker closing control loop breakdown judge lookup method |
| CN108631439A (en) * | 2018-04-26 | 2018-10-09 | 山东钢铁股份有限公司 | Breaker remote breaking-closing operating trouble shoot method |
Non-Patent Citations (4)
| Title |
|---|
| 尹庆等: "SF_6断路器气体压力异常在线监测***", 《电世界》 * |
| 张巍等: "控制回路的分合闸监视故障处理优化研究", 《陕西电力》 * |
| 林欣妮: "SF_6断路器控制回路断线故障分析", 《机电信息》 * |
| 薛坤朋: "SF_6断路器拒动的原因及解决方法", 《农村电工》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112180894A (en) * | 2020-09-16 | 2021-01-05 | 国网山东省电力公司桓台县供电公司 | Electric performance detection device for pole-mounted circuit breaker controller |
| 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 |
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