CN220066877U - Tripping and closing protection circuit of circuit breaker - Google Patents
Tripping and closing protection circuit of circuit breaker Download PDFInfo
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- CN220066877U CN220066877U CN202321451280.9U CN202321451280U CN220066877U CN 220066877 U CN220066877 U CN 220066877U CN 202321451280 U CN202321451280 U CN 202321451280U CN 220066877 U CN220066877 U CN 220066877U
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- 238000012544 monitoring process Methods 0.000 claims abstract description 21
- 230000002265 prevention Effects 0.000 claims abstract description 16
- 208000015698 cervical squamous intraepithelial neoplasia Diseases 0.000 claims description 9
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical group [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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Abstract
The utility model discloses a tripping and closing protection circuit of a circuit breaker, which comprises: the protection closing end CIN is sequentially connected with a coil of the trip prevention loop relay TBJV, a first normally open contact of the trip holding relay TBJ, a resistor R2 and a control bus negative electrode-KM to form the trip prevention loop; the normally open contact of the anti-tripping loop relay TBJV is connected in parallel with the first normally open contact end of the tripping hold relay TBJ and is used for anti-tripping self-holding; the positive electrode +KM of the control bus is sequentially connected with a second normally open contact of the tripping hold relay TBJ, a coil of the tripping hold relay TBJ, a tripping coil TQ and a negative electrode-KM of the control bus to form the tripping self-protection loop; the positive pole +KM of the control bus is sequentially connected with a normally open contact of the switching-on holding relay HBJ, a coil of the switching-on holding relay HBJ, a normally closed contact of the tripping prevention loop relay TBJV, a tripping prevention end of a switching-on coil HQ belt and a negative pole-KM of the control bus to form the switching-on self-holding loop. The tripping and closing protection can be realized, and the loop monitoring and early warning can be realized.
Description
Technical Field
The utility model relates to the technical field of tripping and closing protection circuits, in particular to a tripping and closing protection circuit of a circuit breaker.
Background
Many circuit breakers used for opening and closing in a power system have a tripping-free closing protection function. Under the condition that the external switch of the circuit breaker has faults such as adhesion, the circuit breaker is prevented from being damaged due to repeated continuous opening and closing actions, and therefore a tripping and closing protection circuit is needed to be additionally arranged outside. The current tripping and closing protection circuit mostly adopts a plurality of diodes to step down, the relay is connected in parallel to enable the tripping and closing protection circuit to work, the voltage drop (about 5V) is large, the voltage sent to the opening and closing coil of the circuit breaker is possibly caused to be too low in a loop, the opening and closing are possibly caused to be incapable of acting or not act in place, and the circuit breaker is caused to be faulty. Meanwhile, the existing tripping and closing protection circuit has no monitoring and early warning function, and cannot timely indicate tripping and closing states.
Disclosure of Invention
Aiming at the technical problem of tripping protection of the current breaker, the utility model designs a tripping and closing protection circuit of the breaker.
The utility model provides a tripping and closing protection circuit of a circuit breaker, which comprises: trip-proof loop, trip self-holding loop and closing self-holding loop;
the protection closing end CIN is sequentially connected with a coil of the trip prevention loop relay TBJV, a first normally open contact of the trip holding relay TBJ, a resistor R2 and a control bus negative electrode-KM to form the trip prevention loop; wherein the trip hold relay TBJ is for enabling and disabling a trip hold function; the normally open contact of the anti-tripping loop relay TBJV is connected in parallel with the first normally open contact end of the tripping hold relay TBJ and is used for anti-tripping self-holding;
the positive electrode +KM of the control bus is sequentially connected with a second normally open contact of the tripping hold relay TBJ, a coil of the tripping hold relay TBJ, a tripping coil TQ and a negative electrode-KM of the control bus to form the tripping self-protection loop;
the positive pole +KM of the control bus is sequentially connected with a normally open contact of the switching-on holding relay HBJ, a coil of the switching-on holding relay HBJ, a normally closed contact of the anti-tripping relay TBJV, a tripping prevention end of a switching-on coil HQ belt and a negative pole-KM of the control bus to form the switching-on self-protecting loop; the normally closed contact of the anti-tripping loop relay TBJV acts to cut off the closing loop, so that the circuit breaker is prevented from tripping for a plurality of times.
Further, the normally open contact of the closing holding relay HBJ is sequentially connected to a protection closing end CIN, a diode D1, and a hand closing/remote closing end CINs, and is configured to receive a protection closing signal, a hand closing signal, and a remote control closing signal.
Further, the second normally open contact end of the trip hold relay TBJ is sequentially connected to the protection trip end TIN, the diode D2, and the hand/remote trip end TINs, and is configured to receive a protection trip signal, a manual trip signal, and a remote trip signal.
Further, the trip holding relay TBJ and the closing holding relay HBJ are both low-voltage-driven current-type relays.
Further, the method comprises the steps of: a position relay KKJ after closing;
one end of a coil of the position relay KKJ after closing is respectively connected to a hand closing/remote closing end CINS and a hand separating/remote separating end TINS, and the other end of the coil is respectively connected to a control bus negative electrode-KM through a resistor R3 and a resistor R4;
and the normally open contact of the position relay KKJ is connected to the terminal KK1 and the terminal KK2 and used for indicating restarting or locking reclosing and spare power automatic switching.
Further, the method comprises the steps of: a trip position monitoring circuit;
the positive pole +KM of the control bus is sequentially connected with a resistor R1, a coil of a tripping position relay TWJ, a closing coil HQ and a negative pole-KM of the control bus to form a tripping position monitoring loop, and the tripping position monitoring loop is used for acquiring a closing signal HZXQ;
the first normally open contact end of the trip position relay TWJ is connected to the terminal TWK and the terminal TWC, respectively, for indicating a trip state.
Further, the method comprises the steps of: a closing position monitoring loop;
the positive pole +KM of the control bus is sequentially connected with a resistor R5, a coil of a switching-on position relay HWJ, a tripping coil TQ and a negative pole-KM of the control bus to form a switching-on position monitoring loop, and the switching-on position monitoring loop is used for acquiring a tripping signal TZXQ;
the first normally open contact end of the closing position relay HWJ is connected to the terminal HWK and the terminal HWC, respectively, for indicating the closing state.
Further, one end of the second normally closed contact of the trip position relay TWJ is connected with the terminal TWB, the other end of the second normally closed contact of the trip position relay TWJ is connected with one end of the second normally closed contact of the closing position relay HWJ, and the other end of the second normally closed contact of the closing position relay HWJ is connected with the terminal HWB, so as to form a control loop disconnection warning for indicating a signal when the trip loop or the closing loop fails to be disconnected.
The utility model has the following advantages:
the trip-proof relay TBJ and the trip-proof relay TBJV are adopted to form a trip-proof loop of the circuit breaker, and trip self-holding is formed when the circuit breaker trips; and the closing loop is cut off, so that the breaker is prevented from tripping and closing for a plurality of times. The tripping hold relay TBJ and the closing hold relay HBJ adopt low-voltage driven current type relays, so that the voltage drop of the tripping hold relay TBJ and the closing hold relay HBJ on the tripping-preventing closing loop and the self-holding loop is lower (the voltage drop amplitude is 1.5V at maximum), and more voltage is prevented from being separated.
And secondly, a voltage path for keeping tripping and closing of the switching-on maintaining relay HBJ and the tripping and closing maintaining relay TBJ is arranged, so that the tripping and closing coil of the circuit breaker can be disconnected after reliable action.
And thirdly, monitoring the tripping and closing state of the loop through a tripping position relay TWJ and a closing position relay HWJ, and indicating the tripping state and the closing state. A control loop disconnection warning may also be implemented through trip position relay TWJ and closing position relay HWJ for signals indicating a fault disconnection of the trip or closing circuit.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a trip protection circuit diagram in the present utility model.
Detailed Description
The utility model is described in further detail below with reference to the drawings and examples. It is specifically noted that the following examples are only for illustrating the present utility model, but do not limit the scope of the present utility model. Likewise, the following examples are only some, but not all, of the examples of the present utility model, and all other examples, which a person of ordinary skill in the art would obtain without making any inventive effort, are within the scope of the present utility model.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
As shown in fig. 1, the present utility model provides a trip and closing protection circuit of a circuit breaker, comprising: the tripping protection circuit comprises an tripping protection circuit, a tripping position relay KKJ, a tripping position monitoring circuit and a closing monitoring circuit;
and (3) a jump-proof loop:
as shown in fig. 1, a protection closing end CIN is sequentially connected with a coil of a trip prevention loop relay TBJV, a first normally open contact of a trip holding relay TBJ, a resistor R2 and a control bus negative electrode-KM to form the trip prevention loop; wherein the trip hold relay TBJ is for enabling and disabling a trip hold function;
the normally open contact of the anti-tripping loop relay TBJV is connected in parallel with the first normally open contact end of the tripping hold relay TBJ and is used for anti-tripping self-holding;
in the present embodiment, the trip prevention function of the trip prevention circuit is realized by the trip hold relay TBJ and the trip prevention circuit relay TBJV together. When the protection closing terminal CIN trips or is manually tripped, the trip hold relay TBJ is operated, and the normally open contact of the trip hold relay TBJ connected to the coil of the trip prevention loop relay TBJV is closed while the trip hold loop is started. If the switching-on (manual switching-on or remote switching-on) operation is performed at this time, the coil of the anti-tripping relay TBJV is electrified, and the normally open contact of the anti-tripping relay TBJV connected in series with the coil of the anti-tripping relay TBJV is closed, so that a self-holding loop in the anti-tripping loop is formed, and the tripping state is maintained.
Closing self-holding loop:
as shown in fig. 1, a positive electrode +km of a control bus is sequentially connected with a normally open contact of a closing holding relay HBJ, a coil of the closing holding relay HBJ, a normally closed contact of an anti-tripping relay TBJV, an anti-tripping end of a closing coil HQ belt and a negative electrode-KM of the control bus to form the closing self-holding loop; the normally closed contact of the anti-tripping loop relay TBJV acts to cut off the closing loop, so that the circuit breaker is prevented from tripping for a plurality of times.
The normally open contact of the closing holding relay HBJ is sequentially connected with a protection closing end CIN, a diode D1 and a hand closing/remote closing end CINS and is used for receiving a protection closing signal, a hand closing signal and a remote control closing signal.
Trip self-holding loop:
as shown in fig. 1, the positive electrode +km of the control bus is sequentially connected with the second normally open contact of the trip hold relay TBJ, the coil of the trip hold relay TBJ, the trip coil TQ and the negative electrode-KM of the control bus to form the trip self-hold loop;
the second normally open contact end of the trip hold relay TBJ is sequentially connected with a protection trip end TIN, a diode D2 and a hand-on/remote-off end TINs, and is used for receiving a protection trip signal, a manual switching-off signal and a remote control trip signal.
In the present embodiment, the self-hold circuit is realized by the trip hold relay TBJ and the closing hold relay HBJ. The purpose is that when the time of manual switching-on/remote control switching-on or protection tripping is too short, in order to ensure that the tripping holding coil TBJ and the switching-on holding coil HBJ of the circuit breaker can reliably act, the tripping holding relay TBJ and the switching-on protection relay HBJ can automatically hold the voltage path of the tripping switching-on after the contact ends act, so that the coil of the tripping holding coil TBJ and the coil of the switching-on holding coil HBJ of the circuit breaker can be disconnected after the reliable action. The tripping hold relay TBJ and the closing hold relay HBJ adopt low-voltage driven current type relays, and the voltage division on the loop is low, so that the tripping and closing coil of the circuit breaker can reliably act.
Post-closing position relay KKJ:
as shown in fig. 1, one end of a coil of the position relay KKJ is connected to a hand-on/remote-off terminal CINS and a hand-on/remote-off terminal TINS respectively, and the other end is connected to a control bus negative electrode-KM respectively through a resistor R3 and a resistor R4;
the normally open contact of the position relay KKJ after closing is connected to the terminal KK1 and the terminal KK2 and is used for indicating restarting or locking reclosing and spare power automatic switching;
and the after-closing position relay KKJ is a double-position magnetic latching relay.
In this embodiment, when the circuit breaker is manually or remotely switched on, the on-off position relay KKJ acts and remains; when the breaker is manually opened or tripped by remote control, the on-off position relay KKJ is reset to be opened; when the circuit breaker is tripped due to the protective action, the on-off position relay KKJ does not return to the off state. The position signal is mainly used for indicating restarting or locking reclosing and spare power automatic switching.
Trip position monitoring circuit:
as shown in fig. 1, a control bus positive electrode +km is sequentially connected with a resistor R1, a coil of a tripping position relay TWJ, a switching-on coil HQ and a control bus negative electrode-KM to form a tripping position monitoring loop, and is used for acquiring a switching-on signal HZXQ;
the first normally open contact end of the trip position relay TWJ is connected to the terminal TWK and the terminal TWC, respectively, for indicating a trip state.
In this embodiment, the trip position relay TWJ is used to monitor the trip status of the circuit breaker. When the circuit breaker is in a trip (after tripping), the terminal TWK and the terminal TWC are in a conductive state, i.e. a trip state is indicated. After the circuit breaker trips, the auxiliary group switch contacts in front of the trip coil TQ of the circuit breaker are opened, and the contacts of the closing coil are closed, so that the trip position relay TWJ can be electrically operated only by engaging the closing coil HQ. The connection relationship of the closing position relay HWJ is the same.
Closing position monitoring circuit:
as shown in fig. 1, the positive electrode +km of the control bus is sequentially connected with a resistor R5, a coil of a switching-on position relay HWJ, a tripping coil TQ and a negative electrode-KM of the control bus to form a switching-on position monitoring loop, so as to obtain a tripping signal TZXQ;
the first normally open contact end of the closing position relay HWJ is connected to the terminal HWK and the terminal HWC, respectively, for indicating the closing state.
In the present embodiment, the closing position relay HWJ is used to monitor the closing state of the circuit breaker. When the circuit breaker is in the closed position (after closing), the terminal HWK and the terminal HWC are in a conducting state, i.e. the closed position is indicated.
One end of the second normally-closed contact of the trip position relay TWJ is connected with the terminal TWB, the other end of the second normally-closed contact of the trip position relay TWJ is connected with one end of the second normally-closed contact of the closing position relay HWJ, and the other end of the second normally-closed contact of the closing position relay HWJ is connected with the terminal HWB to form a control loop disconnection warning for indicating a signal when the trip loop or the closing loop is disconnected by faults.
In this embodiment, the control loop disconnection warning is implemented by the trip position relay TWJ and the closing position relay HWJ. When the tripping coil TQ and the closing coil HQ are failed or disconnected, namely the tripping signal TZXQ and the closing signal HZXQ are disconnected at the same time, the terminal TWB and the terminal HWB are in a conducting state, namely a disconnection warning signal is output. A signal for indicating when a trip circuit or a closing circuit fails to open.
The foregoing description is only a partial embodiment of the present utility model, and is not intended to limit the scope of the present utility model, and all equivalent devices or equivalent processes using the descriptions and the drawings of the present utility model or directly or indirectly applied to other related technical fields are included in the scope of the present utility model.
Claims (8)
1. A trip closing protection circuit of a circuit breaker, comprising: trip-proof loop, trip self-holding loop and closing self-holding loop;
the protection closing end CIN is sequentially connected with a coil of the trip prevention loop relay TBJV, a first normally open contact of the trip holding relay TBJ, a resistor R2 and a control bus negative electrode-KM to form the trip prevention loop; wherein the trip hold relay TBJ is for enabling and disabling a trip hold function; the normally open contact of the anti-tripping loop relay TBJV is connected in parallel with the first normally open contact end of the tripping hold relay TBJ and is used for anti-tripping self-holding;
the positive electrode +KM of the control bus is sequentially connected with a second normally open contact of the tripping hold relay TBJ, a coil of the tripping hold relay TBJ, a tripping coil TQ and a negative electrode-KM of the control bus to form the tripping self-protection loop;
the positive pole +KM of the control bus is sequentially connected with a normally open contact of the switching-on holding relay HBJ, a coil of the switching-on holding relay HBJ, a normally closed contact of the anti-tripping relay TBJV, a tripping prevention end of a switching-on coil HQ belt and a negative pole-KM of the control bus to form the switching-on self-protecting loop; the normally closed contact of the anti-tripping loop relay TBJV acts to cut off the closing loop, so that the circuit breaker is prevented from tripping for a plurality of times.
2. The trip closing protection circuit of the circuit breaker according to claim 1, wherein the normally open contact of the closing holding relay HBJ is sequentially connected to a protection closing terminal CIN, a diode D1, a hand-on/remote-off terminal CINs for receiving a protection closing signal, a hand-on signal, and a remote-control closing signal.
3. The trip closing protection circuit of the circuit breaker of claim 1, wherein the second normally open contact terminal of the trip hold relay TBJ is sequentially connected to a protection trip terminal TIN, a diode D2, a hand-on/off trip terminal TINs for receiving a protection trip signal, a manual trip signal, a remote trip signal.
4. The circuit according to claim 1, wherein the trip hold relay TBJ and the closing hold relay HBJ are low-voltage-driven current type relays.
5. The trip closing protection circuit of the circuit breaker of claim 1, comprising: a position relay KKJ after closing;
one end of a coil of the position relay KKJ after closing is respectively connected to a hand closing/remote closing end CINS and a hand separating/remote separating end TINS, and the other end of the coil is respectively connected to a control bus negative electrode-KM through a resistor R3 and a resistor R4;
and the normally open contact of the position relay KKJ is connected to the terminal KK1 and the terminal KK2 and used for indicating restarting or locking reclosing and spare power automatic switching.
6. The trip closing protection circuit of the circuit breaker of claim 1, comprising: a trip position monitoring circuit;
the positive pole +KM of the control bus is sequentially connected with a resistor R1, a coil of a tripping position relay TWJ, a closing coil HQ and a negative pole-KM of the control bus to form a tripping position monitoring loop, and the tripping position monitoring loop is used for acquiring a closing signal HZXQ;
the first normally open contact end of the trip position relay TWJ is connected to the terminal TWK and the terminal TWC, respectively, for indicating a trip state.
7. The trip closing protection circuit of the circuit breaker of claim 1, comprising: a closing position monitoring loop;
the positive pole +KM of the control bus is sequentially connected with a resistor R5, a coil of a switching-on position relay HWJ, a tripping coil TQ and a negative pole-KM of the control bus to form a switching-on position monitoring loop, and the switching-on position monitoring loop is used for acquiring a tripping signal TZXQ;
the first normally open contact end of the closing position relay HWJ is connected to the terminal HWK and the terminal HWC, respectively, for indicating the closing state.
8. The trip closing protection circuit of the circuit breaker of claim 7, wherein one end of the second normally closed contact of the trip position relay TWJ is connected to the terminal TWB, the other end of the second normally closed contact of the trip position relay TWJ is connected to one end of the second normally closed contact of the closing position relay HWJ, and the other end of the second normally closed contact of the closing position relay HWJ is connected to the terminal HWB to form a control loop open warning for indicating a signal when the trip loop or the closing loop is broken.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321451280.9U CN220066877U (en) | 2023-06-08 | 2023-06-08 | Tripping and closing protection circuit of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321451280.9U CN220066877U (en) | 2023-06-08 | 2023-06-08 | Tripping and closing protection circuit of circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220066877U true CN220066877U (en) | 2023-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321451280.9U Active CN220066877U (en) | 2023-06-08 | 2023-06-08 | Tripping and closing protection circuit of circuit breaker |
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| Country | Link |
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| CN (1) | CN220066877U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117578743A (en) * | 2024-01-17 | 2024-02-20 | 仟亿达集团股份有限公司 | Frame circuit breaker trip circuit monitoring system and method |
-
2023
- 2023-06-08 CN CN202321451280.9U patent/CN220066877U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117578743A (en) * | 2024-01-17 | 2024-02-20 | 仟亿达集团股份有限公司 | Frame circuit breaker trip circuit monitoring system and method |
| CN117578743B (en) * | 2024-01-17 | 2024-04-16 | 仟亿达集团股份有限公司 | Frame circuit breaker trip circuit monitoring system and method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A circuit breaker tripping and closing protection circuit Granted publication date: 20231121 Pledgee: Industrial Bank Limited by Share Ltd. Xiamen branch Pledgor: XIAMEN GREATER ELECTRIC AUTOMATION Co.,Ltd. Registration number: Y2024110000269 |