CN112039029A - Controlled anti-tripping circuit of circuit breaker - Google Patents
Controlled anti-tripping circuit of circuit breaker Download PDFInfo
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- CN112039029A CN112039029A CN202010916930.7A CN202010916930A CN112039029A CN 112039029 A CN112039029 A CN 112039029A CN 202010916930 A CN202010916930 A CN 202010916930A CN 112039029 A CN112039029 A CN 112039029A
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- relay
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- closing
- trip
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- 238000012544 monitoring process Methods 0.000 claims abstract description 25
- 230000007246 mechanism Effects 0.000 claims description 12
- 230000002265 prevention Effects 0.000 claims 1
- 230000009471 action Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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Classifications
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- 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
- H02H7/22—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 for distribution gear, e.g. bus-bar systems; for switching devices
- H02H7/222—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 for distribution gear, e.g. bus-bar systems; for switching devices for switches
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention discloses a controlled anti-tripping circuit of a circuit breaker, which comprises a closing circuit, a tripping circuit and a relay protection anti-tripping circuit, wherein the closing circuit comprises a closing holding relay and a tripping monitoring relay, the tripping circuit comprises a tripping holding relay and a tripping monitoring relay, the front end of the relay protection anti-tripping circuit is connected with the closing circuit, the rear end of the relay protection anti-tripping circuit is connected to a closing ring of an external circuit, the closing circuit is connected with a controlled relay in series, and a normally closed contact of the controlled relay is positioned in front of the relay protection anti-tripping circuit. The problem that the anti-tripping function fails due to time competition of the auxiliary contact of the circuit breaker can be solved.
Description
Technical Field
The invention relates to the technical field of breaker opening and closing control, in particular to a controlled anti-tripping circuit of a breaker.
Background
The anti-tripping circuit is an important component of a circuit breaker opening and closing circuit, and can prevent the circuit breaker from being repeatedly opened and closed when the circuit breaker is continuously closed in a fault or a circuit breaker mechanism has a problem (the switch is stolen to trip, the mechanism is tripped), so that the service life of the circuit breaker is influenced, and even accidents occur. The tripping-proof circuit can be divided into two types, one type is a current type tripping-proof circuit existing in a microcomputer protection device, a current relay is connected in series in a tripping loop for starting, a voltage relay is connected in parallel in a closing loop, the tripping-proof circuit is self-maintained after action, and the tripping-proof circuit is locked and closed through a contact point connected in series in the closing loop to play a tripping-proof role. The other type is a voltage type anti-tripping device in the mechanism, an anti-tripping relay is connected in parallel with a closing loop, a normally open contact of a circuit breaker is connected in series with the anti-tripping loop for starting, the normally open contact is closed to realize self-holding after the anti-tripping relay acts, a normally closed contact is connected in series with the closing loop, and the closing is locked after the anti-tripping relay is disconnected to play a role in anti-tripping.
The two types of anti-tripping circuits have defects respectively, the problem that the circuit breaker jumps when the current type anti-tripping circuit cannot avoid mechanism faults is considered, the matching problem of the voltage type anti-tripping circuit and an operation loop can be solved through scheme design, and the circuit breaker is mainly used for preventing tripping by using a mechanism box from the perspective of protection equipment. However, in practical application, the parallel anti-tripping circuit of the mechanism box has the problem of time competition of auxiliary contacts of the circuit breaker, that is, a normally open contact of the circuit breaker for starting the anti-tripping relay TBJV may act slower than a normally closed contact of the circuit breaker for starting a closing circuit, the TBJV does not act in time, the closing circuit is not locked, and the anti-tripping function is disabled. The 18 major measures issued by the national network require that the action time of the anti-tripping relay is matched with the action time of the breaker, and the current voltage type anti-tripping does not meet the requirement and needs to be improved.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a controlled anti-tripping circuit of a circuit breaker.
The invention discloses a controlled anti-tripping circuit of a circuit breaker, which comprises a closing circuit, a tripping circuit and a relay protection anti-tripping circuit, wherein the closing circuit comprises a closing holding relay and a tripping monitoring relay, the tripping circuit comprises a tripping holding relay and a tripping monitoring relay, the front end of the relay protection anti-tripping circuit is connected with the closing circuit, the rear end of the relay protection anti-tripping circuit is connected to a closing ring of an external circuit, the closing circuit is connected with a controlled relay in series, and a normally closed contact of the controlled relay is positioned in front of the relay protection anti-tripping circuit.
According to one embodiment of the invention, in the closing circuit, a normally open contact of the closing holding relay is connected in series in front of the closing holding relay, the closing holding relay is closed through the contact to form voltage self-holding after acting, and the closing holding relay is connected with the relay protection tripping-preventing circuit after being connected with the controlled relay in series; one end of the jump position monitoring relay is connected to the operation positive power supply, and the other end of the jump position monitoring relay is connected with the relay protection anti-jump circuit after being connected with the normally closed contact of the breaker mechanism in series.
According to an embodiment of the present invention, the two ends of the closing holding relay are also connected in parallel with a matching resistor for setting the closing current.
According to one embodiment of the invention, in the trip circuit, a normally open contact is connected in series with the trip holding relay, and the trip holding relay is closed through the contact to form voltage self-holding after acting; one end of the on-position monitoring relay is connected to the positive operation power supply, and the other end is connected in parallel with the output terminal behind the trip holding relay.
According to an embodiment of the invention, the two ends of the tripping holding relay are also connected in parallel with a matching resistor for setting the tripping current.
According to one embodiment of the present invention, the trip hold relay and the on position monitor relay are connected in parallel and then connected to a trip coil of the external circuit.
According to one embodiment of the invention, the relay protection anti-tripping circuit comprises an anti-tripping relay and three auxiliary contacts thereof, wherein one normally open contact is connected in series before the anti-tripping relay and is connected in parallel with the normally open contact of the circuit breaker mechanism, and self-holding is realized after the anti-tripping relay acts; a pair of normally closed contacts are connected in series behind the skip position monitoring relay circuit, and the skip position monitoring relay circuit is disconnected after the anti-skip relay acts to realize the monitoring; and the other pair of normally closed contacts is connected in series before the closing ring of the external circuit, and a closing loop is disconnected after the tripping-proof relay acts, so that the circuit breaker is prevented from being closed again.
The invention has the beneficial effects that: the controlled relay FTJ is added in front of the parallel anti-tripping circuit, after the breaker is switched on, a normally open contact of the breaker in the tripping circuit is closed, TBJ acts, the FTJ is controlled to act, and a normally closed contact connected in series in a switching-on loop is opened to close the switching-on loop. After the circuit breaker trips, the normally open contact of the circuit breaker in the trip circuit is opened, TBJ returns, if there is not protection reclosing signal this moment, control FTJ time delay returns, guarantees that the normally open contact of the circuit breaker who starts the TBJV is closed, if there is closing pulse still after FTJ returns, the TBJV acts immediately and self-sustaining, in time locks the closing circuit, plays the effect of preventing jumping. Through the process, the problem that the anti-tripping function fails due to time competition of the auxiliary contact of the circuit breaker can be solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a circuit diagram of a controlled anti-trip circuit of the circuit breaker in an embodiment;
fig. 2 is an action return logic diagram of the controlled relay FTJ in the embodiment.
Description of reference numerals: 1. the circuit comprises a closing circuit, 2 a tripping circuit and 3 a relay protection tripping-preventing circuit.
Detailed Description
In the following description, for purposes of explanation, numerous implementation details are set forth in order to provide a thorough understanding of the various embodiments of the present invention. It should be understood, however, that these implementation details are not to be interpreted as limiting the invention. That is, in some embodiments of the invention, such implementation details are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.
In addition, the descriptions related to the first, the second, etc. in the present invention are only used for description purposes, do not particularly refer to an order or sequence, and do not limit the present invention, but only distinguish components or operations described in the same technical terms, and are not understood to indicate or imply relative importance or implicitly indicate the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention discloses a controlled anti-tripping circuit of a circuit breaker, which is characterized in that a circuit diagram is shown in figure 1 and comprises a closing circuit 1, a tripping circuit 2 and a relay protection anti-tripping circuit 3, wherein the closing circuit 1 comprises a closing holding relay HBJ and a tripping monitoring relay TWJ, the tripping circuit 2 comprises a tripping holding relay TBJ and a tripping monitoring relay HWJ, the front end of the relay protection anti-tripping circuit 3 is connected with the closing circuit 1, and the rear end of the relay protection anti-tripping circuit is connected with a closing ring HQ of an external circuit.
A normally open contact of the switching-on holding relay HBJ is connected in series in front of the switching-on holding relay HBJ, the switching-on holding relay HBJ is closed through the contact to form voltage self-holding after acting, and the switching-on holding relay HBJ is connected with the relay protection anti-tripping circuit 3 after being connected with the controlled relay FTJ in series; one end of the jump position monitoring relay TWJ is connected to the operation positive power supply, and the other end is connected with the relay protection anti-jump circuit 3 after being connected with the normally closed contact of the breaker mechanism in series.
And the two ends of the closing holding relay HBJ are also connected in parallel with a matching resistor for setting closing current.
The normally open contact is connected in series with the front of the tripping holding relay TBJ, and the tripping holding relay TBJ is closed through the contact to form voltage self-holding after acting; one end of the on-state monitoring relay HWJ is connected to the positive operating power supply, and the other end is connected in parallel to the output terminal behind the trip hold relay TBJ.
The trip hold relay TBJ also has a matching resistor connected across it for setting the trip current.
The trip hold relay TBJ and the engage monitor relay HWJ are connected in parallel to a trip coil TQ of the external circuit.
The relay protection anti-tripping circuit 3 comprises an anti-tripping relay TBJV and three pairs of auxiliary contacts, wherein one pair of normally open contacts are connected in series before the anti-tripping relay TBJV and are connected in parallel with the normally open contacts of the breaker mechanism, and self-holding is realized after the anti-tripping relay TBJV acts; a pair of normally closed contacts are connected in series behind the TWJ loop of the jump position monitoring relay, and the TWJ loop of the jump position monitoring relay is disconnected after the TBJV acts to realize the monitoring; and the other pair of normally closed contacts are connected in series in front of a closing ring HQ of an external circuit, and a closing loop is disconnected after the anti-tripping relay TBJV acts to prevent the circuit breaker from being closed again.
The invention relates to a controlled anti-tripping circuit of a circuit breaker, which has the working principle that: after a manual switching fault line trips, a controlled relay FTJ connected in series in a switching-on circuit 1 is subjected to software logic control by a device CPU using the circuit, the action return logic of the controlled relay FTJ is shown in FIG. 2, the state of a trip holding relay TBJ is captured by the device CPU using the circuit, when the trip holding relay TBJ acts, the controlled relay FTJ acts immediately, a normally closed contact connected in series on the switching-on circuit 1 is opened, a switching-on loop is locked, and a trip command is guaranteed to be executed preferentially; and when the breaker is tripped again after a hand is in a fault, the tripping holding relay TBJ returns, the controlled relay FTJ returns in a delayed mode, the return time can be set through the fixed value of the device, the default setting is 200ms, the remote closing pulse duration of measurement and control is avoided, and all auxiliary contacts of the breaker can be guaranteed to complete displacement. The normally closed contact of the switching-on loop is closed after the controlled relay FTJ returns, and if a switching-on signal still exists at the moment, the switching-on loop is locked by the action of the anti-tripping relay TBJV, so that the anti-tripping function is realized; if the circuit is in the condition of reclosing after tripping, a protection reclosing signal is captured by a CPU (central processing unit) of the device using the circuit after tripping, and the controlled relay FTJ cancels delay judgment and returns immediately without influencing the original protection performance.
In conclusion, the controlled relay FTJ is additionally arranged in a typical circuit with the trip-proof switching-on and switching-off function to form the controlled trip-proof circuit of the circuit breaker, the switching-on and switching-off of the controlled relay FTJ is controlled through software logic, the problem that the trip-proof function is invalid due to time competition of auxiliary contacts of the circuit breaker can be solved, and the original protection performance is not influenced.
The above description is only an embodiment of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (7)
1. The utility model provides a controlled circuit that prevents of circuit breaker, prevents trip circuit (3) including combined floodgate circuit (1), trip circuit (2) and relay protection, combined floodgate circuit (1) is including combined floodgate hold relay (HBJ) and jump position monitoring relay (TWJ), trip circuit (2) are including tripping hold relay (TBJ) and closing position monitoring relay (HWJ), relay protection prevents that trip circuit (3) front end connects combined floodgate circuit (1), and the rear end is to the joint circle (HQ) of external circuit, a characterized in that, it has concatenated a controlled relay (FTJ) on combined floodgate circuit (1), the normally closed contact of controlled relay (FTJ) is located relay protection and prevents that trip circuit (3) are preceding.
2. The controlled anti-tripping circuit of the circuit breaker according to claim 1, characterized in that in the closing circuit (1), a normally open contact of the closing holding relay (HBJ) is connected in series with the front of the closing holding relay (HBJ), the closing holding relay (HBJ) is closed through the contact to form a voltage self-holding after acting, and the closing holding relay (HBJ) is connected with the relay protection anti-tripping circuit (3) after being connected in series with the controlled relay (FTJ); one end of the jump position monitoring relay (TWJ) is connected to the operation positive power supply, and the other end of the jump position monitoring relay is connected with the relay protection anti-jump circuit (3) after being connected with a normally closed contact of the breaker mechanism in series.
3. The controlled anti-tripping circuit of a circuit breaker according to claim 2, characterized in that the closing hold relay (HBJ) is further connected in parallel across a matching resistor for setting the closing current.
4. The controlled anti-tripping circuit of the circuit breaker as claimed in claim 1, characterized in that in the tripping circuit (2), the tripping holding relay (TBJ) is connected with its normally open contact in series, and after the tripping holding relay (TBJ) acts, the contact is closed to form a voltage self-holding; one end of the closing position monitoring relay (HWJ) is connected to the positive operation power supply, and the other end is connected with the output terminal behind the tripping and holding relay (TBJ) in parallel.
5. The circuit breaker controlled anti-trip circuit of claim 4, characterized in that the trip hold relay (TBJ) further has a matching resistor connected in parallel across it for setting the trip current.
6. A circuit breaker controlled anti-trip circuit according to claim 4, characterized in that the trip hold relay (TBJ) and the on-position monitor relay (HWJ) are connected and then connected to the trip coil (TQ) of the external circuit.
7. The controlled anti-tripping circuit of the circuit breaker according to claim 1, characterized in that the relay protection anti-tripping circuit (3) comprises an anti-tripping relay (TBJV) and three pairs of auxiliary contacts, wherein one pair of normally open contacts is connected in series before the anti-tripping relay (TBJV) and is connected in parallel with the normally open contact of the circuit breaker mechanism, and the self-holding is realized after the anti-tripping relay (TBJV) is operated; a pair of normally closed contacts are connected in series behind a jump position monitoring relay (TWJ) loop, and the jump position monitoring relay (TWJ) loop is disconnected after a jump prevention relay (TBJV) acts to realize monitoring; and the other pair of normally closed contacts are connected in series before a closing ring (HQ) of an external circuit, and a switching-on loop is disconnected after a tripping-proof relay (TBJV) acts to prevent the circuit breaker from switching on again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010916930.7A CN112039029A (en) | 2020-09-03 | 2020-09-03 | Controlled anti-tripping circuit of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010916930.7A CN112039029A (en) | 2020-09-03 | 2020-09-03 | Controlled anti-tripping circuit of circuit breaker |
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| Publication Number | Publication Date |
|---|---|
| CN112039029A true CN112039029A (en) | 2020-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010916930.7A Pending CN112039029A (en) | 2020-09-03 | 2020-09-03 | Controlled anti-tripping circuit of circuit breaker |
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| CN (1) | CN112039029A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5822165A (en) * | 1996-09-16 | 1998-10-13 | Eaton Corporation | Sequence based network protector relay with forward overcurrent protection and antipumping feature |
| US20020012210A1 (en) * | 1999-12-29 | 2002-01-31 | Morris Robert A. | Circuit breaker incorporating fault lockout protection |
| CN103606902A (en) * | 2013-11-15 | 2014-02-26 | 中山市明阳电器有限公司 | Anti-tripping circuit combining breaker and relay protection |
| CN104505805A (en) * | 2014-12-16 | 2015-04-08 | 榆林学院 | Breaker operating circuit for medium voltage system |
| CN207588442U (en) * | 2017-12-01 | 2018-07-06 | 新疆特变电工自控设备有限公司 | A kind of operation control circuit of breaker |
| CN210517769U (en) * | 2019-11-06 | 2020-05-12 | 珠海思创电气有限公司 | Circuit breaker operation circuit |
| CN210536278U (en) * | 2019-09-30 | 2020-05-15 | 辽宁华冶集团发展有限公司 | 'double-anti-jumping' protection circuit |
-
2020
- 2020-09-03 CN CN202010916930.7A patent/CN112039029A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5822165A (en) * | 1996-09-16 | 1998-10-13 | Eaton Corporation | Sequence based network protector relay with forward overcurrent protection and antipumping feature |
| US20020012210A1 (en) * | 1999-12-29 | 2002-01-31 | Morris Robert A. | Circuit breaker incorporating fault lockout protection |
| CN103606902A (en) * | 2013-11-15 | 2014-02-26 | 中山市明阳电器有限公司 | Anti-tripping circuit combining breaker and relay protection |
| CN104505805A (en) * | 2014-12-16 | 2015-04-08 | 榆林学院 | Breaker operating circuit for medium voltage system |
| CN207588442U (en) * | 2017-12-01 | 2018-07-06 | 新疆特变电工自控设备有限公司 | A kind of operation control circuit of breaker |
| CN210536278U (en) * | 2019-09-30 | 2020-05-15 | 辽宁华冶集团发展有限公司 | 'double-anti-jumping' protection circuit |
| CN210517769U (en) * | 2019-11-06 | 2020-05-12 | 珠海思创电气有限公司 | Circuit breaker operation circuit |
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Application publication date: 20201204 |