CN103986119A - Null line lack and breakage automatic protection device - Google Patents
Null line lack and breakage automatic protection device Download PDFInfo
- Publication number
- CN103986119A CN103986119A CN201410240998.2A CN201410240998A CN103986119A CN 103986119 A CN103986119 A CN 103986119A CN 201410240998 A CN201410240998 A CN 201410240998A CN 103986119 A CN103986119 A CN 103986119A
- Authority
- CN
- China
- Prior art keywords
- zero
- circuit breaker
- shunt
- auxiliary contact
- relay
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 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
- 238000001514 detection method Methods 0.000 abstract 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
- 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
Abstract
The invention discloses a null line lack and breakage automatic protection device, and belongs to the technical field of electric protection devices. The null line lack and breakage automatic protection device comprises a control part circuit and a detection part circuit. The control part circuit comprises a shunt circuit breaker and an auxiliary contact of a relay. The detection part circuit comprises a relay KC and further comprises a stop button SB1 of the shunt circuit breaker QF and a leakage protector RCD. The null line lack and breakage automatic protection device further comprises an alarming part circuit composed of a power supply E, a normally closed auxiliary contact QF3 of the shunt circuit breaker QF, an alarm R and a switch K, wherein the power supply E, the normally closed auxiliary contact QF3 of the shunt circuit breaker QF, the alarm R and the switch K are sequentially electrically connected. The null line lack and breakage automatic protection device is simple in structure, convenient to use, high in safety, intelligent degree and universality, low in cost, basically free of maintenance, and especially suitable for a three-phase four-wire transformer and three-phase four-wire electric equipment, and field change or circuit connection is convenient.
Description
Technical field
The invention 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, to user, cause serious economic loss, to power supply enterprise, bring unnecessary Claims Resolution responsibility and economic loss, 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 accident of human electric shock equally.
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 guarantee the Electrical Safety of low-voltage distribution system.
Summary of the invention
Technical problem to be solved by this invention is to overcome the deficiencies in the prior art, and a kind of lack zero, automatic safety device off zero are provided, 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, the technical solution used in the present invention is:
Lack zero, an 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 shunt opening coil F1 with the dynamic circuit breaker auxiliary contact I KC1 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 the power supply E, the shunt circuit breaker QF that are electrically connected to 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 present invention 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 to lack 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.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is embodiment of the present invention 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 scarce zero, automatic safety device off zero, comprises control section circuit and test section circuit, and 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 shunt opening coil F1 with the dynamic circuit breaker auxiliary contact I KC1 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, reliable on off for 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, for detection of shunt circuit breaker QF, normally disconnect main contacts 1, plays test effect; And under earth leakage protective device RCD, connect a plurality of shunt air switches, when 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 power consumption equipment, lack generation zero, 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 the power supply E, the shunt circuit breaker QF that are electrically connected to 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.
When 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 are closed, 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.When zero line disconnects, relay K C coil makes the normally open contact of relay K C closed 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 actions, making main contacts 1 disconnect protection equipment below can not 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 of shunt circuit breaker QF is closed, connects alarm R warnings of blowing a whistle, and reminds staff's circuit that zero or fault off zero, alarm R stop alarm after staff pulls open K switch occur to lack.
Shunt opening coil trip 4 is when normal work, and its shunt opening coil F1 is power-off, and when shunt opening coil F1 energising, armature drives free tripping mechanism 2 actions, 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 surpass 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)
1. 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 shunt opening coil F1 with the dynamic circuit breaker auxiliary contact I KC1 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.
2. according to claim 1ly 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.
3. according to claim 2ly 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.
4. according to zero, the automatic safety device off zero of lacking described in claim 1,2 or 3; 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 the power supply E, the shunt circuit breaker QF that are electrically connected to successively.
5. scarce zero, automatic safety device off zero according to claim 4, is characterized in that, described power supply E is lithium battery.
6. scarce zero, automatic safety device off zero according to claim 4, is characterized in that, described alarm R is buzzer siren.
7. according to claim 1ly 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 |
|---|---|---|---|
| CN201410240998.2A CN103986119B (en) | 2014-05-30 | 2014-05-30 | Lack zero, automatic safety device off zero |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410240998.2A CN103986119B (en) | 2014-05-30 | 2014-05-30 | Lack zero, automatic safety device off zero |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103986119A true CN103986119A (en) | 2014-08-13 |
| CN103986119B CN103986119B (en) | 2017-06-20 |
Family
ID=51277989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410240998.2A Active CN103986119B (en) | 2014-05-30 | 2014-05-30 | Lack zero, automatic safety device off zero |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103986119B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113937735A (en) * | 2021-10-26 | 2022-01-14 | 傲普(上海)新能源有限公司 | Pre-charging, over-voltage and over-current protection circuit and method for battery module |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2279024Y (en) * | 1996-12-19 | 1998-04-15 | 封凌艳 | Three-phase four-wire system power supply line break zero protecting device |
| CN201038732Y (en) * | 2007-05-25 | 2008-03-19 | 王彦军 | Electrical equipment protecting device |
| CN202333748U (en) * | 2011-11-29 | 2012-07-11 | 南宫市供电有限责任公司 | Three-phase four-wire null line breakdown protection device |
| CN103441466A (en) * | 2013-08-16 | 2013-12-11 | 湛江开关有限公司 | Automatic phase-failure zero-failure power-off protection device |
| CN203895955U (en) * | 2014-05-30 | 2014-10-22 | 国家电网公司 | Neutral-line-shortage and neutral-line-breakage automatic protecting device |
-
2014
- 2014-05-30 CN CN201410240998.2A patent/CN103986119B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2279024Y (en) * | 1996-12-19 | 1998-04-15 | 封凌艳 | Three-phase four-wire system power supply line break zero protecting device |
| CN201038732Y (en) * | 2007-05-25 | 2008-03-19 | 王彦军 | Electrical equipment protecting device |
| CN202333748U (en) * | 2011-11-29 | 2012-07-11 | 南宫市供电有限责任公司 | Three-phase four-wire null line breakdown protection device |
| CN103441466A (en) * | 2013-08-16 | 2013-12-11 | 湛江开关有限公司 | Automatic phase-failure zero-failure power-off protection device |
| CN203895955U (en) * | 2014-05-30 | 2014-10-22 | 国家电网公司 | Neutral-line-shortage and neutral-line-breakage automatic protecting device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113937735A (en) * | 2021-10-26 | 2022-01-14 | 傲普(上海)新能源有限公司 | Pre-charging, over-voltage and over-current protection circuit and method for battery module |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103986119B (en) | 2017-06-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102005720B (en) | Neutral line breakage detection protection method and device | |
| CN203911590U (en) | Ship shore power device with safety interlocking function | |
| CN103427394B (en) | A kind of mining explosion-isolating low-voltage selective earth leakage protection device | |
| CN1829035B (en) | Building electric fire hidden trouble alarm power distribution method and its circuit | |
| CN203895955U (en) | Neutral-line-shortage and neutral-line-breakage automatic protecting device | |
| CN114188971A (en) | Photovoltaic box-type substation | |
| CN101740272A (en) | Mechanical high-voltage circuit breaker with short circuit self-locking function | |
| CN202917961U (en) | Self-recovery type over-voltage and under-voltage protection circuit breaker | |
| CN202772545U (en) | Safe power supply device for isolation transformer | |
| CN206806982U (en) | A kind of three-phase four-wire power phase shortage and phase sequence warning device | |
| CN103986119A (en) | Null line lack and breakage automatic protection device | |
| CN205881836U (en) | Electronic type time relay switching -on device that delays | |
| CN201444469U (en) | Automatic air switch with temperature protection function | |
| CN201838977U (en) | Neutral line burn-out prevention automatic protection device of low-voltage distribution network | |
| CN201562644U (en) | Mechanical high-voltage circuit breaker having short circuit self-locking function | |
| CN2753010Y (en) | Power socket with overcurrent and short circuit protective device | |
| CN204314645U (en) | A kind of low-voltage distribution system by screen break-make automaton | |
| CN207559538U (en) | A kind of three-phase automatic reclosing device with wireless communication function | |
| CN210466694U (en) | Electrical hidden danger early warning system | |
| CN209056099U (en) | Line combined floodgate power transmission body-sensing device with ground | |
| CN203839915U (en) | Temporary power distribution box power leakage protection alarm control circuit of construction site | |
| CN208046205U (en) | It is a kind of with integrated protection for electric installation | |
| CN203192723U (en) | Under-voltage trip gear for breaker | |
| CN201188538Y (en) | Alarm device for current deviation of juxtaposition operation transformers | |
| CN106410741A (en) | Self-power transmission device of universal circuit breaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |