CN111934291B - Method for judging circuit breaker tripping due to stealing and electrical tripping - Google Patents
Method for judging circuit breaker tripping due to stealing and electrical tripping Download PDFInfo
- Publication number
- CN111934291B CN111934291B CN202010705958.6A CN202010705958A CN111934291B CN 111934291 B CN111934291 B CN 111934291B CN 202010705958 A CN202010705958 A CN 202010705958A CN 111934291 B CN111934291 B CN 111934291B
- Authority
- CN
- China
- Prior art keywords
- tripping
- circuit breaker
- breaker
- trip
- electrical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
Landscapes
- Breakers (AREA)
Abstract
The invention relates to the technical field of breaker operation and maintenance, in particular to a method for judging the stealing trip and the electrical trip of a breaker, which comprises the following steps: s1: looking up a monitoring background message, and acquiring the time of a breaker on-position combination SOE message of the breaker in the tripping period and recording as TDL; s2: looking up the monitoring background message, and acquiring the SOE message time of the disconnection action of the first group of control loops in the tripping period of the circuit breaker, and recording as T1; s3: looking up the monitoring background message, and acquiring the SOE message time of the second group of control circuit disconnection actions in the tripping period of the circuit breaker, and recording the SOE message time as T2; s4: and comparing the TDL, the T1 and the T2 of the tripping time period of the circuit breaker, and judging whether the tripping reason of the circuit breaker is the stealing tripping or the electrical tripping of the circuit breaker. The invention has the advantages of reducing the fault finding range, improving the fault finding efficiency, shortening the fault finding time, reducing the power failure loss, and improving the safety of the power grid and the power supply reliability.
Description
Technical Field
The invention relates to the technical field of breaker operation and maintenance, in particular to a method for judging the stealing trip and the electrical trip of a breaker.
Background
As power systems develop, the stable operation of the circuit breaker plays a crucial role in the safe and stable operation of the whole power system. When the circuit breaker is tripped abnormally, particularly when the circuit breaker is tripped without protection action, in order to search a fault point, a pre-test and regular-inspection conventional test project is usually used for carrying out blanket-type full-coverage item-by-item inspection tests on primary equipment and secondary equipment, for example, a circuit trip fault detection method and a system disclosed by CN110376487A have the defects of long time consumption, difficult positioning, low efficiency and the like.
Disclosure of Invention
The invention provides a method for judging the circuit breaker tripping-stealing and electrical tripping for overcoming the defects of long time consumption, difficult positioning and low efficiency of the circuit breaker abnormal tripping inspection in the prior art, and the method has the advantages of reducing the fault finding range, improving the fault finding efficiency and shortening the fault finding time.
In order to solve the technical problems, the invention adopts the technical scheme that: a method for judging the stealing trip and the electrical trip of a circuit breaker comprises the following steps:
s1: looking up a monitoring background message, and acquiring the time of a breaker on-position combination SOE message of the breaker in the tripping period and recording as TDL;
s2: looking up the monitoring background message, and acquiring the SOE message time of the disconnection action of the first group of control loops in the tripping period of the circuit breaker, and recording as T1;
s3: looking up the monitoring background message, and acquiring the SOE message time of the second group of control circuit disconnection actions in the tripping period of the circuit breaker, and recording the SOE message time as T2;
s4: the TDL, T1 and T2 in the tripping time period of the circuit breaker are compared to judge whether the tripping reason of the circuit breaker is the electrical tripping because of the stealing tripping of the circuit breaker, and the electrical tripping reason caused by the tripping operation of a protection, measurement and control or self-installation device or the electrical tripping caused by a secondary circuit or a mechanism box component is further judged by combining the action condition of the protection, measurement and control or self-installation device.
In one embodiment, in step S4, if the TDL is the earliest, the reason for the trip of the breaker is: the circuit breaker steals the jump.
Preferably, in step S4, if T1 is the earliest and there is a protection, measurement and control or safety device to trip, the reason for tripping the breaker is: the first set of electrical trips caused by tripping the action of the protection, monitoring or safety device directly causes the circuit breaker to trip.
Preferably, in step S4, if T1 is the earliest and there is no protection, measurement, or self-protection device to trip, the reason for tripping the breaker is: the first set of electrical trips caused by the secondary circuit or mechanism box components directly cause the circuit breaker to trip.
Preferably, in step S4, if T2 is the earliest and there is a protection, monitoring or self-installation device to act and trip, the reason for tripping the breaker is: the second set of electrical trips caused by tripping of the protection, monitoring or safety device action directly causes the circuit breaker to trip.
Preferably, in step S4, if T2 is the earliest and there is no protection, measurement and control or safety device to act and trip, the reason for tripping the breaker is: the second set of electrical trips caused by the secondary loop or mechanism box components directly causes the circuit breaker to trip.
Preferably, in step S4, if T1 and T2 are the earliest at the same time and there is a protection, measurement and control or self-installation device to trip, the reason for tripping the breaker is: two groups of electrical trips caused by action trips of a protection, measurement and control or self-installation device directly cause tripping of the circuit breaker.
Preferably, in step S4, if T1 and T2 trip at the earliest time and no protection, measurement, or self-protection device is operated, the reason for tripping the circuit breaker is: two sets of electrical trips caused by secondary circuits or mechanism box components directly cause the circuit breaker to trip.
Preferably, in step S4, if TDL and T1 are earliest at the same time, it indicates that the breaker tripping and the first group electrical tripping occur at the same time; if TDL and T2 are the earliest at the same time, the circuit breaker stealing tripping and the second group electrical tripping are simultaneously generated.
Preferably, in step S4, if TDL, T1, and T2 are the same, it indicates that the breaker tripping, the first set of electrical trips, and the second set of electrical trips occur at the same time.
Compared with the prior art, the invention has the following advantages:
the technical means provided by the invention avoids the blindness of searching the abnormal tripping reason of the circuit breaker and avoids a plurality of unnecessary detection items in blanket type full coverage detection, and the technical means can quickly and accurately position the fault to the mechanical fault of the circuit breaker body mechanism or the electrical fault of secondary equipment and a circuit, thereby greatly reducing the fault searching range, improving the fault searching efficiency, greatly shortening the fault searching time, being beneficial to recovering power transmission as soon as possible and reducing the power failure loss.
Drawings
Fig. 1 is an electrical schematic diagram in an embodiment of the invention.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the invention; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the invention.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.
Example (b):
in the present embodiment, as an electrical schematic diagram shown in fig. 1, fig. 1 is explained as follows:
a first set of trip loops:
the wiring terminal 4D1, a contact 1TBJa1-1 of the A-phase tripping holding relay, the wiring terminal 4n709, the A-phase tripping holding relay 1TBJa1-2, the wiring terminal 4D106, a normally open auxiliary contact NC1 of the breaker, a tripping coil TQ1 and a wiring terminal 4D56 are sequentially connected in series;
the wiring terminal 4D1, the a-phase switching-on position relay 1HWJa2, the wiring terminal 4D105 and the wiring terminal 4D106 are sequentially connected in series;
the connecting terminal 4D1, the connecting terminal 4D8, the connecting terminal 3D23, the protection action contact CKJA-1, the first set of protection action outlet pressing plate 3LP1, the connecting terminal 3D105, the connecting terminal 4D96 and the connecting terminal 4n709 are sequentially connected in series;
a second set of trip loops:
the wiring terminal 4D13, a contact 2TBJa1-1 of the A-phase tripping holding relay, the wiring terminal 4n721, the A-phase tripping holding relay 2TBJa1-2, the wiring terminal 4D147, a normally open auxiliary contact NC2 of the breaker, a tripping coil TQ2 and the wiring terminal 4D60 are sequentially connected in series;
the connecting terminal 4D13, the A-phase switching-on position relay 2HWJa2, the resistor R2, the connecting terminal 4D146 and the connecting terminal 4D147 are sequentially connected in series;
the connecting terminal 4D13, the connecting terminal 4D20, the connecting terminal 3D28, the protection action contact CKJA-2, the second set of protection action outlet pressing plate 3LP5, the connecting terminal 3D111, the connecting terminal 4D137 and the connecting terminal 4n721 are sequentially connected in series;
a signal loop:
the wiring terminal 4D29, the A-phase tripping position relay normally closed contact TWJa1-1, the A-phase closing position relay normally closed contact 1HWJa2-1 and the wiring terminal 4D32 are connected in series;
a phase switching-on position relay normally-closed contact 2HWJa2-1 is connected between an A phase tripping position relay normally-closed contact TWJa1-1 and an A phase switching-on position relay normally-closed contact 1HWJa2-1, and the A phase switching-on position relay normally-closed contact 2HWJa2-1 is connected with a connecting terminal 4D 33.
Brief description of protection action outlet trip principle:
taking the first group of phase-a trips as an example, during protection, a protection action contact CKJA-1 is closed, and a secondary loop "positive power supply-connecting terminal 4D 1-connecting terminal 4D 8-connecting terminal 3D 23-protection action contact CKJA-1-first set of protection action outlet pressure plate 3LP 1-connecting terminal 3D 105-connecting terminal 4D 96-connecting terminal 4n 709-phase-a trip holding relay 1TBJa 1-2-connecting terminal 4D 106-breaker normally open auxiliary contact NC 1-trip coil TQ 1-connecting terminal 4D 56-negative power supply" is conducted; after the A-phase tripping holding relay 1TBJa1-2 is excited, a contact 1TBJa1-1 of the A-phase tripping holding relay is closed; the secondary loop 'positive power supply-connecting terminal 4D 1-contact 1TBJa1-1 of A phase tripping holding relay-connecting terminal 4n 709-A phase tripping holding relay 1TBJa 1-2-connecting terminal 4D 106-breaker normally open auxiliary contact NC 1-tripping coil TQ 1-connecting terminal 4D 56-negative power supply' is conducted; the tripping coil TQ1 is excited to drive the breaker to trip; the breaker position is changed from a closed position, the normally open auxiliary contact NC1 of the breaker is opened, and the circuit is changed into an open state.
Brief description of trip loop integrity monitoring principle:
taking a first group of phase-a tripping circuit as an example, when the switch is on, and the protection device and the secondary circuit operate normally, the secondary circuit "positive power supply-connecting terminal 4D 1-phase switching-on position relay 1HWJa 2-series resistor R1-connecting terminal 4D 105-connecting terminal 4D 106-breaker normally-open auxiliary contact NC 1-tripping coil TQ 1-connecting terminal 4D 56-negative power supply" is on, because the resistance values of the phase-a switching-on position relay 1HWJa2 and the series resistor R1 are very large, the current of the whole circuit is very small, the voltage drop of the tripping coil TQ1 is very small, the circuit breaker is not enough to be driven to trip, the phase-a switching-on position relay 1HWJa2 acts, and the phase-a switching-on position relay normally-closed contact 1HWJa2-1 is disconnected; if any node of the circuit is opened, the A-phase closing position relay 1HWJa2 returns, the A-phase closing position relay normally closed contact 1HWJa2-1 is closed, and an operator is reminded to process in time through signaling, so that the integrity of the tripping circuit is monitored.
Brief description of the principle of the control loop disconnection signal:
taking the first group of the A-phase trip circuit as an example, the switch is closed, and the normally closed contact TWJa1-1 of the A-phase trip position relay is in a closed state; if any node of the tripping circuit is open, the A-phase switching-on position relay 1HWJa2 is not electrified, and the A-phase switching-on position relay normally-closed contact 1HWJa2-1 is in a closed state; then a loop formed by connecting the normally closed contact TWJa1-1 of the A-phase tripping position relay and the normally closed contact 1HWJa2-1 of the A-phase switching position relay in series is in a conducting state, and a corresponding control loop disconnection signal can be sent to a monitoring background through a measurement and control device to remind an operator of timely processing.
A method for judging the stealing trip and the electrical trip of a circuit breaker comprises the following steps: s1: looking up a monitoring background message, and acquiring the time of a breaker on-position combination SOE message of the breaker in the tripping period and recording as TDL; s2: looking up a monitoring background message, and acquiring SOE message time of a first group of control loop disconnection actions in a tripping period of the circuit breaker, wherein the SOE message time is recorded as T1; s3: looking up the monitoring background message, and acquiring the SOE message time of the second group of control circuit disconnection actions in the tripping period of the circuit breaker, and recording the SOE message time as T2; s4: and comparing the TDL, T1 and T2 of the tripping time period of the circuit breaker, judging whether the tripping reason of the circuit breaker is the electrical tripping because of the circuit breaker stealing tripping or combining the action condition of a protection, measurement and control or safety device, and further judging whether the tripping reason of the electrical tripping is the electrical tripping caused by the action tripping of the protection, measurement and control or safety device or the electrical tripping caused by a secondary loop or a mechanism box element.
The steps can be respectively applied to the A phase, the B phase and the C phase of the circuit breaker, and if the three-phase linkage circuit breaker does not split the phases.
As shown in fig. 1, taking phase a as an example, in this embodiment, in step S4, if TDL is the earliest, the reason for tripping the circuit breaker is: the breaker steals the jump. If the TDL is earliest, it is described that the breaker auxiliary contacts NC1, NC2 are switched from on to off first, and the normally closed contacts 1HWJa2-1, 2HWJa2-1 of the a-phase closing position relays 1HWJa2, 2HWJa2 are switched from off to on (the trip position relay normally closed contact TWJa1-1 is in a closed state before the breaker is not switched to the right position); then, it is determined that the circuit breaker body mechanism is first switched off by the on/off switch, and the a-phase closing position relays 1HWJa2 and 2HWJa2 are returned because the negative power supply terminal is opened. Experiments show that: when the breaker is tripped due to stealing, the TDL is generally 7-10 ms earlier than T1 and T2.
In step S4, if T1 is the earliest, the reason for the circuit breaker tripping is: the first set of electrical trips directly causes the circuit breaker to trip. If T1 is the earliest, it indicates that the contact 1HWJa2-1 of the closing position monitoring relay 1HWJa2 is switched from open to close (the trip position relay normally closed contact TWJa1-1 is in a closed state before the circuit breaker is not switched in place), and the circuit breaker auxiliary contacts NC1 and NC2 are switched from closed to open; then, it is judged that the first set of trip circuits are conducted so that both ends of the closing position monitor relay 1HWJa2 are equipotential (equivalent to short circuit) and return first, and the first set of trip circuits are conducted so that the trip coil TQ1 is excited to drive the breaker body mechanism and then is subjected to switching variation. There are two possible reasons for the return of the on position monitoring relay 2HWJa 2: 1. the first group of trip circuits are conducted, so that the circuit breaker is tripped to cause the negative power supply end of the 2HWJa2 to be opened; 2. the second set of trip circuits conduct to make the two terminals of the 2HWJa2 equipotential. If both T1 and T2 are earlier than TDL, then this is the 2 nd possibility. Experiments show that: when the first set of trip circuits is conducting to cause a trip, T1 is typically 2ms or more earlier than TDL, depending on the opening speed of the circuit breaker mechanism.
In step S4, if T2 is the earliest, the reason for tripping the breaker is: the second set of electrical trips directly causes the circuit breaker to trip. If T2 is the earliest, it means that the contact 2HWJa2-1 of the closing position monitor relay 2HWJa2 is switched from open to close (the trip position relay normally closed contact TWJa1-1 is in a closed state before the breaker is not switched to the open position), and the breaker auxiliary contacts NC1 and NC2 are switched from closed to open; then, it is judged that the second group trip circuit is conducted so that both ends of the on position monitor relay 2HWJa2 are equipotential (equivalent to short circuit) and return first, and the second group trip circuit is conducted so that the trip coil TQ2 is excited to drive the breaker body mechanism and then is subjected to switching variation. There are two possible reasons for the return of the on position monitoring relay 1HWJa 2: 1. the second group of trip circuits are conducted, so that the circuit breaker causes the negative power supply end of the 1HWJa2 to be opened after being tripped; 2. the first set of trip circuits conduct to make both ends of 1HWJa2 equal potential. If both T1 and T2 are earlier than TDL, then this is the 2 nd possibility. Experiments show that: when the second group of tripping loops are conducted to cause tripping: t2 is typically 2ms or more earlier than TDL, depending on the opening speed of the circuit breaker mechanism.
In step S4, if T1 and T2 are the earliest at the same time, the reason for tripping the breaker is: both sets of electrical trips directly cause the circuit breaker to trip. When T1 and T2 are earliest at the same time, it is described that the contacts 1HWJa2-1 and 2HWJa2-1 of the closing position monitoring relays 1HWJa2 and 2HWJa2 are first switched by opening (the trip position relay normally closed contact TWJa1-1 is in a closed state before the circuit breaker is not opened), and the circuit breaker auxiliary contacts NC1 and NC2 are switched by closing; then, it is judged that the two sets of trip circuits are simultaneously conducted so that the two ends of the on-position monitoring relays 1HWJa2 and 2HWJa2 are equipotential (equivalent to short circuit) and return first, and the two sets of trip circuits are simultaneously conducted so that the trip coils TQ1 and TQ2 are excited to drive the breaker body mechanism and then are subjected to switching separation. Experiments show that: when the two groups of tripping circuits are conducted simultaneously to cause tripping, T1 and T2 are generally earlier than TDL by 2ms or more at the same time, and the tripping speed of the breaker mechanism is determined.
In step S4, if TDL and T1 are the earliest at the same time, it indicates that the breaker stealing trip and the first group of electrical trips occur at the same time; if TDL and T2 are earliest at the same time, indicating that the circuit breaker stealing tripping and the second group of electrical tripping occur at the same time; if TDL, T1, T2 are earliest at the same time, it is indicated that the breaker steal, the first set of electrical trips, and the second set of electrical trips occur at the same time.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (1)
1. A method for judging the stealing trip and the electrical trip of a circuit breaker comprises the following steps:
s1: looking up a monitoring background message, and acquiring the time of a breaker on-position combination SOE message of the breaker in the tripping period and recording as TDL;
s2: looking up a monitoring background message, and acquiring SOE message time of a first group of control loop disconnection actions in a tripping period of the circuit breaker, wherein the SOE message time is recorded as T1;
s3: looking up the monitoring background message, and acquiring the SOE message time of the second group of control circuit disconnection actions in the tripping period of the circuit breaker, and recording the SOE message time as T2;
s4: comparing TDL, T1 and T2 of the tripping time interval of the circuit breaker, judging whether the tripping reason of the circuit breaker is tripping caused by stealing of the circuit breaker or electrical tripping, and further judging whether the tripping reason of the electrical tripping is electrical tripping caused by action of a protection, measurement and control or self-installation device or electrical tripping caused by a secondary circuit or a mechanism box component by combining the action condition of the protection, measurement and control or self-installation device; in the step S4:
if TDL is earliest, the tripping reason of the breaker is as follows: the circuit breaker is stolen;
if T1 is the earliest and has protection, measurement and control or the action of the self-installation device to trip, the reason for tripping the breaker is as follows: the first group of electrical trips caused by action trips of a protection, measurement and control or self-installation device directly cause the circuit breaker to trip;
if T1 is the earliest and no protection, measurement and control or self-installation device action trip, the reason for the breaker trip is: a first set of electrical trips caused by secondary circuits or mechanism box components directly cause the circuit breaker to trip;
if T2 is the earliest and has protection, measurement and control or the action of the self-installation device to trip, the reason for tripping the breaker is as follows: the second group of electrical trips caused by the action trips of the protection, measurement and control or self-installation device directly cause the circuit breaker to trip;
if T2 is the earliest and no protection, measurement and control or self-installation device action trip, the reason for the breaker trip is: a second set of electrical trips caused by secondary circuits or mechanism box components directly cause the circuit breaker to trip;
if T1, T2 are the earliest at the same time and there is protection, measurement and control or the action of the self-installation device to trip, the reason for tripping the breaker is that: two groups of electrical trips caused by action trips of a protection, measurement and control or safety device directly cause tripping of a breaker;
if T1, T2 are the earliest at the same time and no protection, measurement and control or self-installation device action trips, the tripping reason of the circuit breaker is as follows: two groups of electrical tripping caused by secondary circuits or mechanism box components directly cause tripping of the circuit breaker;
if TDL and T1 are the earliest at the same time, indicating that the circuit breaker stealing tripping and the first group electrical tripping occur at the same time; if TDL and T2 are earliest at the same time, indicating that the circuit breaker stealing tripping and the second group of electrical tripping occur at the same time;
if TDL, T1 and T2 are simultaneous, the circuit breaker stealing tripping, the first group electrical tripping and the second group electrical tripping are simultaneously generated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010705958.6A CN111934291B (en) | 2020-07-21 | 2020-07-21 | Method for judging circuit breaker tripping due to stealing and electrical tripping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010705958.6A CN111934291B (en) | 2020-07-21 | 2020-07-21 | Method for judging circuit breaker tripping due to stealing and electrical tripping |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111934291A CN111934291A (en) | 2020-11-13 |
| CN111934291B true CN111934291B (en) | 2022-07-26 |
Family
ID=73314159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010705958.6A Active CN111934291B (en) | 2020-07-21 | 2020-07-21 | Method for judging circuit breaker tripping due to stealing and electrical tripping |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111934291B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112906389B (en) * | 2021-02-04 | 2022-08-26 | 云南电网有限责任公司昆明供电局 | Fault trip discrimination method based on multi-dimensional data analysis |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05325766A (en) * | 1992-05-22 | 1993-12-10 | Mitsubishi Electric Corp | Monitoring device for trip circuit |
| JPH0923565A (en) * | 1995-07-07 | 1997-01-21 | Toshiba Corp | Monitoring circuit of protective relay device |
| CN102393506A (en) * | 2011-11-17 | 2012-03-28 | 江苏省电力公司苏州供电公司 | Monitoring system of tripping pulse of breaker |
| CN109119964A (en) * | 2018-10-29 | 2019-01-01 | 国网辽宁省电力有限公司沈阳供电公司 | Prevent the intelligent controller of switch trip coil burnout |
-
2020
- 2020-07-21 CN CN202010705958.6A patent/CN111934291B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05325766A (en) * | 1992-05-22 | 1993-12-10 | Mitsubishi Electric Corp | Monitoring device for trip circuit |
| JPH0923565A (en) * | 1995-07-07 | 1997-01-21 | Toshiba Corp | Monitoring circuit of protective relay device |
| CN102393506A (en) * | 2011-11-17 | 2012-03-28 | 江苏省电力公司苏州供电公司 | Monitoring system of tripping pulse of breaker |
| CN109119964A (en) * | 2018-10-29 | 2019-01-01 | 国网辽宁省电力有限公司沈阳供电公司 | Prevent the intelligent controller of switch trip coil burnout |
Non-Patent Citations (1)
| Title |
|---|
| SF6断路器偷跳故障的分析;彭思遥;《科技风》;20171210;第178页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111934291A (en) | 2020-11-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102087929B (en) | Controller and the system comprising the controller for detecting its fault | |
| US20120249151A1 (en) | Residual-current circuit breaker | |
| CN106483423B (en) | Fault searching method and device for breaker opening electric loop | |
| CA2365737C (en) | Loop restoration scheme for distribution feeders | |
| CN105572533B (en) | Method for identifying transient fault and permanent fault | |
| CN111934291B (en) | Method for judging circuit breaker tripping due to stealing and electrical tripping | |
| CN102520350B (en) | Circuit for determining lockout states of lockout relays | |
| CN111596206A (en) | F-C switch opening and closing performance online evaluation method | |
| CN112383031B (en) | Switch protection method for power source system for transformer substation | |
| AU2010202580B2 (en) | Device and method for signalling electric faults, unit and electric panel comprising such a device | |
| CN111458633B (en) | Tripping and closing monitoring circuit and fault alarming method | |
| CN109193583B (en) | Control circuit for self-adaptive switching of inner bridge connection short lead protection | |
| CN202794462U (en) | Intelligent fault diagnosis device for opening and closing coils | |
| CN214124818U (en) | Switch protection device for power source system for transformer substation | |
| CN212111688U (en) | Protection device of switch device test system and switch device test system | |
| CN113471939A (en) | Interlocking loop fault monitoring and alarming method in disconnecting link control loop | |
| CN101174516B (en) | State monitoring device for circuit breaker | |
| CN217741297U (en) | Low-voltage circuit breaker secondary circuit fault detection device | |
| CN212229104U (en) | Monitoring circuit of circuit breaker and circuit breaker for nuclear power station | |
| CN112421582B (en) | Switch protection device for power source system for transformer substation | |
| CN218449611U (en) | Monitoring device for anti-tripping loop | |
| CN218470923U (en) | Breaker state detection device and breaker | |
| CN117578743B (en) | Frame circuit breaker trip circuit monitoring system and method | |
| CN111371069B (en) | Overtemperature protection device for transformer | |
| CN219122354U (en) | Test recording device for circuit breaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |