CN111443281B - Electrical blocking device and circuit breaker or isolating switch - Google Patents
Electrical blocking device and circuit breaker or isolating switch Download PDFInfo
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- CN111443281B CN111443281B CN202010185753.XA CN202010185753A CN111443281B CN 111443281 B CN111443281 B CN 111443281B CN 202010185753 A CN202010185753 A CN 202010185753A CN 111443281 B CN111443281 B CN 111443281B
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- latching
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/16—Indicators for switching condition, e.g. "on" or "off"
Abstract
The application provides an electric blocking device and circuit breaker or isolator includes: the relay comprises a first relay, a second relay, a third relay and a fourth relay. The first end of the first relay is electrically connected with the negative bus through the first locking switch. The first end of the second relay is electrically connected with the second end of the first relay. And the third end of the first relay is electrically connected with the negative bus through the second latching switch. The first end of the third relay is electrically connected with the second end of the second relay. And the third end of the second relay is electrically connected with the negative bus through a third latching switch. And the fourth end of the first relay, the fourth end of the second relay, the second end of the third relay and the first end of the fourth relay are all connected with the positive bus in common. And the second end of the fourth relay is electrically connected with the third end of the third relay. The fourth end of the third relay is electrically connected with the negative bus through a fourth latching switch, and the third end of the fourth relay is used for electrically connecting a circuit breaker or a disconnecting switch.
Description
Technical Field
The present application relates to the field of electrical equipment technology, and more particularly, to an electrical latching device and a circuit breaker or disconnector.
Background
The breaker and the isolating switch of the transformer substation are required to meet the requirements of electric five-prevention, so that auxiliary contacts of the breaker and the isolating switch participating in the locking interval are connected in series on a control loop of each breaker and isolating switch. The auxiliary contacts may be taken from the corresponding equipment mechanism cabinet by means of cables.
However, because of the severe operation environment inside the mechanism box or the reason that the rotation inside the mechanism is not in place, the auxiliary contact of the mechanism box is often in poor contact or abnormal, so that the breaker or the isolating switch cannot be normally switched on or off. The current method is to manually check each locking condition by using a multimeter potential measuring method, which wastes time and labor.
Disclosure of Invention
Therefore, it is necessary to provide an electrical locking device and a circuit breaker or a disconnecting switch, which are capable of solving the problems that when the locking conditions of the existing circuit breaker or disconnecting switch are not satisfied, the time and labor are wasted because each locking condition needs to be checked manually by a method of measuring potential by using a multimeter.
An electrical blocking device for a circuit breaker or disconnector, comprising:
the first end of the first relay is electrically connected with the negative bus through a first latching switch and is used for determining whether the first latching switch is normally closed;
a first end of the second relay is electrically connected with a second end of the first relay, a third end of the first relay is electrically connected with the negative bus through a second latching switch, and the second relay is used for determining whether the second latching switch is normally closed;
a first end of the third relay is electrically connected with a second end of the second relay, a third end of the second relay is electrically connected with the negative bus through a third latching switch, and the third relay is used for determining whether the third latching switch is normally closed; and
the fourth relay, the fourth end of first relay the fourth end of second relay the second end of third relay with the first end of fourth relay all connects with positive pole generating line altogether, the second end of fourth relay with the third end electricity of third relay is connected, the fourth end of third relay pass through fourth blocking switch with negative pole generating line electricity is connected, the third end of fourth relay is used for the electricity to connect circuit breaker or isolator, the fourth end of fourth relay is used for the positive pole of electric connection power supply, the fourth relay is used for confirming whether fourth blocking switch is normally closed.
In one embodiment, when the first latching switch, the second latching switch, the third latching switch and the fourth latching switch are all normally closed, the circuit breaker or the isolating switch is controlled to normally open or close;
when any one of the first latching switch, the second latching switch, the third latching switch and the fourth latching switch is abnormally closed, the circuit breaker or the isolating switch cannot be controlled to normally open or close.
In one embodiment, when any one of the first latching switch, the second latching switch, the third latching switch and the fourth latching switch is abnormally closed, the relay corresponding to the latching switch which is abnormally closed outputs a fault signal.
In one embodiment, the first relay, the second relay, the third relay, and the fourth relay are all normally open relays.
In one embodiment, the first relay includes:
a first end of the first coil is electrically connected with the negative bus through a first locking switch, and a second end of the first coil is electrically connected with the positive bus; and
a first switch, a first end of which is electrically connected with the negative bus through a second latching switch, and a second end of which is electrically connected with a first end of the second relay;
when the first coil is electrified, the first switch is closed, and when the first coil is powered off, the first switch is opened.
In one embodiment, the second relay includes:
a first end of the second coil is electrically connected with a second end of the first relay, and a second end of the second coil is electrically connected with the positive bus; and
a second switch, a first end of which is electrically connected with the negative bus through the third latching switch, and a second end of which is electrically connected with a first end of the third relay;
when the second coil is powered on, the second switch is closed, and when the second coil is powered off, the second switch is opened.
In one embodiment, the third relay includes:
a third coil, a first end of the third coil being electrically connected to the second end of the second relay, a second end of the third coil being electrically connected to the positive bus bar; and
a first end of the third switch is electrically connected with the negative bus through the fourth latching switch, and a second end of the third switch is electrically connected with a second end of the fourth relay;
and when the third coil is powered on, the third switch is closed, and when the third coil is powered off, the third switch is opened.
In one embodiment, the fourth relay includes:
a first end of the fourth coil is electrically connected with a third end of the third relay, and a second end of the fourth coil is electrically connected with the positive bus; and
a first end of the fourth switch is used for being electrically connected with a first end of the breaker or the isolating switch, and a second end of the fourth switch is used for being electrically connected with the positive pole of the power supply 1;
and when the fourth coil is powered on, the fourth switch is switched on, and when the fourth coil is powered off, the fourth switch is switched off.
In one embodiment, the first relay, the second relay, the third relay and the fourth relay are all relays with indicator lights.
A circuit breaker or disconnector comprising an electrical latching device as claimed in any one of the above embodiments; and
and the control loop is electrically connected with the third end of the fourth relay.
Compared with the prior art, the electrical locking device and the circuit breaker or the isolating switch respectively carry out electrical detection on the first locking switch, the second locking switch, the third locking switch and the fourth locking switch which correspond to the first relay, the second relay, the third relay and the fourth relay so as to determine whether each locking switch is normally closed. Meanwhile, when any one of the locking switches is abnormally closed, the relay corresponding to the locking switch which is abnormally closed outputs a fault signal to remind a worker, and the worker is prevented from checking each locking condition by using a universal meter potential measuring method, so that the checking efficiency is improved, and time and labor are saved.
Drawings
Fig. 1 is a schematic circuit diagram of an electrical latching apparatus provided in an embodiment of the present application;
FIG. 2 is a schematic circuit diagram of an electrical lockout device according to an embodiment of the present application;
FIG. 3 is a schematic electrical circuit diagram of an electrical latching apparatus according to another embodiment of the present application;
fig. 4 is a schematic circuit diagram of a circuit breaker or a disconnector according to an embodiment of the present disclosure.
10 electric locking device
100 first relay
101 negative electrode bus
102 positive electrode bus
110 first latching switch
111 first coil
112 first switch
20 circuit breaker or disconnector
21 control loop
200 second relay
201 power supply
210 second latching switch
211 second coil
212 second switch
300 third relay
310 third latching switch
311 third coil
312 third switch
400 fourth relay
410 fourth latching switch
411 fourth coil
412 fourth switch
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and it is therefore not intended to be limited to the embodiments disclosed below.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
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 application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, an embodiment of the present application provides an electrical latching apparatus 10 for use with a circuit breaker or disconnector 20. The electrical latching apparatus 10 includes: a first relay 100, a second relay 200, a third relay 300, and a fourth relay 400. A first end of the first relay 100 is electrically connected to the negative bus bar 101 through a first latching switch 110. The first relay 100 is used to determine whether the first latching switch 110 is normally closed. A first end of the second relay 200 is electrically connected to a second end of the first relay 100. The third terminal of the first relay 100 is electrically connected to the negative bus bar 101 through a second latching switch 210. The second relay 200 is used to determine whether the second latching switch 210 is normally closed. A first end of the third relay 300 is electrically connected to a second end of the second relay 200. The third terminal of the second relay 200 is electrically connected to the negative bus 101 through a third latching switch 310.
The third relay 300 is used to determine whether the third latching switch 310 is normally closed. The fourth terminal of the first relay 100, the fourth terminal of the second relay 200, the second terminal of the third relay 300, and the first terminal of the fourth relay 400 are all connected to the positive bus 102. A second terminal of the fourth relay 400 is electrically connected to a third terminal of the third relay 300. The fourth terminal of the third relay 300 is electrically connected to the negative bus bar 101 through a fourth latching switch 410. The third terminal of the fourth relay 400 is used for electrically connecting the circuit breaker or the disconnector 20. The fourth end of the fourth relay 400 is electrically connected to the positive electrode of the power supply 201. The fourth relay 400 is used to determine whether the fourth latching switch 410 is normally closed.
In one embodiment, the first relay 100 may be a relay with an indicator light. Specifically, when the first relay 100 operates, the indicator lamp is turned on. I.e. this time it means that the first latching switch 110 is in a normally closed state. When the first relay 100 is not operated, the indicator lamp is not lit (i.e., is in an off state). That is, this time, it indicates that the first locking switch 110 is in an unclosed or closed abnormal state. In one embodiment, the first relay 100 may also be a plug-in relay with an indicator light, which is easy to disassemble.
In one embodiment, the first lockout switch 110 may be a lockout condition of the circuit breaker or disconnector 20 participating in lockout. That is, when the first locking switch 110 is in a normally closed state and other locking conditions of the circuit breaker or the isolating switch 20 are normal, the circuit breaker or the isolating switch 20 may be controlled to perform closing and opening operations. In one embodiment, the manner of controlling the circuit breaker or the isolating switch 20 to perform the switching-on and switching-off actions is not limited, and only the circuit breaker or the isolating switch 20 is ensured to perform the switching-on and switching-off actions. In one embodiment, the circuit breaker or the disconnecting switch 20 can be controlled to perform closing and opening actions by a control command issued by a controller. In one embodiment, the circuit breaker or the isolating switch 20 can be manually controlled to perform the closing and opening actions.
In one embodiment, the second relay 200 may be a relay with an indicator light. Specifically, when the second relay 200 is operated, the indicator lamp is turned on. That is, this time, it means that the second latching switch 210 is in the normally closed state. When the second relay 200 is not operated, the indicator lamp is not lit (i.e., is in an off state). That is, this time, it indicates that the second latching switch 210 is in an unclosed or closed abnormal state (e.g., poor contact). In one embodiment, the second relay 200 may also be a plug-in relay with an indicator light, which is convenient to disassemble. In one embodiment, the second lockout switch 210 may be a lockout condition of the circuit breaker or disconnector 20 participating in lockout. That is, when the second locking switch 210 is in a normally closed state and other locking conditions of the circuit breaker or the isolating switch 20 are normal, the circuit breaker or the isolating switch 20 may be controlled to perform closing and opening operations.
In one embodiment, the third relay 300 may be a relay with an indicator light. Specifically, when the third relay 300 is operated, the indicator lamp is turned on. I.e. this time, the third latching switch 310 is in a normally closed state. When the third relay 300 is not operated, the indicator lamp is not lit (i.e., is in an off state). That is, this time, it indicates that the third locking switch 310 is in an unclosed or closed abnormal state (e.g., poor contact). In one embodiment, the third relay 300 may also be a plug-in relay with an indicator light, which is convenient to disassemble. In one embodiment, the third lockout switch 310 may be a lockout condition of the circuit breaker or disconnector 20 participating in lockout. That is, when the third locking switch 310 is in a normally closed state and other locking conditions of the circuit breaker or the isolating switch 20 are normal, the circuit breaker or the isolating switch 20 may be controlled to perform closing and opening operations.
In one embodiment, the fourth relay 400 may be a relay with an indicator light. Specifically, when the fourth relay 400 operates, an indicator lamp is turned on. That is, this time, it means that the fourth latching switch 410 is in a normally closed state. When the fourth relay 400 is not operated, the indicator lamp is not lit (i.e., is in an off state). That is, this time, it indicates that the fourth latching switch 410 is in an unclosed or closed abnormal state (e.g., poor contact). In one embodiment, the fourth relay 400 may also be a plug-in relay with an indicator light, which is convenient to disassemble. In one embodiment, the fourth lockout switch 410 may be a lockout condition of the circuit breaker or disconnector 20 participating in lockout. That is, when the fourth latching switch 410 is in a normally closed state and other latching conditions of the circuit breaker or the isolating switch 20 are normal, the circuit breaker or the isolating switch 20 may be controlled to perform closing and opening operations.
As can be seen from the above description, when the first latching switch 110, the second latching switch 210, the third latching switch 310 and the fourth latching switch 410 are normally closed, that is, when the first relay 100, the second relay 200, the third relay 300 and the fourth relay 400 are normally operated, the circuit breaker or the isolating switch 20 may be controlled to perform a normal opening or closing operation.
When any one of the first latching switch 110, the second latching switch 210, the third latching switch 310 and the fourth latching switch 410 is abnormally closed, that is, any one of the first relay 100, the second relay 200, the third relay 300 and the fourth relay 400 does not normally operate, the circuit breaker or the disconnecting switch 20 cannot be normally opened or closed at this time. That is, only when all four locking conditions of the breaker or the disconnector 20 are satisfied, the breaker or the disconnector 20 may be controlled to perform an opening or closing operation.
In one embodiment, the lockout conditions of the circuit breaker or disconnector 20 comprise at least four. I.e. the electrical blocking device 10 comprises at least four relays. That is, one relay corresponds to one latching switch, so that when the circuit breaker or the disconnecting switch 20 has more than ten latching conditions, a worker can quickly check each latching condition through the corresponding relay.
In one embodiment, when any one of the first relay 100, the second relay 200, the third relay 300, and the fourth relay 400 does not operate normally, the corresponding relay may output a fault signal (for example, an indicator lamp is not turned on), and at this time, a worker may quickly find and check the latching switch corresponding to the relay according to the fault signal, thereby improving the checking efficiency. That is, the staff accessible each relay in the electric blocking device 10 inspects each blocking switch respectively to avoid blocking switch to appear contact failure or not closed phenomenon, lead to circuit breaker or isolator 10 can not normally divide-shut brake, and then improve staff's inspection efficiency.
In this embodiment, the first relay 100, the second relay 200, the third relay 300, and the fourth relay 400 electrically detect the corresponding first latching switch 110, the corresponding second latching switch 210, the corresponding third latching switch 310, and the corresponding fourth latching switch 410, respectively, to determine whether the respective latching switches are normally closed. Meanwhile, when any one of the locking switches is abnormally closed, the relay corresponding to the locking switch which is abnormally closed outputs a fault signal to remind a worker, and the worker is prevented from checking each locking condition by using a universal meter potential measuring method, so that the checking efficiency is improved, and time and labor are saved.
In one embodiment, the first relay 100, the second relay 200, the third relay 300, and the fourth relay 400 are all normally open relays. That is, when the first relay 100, the second relay 200, the third relay 300, or the fourth relay 400 is powered on, the switches in the relays are in a closed state. When the power is off, the switches in the relays are in a normally open state.
Referring to fig. 2, in one embodiment, the first relay 100 includes: a first coil 111 and a first switch 112. A first end of the first coil 111 is electrically connected to the negative bus bar 101 through the first latching switch 110. A second end of the first coil 111 is electrically connected to the positive bus bar 102. A first end of the first switch 112 is electrically connected to the negative bus bar 101 through a second latching switch 210. A second terminal of the first switch 112 is electrically connected to a first terminal of the second relay 200. When the first coil 111 is powered on, the first switch 112 is closed. When the first coil 111 is powered down, the first switch 112 is turned off.
When the electrical latching apparatus 10 is in use, when the first coil 111 is normally powered on and controls the first switch 112 to be normally closed, it means that the first latching switch 110 is normally closed. When the first coil 111 is not powered, the first switch 112 is in an open state. This indicates that the first latching switch 110 is not normally closed. I.e., the first latching switch 110 is in a poor contact or not closed state. At this time, the first relay 100 outputs a fault signal, so that a worker can quickly determine the operating state of the first latching switch 110 for inspection and maintenance.
In one embodiment, the second relay 200 includes: a second coil 211 and a second switch 212. A first end of the second coil 211 is electrically connected to a second end of the first relay 100. A second end of the second coil 211 is electrically connected to the positive electrode bus bar 102. A first end of the second switch 212 is electrically connected to the negative bus bar 101 through the third latching switch 310. A second terminal of the second switch 212 is electrically connected to a first terminal of the third relay 300. When the second coil 211 is powered on, the second switch 212 is closed. When the second coil 211 is powered down, the second switch 212 is turned off.
When the electrical latching apparatus 10 is in use, when the second coil 211 is normally powered on and controls the second switch 212 to be normally closed, it indicates that the second latching switch 210 is normally closed. And when the second coil 211 is not powered, the second switch 212 is in an off state. This indicates that the second latching switch 210 is not normally closed. I.e. the second latching switch 210 is in a poor contact or not closed state. At this time, the second relay 200 outputs a fault signal, so that a worker can quickly determine the operating state of the second latching switch 210, thereby facilitating inspection and maintenance.
In one embodiment, the third relay 300 includes: a third coil 311 and a third switch 312. A first end of the third coil 311 is electrically connected to a second end of the second relay 200. A second end of third coil 311 is electrically connected to positive bus bar 102. A first end of the third switch 312 is electrically connected to the negative bus bar 101 through the fourth latching switch 410. A second terminal of the third switch 312 is electrically connected to a second terminal of the fourth relay 400. When the third coil 311 is powered on, the third switch 312 is closed. When the third coil 311 is powered down, the third switch 312 is turned off.
When the electrical locking apparatus 10 is in use, when the third coil 311 is normally powered on and controls the third switch 312 to be normally closed, it means that the third locking switch 310 is normally closed. And when the third coil 311 is not powered, the third switch 312 is in an off state. This indicates that the third latching switch 310 is not normally closed. I.e., the third latching switch 310 is in a poor contact or not closed state. At this time, the third relay 300 outputs a fault signal, so that a worker can quickly determine the operating state of the third latching switch 310 for inspection and maintenance.
In one embodiment, the fourth relay 400 includes: a fourth coil 411 and a fourth switch 412. A first terminal of the fourth coil 411 is electrically connected to a third terminal of the third relay 300. A second end of the fourth coil 411 is electrically connected to the positive bus bar 102. The first terminal of the fourth switch 412 is used to electrically connect the first terminal of the circuit breaker or disconnector 20. The second end of the fourth switch 412 is electrically connected to the positive electrode of the power supply 201. When the fourth coil 411 is powered on, the fourth switch 412 is closed. When the fourth coil 411 is powered down, the fourth switch 412 is turned off.
When the electrical latching apparatus 10 is in use, when the fourth coil 411 is normally powered on and controls the fourth switch 412 to be normally closed, it means that the fourth latching switch 410 is normally closed. And when the fourth coil 411 is not powered on, the fourth switch 412 is in an off state. This indicates that the fourth latching switch 410 is not normally closed. I.e., the fourth latching switch 410 is in a poor contact or not closed state. At this time, the fourth relay 400 outputs a fault signal, so that a worker can quickly determine the operating state of the fourth latching switch 410 for inspection and maintenance.
In one embodiment, the electrical blocking apparatus 10 may include a plurality of relays in addition to the first relay 100, the second relay 200, the third relay 300, and the fourth relay 400. When the latching conditions of the circuit breaker or the disconnecting switch 20 participating in latching are four (that is, when four latching switches are included), each latching condition can be respectively accessed to the corresponding relay, and the remaining relays not accessed to the latching condition can be short-circuited (as shown in fig. 3), and at this time, monitoring of each latching condition can also be completed.
Referring to fig. 4, an embodiment of a circuit breaker or a disconnector 20 of the present application includes an electrical blocking device 10 and a control circuit 21 according to any of the embodiments described above. The control circuit 21 is electrically connected to a third terminal of the fourth relay 400. In one embodiment, when the electrical locking apparatus 10 determines that the locking condition of the circuit breaker or the disconnector 20 is normal, the circuit breaker or the disconnector 20 can be controlled to perform the closing and opening actions through the control circuit 21. The circuit breaker or the isolating switch 20 according to this embodiment can determine whether each latching condition in the circuit breaker or the isolating switch 20 is normally closed through the electrical latching device 10, so that when any latching condition is abnormally closed, the checking efficiency of a worker is improved.
In summary, the present application performs electrical detection on the first latching switch 110, the second latching switch 210, the third latching switch 310 and the fourth latching switch 410 corresponding to the first relay 100, the second relay 200, the third relay 300 and the fourth relay 400 respectively, so as to determine whether each latching switch is normally closed. Meanwhile, when any one of the locking switches is abnormally closed, the relay corresponding to the locking switch which is abnormally closed outputs a fault signal to remind a worker, and the worker is prevented from checking each locking condition by using a universal meter potential measuring method, so that the checking efficiency is improved, and time and labor are saved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application. Therefore, the protection scope of the present patent application shall be subject to the appended claims.
Claims (10)
1. An electrical blocking device, for a circuit breaker or disconnector (20), comprising:
a first relay (100), wherein a first end of the first relay (100) is electrically connected with a negative bus (101) through a first latching switch (110) and is used for determining whether the first latching switch (110) is normally closed;
a second relay (200), wherein a first end of the second relay (200) is electrically connected with a second end of the first relay (100), a third end of the first relay (100) is electrically connected with the negative bus (101) through a second latching switch (210), and the second relay (200) is used for determining whether the second latching switch (210) is normally closed;
a third relay (300), wherein a first end of the third relay (300) is electrically connected with a second end of the second relay (200), a third end of the second relay (200) is electrically connected with the negative bus (101) through a third latching switch (310), and the third relay (300) is used for determining whether the third latching switch (310) is normally closed; and
a fourth relay (400), wherein a fourth end of the first relay (100), a fourth end of the second relay (200), a second end of the third relay (300) and a first end of the fourth relay (400) are all connected with a positive bus (102), a second end of the fourth relay (400) is electrically connected with a third end of the third relay (300), a fourth end of the third relay (300) is electrically connected with the negative bus (101) through a fourth latching switch (410), a third end of the fourth relay (400) is used for electrically connecting the circuit breaker or the isolating switch (20), a fourth end of the fourth relay (400) is used for electrically connecting a positive pole of a power supply (201), and the fourth relay (400) is used for determining whether the fourth latching switch (410) is normally closed;
wherein the first relay (100) comprises a first coil (111) and a first switch (112); the first end of the first relay (100) is the first end of the first coil (111), the second end of the first relay (100) is the second end of the first switch (112), the third end of the first relay (100) is the first end of the first switch (112), and the fourth end of the first relay (100) is the second end of the first coil (111); the second relay (200) comprises a second coil (211) and a second switch (212), and the first end of the second relay (200) is the first end of the second coil (211); the second end of the second relay (200) is the second end of the second switch (212), the third end of the second relay (200) is the first end of the second switch (212), and the fourth end of the second relay (200) is the second end of the second coil (211); the third relay (300) comprises a third coil (311) and a third switch (312), the first end of the third relay (300) is the first end of the third coil (311), and the second end of the third relay (300) is the second end of the third coil (311); the third end of the third relay (300) is the second end of the third switch (312), and the fourth end of the third relay (300) is the first end of the third switch (312); the fourth relay (400) comprises a fourth coil (411) and a fourth switch (412); the first end of the fourth relay (400) is the second end of the fourth coil (411), the second end of the fourth relay (400) is the first end of the fourth coil (411), the third end of the fourth relay (400) is the first end of the fourth switch (412), and the fourth end of the fourth relay (400) is the second end of the fourth switch (412).
2. An electric blocking device according to claim 1, characterized in that when the first blocking switch (110), the second blocking switch (210), the third blocking switch (310) and the fourth blocking switch (410) are normally closed, the circuit breaker or disconnector (20) is controlled to be normally opened or closed;
when any one of the first latching switch (110), the second latching switch (210), the third latching switch (310) and the fourth latching switch (410) is abnormally closed, the breaker or the isolating switch (20) cannot be controlled to normally open or close.
3. The electrical latching apparatus of claim 2, wherein when any one of the first latching switch (110), the second latching switch (210), the third latching switch (310), and the fourth latching switch (410) is abnormally closed, a relay corresponding to the abnormally closed latching switch outputs a fault signal.
4. An electrical latching apparatus according to claim 1, wherein the first relay (100), the second relay (200), the third relay (300) and the fourth relay (400) are all normally open relays.
5. The electrical latching device of claim 1,
the first switch (112) is closed when the first coil (111) is powered up, and the first switch (112) is open when the first coil (111) is powered down.
6. The electrical latching device of claim 1,
the second switch (212) is closed when the second coil (211) is powered up, and the second switch (212) is open when the second coil (211) is powered down.
7. The electrical latching device of claim 1,
the third switch (312) is closed when the third coil (311) is powered up, and the third switch (312) is open when the third coil (311) is powered down.
8. The electrical latching device of claim 1,
the fourth switch (412) is closed when the fourth coil (411) is powered up, and the fourth switch (412) is open when the fourth coil (411) is powered down.
9. An electric latching device according to any of claims 1-8, characterized in that the first relay (100), the second relay (200), the third relay (300) and the fourth relay (400) are all relays with indicator lights.
10. A circuit breaker or disconnector, characterized in that it comprises an electrical blocking device (10) according to any one of claims 1 to 8; and
and a control loop (21) electrically connected with the third end of the fourth relay (400).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010185753.XA CN111443281B (en) | 2020-03-17 | 2020-03-17 | Electrical blocking device and circuit breaker or isolating switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010185753.XA CN111443281B (en) | 2020-03-17 | 2020-03-17 | Electrical blocking device and circuit breaker or isolating switch |
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| CN112946463B (en) * | 2020-12-23 | 2023-04-07 | 华能伊敏煤电有限责任公司 | Device applied to switching characteristic test |
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