CN103531408B - Low-voltage circuit breaker automatic switching-on device and the method for automatic closing after no-voltage trip thereof - Google Patents

Low-voltage circuit breaker automatic switching-on device and the method for automatic closing after no-voltage trip thereof Download PDF

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Publication number
CN103531408B
CN103531408B CN201310516727.0A CN201310516727A CN103531408B CN 103531408 B CN103531408 B CN 103531408B CN 201310516727 A CN201310516727 A CN 201310516727A CN 103531408 B CN103531408 B CN 103531408B
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contact
circuit breaker
time relay
low
voltage circuit
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CN103531408A (en
Inventor
李小涛
郭东升
苗军
冯曰敏
韩永
张兴永
李亚洲
孟成
李蕾
张华芝
李唯娜
王毅
翟纯恒
刘刚
李小龙
刘鹏
刘凯
王玉琳
仲宁
曹瑜
张雅娣
魏剑萍
徐金华
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SHANDONG QILIN ELECTRIC POWER EQUIPMENT Co.,Ltd.
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李小涛
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Abstract

The invention provides a kind of low-voltage circuit breaker automatic switching-on device, belong to reclosing device field.Comprise low-voltage circuit breaker, be provided with the time relay, sliding contact is provided with in the time relay, stop contact and clockwork, sliding contact is positioned at the two ends of right angle connecting rod with stopping contact, and have its corresponding fixed contact respectively, sliding contact is driven by clockwork with termination contact, " 1 " number port of the time relay is connected respectively to the different leading-out terminal of step down side from " 13 " number port, between fuse and low-voltage circuit breaker, by " 17 " number port of the time relay and " 3 " number port short circuit, and " 16 " number port and " 4 " number port are parallel to low-voltage circuit breaker electric switch-on button two ends.Save manpower, close a floodgate rapidly, maintain corporate image preferably, structure is simple, convenient and easy.

Description

Low-voltage circuit breaker automatic switching-on device and the method for automatic closing after no-voltage trip thereof
Technical field
The invention provides a kind of low-voltage circuit breaker automatic switching-on device and the method for automatic closing after no-voltage trip thereof, belong to reclosing device field.
Background technology
In order to the safety and stability of operation of power networks, when preventing power system restoration from powering, electric equipment is produced and impact, when transformer drops into according to the requirement of " power system operation code ", need by its with load all disconnect, therefore the low-voltage circuit breaker of Circuit Fault on Secondary Transformer leading-out terminal all has the function of no-voltage trip, be when voltage is lower than rated voltage certain value, in low-voltage circuit breaker, no-voltage release can make low-voltage circuit breaker trip, after restoring electricity, by operation power personnel to on-the-spot combined floodgate low-voltage circuit breaker.If the low pressure trip device in dismounting low-voltage circuit breaker, then, when supply power voltage is too low, power consumption equipment cisco unity malfunction can be made, even damage.
The defect of this technology is at present: one, needs operation power personnel to close a floodgate to on-the-spot when power is restored, needs larger manpower; Its two, cannot no-voltage release be removed, make power system restoration power-on time very long; Its three, after restoring electricity, operation power personnel closing time is longer, cause complain more, affect corporate image.
Summary of the invention
The object of the invention is to provide a kind of low-voltage circuit breaker automatic switching-on device and the method for automatic closing after no-voltage trip thereof, saves manpower, closes a floodgate rapidly, maintains corporate image preferably, and structure is simple, convenient and easy.
Low-voltage circuit breaker automatic switching-on device of the present invention, comprise low-voltage circuit breaker, be provided with the time relay, sliding contact is provided with in the time relay, stop contact and clockwork, sliding contact is positioned at the two ends of right angle connecting rod with stopping contact, and have its corresponding fixed contact respectively, sliding contact is driven by clockwork with termination contact, " 1 " number port of the time relay is connected respectively to the different leading-out terminal of step down side from " 13 " number port, between fuse and low-voltage circuit breaker, by " 17 " number port of the time relay and " 3 " number port short circuit, and " 16 " number port and " 4 " number port are parallel to low-voltage circuit breaker electric switch-on button two ends.
Described low-voltage circuit breaker automatic switching-on device, make use of clockwork drives sliding contact to its corresponding fixed contact motion, when sliding contact moves to its corresponding fixed contact, separate again after of short duration contact, send pulse enable signal electric switch-on mechanism action, low-voltage circuit breaker closes a floodgate, " 1 " number port of the time relay is connected on live wire, between low-voltage circuit breaker and fuse, eliminate the link of incoming call checkout equipment, can make the time relay after power system recovery is powered, the very first time restores electricity, and the time relay that overcurrent can be avoided to cause burns, and sliding contact fixed contact corresponding to it be of short duration contact and separate after, also can move a segment distance, until stop stopping after contact fixed contact corresponding to it contacts, at this moment the distance between its corresponding fixed contact of sliding contact can avoid arc through air, very reliable, overall mechanical framework, its reliability of operation is also better than the Single Chip Microcomputer (SCM) system of the complexity that can realize this function far away, and cost is well below single shot reclosing device.
Described low-voltage circuit breaker automatic switching-on device, external divider resistance between " 13 " number port of the time relay and " 15 " port.Make solenoid iron core adhesive armature after the switch, instantaneous normally-closed contact is disconnected, divider resistance seals in loop, because electric power system is not stopped power supply, the time relay just has power supply supply always, the divider resistance supporting with the time relay of time relay manufacturer production is sealed in loop, solenoid can not be burnt in long-time conducting.
Described low-voltage circuit breaker automatic switching-on device, time relay delay length is 10 seconds to 15 seconds, and sliding contact fixed contact corresponding to it time of contact is 2 seconds to 4 seconds.The time delay of 10 seconds to 15 seconds can effectively avoid shoving on circuit, prevent the damage of electric equipment, the time of contact of 2 seconds to 4 seconds avoids motor drive mechanism insensitive equipment combined floodgate failure or is failure to actuate, and when also can not make to need separating brake, sending sub-gate signal cannot separating brake.
Described low-voltage circuit breaker automatic switching-on device, the time relay is DS-28 type exchange time relay.The DS-28 type time relay is AC relay, avoids the use of rectifier, system is formed more simple, reliable.
The method for automatic closing after no-voltage trip of described low-voltage circuit breaker automatic switching-on device, described method is: the time relay power input with sliding contact is connected respectively to the different leading-out terminal of step down side from power output end, between fuse and low-voltage circuit breaker, the time relay is directly powered by transmission line, the switches set that corresponding with it to instantaneous normally opened contact and sliding contact fixed contact forms is connected, and be parallel to the two ends of low-voltage circuit breaker electric switch-on button, its operation principle is divided into following three kinds of states:
State 1: when circuit is in power down mode, the time relay is in the normal state, two moving contacts are provided with in the time relay, i.e. sliding contact and termination contact, sliding contact is positioned at initial position with termination contact, fixed contact corresponding to it disconnects respectively, and the instantaneous normally-closed contact of the time relay closes, and the instantaneous normally opened contact of the time relay disconnects.
State 2: when circuit restores electricity, after transformer primary side closes a floodgate, Circuit Fault on Secondary Transformer leading-out terminal is charged, at this moment the time relay also restores electricity, solenoid is provided with in the time relay, after solenoid energising, make iron core adhesive armature, instantaneous normally-closed contact is disconnected, the port at instantaneous normally-closed contact two ends is connected with divider resistance, after instantaneous normally-closed contact disconnects, divider resistance seals in solenoid loop, instantaneous normally opened contact closes, clockwork is provided with in the time relay, sliding contact starts to rotate clockwise under the drive of clockwork with termination contact, sliding contact and stop contact simultaneously and keep synchronized moving to its corresponding fixed contact, after the time set, sliding contact and termination contact short time disconnect after connecting again, when the short time connects, the time relay can send to low-voltage circuit breaker motor drive mechanism the pulse that a duration is 2 seconds to 4 seconds, after motor drive mechanism receives pulse signal, low-voltage circuit breaker action, combined floodgate is become from separating brake, after the sliding contact fixed contact short time corresponding to it connect and disconnect again, motion can be continued with termination contact, contact until stop contact fixed contact corresponding to it, namely position of rest is moved to, sliding contact and the stop motion simultaneously of termination contact, and remain on position of rest, disconnect after making the of short duration contact of its corresponding fixed contact of sliding contact, and stop after continuing motion certain distance, prevent low-voltage circuit breaker from receiving switching signal all the time, when needs separating brake, sending sub-gate signal cannot separating brake, also prevent because sliding contact fixed contact hypotelorism corresponding to it causes electric current to puncture air, low-voltage circuit breaker is made to receive switching signal all the time, and low-voltage circuit breaker closes after restoring electricity after time delay again, effectively avoid shoving on power circuit.
State 3: when circuit has a power failure again, the time relay loses electric current and voltage, solenoid dead electricity, iron core separates with armature, instantaneous normally-closed contact is become closed from disconnection, instantaneous normally opened contact becomes disconnection from closed, restoring spring is provided with in the time relay, sliding contact is grouped into initial position with termination contact next time in the driving of restoring spring, because instantaneous normally opened contact becomes disconnection from closed, make sliding contact when the driving of restoring spring is grouped into that in initial position process, fixed contact corresponding to it contacts again next time, low-voltage circuit breaker will be caused to close a floodgate because there is induced current in circuit.
Described low-voltage circuit breaker automatic switching-on device is for the method for automatic closing after no-voltage trip, and entirety uses mechanical part, very reliably, and structure is simple, be easy to realize, cost is low, under the environment of electric current and spread of voltage, impact resistance is better than electronic unit far away.
The beneficial effect that the present invention is compared with prior art brought is:
Low-voltage circuit breaker automatic switching-on device of the present invention, make use of clockwork drives sliding contact to its corresponding fixed contact motion, when sliding contact moves to its corresponding fixed contact, separate again after of short duration contact, send pulse enable signal electric switch-on mechanism action, low-voltage circuit breaker closes a floodgate, " 1 " number port of the time relay is connected respectively to the different leading-out terminal of step down side from " 13 " number port, between fuse and low-voltage circuit breaker, eliminate the link of incoming call checkout equipment, can make the time relay after power system recovery is powered, the very first time restores electricity, and the time relay that overcurrent can be avoided to cause burns, and sliding contact fixed contact corresponding to it be of short duration contact and separate after, also can move a segment distance, until stop stopping after contact fixed contact corresponding to it contacts, at this moment the distance between its corresponding fixed contact of sliding contact can avoid arc through air, very reliable, overall mechanical framework, its reliability of operation is also better than the Single Chip Microcomputer (SCM) system of the complexity that can realize this function far away, and cost is well below single shot reclosing device.
Solenoid is iron core adhesive armature after the switch, instantaneous normally-closed contact is disconnected, divider resistance seals in loop, because electric power system is not stopped power supply, the time relay just has power supply supply always, the divider resistance supporting with the time relay of time relay manufacturer production is sealed in loop, solenoid can not be burnt in long-time conducting.
Time relay time delay can effectively avoid shoving on circuit in 10 seconds to 15 seconds, prevent the damage of electric equipment, the time of contact of 2 seconds to 4 seconds avoids motor drive mechanism insensitive equipment combined floodgate failure or is failure to actuate, and when also can not make to need separating brake, sending sub-gate signal cannot separating brake.
Described low-voltage circuit breaker automatic switching-on device is for the method for automatic closing after no-voltage trip, and entirety uses mechanical part, very reliably, and structure is simple, be easy to realize, cost is low, under the environment of electric current and spread of voltage, impact resistance is better than electronic unit far away.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention structural representation;
Fig. 2 is sliding contact of the present invention and termination contact fundamental diagram.
In figure: 1, " 1 " number port; 2, " 3 " number port; 3, " 4 " number port; 4, " 13 " number port; 5, " 15 " number port; 6, " 16 " number port; 7, " 17 " number port; 8, fuse; 9, low-voltage circuit breaker; 10, the time relay; 11, sliding contact; 12, contact is stopped; 13, fixed contact; 14, instantaneous normally-closed contact; 15, instantaneous normally opened contact; 16, divider resistance.
Embodiment
Below in conjunction with the present invention, low-voltage circuit breaker automatic switching-on device embodiment is described further:
Embodiment 1: as depicted in figs. 1 and 2, low-voltage circuit breaker automatic switching-on device of the present invention, comprise low-voltage circuit breaker 9, be provided with DS-28 type exchange time relay 10, sliding contact 11 is provided with in the time relay 10, stop contact 12 and clockwork, sliding contact 11 is positioned at the two ends of right angle connecting rod with stopping contact 12, and have its corresponding fixed contact 13 respectively, sliding contact 11 is driven by clockwork with termination contact 12, it is 15 seconds that clockwork arranges time delay, sliding contact 11 fixed contact 13 corresponding to it time of contact is 4 seconds, " 1 " number port one of the time relay 10 is connected respectively to the different leading-out terminal of step down side from " 13 " number port 4, between fuse 8 and low-voltage circuit breaker 9, by " 17 " number port 7 of the time relay 10 and " 3 " number port 2 short circuit, and " 16 " number port 6 and " 4 " number port 3 are parallel to low-voltage circuit breaker 9 electric switch-on button two ends.Wherein the time relay 10 is inner, connect with instantaneous normally-closed contact 14 for solenoid between " 1 " number port one with " 13 " number port 4, " 15 " number port 5 and " 13 " number port 4 are parallel relationship, being instantaneous normally opened contact 15 between " 16 " number port 6 and " 17 " number port 7, is its corresponding fixed contact 13 of sliding contact 11 between " 3 " number port 2 and " 4 " number port 3.
Embodiment 2: on the architecture basics of embodiment 1, external divider resistance 16 between " 13 " number port 4 of the time relay 10 and " 15 " number port 5.
After being used for no-voltage trip below in conjunction with the present invention to low-voltage circuit breaker automatic switching-on device, the method for automatic closing is described further:
As depicted in figs. 1 and 2, the method for automatic closing after no-voltage trip of low-voltage circuit breaker automatic switching-on device of the present invention, described method is: the time relay 10 power input with sliding contact 11 is connected respectively to the different leading-out terminal of step down side from power output end, between fuse 8 and low-voltage circuit breaker 9, the time relay 10 is directly powered by transmission line, the switches set that corresponding with it to sliding contact 11 for instantaneous normally opened contact 15 fixed contact 13 forms is connected, and be parallel to the two ends of low-voltage circuit breaker 9 electric switch-on button, its operation principle is divided into following three kinds of states:
State 1: when circuit is in power down mode, the time relay 10 is in the normal state, two moving contacts are provided with in the time relay 10, i.e. sliding contact 11 and termination contact 12, sliding contact 11 is positioned at initial position with termination contact 12, fixed contact 13 corresponding to it disconnects respectively, and the instantaneous normally-closed contact 14 of the time relay 10 closes, and the instantaneous normally opened contact 15 of the time relay 10 disconnects.
State 2: when circuit restores electricity, after transformer primary side closes a floodgate, Circuit Fault on Secondary Transformer leading-out terminal is charged, at this moment the time relay 10 also restores electricity, solenoid is provided with in the time relay 10, after solenoid energising, make iron core adhesive armature, instantaneous normally-closed contact 14 is disconnected, the port at instantaneous normally-closed contact 14 two ends is connected with divider resistance 16, after instantaneous normally-closed contact 14 disconnects, divider resistance 16 seals in solenoid loop, instantaneous normally opened contact 15 closes, clockwork is provided with in the time relay 10, sliding contact 11 starts to rotate clockwise under the drive of clockwork with termination contact 12, sliding contact 11 and stop contact 12 simultaneously and keep synchronized moving to its corresponding fixed contact 13, after the time set, sliding contact 11 and termination contact 12 short time disconnect after connecting again, when the short time connects, the time relay 10 can send to low-voltage circuit breaker 9 motor drive mechanism the pulse that a duration is 2 seconds to 4 seconds, after motor drive mechanism receives pulse signal, low-voltage circuit breaker 9 action, combined floodgate is become from separating brake, after sliding contact 11 fixed contact 13 short time corresponding to it connect and disconnect again, motion can be continued with termination contact 12, contact until stop contact 12 fixed contact 13 corresponding to it, namely position of rest is moved to, sliding contact 11 and the stop motion simultaneously of termination contact 12, and remain on position of rest, disconnect after making the of short duration contact of its corresponding fixed contact of sliding contact 11 13, and stop after continuing motion certain distance, prevent low-voltage circuit breaker 9 from receiving switching signal all the time, when needs separating brake, sending sub-gate signal cannot separating brake, also prevent because sliding contact 11 fixed contact 13 corresponding to it hypotelorism causes electric current to puncture air, low-voltage circuit breaker 9 is made to receive switching signal all the time, and low-voltage circuit breaker 9 closes after restoring electricity after time delay again, effectively avoid shoving on power circuit.
State 3: when circuit has a power failure again, the time relay 10 loses electric current and voltage, solenoid dead electricity, iron core separates with armature, instantaneous normally-closed contact 14 is become closed from disconnection, instantaneous normally opened contact 15 becomes disconnection from closed, restoring spring is provided with in the time relay 10, sliding contact 11 is grouped into initial position with termination contact 12 next time in the driving of restoring spring, because instantaneous normally opened contact 15 becomes disconnection from closed, make sliding contact 11 when the driving of restoring spring is grouped into that in initial position process, fixed contact 13 corresponding to it contacts again next time, will low-voltage circuit breaker 9 be caused to close a floodgate because there is induced current in circuit.
Described low-voltage circuit breaker automatic switching-on device is for the method for automatic closing after no-voltage trip, overall use mechanical part, very reliable, and structure is simple, be easy to realize, cost is low, under the environment of electric current and spread of voltage, impact resistance is better than electronic unit far away, ensure that Circuit Fault on Secondary Transformer can automatic closing after restoring electricity, reduces the workload of manpower and 95598 service platforms greatly.
Operation principle and operating procedure
As depicted in figs. 1 and 2, the method for automatic closing after no-voltage trip of low-voltage circuit breaker automatic switching-on device of the present invention, described method is: the time relay 10 power input with sliding contact 11 is connected respectively to the different leading-out terminal of step down side from power output end, between fuse 8 and low-voltage circuit breaker 9, the time relay 10 is directly powered by transmission line, the switches set that corresponding with it to sliding contact 11 for instantaneous normally opened contact 15 fixed contact 13 forms is connected, and be parallel to the two ends of low-voltage circuit breaker 9 electric switch-on button, its operation principle is divided into following three kinds of states:
State 1: when circuit is in power down mode, the time relay 10 is in the normal state, two moving contacts are provided with in the time relay 10, i.e. sliding contact 11 and termination contact 12, sliding contact 11 is positioned at initial position with termination contact 12, fixed contact 13 corresponding to it disconnects respectively, and the instantaneous normally-closed contact 14 of the time relay 10 closes, and the instantaneous normally opened contact 15 of the time relay 10 disconnects.
State 2: when circuit restores electricity, after transformer primary side closes a floodgate, Circuit Fault on Secondary Transformer leading-out terminal is charged, at this moment the time relay 10 also restores electricity, solenoid is provided with in the time relay 10, after solenoid energising, make iron core adhesive armature, instantaneous normally-closed contact 14 is disconnected, the port at instantaneous normally-closed contact 14 two ends is connected with divider resistance 16, after instantaneous normally-closed contact 14 disconnects, divider resistance 16 seals in solenoid loop, instantaneous normally opened contact 15 closes, clockwork is provided with in the time relay 10, sliding contact 11 starts to rotate clockwise under the drive of clockwork with termination contact 12, sliding contact 11 and stop contact 12 simultaneously and keep synchronized moving to its corresponding fixed contact 13, after the time set, sliding contact 11 and termination contact 12 short time disconnect after connecting again, when the short time connects, the time relay 10 can send to low-voltage circuit breaker 9 motor drive mechanism the pulse that a duration is 2 seconds to 4 seconds, after motor drive mechanism receives pulse signal, low-voltage circuit breaker 9 action, combined floodgate is become from separating brake, after sliding contact 11 fixed contact 13 short time corresponding to it connect and disconnect again, motion can be continued with termination contact 12, contact until stop contact 12 fixed contact 13 corresponding to it, namely position of rest is moved to, sliding contact 11 and the stop motion simultaneously of termination contact 12, and remain on position of rest, disconnect after making the of short duration contact of its corresponding fixed contact of sliding contact 11 13, and stop after continuing motion certain distance, prevent low-voltage circuit breaker 9 from receiving switching signal all the time, when needs separating brake, sending sub-gate signal cannot separating brake, also prevent because sliding contact 11 fixed contact 13 corresponding to it hypotelorism causes electric current to puncture air, low-voltage circuit breaker 9 is made to receive switching signal all the time, and low-voltage circuit breaker 9 closes after restoring electricity after time delay again, effectively avoid shoving on power circuit.
State 3: when circuit has a power failure again, the time relay 10 loses electric current and voltage, solenoid dead electricity, iron core separates with armature, instantaneous normally-closed contact 14 is become closed from disconnection, instantaneous normally opened contact 15 becomes disconnection from closed, restoring spring is provided with in the time relay 10, sliding contact 11 is grouped into initial position with termination contact 12 next time in the driving of restoring spring, because instantaneous normally opened contact 15 becomes disconnection from closed, make sliding contact 11 when the driving of restoring spring is grouped into that in initial position process, fixed contact 13 corresponding to it contacts again next time, will low-voltage circuit breaker 9 be caused to close a floodgate because there is induced current in circuit.
Described low-voltage circuit breaker automatic switching-on device is for the method for automatic closing after no-voltage trip, overall use mechanical part, very reliable, and structure is simple, be easy to realize, cost is low, under the environment of electric current and spread of voltage, impact resistance is better than electronic unit far away, ensure that Circuit Fault on Secondary Transformer can automatic closing after restoring electricity, reduces the workload of manpower and 95598 service platforms greatly.

Claims (4)

1. a low-voltage circuit breaker automatic switching-on device is used for the method for automatic closing after no-voltage trip, it is characterized in that, low-voltage circuit breaker automatic switching-on device comprises low-voltage circuit breaker, be provided with the time relay (10), sliding contact (11) is provided with in the time relay (10), stop contact (12) and clockwork, sliding contact (11) is positioned at the two ends of right angle connecting rod with stopping contact (12), and have its corresponding fixed contact (13) respectively, sliding contact (11) is driven by clockwork with termination contact (12), " 1 " number port (1) of the time relay (10) is connected respectively to the different leading-out terminal of step down side from " 13 " number port (4), between fuse (8) and low-voltage circuit breaker (9), by " 17 " number port (7) of the time relay (10) and " 3 " number port (2) short circuit, and " 16 " number port (6) and " 4 " number port (3) are parallel to low-voltage circuit breaker (9) electric switch-on button two ends,
Described method is: the time relay (10) power input with sliding contact (11) is connected respectively to the different leading-out terminal of step down side from power output end, between fuse (8) and low-voltage circuit breaker (9), the time relay (10) is directly powered by transmission line, the switches set that corresponding with it to sliding contact (11) for instantaneous normally opened contact (15) fixed contact (13) forms is connected, and be parallel to the two ends of low-voltage circuit breaker (9) electric switch-on button, its operation principle is divided into following three kinds of states:
State 1: when circuit is in power down mode, the time relay (10) is in the normal state, two moving contacts are provided with in the time relay (10), i.e. sliding contact (11) and termination contact (12), sliding contact (11) is positioned at initial position with termination contact (12), fixed contact (13) corresponding to it disconnects respectively, the time relay (10) instantaneous normally-closed contact (14) closes, and the time relay (10) instantaneous normally opened contact (15) disconnects;
State 2: when circuit restores electricity, after transformer primary side closes a floodgate, Circuit Fault on Secondary Transformer leading-out terminal is charged, at this moment the time relay (10) also restores electricity, the time relay is provided with solenoid in (10), after solenoid energising, make iron core adhesive armature, instantaneous normally-closed contact (14) is disconnected, the port at instantaneous normally-closed contact (14) two ends is connected with divider resistance (16), after instantaneous normally-closed contact (14) disconnects, divider resistance (16) seals in solenoid loop, instantaneous normally opened contact (15) closes, the time relay is provided with clockwork in (10), sliding contact (11) starts to rotate clockwise under the drive of clockwork with termination contact (12), sliding contact (11) and stop contact (12) simultaneously and keep synchronized moving to its corresponding fixed contact (13), after the time set, sliding contact (11) and termination contact (12) short time disconnect after connecting again, when the short time connects, the time relay (10) can send to low-voltage circuit breaker (9) motor drive mechanism the pulse that a duration is 2 seconds to 4 seconds, after motor drive mechanism receives pulse signal, low-voltage circuit breaker (9) action, combined floodgate is become from separating brake, after sliding contact (11) fixed contact (13) short time corresponding to it connect and disconnect again, motion can be continued with termination contact (12), contact until stop contact (12) fixed contact corresponding to it (13), namely position of rest is moved to, sliding contact (11) and termination contact (12) stop motion simultaneously, and remain on position of rest, disconnect after making sliding contact (11) its corresponding fixed contact (13) of short duration contact, and stop after continuing motion certain distance, prevent low-voltage circuit breaker (9) from receiving switching signal all the time, when needs separating brake, sending sub-gate signal cannot separating brake, also prevent because sliding contact (11) fixed contact (13) corresponding to it hypotelorism causes electric current to puncture air, low-voltage circuit breaker (9) is made to receive switching signal all the time, and low-voltage circuit breaker (9) closes after restoring electricity after time delay again, effectively avoid shoving on power circuit,
State 3: when circuit has a power failure again, the time relay (10) loses electric current and voltage, solenoid dead electricity, iron core separates with armature, instantaneous normally-closed contact (14) is become closed from disconnection, instantaneous normally opened contact (15) becomes disconnection from closed, the time relay is provided with restoring spring in (10), sliding contact (11) is grouped into initial position with termination contact (12) next time in the driving of restoring spring, because instantaneous normally opened contact (15) becomes disconnection from closed, make sliding contact (11) when the driving of restoring spring is grouped into that in initial position process, fixed contact (13) corresponding to it contacts again next time, low-voltage circuit breaker (9) can not be caused to close a floodgate because there is induced current in circuit.
2. low-voltage circuit breaker automatic switching-on device is used for the method for automatic closing after no-voltage trip according to claim 1, it is characterized in that, external divider resistance (16) between " 13 " number port (4) of the time relay (10) and " 15 " port (5).
3. low-voltage circuit breaker automatic switching-on device is used for the method for automatic closing after no-voltage trip according to claim 1, it is characterized in that, the time relay (10) delay length is 10 seconds to 15 seconds, and sliding contact (11) fixed contact (13) corresponding to it time of contact is 2 seconds to 4 seconds.
4. low-voltage circuit breaker automatic switching-on device is for the method for automatic closing after no-voltage trip according to claim 1, and it is characterized in that, the time relay (10) is DS-28 type exchange time relay.
CN201310516727.0A 2013-10-28 2013-10-28 Low-voltage circuit breaker automatic switching-on device and the method for automatic closing after no-voltage trip thereof Active CN103531408B (en)

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