CN211629870U - Circuit breaker anti-tripping circuit - Google Patents
Circuit breaker anti-tripping circuit Download PDFInfo
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- CN211629870U CN211629870U CN202020360352.9U CN202020360352U CN211629870U CN 211629870 U CN211629870 U CN 211629870U CN 202020360352 U CN202020360352 U CN 202020360352U CN 211629870 U CN211629870 U CN 211629870U
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Abstract
The utility model discloses a circuit breaker anti-tripping circuit, which comprises a hand-closing branch, a remote-closing branch, an anti-tripping branch and an anti-tripping control branch, wherein the hand-closing branch is used for switching on a manually operated circuit breaker; the remote switching-on branch is used for switching on a remote control operation circuit breaker; the anti-jumping branch is used for cutting off the hand-closing branch and the remote-closing branch; and the anti-jump control branch is used for controlling whether the anti-jump branch acts or not. The utility model discloses a circuit is prevented jumping by circuit breaker when carrying out combined floodgate operation, if close floodgate to fault line or equipment just, and simultaneously the hand of combined floodgate control circuit closes or the distant trouble such as adhesion takes place again of contact, prevents jumping the accuse circuit through the circuit breaker, can prevent "circuit breaker jump" trouble, reaches the purpose that the circuit breaker prevented jumping, ensures circuit breaker normal operating and close floodgate reliably.
Description
Technical Field
The utility model relates to a circuit breaker divide-shut brake control technical field especially relates to a circuit breaker prevents circuit that jumps.
Background
The high-voltage circuit breaker is used as important electrical equipment in a power system, and the normal operation of the circuit breaker and the normal opening and closing operation are very important. Under some circumstances, when the high-voltage circuit breaker is switched on, if the high-voltage circuit breaker is just switched on a fault line and equipment, and due to the reasons of switching-on of a switching-on control loop or adhesion of a remote switching-on joint and the like, after the high-voltage circuit breaker is tripped by a relay protection device, the circuit breaker can be switched on again and tripped again for many times, namely, the phenomenon of 'circuit breaker jumping' is commonly known. In case of a circuit breaker jump failure, the high-voltage circuit breaker can be damaged, and even an explosion accident can occur, so that the stable operation of the whole power system is endangered.
In order to avoid the occurrence of a circuit breaker jump fault, at present, a common circuit breaker manufacturer designs an anti-jump loop in a circuit breaker mechanism, a protection manufacturer also designs the anti-jump loop on a protection device, the two loops have parameter mismatching at the same time, the circuit breaker can cause reclosing to be uncharged at the switching-on position, and a jump monitoring lamp and a closing monitoring lamp are simultaneously on; when a circuit has an instantaneous fault, the protection device normally trips to cut off the fault circuit, and when a circuit breaker reclosing function is switched in, the reclosing can be refused, so that the circuit breaker cannot be reclosed, and the problems of misjudgment and the like are caused to operation and maintenance personnel; in addition, in some anti-tripping loops, because the auxiliary contacts of the circuit breakers of the tripping loops are improperly adjusted (the deflection is too slow), the contacts at the protective outlet are firstly broken to cause the burning-out fault. Therefore, the anti-jumping circuit of the circuit breaker is developed, jumping faults of the circuit breaker are avoided, and normal and reliable operation of the circuit breaker is ensured to be very urgent.
SUMMERY OF THE UTILITY MODEL
For the technical problem who exists among the above-mentioned prior art of solution, the utility model provides a circuit is prevented jumping by circuit breaker.
The specific technical scheme is as follows:
the anti-tripping circuit of the circuit breaker comprises a hand-in branch, a remote-in branch, an anti-tripping branch and an anti-tripping control branch, wherein the hand-in branch is used for manually operating the circuit breaker to switch on; the remote switching-on branch is used for switching on a remote control operation circuit breaker; the anti-jumping branch is used for cutting off the hand-closing branch and the remote-closing branch; and the anti-jump control branch is used for controlling whether the anti-jump branch acts or not.
In one possible design, the circuit includes: the switching-on/off switching-off device comprises a switching-on/off transfer switch, an anti-tripping relay, a switching-on maintaining relay, a switching-on coil and a direct-current power supply; the anti-tripping relay is a double-coil relay, the current coil has a starting function, and the voltage coil has a self-holding function; the hand is closed the branch road and is included: one end of a first group of normally open contacts of the switching-on and switching-off transfer switch is connected with the anode of the direct-current power supply, the other end of the first group of normally open contacts of the switching-on and switching-off transfer switch is connected with one end of a voltage normally closed contact of the tripping-prevention relay, the other end of the voltage normally closed contact of the tripping-prevention relay is connected with one end of a coil of the switching-on holding relay, and the other end of the coil of the switching-on holding relay is connected with.
In one possible design, the remote engaging leg includes: one end of a second group of normally open contacts of the switching-on and switching-off transfer switch is connected with the anode of the direct-current power supply, the other end of the second group of normally open contacts of the switching-on and switching-off transfer switch is connected with one end of the normally open contacts of the remote control switching-on and switching-off holding relay, and the other end of the normally open contacts of the remote control switching-on and switching-off holding relay is connected with one end.
In one possible design, the anti-bounce leg comprises: one end of the anti-tripping relay voltage coil is connected with the other end of the first group of normally open contacts of the change-over switch; the other end of the voltage coil of the anti-tripping relay is connected with a common end of the current normally open contact of the anti-tripping relay and the voltage self-holding contact of the anti-tripping relay, and the other common end of the current normally open contact of the anti-tripping relay and the other common end of the voltage self-holding contact of the anti-tripping relay are used as the other end of the anti-tripping branch and connected with the negative electrode of the direct-current power supply.
In one possible design, the anti-bounce control leg includes: one end of a current coil of the anti-tripping relay is connected with a common end of a current self-holding contact of the anti-tripping relay and a normally open contact of the protective tripping outlet relay, and the current self-holding contact of the anti-tripping relay and the other common end of the normally open contact of the protective tripping outlet relay are connected with the anode of the direct-current power supply; the other end of the current coil of the anti-tripping relay is connected with one end of an auxiliary normally open contact of the circuit breaker, and the other end of the auxiliary normally open contact of the circuit breaker is connected with the negative electrode of the direct-current power supply through a brake separating coil.
In one possible design, the voltage of the dc power supply is 220V.
In one possible design, the circuit further includes a breaker auxiliary normally closed contact connected in series between the closing hold relay coil and the closing coil.
In one possible embodiment, the latching contacts of the closing hold relay are connected in parallel to the first group of normally open contacts of the switching-on/switching-off changeover switch.
In one possible design, the normally open contact of the protection tripping outlet relay is connected in series with the protection tripping pressure plate and then connected in parallel with the current self-holding contact of the anti-tripping relay.
The utility model discloses technical scheme's main advantage as follows:
the utility model discloses a circuit breaker anti-tripping circuit, when the circuit breaker carries out the combined floodgate operation, if close to fault line or equipment just, then the contact KT of protection tripping operation outlet relay is closed, anti-tripping relay's current coil KLT.A starts, when the circuit breaker tripping operation, anti-tripping relay's electric current normally open contact KLT.A2 is closed, the branch road of preventing jumping has been put through, anti-tripping relay's voltage coil KLT.V is electrified, this branch road's anti-tripping relay's voltage self-sustaining contact KLT.V2 self-sustaining, anti-tripping relay's normally closed contact KLT.V1 disconnection concatenating with combined floodgate coil HQ, the control circuit of closing has been cut off. If the hand-on contact points (first and second) of the switching-on/off changeover switch QK or the remote-on contact point KRC is not opened due to adhesion and the like, a switching-on command is continuously sent out, and the circuit breaker cannot be switched on because a switching-on control loop is disconnected, so that the purpose of preventing the circuit breaker from jumping is achieved. In addition, after the current coil KLT.A of the anti-tripping relay is started, the self-holding contact KLT.A1 is closed until the normally-open auxiliary contact QF2 of the breaker is forced to shift, so that the phenomenon that the outlet contact is protected from arc breakage firstly and then the fault is burnt is effectively prevented. The normal operation of the circuit breaker and reliable closing are ensured.
Drawings
The accompanying drawings, which are set forth herein, serve to provide a further understanding of the embodiments of the present invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are illustrative of the invention and do not constitute a limitation on the invention. In the drawings:
fig. 1 is a circuit diagram of an anti-trip circuit of a circuit breaker according to an embodiment of the present invention.
Detailed Description
To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
The technical solution provided by the embodiments of the present invention is described in detail below with reference to the accompanying drawings.
The embodiment of the utility model provides a circuit is prevented jumping by circuit breaker, as shown in figure 1, this circuit includes: the switching-on/off switching device comprises a switching-on/off changeover switch QK, an anti-tripping relay KLT, a switching-on maintaining relay KLC, a switching-on coil HQ and a direct-current power supply KM;
one end of a first group of normally open contacts (first and second) of the switching-on and switching-off changeover switch is connected with the positive electrode of the direct-current power supply, the other end of the first group of normally open contacts is connected with one end of a voltage normally closed contact (KLT.V1) of the anti-tripping relay, the other end of the voltage normally closed contact (KLT.V1) of the anti-tripping relay is connected with one end of a coil (KLC) of the switching-on holding relay, and the other end of the coil (KLC) of the switching-on holding relay is; the partial components form a hand-closing branch.
One end of a second group of normally open contacts of the switching-on and switching-off transfer switch is connected with the positive electrode of the direct current power supply, the other end of the second group of normally open contacts of the switching-on and switching-off transfer switch is connected with one end of a normally open contact KRC of the remote control switching-on and switching-off holding relay, and the other end of the normally open contact KRC of the remote control switching-on and switching-off holding relay is connected with one end of a normally closed voltage contact; the partial components form a remote-joint branch.
One end of a voltage coil KLT.V of the anti-tripping relay is connected with one ends of a first group of normally open contacts I and II of the transfer switch; the other end of a voltage coil KLT.V of the anti-tripping relay is connected with a common end of a current normally-open contact KLT.A2 of the anti-tripping relay and a voltage self-holding contact KLT.V2 of the anti-tripping relay, and the other common end of the current normally-open contact KLT.A2 of the anti-tripping relay and the other common end of the voltage self-holding contact KLT.V2 of the anti-tripping relay is used as the other end of the anti-tripping branch to be connected with the negative electrode of the direct-current power supply; the part constitutes an anti-jump branch.
One end of a current coil KLT.A of the anti-tripping relay is connected with a current self-holding contact KLT.A1 of the anti-tripping relay and a public end of a normally-open contact KT of the protection tripping outlet relay, the current self-holding contact KLT.A1 of the anti-tripping relay and the other public end of the normally-open contact KT of the protection tripping outlet relay are connected with the positive electrode of a direct-current power supply, the other end of the current coil KLT.A of the anti-tripping relay is connected with one end of an auxiliary normally-open contact QF2 for breaking, and the other end of the auxiliary normally-open contact QF2 of the breaker is connected with the negative electrode of the direct-current power. The part of the components forms an anti-trip control branch for switching on the anti-trip branch in the event of a fault.
The switching-on operation of the circuit breaker comprises a switching-on operation mode and a switching-off operation mode, and is completed through a switching-on branch and a switching-off branch respectively.
When the circuit breaker is manually operated to be switched on, the change-over switch QK is rotated to a switch-on position, the first group of normally open contacts are closed, the relay coil KLC and the switch-on coil HQ are connected with the direct-current power supply through the voltage normally closed contact KLT.V1 of the anti-tripping relay, and the switch-on coil HQ is electrified, so that the circuit breaker primary operation mechanism is driven, and the switch-on of the circuit breaker is completed.
When the remote control is switched on, the change-over switch QK is rotated to a remote control position, the normally open contact of the second group is closed, and when the remote control is performed on the background monitoring machine, the normally open contact KRC of the remote control switch-on maintaining relay is closed, so that the switch-on coil HQ is electrified, the primary operation mechanism of the circuit breaker is driven, and the switch-on of the circuit breaker is completed.
The hand-closing branch and the remote-closing branch directly control whether the breaker is closed or not, and the hand-closing branch and the remote-closing branch are collectively called a closing control loop.
To sum up, the anti-tripping circuit of the circuit breaker provided by the embodiment of the utility model has the advantages that when the circuit breaker is switched on, if just switched on a fault line or equipment, the contact KT of the trip protection outlet relay is closed, the current coil KLT.A of the anti-tripping relay is started, the trip coil TQ is electrified, and the circuit breaker completes tripping; meanwhile, a current normally-open contact KLT.A2 of the anti-tripping relay is closed, an anti-tripping branch is connected, a voltage coil KLT.V of the anti-tripping relay of the branch is electrified, a voltage self-holding contact KLT.V2 of the anti-tripping relay of the branch is self-held, a normally-closed contact KLT.V1 of the anti-tripping relay connected with a closing coil HQ in series is disconnected, and a closing control loop is cut off. If the manual on-off contact points (first and second) of the on-off switch QK or the remote on-off contact point KRC are disconnected due to adhesion and the like, a closing command is continuously sent, and the circuit breaker cannot be closed due to the fact that the closing control loop is disconnected, so that the purpose of preventing the circuit breaker from jumping is achieved. In addition, after the current coil KLT.A of the anti-tripping relay is started, the self-holding contact KLT.A1 is closed until the normally-open auxiliary contact QF2 of the breaker is forced to shift, so that the phenomenon that the outlet contact is protected from arc breakage firstly and then the fault is burnt is effectively prevented. The normal operation of the circuit breaker and reliable closing are ensured.
When the circuit breaker is in a closing operation state, an auxiliary normally open contact QF2 of the circuit breaker is closed, and when a short-circuit fault occurs on a line load side, secondary current from a current transformer is converted into a weak current signal suitable for being collected by a computer through a current converter by microcomputer protection, and then the collection, calculation and output of the secondary protection current are sequentially completed through a CPU unit through filtering and A/D (analog to digital) conversion. And sending an execution command to a corresponding relay, finally protecting the action of the outlet relay, closing a contact KT of the tripping outlet relay, switching on a tripping loop of the circuit breaker, starting a current coil KLT.A of the anti-tripping relay, and self-maintaining a current normally-open contact KLT.A2 of the anti-tripping relay while the TQ is electrified to act. It should be noted that, the current coil klt.a of the trip-proof relay is also the coil of the circuit breaker trip holding relay, and is located in the microcomputer protection measurement and control device.
Further, the embodiment of the utility model provides a circuit is prevented jumping by circuit breaker is still including establishing ties the supplementary normally closed contact QF1 of circuit breaker between combined floodgate holding relay coil KLC and the combined floodgate coil HQ. Through setting up the supplementary normally closed contact QF1 of circuit breaker, after the circuit breaker closing, come the circuit breaker control circuit that closes a floodgate, make circuit breaker closing coil HQ lose the electricity, prevent that the coil from getting electricity for a long time and being burnt out.
Further, in the anti-tripping circuit of the circuit breaker provided by the embodiment of the present invention, the self-holding contact KLC1 of the closing holding relay is connected in parallel with the first group of normally open contacts of the switching-on/off change-over switch. When a circuit breaker closing control loop is connected, a closing holding relay coil KLC and a closing coil HQ are electrified, meanwhile, a self-holding contact KLC1 of a closing holding relay is closed, and the situation that the contact I and the contact II of a QK or the pulse contact of a KRC return too fast to possibly cause the failure of the correct action of the closing coil and the resulting unsuccessful closing is prevented.
Due to the maintenance of the circuit breaker and the requirement of the verification of relay protection, a protective tripping pressure plate LP1 is also connected in series in the protective tripping circuit of the circuit breaker. In the circuit, a normally open contact KT of a protection tripping outlet relay is connected in series with a protection tripping pressure plate LP1 and then is connected in parallel with a current self-holding contact KLT.A1 of an anti-tripping relay.
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 embodiments are only used for illustrating the technical solution 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 should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (9)
1. The anti-tripping circuit of the circuit breaker is characterized by comprising a hand-in branch, a remote-in branch, an anti-tripping branch and an anti-tripping control branch;
the manual switching branch is used for switching on a manually operated circuit breaker;
the remote switching-on branch is used for switching on a remote control operation circuit breaker;
the anti-jumping branch is used for cutting off the hand-closing branch and the remote-closing branch;
and the anti-jump control branch is used for controlling whether the anti-jump branch acts or not.
2. The circuit breaker trip prevention circuit of claim 1, wherein the circuit comprises: the switching-on/off switching-off device comprises a switching-on/off transfer switch, an anti-tripping relay, a switching-on maintaining relay, a switching-on coil and a direct-current power supply; the anti-tripping relay is a double-coil relay, the current coil has a starting function, and the voltage coil has a self-holding function;
the hand is closed the branch road and is included: one end of a first group of normally open contacts of the switching-on and switching-off transfer switch is connected with the anode of the direct-current power supply, the other end of the first group of normally open contacts of the switching-on and switching-off transfer switch is connected with one end of a voltage normally closed contact of the tripping-prevention relay, the other end of the voltage normally closed contact of the tripping-prevention relay is connected with one end of a coil of the switching-on holding relay, and the other end of the coil of the switching-on holding relay is connected with.
3. The circuit breaker trip prevention circuit of claim 2, wherein the trip leg comprises: one end of a second group of normally open contacts of the switching-on and switching-off transfer switch is connected with the anode of the direct-current power supply, the other end of the second group of normally open contacts of the switching-on and switching-off transfer switch is connected with one end of the normally open contacts of the remote control switching-on and switching-off holding relay, and the other end of the normally open contacts of the remote control switching-on and switching-off holding relay is connected with one end.
4. The circuit breaker anti-trip circuit of claim 3, wherein the anti-trip branch comprises: one end of a voltage coil of the anti-tripping relay is connected with the other end of the first group of normally open contacts of the change-over switch; the other end of the voltage coil of the anti-tripping relay is connected with a common end of the current normally open contact of the anti-tripping relay and the voltage self-holding contact of the anti-tripping relay, and the other common end of the current normally open contact of the anti-tripping relay and the other common end of the voltage self-holding contact of the anti-tripping relay are used as the other end of the anti-tripping branch and connected with the negative electrode of the direct-current power supply.
5. The circuit breaker anti-trip circuit of claim 4, wherein the anti-trip control branch comprises:
one end of a current coil of the anti-tripping relay is connected with a common end of a current self-holding contact of the anti-tripping relay and a normally open contact of the protective tripping outlet relay, and the current self-holding contact of the anti-tripping relay and the other common end of the normally open contact of the protective tripping outlet relay are connected with the anode of the direct-current power supply; the other end of the current coil of the anti-tripping relay is connected with one end of an auxiliary normally open contact of the circuit breaker, and the other end of the auxiliary normally open contact of the circuit breaker is connected with the negative electrode of the direct-current power supply through a brake separating coil.
6. The circuit breaker trip prevention circuit of claim 5 wherein the voltage of the DC power source is 220V.
7. The circuit breaker trip prevention circuit of claim 5 further comprising a breaker auxiliary normally closed contact connected in series between the close hold relay coil and the close coil.
8. The circuit breaker trip prevention circuit of claim 5 wherein the latching contacts of the close hold relay are connected in parallel with the first set of normally open contacts of the switch-on/off transfer switch.
9. The circuit breaker trip prevention circuit of claim 5 wherein the normally open contact of the protective trip exit relay is connected in series with the protective trip pressure plate and then connected in parallel with the current self-holding contact of the trip prevention relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020360352.9U CN211629870U (en) | 2020-03-20 | 2020-03-20 | Circuit breaker anti-tripping circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020360352.9U CN211629870U (en) | 2020-03-20 | 2020-03-20 | Circuit breaker anti-tripping circuit |
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| Publication Number | Publication Date |
|---|---|
| CN211629870U true CN211629870U (en) | 2020-10-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020360352.9U Active CN211629870U (en) | 2020-03-20 | 2020-03-20 | Circuit breaker anti-tripping circuit |
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| Country | Link |
|---|---|
| CN (1) | CN211629870U (en) |
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- 2020-03-20 CN CN202020360352.9U patent/CN211629870U/en active Active
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