CN203895955U - Neutral-line-shortage and neutral-line-breakage automatic protecting device - Google Patents
Neutral-line-shortage and neutral-line-breakage automatic protecting device Download PDFInfo
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- CN203895955U CN203895955U CN201420286517.7U CN201420286517U CN203895955U CN 203895955 U CN203895955 U CN 203895955U CN 201420286517 U CN201420286517 U CN 201420286517U CN 203895955 U CN203895955 U CN 203895955U
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- line
- zero
- circuit breaker
- neutral
- shunt
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- 230000001681 protective effect Effects 0.000 claims description 18
- 238000012360 testing method Methods 0.000 claims description 13
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical group [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052744 lithium Inorganic materials 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000001012 protector Effects 0.000 abstract 1
- 230000007935 neutral effect Effects 0.000 description 5
- 206010014357 Electric shock Diseases 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Abstract
The utility model discloses a neutral-line-shortage and neutral-line-breakage automatic protecting device which belongs to the technical field of electrical protecting device. The neutral-line-shortage and neutral-line-breakage automatic protecting device comprises a control part circuit and a detecting part circuit. The control part circuit comprises a shunt circuit breaker and auxiliary contacts of a relay. The detecting part circuit comprises a relay KC, and further comprises a stopping button SB1 of the shunt circuit breaker QF and an electric leakage protector RCD. The neutral-line-shortage and neutral-line-breakage automatic protecting device further comprises an alarm part circuit which is composed of a power supply E, a break auxiliary contact QF3 of the shunt circuit breaker QF, an alarm R and a switch K. The neutral-line-shortage and neutral-line-breakage automatic protecting device has advantages of: simple structure, convenient use, high safety, high intelligent degree, high versatility, low cost, basically no requirement for maintenance, and high convenience in field circuit changing or connection. The neutral-line-shortage and neutral-line-breakage automatic protecting device is particularly suitable for use on a three-phase four-wire transformer and three-phase four-wire electrical equipment.
Description
Technical field
The utility model belongs to electric protection device technical field.
Background technology
At present, because all situations and reason cause lighting transformer zero line to blow fault, as zero line in batch meter in JP cabinet blows, step down side zero line blows etc., can bring extremely serious consequence after causing this situation.Because the imbalance of load will be brought the imbalance of three-phase voltage, once if neutral line break, the imbalance of three-phase load voltage serious unbalance more, electric equipment operating characteristic is changed, brownout equipment cannot be worked, overtension shortens equipment life, cause a lot of users to burn out power consumption equipment, even can cause fire, cause serious economic loss to user, bring unnecessary Claims Resolution responsibility and economic loss to power supply enterprise, had a strong impact on the brand image of power supply enterprise simultaneously.Once and neutral line break; adopt the electric equipment of protection connecting to neutral will lose protective effect, once equipment electric leakage will cause the person to get an electric shock, even equipment leakproof at this moment; because zero line itself makes device housings charged with dangerous voltage, can cause equally accident of human electric shock.
According to neutral line break in three-phase four-wire low-voltage distribution system; neutral point potential shift causes that overvoltage causes the actual conditions of a lot of accidents; we need to research and develop, and a kind of zero line of being convenient to make lacks, burn out detection protective device, to ensure the Electrical Safety of low-voltage distribution system.
Utility model content
Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art, provides a kind of and lacks zero, automatic safety device off zero, and it is simple in structure, easy to use, high safety, intelligent degree is high, highly versatile, with low cost, substantially without maintenance, field modification or connecting circuit are convenient; Be particularly useful for using on three-phase and four-line transformer (as lighting transformer) and three-phase and four-line power consumption equipment.
For solving the problems of the technologies described above, technical solution adopted in the utility model is:
A kind of lack zero, automatic safety device off zero, comprise control section circuit and test section circuit, wherein:
Described control section circuit comprises auxiliary contact KC1, the KC2 of shunt circuit breaker QF and relay K C, and described shunt circuit breaker QF is provided with shunt opening coil F1 and 1 above auxiliary contact; The dynamic circuit connector auxiliary contact I QF1 of described shunt circuit breaker QF is connected with the A phase line of three phase mains, the other end successively warp is connected with dynamic circuit breaker auxiliary contact I KC1 and the shunt opening coil F1 of relay K C, and then is connected with three-phase power line B phase line through the dynamic circuit breaker auxiliary contact II KC2 of relay K C and the dynamic circuit connector auxiliary contact II QF2 of shunt circuit breaker QF;
Described test section circuit comprises relay K C, and the coil two ends of described relay K C are connected with the C phase line of zero line N and three phase mains respectively.
Described test section circuit also comprises the stop button SB1 of shunt circuit breaker QF, and described stop button SB1 one end is connected with the C phase line of three phase mains, and the other end joins by coil and the zero line N of relay K C.
Described test section circuit also comprises earth leakage protective device RCD, and described stop button SB1 one end is connected with the C phase line of three phase mains, and the other end joins through earth leakage protective device RCD and zero line, and the coil two ends of relay K C join with earth leakage protective device RCD and zero line N respectively.
Also comprise warning partial circuit, described warning partial circuit comprises dynamic circuit breaker auxiliary contact QF3, alarm R and the K switch of power supply E, the shunt circuit breaker QF of electrical connection successively.
Described power supply E is lithium battery.
Described alarm R is buzzer siren.
Described shunt circuit breaker QF is RKM1-400S/3340 model, CM1-400S/3340 model or the RMM1-100H/3340 model air switch that originates from group of Shanghai People's appliance switch factory.
The beneficial effect that adopts technique scheme to produce is: the utility model is simple in structure, easy to use, high safety, intelligent degree is high, highly versatile, with low cost, substantially without maintenance, field modification or connecting circuit are convenient, are particularly useful for using on three-phase and four-line transformer (as lighting transformer) and three-phase and four-line power consumption equipment; Comprise control section circuit and test section circuit, circuit is simple and reliable; Test section circuit also comprises stop button, effectively verifies the reliable on off of shunt circuit breaker main contacts, and earth leakage protective device, prevents the accident of human electric shock that equipment leakage causes; Also comprise warning partial circuit, high safety, intelligent degree is high, realizes and alarm, is convenient to the O&M personnel very first time to find scarce zero, accident off zero; Power supply E is lithium battery, long service life, and capacity is large, high temperature resistant, and volume is little, lightweight, safety and environmental protection; Alarm is buzzer siren, and warning successful is simple to operate; Described shunt circuit breaker QF is RKM1-400S/3340 model, CM1-400S/3340 model or the RMM1-100H/3340 model air switch that originates from group of Shanghai People's appliance switch factory, and element is easy to get, with low cost, stable performance.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is the utility model embodiment circuit theory diagrams.
Fig. 2 is the structural representation of shunt circuit breaker QF in Fig. 1.
QF, shunt circuit breaker, KC, relay, QF1, shunt circuit breaker QF dynamic circuit connector auxiliary contact I, KC1, relay K C dynamic circuit breaker auxiliary contact I, F1, shunt opening coil, KC2, relay K C dynamic circuit breaker auxiliary contact II, QF2, shunt circuit breaker QF dynamic circuit connector auxiliary contact II, SB1, stop button, RCD, earth leakage protective device, E, power supply, QF3, shunt circuit breaker QF dynamic circuit breaker auxiliary contact, R, alarm, K, switch, 1, main contacts, 2, free tripping mechanism, 3, overcurrent trip, 4, shunt opening coil trip, 5, thermal overload release, 6, under-voltage release.
Embodiment
Referring to Fig. 1 and Fig. 2, a kind of lack zero, automatic safety device off zero, comprise control section circuit and test section circuit, circuit is simple, and intelligent degree is high, wherein:
Described control section circuit comprises auxiliary contact KC1, the KC2 of shunt circuit breaker QF and relay K C, described shunt circuit breaker QF selects the RKM1-400S/3340 model air switch (also can be the circuit breaker of other model band shunt opening coils and auxiliary contact) that originates from group of Shanghai People's appliance switch factory, element is easy to get, with low cost, stable performance, it is provided with shunt opening coil F1 and 3 auxiliary contact QF1, QF2 and QF3; The dynamic circuit connector auxiliary contact I QF1 of described shunt circuit breaker QF is connected with the A phase line of three phase mains, the other end successively warp is connected with dynamic circuit breaker auxiliary contact I KC1 and the shunt opening coil F1 of relay K C, and then is connected with three-phase power line B phase line through the dynamic circuit breaker auxiliary contact II KC2 of relay K C and the dynamic circuit connector auxiliary contact II QF2 of shunt circuit breaker QF.
Described test section circuit comprises a relay K C, for the reliable on off of splicing thread road Personal Safety and checking shunt circuit breaker QF main contacts 1, also be provided with the stop button SB1 of an earth leakage protective device RCD and shunt circuit breaker QF, relay K C, earth leakage protective device RCD with stop button SB1 three annexation are: described stop button SB1 one end is connected with the C phase line of three phase mains, the other end joins through earth leakage protective device RCD and zero line, and the coil two ends of relay K C join with earth leakage protective device RCD and zero line N respectively; Can stop button SB1 be positioned on the panel of shunt circuit breaker QF, normally disconnect main contacts 1 for detection of shunt circuit breaker QF, plays test effect; And under earth leakage protective device RCD, connect multiple shunt air switches, in the time of the relevant equipment generation electric leakage accident of shunt air switch, earth leakage protective device RCD action, prevents personal Danger Electric shock risk, improves electrical safety.
In order to make the O&M personnel very first time know that power consumption equipment lacks zero, the generation of fault off zero, also be provided with a warning partial circuit, described warning partial circuit comprises dynamic circuit breaker auxiliary contact QF3, alarm R and the K switch of power supply E, the shunt circuit breaker QF of electrical connection successively, power supply E is lithium battery, long service life, capacity are large, high temperature resistant, and volume is little, lightweight, safety and environmental protection; Alarm R is buzzer siren, and warning successful is simple to operate, is convenient to O&M personnel rapid-maintenance.
Auxiliary contact QF1, the QF2 of shunt circuit breaker QF and QF3 draw and are moulding shell outside, and the joint of shunt opening coil trip 4 can be drawn from inside or at back panel wiring again, easy-to-connect.
In the time that there is electricity shunt circuit breaker QF upper end, earth leakage protective device RCD normally works.Voltage 220V power supply is delivered to the coil of relay K C, and normally closed interlock KC1, the KC2 of relay K C disconnects.When shunt circuit breaker QF closes a floodgate, its normally open contact QF1, QF2 closure, but now normally closed interlock KC1, the KC2 of relay K C disconnect, the still power-off of shunt opening coil F1 of shunt circuit breaker QF.In the time that zero line disconnects, relay K C coil makes the normally open contact closure of relay K C because of decompression, the shunt opening coil F1 of shunt circuit breaker QF thus electric, the armature of shunt circuit breaker QF drives free tripping mechanism 2 to move, making main contacts 1 disconnect protection equipment below can not be burnt, QF1 and QF2 also disconnect simultaneously, and protection shunt opening coil F1 is not burnt; When shunt circuit breaker QF main contacts 1 disconnects, the dynamic circuit breaker auxiliary contact QF3 closure of shunt circuit breaker QF, connects alarm R warnings of blowing a whistle, and reminds staff's circuit to occur scarce zero or fault off zero, alarm R stop alarm after staff pulls open K switch.
Shunt opening coil trip 4 is in the time of normal work, and its shunt opening coil F1 is power-off, and when shunt opening coil F1 energising, armature drives free tripping mechanism 2 to move, and main contacts 1 is disconnected.Shunt opening coil trip 4 is a kind of releases with voltage source excitation, and is short time duty, and shunt opening coil F1 generally can not exceed 1S conduction time, otherwise can be burnt.For preventing that shunt opening coil F1 from burning, when shunt circuit breaker QF main contact disconnects, its dynamic circuit connector auxiliary contact QF1, QF2 also disconnects simultaneously, and shunt opening coil F1 power-off is not burnt, effectively protective device.
This is the wherein connection of a way switch, and all the other each branch switches connect according to this annexation, do not repeat one by one.
This application of installation is in lighting transformer, respond well, also can be widely used on each three-phase and four-line power consumption equipment and other field transformers, has higher application value.
Claims (7)
- Lack zero, an automatic safety device off zero, it is characterized in that, comprise control section circuit and test section circuit, wherein:Described control section circuit comprises auxiliary contact KC1, the KC2 of shunt circuit breaker QF and relay K C, and described shunt circuit breaker QF is provided with shunt opening coil F1 and 1 above auxiliary contact; The dynamic circuit connector auxiliary contact I QF1 of described shunt circuit breaker QF is connected with the A phase line of three phase mains, the other end successively warp is connected with dynamic circuit breaker auxiliary contact I KC1 and the shunt opening coil F1 of relay K C, and then is connected with three-phase power line B phase line through the dynamic circuit breaker auxiliary contact II KC2 of relay K C and the dynamic circuit connector auxiliary contact II QF2 of shunt circuit breaker QF;Described test section circuit comprises relay K C, and the coil two ends of described relay K C are connected with the C phase line of zero line N and three phase mains respectively.
- According to claim 1 lack zero, automatic safety device off zero; it is characterized in that; described test section circuit also comprises the stop button SB1 of shunt circuit breaker QF; described stop button SB1 one end is connected with the C phase line of three phase mains, and the other end joins by coil and the zero line N of relay K C.
- According to claim 2 lack zero, automatic safety device off zero; it is characterized in that; described test section circuit also comprises earth leakage protective device RCD; described stop button SB1 one end is connected with the C phase line of three phase mains; the other end joins through earth leakage protective device RCD and zero line, and the coil two ends of relay K C join with earth leakage protective device RCD and zero line N respectively.
- According to described in claim 1,2 or 3 lack zero, automatic safety device off zero; characterized by further comprising warning partial circuit, described warning partial circuit comprises dynamic circuit breaker auxiliary contact QF3, alarm R and the K switch of power supply E, the shunt circuit breaker QF of electrical connection successively.
- According to claim 4 lack zero, automatic safety device off zero, it is characterized in that, described power supply E is lithium battery.
- According to claim 4 lack zero, automatic safety device off zero, it is characterized in that, described alarm R is buzzer siren.
- According to claim 1 lack zero, automatic safety device off zero; it is characterized in that, described shunt circuit breaker QF is RKM1-400S/3340 model, CM1-400S/3340 model or the RMM1-100H/3340 model air switch that originates from group of Shanghai People's appliance switch factory.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420286517.7U CN203895955U (en) | 2014-05-30 | 2014-05-30 | Neutral-line-shortage and neutral-line-breakage automatic protecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420286517.7U CN203895955U (en) | 2014-05-30 | 2014-05-30 | Neutral-line-shortage and neutral-line-breakage automatic protecting device |
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| Publication Number | Publication Date |
|---|---|
| CN203895955U true CN203895955U (en) | 2014-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420286517.7U Expired - Fee Related CN203895955U (en) | 2014-05-30 | 2014-05-30 | Neutral-line-shortage and neutral-line-breakage automatic protecting device |
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| Country | Link |
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| CN (1) | CN203895955U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103986119A (en) * | 2014-05-30 | 2014-08-13 | 国家电网公司 | Null line lack and breakage automatic protection device |
| CN107680843A (en) * | 2017-11-01 | 2018-02-09 | 江阴力源电子有限公司 | A kind of external breaker of electric energy meter |
-
2014
- 2014-05-30 CN CN201420286517.7U patent/CN203895955U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103986119A (en) * | 2014-05-30 | 2014-08-13 | 国家电网公司 | Null line lack and breakage automatic protection device |
| CN103986119B (en) * | 2014-05-30 | 2017-06-20 | 国家电网公司 | Lack zero, automatic safety device off zero |
| CN107680843A (en) * | 2017-11-01 | 2018-02-09 | 江阴力源电子有限公司 | A kind of external breaker of electric energy meter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141022 Termination date: 20190530 |
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| CF01 | Termination of patent right due to non-payment of annual fee |