CN209803293U - Circuit breaker closing and opening control circuit broken wire monitoring and alarming circuit - Google Patents
Circuit breaker closing and opening control circuit broken wire monitoring and alarming circuit Download PDFInfo
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- CN209803293U CN209803293U CN201920405103.4U CN201920405103U CN209803293U CN 209803293 U CN209803293 U CN 209803293U CN 201920405103 U CN201920405103 U CN 201920405103U CN 209803293 U CN209803293 U CN 209803293U
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Abstract
the utility model discloses a circuit breaker close separating brake control circuit broken string monitoring alarm circuit, include: the system comprises a direct-current power supply, a microcomputer protection measurement and control device, a breaker auxiliary normally closed contact, a breaker auxiliary normally open contact, a closing coil, a separating coil, a closing monitoring red light and a jumping monitoring green light. The microcomputer protection measurement and control device comprises: the system comprises a switching-on position relay coil, a tripping position relay coil, a switching-on position relay auxiliary normally-open contact, a switching-on position relay auxiliary normally-closed contact, a tripping position relay auxiliary normally-open contact and a tripping position relay auxiliary normally-closed contact. An operator on duty can judge whether the opening and closing circuit of the circuit breaker is complete and reliable or not on site by checking alarm information displayed on the closing monitoring red light, the jumping monitoring green light and the liquid crystal panel of the microcomputer protection measurement and control device, and timely take effective measures, so that the closing efficiency of the circuit breaker is improved, the fault of the opening circuit of the circuit breaker is rapidly eliminated, and the safe and reliable operation of the circuit breaker is ensured.
Description
Technical Field
The utility model relates to a circuit breaker switching-on and switching-off return circuit fault monitoring technology field, concretely relates to circuit breaker switching-on and switching-off control circuit broken string monitoring alarm circuit.
Background
The circuit breaker is an important power supply device in a power system, high-voltage devices such as the circuit breaker and the like are overhauled, before the circuit breaker is powered on, a closing electrical control loop of the circuit breaker is complete, a closing change-over switch is operated, a closing coil of the circuit breaker is electrified, a closing operation mechanism is driven to act, and closing of the circuit breaker is completed; similarly, in the normal operation of the circuit breaker, the opening electrical control circuit of the circuit breaker should be complete and can be operated normally, when a line short-circuit fault occurs, the circuit breaker protects the action of the tripping outlet relay, the contact of the relay is closed, the opening coil of the circuit breaker is electrified to drive the opening operation mechanism to act, and the tripping of the circuit breaker is completed, so that the fault point is cut off.
if the external condition of closing before the circuit breaker closes a floodgate and transmits power does not have, can not effectively report to the police and monitor in advance, will reduce closing operation efficiency, influence the user and transmit power on time, perhaps if the circuit breaker separating brake return circuit is incomplete in the operation, when having the short circuit fault of circuit, the circuit breaker protection can refuse to move, only can trip off fault point more than grade, can lead to the generating line to lose the electric accident by a large scale. If the breaker opening electric loop fault can be found in time, the fault can be eliminated in time, and the large-area power loss accident of the bus can be avoided.
Therefore, it is necessary to find and monitor the breaker opening and closing electrical loop fault in time, and the conventional breaker opening and closing electrical loop fault monitoring is performed by an opening and closing position monitoring lamp on a microcomputer protection device.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve above-mentioned technical problem, proposed following technical scheme:
In a first aspect, the embodiment of the utility model provides a circuit breaker closes separating brake control circuit broken string monitoring alarm circuit, include: the system comprises a direct-current power supply, a microcomputer protection measurement and control device, a breaker auxiliary normally closed contact, a breaker auxiliary normally open contact, a closing coil, a separating coil, a closing monitoring red light and a jumping monitoring green light. Wherein: the microcomputer protection measurement and control device comprises: the system comprises a switching-on position relay coil, a tripping position relay coil, a switching-on position relay auxiliary normally-open contact, a switching-on position relay auxiliary normally-closed contact, a tripping position relay auxiliary normally-open contact and a tripping position relay auxiliary normally-closed contact; one end of the tripping position relay coil, the switching-on position relay coil and the tripping position relay auxiliary normally closed contact is electrically connected with the positive pole of the direct current power supply, two ends of the breaker auxiliary normally closed contact are respectively and electrically connected with the other end of the tripping position relay coil and one end of the switching-on coil, and the other end of the switching-on coil is electrically connected with the negative pole of the direct current power supply; two ends of the auxiliary normally open contact of the circuit breaker are respectively and electrically connected with the other end of the switching-on position relay coil and one end of the switching-off coil, and the other end of the switching-off coil is electrically connected with the negative electrode of the direct-current power supply; one end of the auxiliary normally closed contact of the switching-on position relay is electrically connected with the other end of the auxiliary normally closed contact of the tripping position relay, and the other end of the auxiliary normally closed contact of the switching-on position relay is arranged on a wiring terminal in the microcomputer protection measurement and control device; two ends of the auxiliary normally open contact of the switching-on position relay are respectively electrically connected with one end of the on-position monitoring red light and the negative electrode of the direct current power supply, and the other end of the on-position monitoring red light is electrically connected with the positive electrode of the direct current power supply; two ends of the auxiliary normally open contact of the trip position relay are respectively electrically connected with one end of the trip position monitoring green light and the negative pole of the direct current power supply, and the other end of the trip position monitoring green light is electrically connected with the positive pole of the direct current power supply; the direct-current power supply, the switching-on position relay coil, the auxiliary normally-open contact of the switching-on position relay, the auxiliary normally-closed contact of the tripping position relay, the auxiliary normally-open contact of the circuit breaker, the switching-off coil and the on-position monitoring red light form a switching-off control circuit disconnection monitoring alarm sub-circuit; the direct-current power supply, the tripping position relay coil, the tripping position relay auxiliary normally-open contact, the tripping position relay auxiliary normally-closed contact, the switching-on position relay auxiliary normally-closed contact, the breaker auxiliary normally-closed contact, the switching-on coil and the tripping monitoring green lamp form a switching-on control circuit disconnection monitoring alarm sub-circuit.
By adopting the implementation mode, an operator on duty can display alarm information of 'control loop disconnection' on a liquid crystal screen of a microcomputer protection measurement and control device by checking a combined and separated monitoring lamp on a control cabinet door panel of a high-voltage switch cabinet on site. Whether the opening and closing loop of the circuit breaker is complete and reliable can be judged, so that effective measures can be taken in time, the closing efficiency of the circuit breaker is improved, the fault of the opening loop of the circuit breaker is eliminated quickly, and the safe and reliable operation of the circuit breaker is ensured.
With reference to the first aspect, in a first possible implementation manner of the first aspect, the system further includes a local switching on/off change-over switch, where the local switching on/off change-over switch includes a first connection end, a second connection end, and a third connection end, one end of the first connection end is electrically connected to the positive electrode of the dc power supply, a second end of the first connection end is electrically connected to a first switching-on contact and a first switching-off contact of the local switching on/off change-over switch, two ends of the second connection end are respectively connected to the microcomputer protection measurement and control device and a second switching-on contact of the local switching on/off change-over switch, and two ends of the third connection end are respectively connected to the microcomputer protection measurement and control device and a second switching-off contact of the local switching.
Combine the first possible implementation of first aspect, in the second possible implementation of first aspect, tripping position relay coil with be provided with spring energy storage normally open contact between the supplementary normally closed contact of circuit breaker, spring energy storage normally open contact respectively with tripping position relay coil with the supplementary normally closed contact of circuit breaker is connected.
in combination with the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the spring energy storage normally open contact and the connection end of the trip position relay coil are further electrically connected with the microcomputer protection measurement and control device.
With reference to the third possible implementation manner of the first aspect, in the fourth possible implementation manner of the first aspect, the auxiliary normally open contact of the circuit breaker and the connection end of the switching-on position relay coil are further electrically connected to the microcomputer protection measurement and control device.
With reference to the first aspect, in a fifth possible implementation manner of the first aspect, the microcomputer protection measurement and control device is provided with a positive power supply connection terminal and a negative power supply connection terminal, the positive power supply connection terminal is electrically connected to a positive electrode of the dc power supply, and the negative power supply connection terminal is electrically connected to a negative electrode of the dc power supply.
with reference to the first aspect or any one of the first to the fifth possible implementation manners of the first aspect, in a sixth possible implementation manner of the first aspect, a dc circuit breaker is further disposed between the dc power supply and the power supply loop, and the dc circuit breaker is configured to cut off power supply of the dc power supply.
With reference to the sixth possible implementation manner of the first aspect, in a seventh possible implementation manner of the first aspect, the dc power voltage is 220V.
Combine seventh possible implementation of first aspect, in eighth possible implementation of first aspect, still include communication manager and backstage monitoring machine, communication manager respectively with microcomputer protection measurement and control device with backstage monitoring machine electricity is connected, backstage monitoring machine includes audible-visual annunciator and display screen, audible-visual annunciator is used for sending alarm signal, the display screen is used for showing circuit breaker separating brake or closing circuit broken string fault information.
Drawings
fig. 1 is a schematic structural diagram of a circuit breaker opening and closing control circuit disconnection monitoring alarm circuit provided by an embodiment of the present invention;
In fig. 1, the symbols are represented as:
KM-direct current power supply, QF 1-auxiliary normally closed contact of circuit breaker, QF 2-auxiliary normally open contact of circuit breaker, HQ-closing coil, TQ-opening coil, HD-closing position monitoring red light, LD-jumping position monitoring green light, TWJ-tripping position relay coil, TWJ 1-auxiliary normally open contact of tripping position relay, TWJ 2-auxiliary normally closed contact of tripping position relay, HWJ-closing position relay coil, HWJ 1-auxiliary normally open contact of closing position relay, HWJ 2-auxiliary normally closed contact of closing position relay, S1-spring energy storage normally open contact, QK-local opening and closing transfer switch; a-a first closing contact, B-a second closing contact, C-a first breaking contact, D-a second breaking contact, 1 DK-a direct current breaker, P1-a positive power supply connection terminal, P2-a negative power supply connection terminal.
Detailed Description
The present invention will be described with reference to the accompanying drawings and embodiments.
Fig. 1 is the embodiment of the utility model provides a structure schematic diagram of a circuit breaker on-off control circuit broken string monitoring alarm circuit, see fig. 1, circuit breaker on-off control circuit broken string monitoring alarm circuit includes: the system comprises a direct-current power supply KM, a microcomputer protection measurement and control device, a breaker auxiliary normally closed contact QF1, a breaker auxiliary normally open contact QF2, a closing coil HQ, a separating coil TQ, a closing monitoring red light HD and a jumping monitoring green light LD. Wherein: the microcomputer protection measurement and control device comprises: a switch-on position relay coil HWJ, a trip position relay coil TWJ, a switch-on position relay auxiliary normally-open contact HWJ1, a switch-on position relay auxiliary normally-closed contact HWJ2, a trip position relay auxiliary normally-open contact TWJ1, and a trip position relay auxiliary normally-closed contact TWJ 2.
One end of each of the trip position relay coil TWJ, the closing position relay coil HWJ and the trip position relay auxiliary normally closed contact TWJ2 is electrically connected with the positive electrode of the direct-current power supply KM, two ends of the breaker auxiliary normally closed contact QF1 are electrically connected with the other end of the trip position relay coil TWJ and one end of the closing coil HQ respectively, and the other end of the closing coil HQ is electrically connected with the negative electrode of the direct-current power supply KM; two ends of the breaker auxiliary normally-open contact QF2 are respectively electrically connected with the other end of the switching-on position relay coil HWJ and one end of the switching-off coil TQ, and the other end of the switching-off coil TQ is electrically connected with the negative electrode of the direct-current power supply KM.
One end of the auxiliary normally closed contact of the switching-on position relay is electrically connected with the other end of the auxiliary normally closed contact of the tripping position relay, and the other end of the auxiliary normally closed contact of the switching-on position relay is arranged on a wiring terminal in the microcomputer protection measurement and control device; two ends of the auxiliary normally open contact HWJ1 of the switching-on position relay are respectively electrically connected with one end of the on-position monitoring red light HD and the negative electrode of the direct-current power supply KM, and the other end of the on-position monitoring red light HD is electrically connected with the positive electrode of the direct-current power supply KM; two ends of the trip position relay auxiliary normally open contact TWJ1 are respectively electrically connected with one end of the trip position monitoring green light LD and the negative electrode of the direct current power supply KM, and the other end of the trip position monitoring green light LD is electrically connected with the positive electrode of the direct current power supply KM.
The direct-current power supply KM, the switching-on position relay coil HWJ, the auxiliary normally-open contact HWJ1 of the switching-on position relay, the auxiliary normally-closed contact HWJ2 of the switching-on position relay, the auxiliary normally-closed contact TWJ2 of the tripping position relay, the auxiliary normally-open contact QF2 of the circuit breaker, the switching-off coil TQ and the on-position monitoring red light HD form a switching-off control circuit disconnection monitoring alarm sub-circuit.
And the direct-current power supply KM, the trip position relay coil TWJ, the trip position relay auxiliary normally-open contact TWJ1, the trip position relay auxiliary normally-closed contact TWJ2, the switching-on position relay auxiliary normally-closed contact HWJ2, the breaker auxiliary normally-closed contact QF1, the switching-on coil HQ and the trip position monitoring green lamp LD form a switching-on control loop disconnection monitoring alarm sub-circuit.
The circuit breaker on-off control circuit disconnection monitoring alarm circuit in this embodiment also includes on-site on-off switch transfer switch QK, on-site on-off switch transfer switch QK includes first link, second link and third link. One end of the first connecting end is electrically connected with the positive electrode of the direct-current power supply KM, the second end of the first connecting end is electrically connected with the first closing contact A and the first opening contact C of the on-site switching-on/off changeover switch QK, two ends of the second connecting end are respectively connected with the microcomputer protection measuring and control device and the second closing contact B of the on-site switching-on/off changeover switch QK, and two ends of the third connecting end are respectively connected with the microcomputer protection measuring and control device and the second opening contact D of the on-site switching-on/off changeover switch QK.
Further, a spring energy storage normally open contact S1 is arranged between the trip position relay coil TWJ and the circuit breaker auxiliary normally closed contact QF1, and the spring energy storage normally open contact S1 is electrically connected with the trip position relay coil TWJ and the circuit breaker auxiliary normally closed contact QF1 respectively. And the connecting end of the spring energy storage normally open contact S1 and the trip position relay coil TWJ is also electrically connected with the microcomputer protection measurement and control device. The connection end of the breaker auxiliary normally open contact QF2 and the switching-on position relay coil HWJ is also electrically connected with the microcomputer protection measurement and control device.
in this embodiment, a positive power supply terminal P1 and a negative power supply terminal P2 are arranged on the microcomputer protection measurement and control device, the positive power supply terminal P1 is electrically connected with the positive pole of the dc power supply KM, and the negative power supply terminal P2 is electrically connected with the negative pole of the dc power supply KM.
Still be provided with direct current circuit breaker 1DK between direct current power supply KM and the power supply loop, direct current circuit breaker 1DK is used for cutting off direct current power supply KM supplies power, direct current power supply KM voltage is 220V.
Still include communication supervisor and backstage monitoring machine, the communication supervisor respectively with computer protection measurement and control device with backstage monitoring machine electricity is connected, backstage monitoring machine includes audible-visual annunciator and display screen, audible-visual annunciator is used for sending alarm signal, the display screen is used for showing circuit breaker separating brake or combined floodgate return circuit broken string fault information.
In this embodiment, when the closing control circuit of the circuit breaker, for example, when external conditions such as spring energy storage have all been met, at this moment, trip position relay coil TWJ gets electric, and the jump position on the control cabinet door panel of the high-voltage switch cabinet is checked and red light LD is monitored and is lighted, and operation on the spot closes and closes the switch change-over switch QK to the closing position, and first closing contact a and second closing contact B of QK switch on, and closing coil HQ gets electric, drives operating mechanism and accomplishes the circuit breaker closing operation task. Meanwhile, the auxiliary normally closed contact QF1 of the circuit breaker is opened, the trip position relay coil TWJ is de-energized, the auxiliary normally open contact TWJ1 thereof is opened, the trip position monitoring green lamp LD is no longer lighted, the trip position relay auxiliary normally closed contact TWJ2 is closed again, and simultaneously the auxiliary normally open contact QF2 of the circuit breaker is closed and turned on.
In the process of closing the circuit breaker, if the opening operation of the circuit breaker needs to be carried out, the on-site opening and closing change-over switch QK is operated to an opening position, the first opening contact C and the second opening contact D of the QK are connected, the opening coil HQ is electrified, and the operating mechanism is driven to complete the opening operation task of the circuit breaker. Meanwhile, the breaker auxiliary normally open contact QF2 is opened, the switch-on position relay coil HWJ loses power, the auxiliary normally open contact HWJ1 is opened, the switch-on monitoring red light HD is not lighted any more, the switch-on position relay auxiliary normally closed contact HWJ2 is closed again, and the breaker auxiliary normally closed contact QF1 is closed and switched on again.
In the switching-on operation process of the circuit breaker, the auxiliary normally-open contact QF2 of the circuit breaker is closed, the direct-current positive and negative power supplies are connected with the switching-on monitoring loop, the switching-on position relay coil HWJ is electrified, the auxiliary normally-open contact HWJ1 of the switching-on position relay coil is closed, and the switching-on monitoring red light HD on the panel of the control cabinet door of the high-voltage switch cabinet is lightened to indicate that the circuit breaker is at the switching-on position. When a tripping coil TQ in a tripping electrical control loop of the circuit breaker, a normally open contact QF2 of the circuit breaker and a certain element of a connecting wire loop of the circuit breaker have faults, the closing monitoring loop is not closed, a relay coil HWJ at the switching-on position cannot be electrified, an auxiliary normally open contact HWJ1 of the circuit breaker is not closed, a closing monitoring red light HD cannot be lightened, a running operator is prompted to notice that the tripping loop of the circuit breaker is incomplete, the tripping operation cannot be carried out at the moment, the reason of the failure of the tripping loop needs to be immediately searched, and when the short-circuit fault of a line supplied by the circuit breaker is prevented, the protection of the circuit breaker can be refused to cause the expansion of the range of the fault power.
Meanwhile, because the closing position relay coil HWJ loses power, the normally closed contact HWJ2 is reset and closed, and is connected with the trip position relay normally closed contact TWJ2 in series (when the contact is closed, the trip position relay coil TWJ is reset and closed because the trip position relay coil TWJ cannot be powered), an alarm loop of 'control loop disconnection' is connected, characters of 'control loop disconnection' are displayed on a liquid crystal screen of the microcomputer protection measurement and control device, and sound alarm information is sent out.
The high-voltage apparatus overhauls the end, and the circuit breaker prepares the power transmission, if outside combined floodgate conditions such as the spring energy storage of circuit breaker have all possessed, DC power has put through the jump position and has kept watch on the return circuit, then trip position relay coil TWJ gets electric, and its supplementary normally open contact TWJ1 is closed, and the jump position on the switch board door panel of high tension switchgear is kept watch on green light LD and is lighted, shows that circuit breaker combined floodgate return circuit is complete. This indicates that the circuit breaker has a power transmission condition at this time. If one or more elements of the external closing condition of the circuit breaker do not exist, the jumping monitoring loop is not closed, the coil TWJ of the tripping position relay is not electrified, the auxiliary normally open contact TWJ1 is not closed, the jumping monitoring green light LD cannot be lightened, an operation operator is prompted to notice that the closing control loop of the circuit breaker is incomplete, the closing operation of the circuit breaker cannot be carried out, and the fault reason of the closing loop needs to be immediately searched. Meanwhile, due to the fact that a coil TWJ of the jump relay loses power, a normally closed contact TWJ2 is closed again and is connected with an auxiliary normally closed contact HWJ2 of the switching-on position relay in series (when the contact is in a switching-off state of the circuit breaker, the coil HWJ of the switching-on position relay is closed again due to the fact that power cannot be supplied), the protection device judges through logic, namely, the switching-off control circuit or the switching-on control circuit of the circuit breaker is broken, alarm information of 'control circuit broken' is sent out, characters of 'control circuit broken' are displayed on a liquid crystal screen of the microcomputer protection measurement and control device, and sound alarm information is sent out. Of course, the alarm information can also be transmitted to the background monitor through the communication manager via the communication interface of the protection device, and corresponding audible and visual alarm and character display are carried out on the background monitor.
According to the embodiment, the circuit breaker switching-on/off control circuit disconnection monitoring alarm circuit is provided, and an operation person on duty can display the alarm information of 'control circuit disconnection' on the liquid crystal screen of the microcomputer protection measurement and control device by checking the switching-on/off monitoring lamp on the control cabinet door panel of the high-voltage switch cabinet on site. Whether the opening and closing loop of the circuit breaker is complete and reliable can be judged, so that effective measures can be taken in time, the closing efficiency of the circuit breaker is improved, the fault of the opening loop of the circuit breaker is eliminated quickly, and the safe and reliable operation of the circuit breaker is ensured.
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. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Of course, the above description is not limited to the above examples, and technical features of the present invention that are not described in the present application may be implemented by or using the prior art, and are not described herein again; the above embodiments and drawings are only used for illustrating the technical solutions of the present invention and are not intended to limit the present invention, and if it is replaced, the present invention is only combined with and described in detail with reference to the preferred embodiments, and those skilled in the art should understand that changes, modifications, additions or substitutions made by those skilled in the art within the spirit of the present invention should also belong to the protection scope of the claims of the present invention.
Claims (9)
1. The utility model provides a circuit breaker switching-on/off control circuit broken string monitoring alarm circuit which characterized in that includes: DC power supply, microcomputer protection measurement and control device, the supplementary normally closed contact of circuit breaker, the supplementary normally open contact of circuit breaker, closing a floodgate coil, separating brake coil, closing a position and keeping watch on the red light and jump a position and keep watch on the green light, wherein: the microcomputer protection measurement and control device comprises: the system comprises a switching-on position relay coil, a tripping position relay coil, a switching-on position relay auxiliary normally-open contact, a switching-on position relay auxiliary normally-closed contact, a tripping position relay auxiliary normally-open contact and a tripping position relay auxiliary normally-closed contact;
One end of the tripping position relay coil, the switching-on position relay coil and the tripping position relay auxiliary normally closed contact is electrically connected with the positive pole of the direct current power supply, two ends of the breaker auxiliary normally closed contact are respectively and electrically connected with the other end of the tripping position relay coil and one end of the switching-on coil, and the other end of the switching-on coil is electrically connected with the negative pole of the direct current power supply; two ends of the auxiliary normally open contact of the circuit breaker are respectively and electrically connected with the other end of the switching-on position relay coil and one end of the switching-off coil, and the other end of the switching-off coil is electrically connected with the negative electrode of the direct-current power supply;
One end of the auxiliary normally closed contact of the switching-on position relay is electrically connected with the other end of the auxiliary normally closed contact of the tripping position relay, and the other end of the auxiliary normally closed contact of the switching-on position relay is arranged on a wiring terminal in the microcomputer protection measurement and control device; two ends of the auxiliary normally open contact of the switching-on position relay are respectively electrically connected with one end of the on-position monitoring red light and the negative electrode of the direct current power supply, and the other end of the on-position monitoring red light is electrically connected with the positive electrode of the direct current power supply; two ends of the auxiliary normally open contact of the trip position relay are respectively electrically connected with one end of the trip position monitoring green light and the negative pole of the direct current power supply, and the other end of the trip position monitoring green light is electrically connected with the positive pole of the direct current power supply;
The direct-current power supply, the switching-on position relay coil, the auxiliary normally-open contact of the switching-on position relay, the auxiliary normally-closed contact of the tripping position relay, the auxiliary normally-open contact of the circuit breaker, the switching-off coil and the on-position monitoring red light form a switching-off control circuit disconnection monitoring alarm sub-circuit;
The direct-current power supply, the tripping position relay coil, the tripping position relay auxiliary normally-open contact, the tripping position relay auxiliary normally-closed contact, the switching-on position relay auxiliary normally-closed contact, the breaker auxiliary normally-closed contact, the switching-on coil and the tripping monitoring green lamp form a switching-on control circuit disconnection monitoring alarm sub-circuit.
2. The circuit breaker on-off control loop disconnection monitoring and alarming circuit of claim 1, further comprising an on-site on-off switch, wherein the on-site on-off switch comprises a first connecting end, a second connecting end and a third connecting end, one end of the first connecting end is electrically connected with a positive electrode of the direct current power supply, the second end of the first connecting end is electrically connected with a first switching-on contact and a first switching-off contact of the on-site on-off switch, two ends of the second connecting end are respectively connected with the microcomputer protection measurement and control device and a second switching-on contact of the on-site on-off switch, and two ends of the third connecting end are respectively connected with the microcomputer protection measurement and control device and the second switching-off contact of the on-site on-off switch.
3. The circuit breaker closing and opening control loop disconnection monitoring alarm circuit according to claim 2, wherein a spring energy storage normally open contact is arranged between the trip position relay coil and the circuit breaker auxiliary normally closed contact, and the spring energy storage normally open contact is electrically connected with the trip position relay coil and the circuit breaker auxiliary normally closed contact respectively.
4. The circuit breaker on-off control loop disconnection monitoring alarm circuit of claim 3, wherein the connection end of the spring energy storage normally-open contact and the tripping position relay coil is also electrically connected with the microcomputer protection measurement and control device.
5. The circuit breaker opening and closing control loop disconnection monitoring alarm circuit according to claim 4, wherein the connection end of the breaker auxiliary normally-open contact and the closing position relay coil is also electrically connected with the microcomputer protection measurement and control device.
6. the circuit breaker on-off control loop disconnection monitoring alarm circuit according to claim 1, wherein a positive power supply terminal and a negative power supply terminal are arranged on the microcomputer protection measurement and control device, the positive power supply terminal is electrically connected with a positive pole of the direct current power supply, and the negative power supply terminal is electrically connected with a negative pole of the direct current power supply.
7. The circuit breaker opening and closing control loop disconnection monitoring alarm circuit according to any one of claims 1-6, wherein a direct current circuit breaker is further arranged between the direct current power supply and the power supply loop, and the direct current circuit breaker is used for cutting off power supply of the direct current power supply.
8. The circuit breaker opening and closing control loop disconnection monitoring alarm circuit according to claim 7, wherein the direct current power supply voltage is 220V.
9. The circuit breaker switching-on and switching-off control circuit disconnection monitoring alarm circuit according to claim 8, further comprising a communication manager and a background monitor, wherein the communication manager is respectively electrically connected with the microcomputer protection monitoring and control device and the background monitor, the background monitor comprises an audible and visual alarm and a display screen, the audible and visual alarm is used for sending out alarm signals, and the display screen is used for displaying circuit breaker switching-off or switching-on circuit disconnection fault information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920405103.4U CN209803293U (en) | 2019-03-28 | 2019-03-28 | Circuit breaker closing and opening control circuit broken wire monitoring and alarming circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920405103.4U CN209803293U (en) | 2019-03-28 | 2019-03-28 | Circuit breaker closing and opening control circuit broken wire monitoring and alarming circuit |
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| Publication Number | Publication Date |
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| CN209803293U true CN209803293U (en) | 2019-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920405103.4U Withdrawn - After Issue CN209803293U (en) | 2019-03-28 | 2019-03-28 | Circuit breaker closing and opening control circuit broken wire monitoring and alarming circuit |
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| CN (1) | CN209803293U (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109884521A (en) * | 2019-03-28 | 2019-06-14 | 山东钢铁股份有限公司 | A kind of circuit-breaker switching on-off control loop template monitoring, alarming circuit |
| CN111610436A (en) * | 2020-04-07 | 2020-09-01 | 福建福清核电有限公司 | Monitoring circuit of closing microswitch of medium-voltage contactor in nuclear power plant |
| CN113872167A (en) * | 2021-11-24 | 2021-12-31 | 国网重庆市电力公司电力科学研究院 | Device and method for preventing protection misoperation or refusal caused by direct current system ground fault |
| CN115267484A (en) * | 2022-05-27 | 2022-11-01 | 国网江苏省电力有限公司南通供电分公司 | Fault monitoring method and system for relay protection operation circuit |
-
2019
- 2019-03-28 CN CN201920405103.4U patent/CN209803293U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884521A (en) * | 2019-03-28 | 2019-06-14 | 山东钢铁股份有限公司 | A kind of circuit-breaker switching on-off control loop template monitoring, alarming circuit |
| CN109884521B (en) * | 2019-03-28 | 2024-03-12 | 山东钢铁股份有限公司 | Circuit breaker divide-shut brake control circuit broken wire monitoring alarm circuit |
| CN111610436A (en) * | 2020-04-07 | 2020-09-01 | 福建福清核电有限公司 | Monitoring circuit of closing microswitch of medium-voltage contactor in nuclear power plant |
| CN113872167A (en) * | 2021-11-24 | 2021-12-31 | 国网重庆市电力公司电力科学研究院 | Device and method for preventing protection misoperation or refusal caused by direct current system ground fault |
| CN113872167B (en) * | 2021-11-24 | 2024-05-28 | 国网重庆市电力公司电力科学研究院 | Device and method for preventing protection misoperation or refusal operation caused by direct current system ground fault |
| CN115267484A (en) * | 2022-05-27 | 2022-11-01 | 国网江苏省电力有限公司南通供电分公司 | Fault monitoring method and system for relay protection operation circuit |
| CN115267484B (en) * | 2022-05-27 | 2024-05-31 | 国网江苏省电力有限公司南通供电分公司 | Relay protection operation loop fault monitoring method and system |
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Granted publication date: 20191217 Effective date of abandoning: 20240312 |