CN103986119B - Lack zero, automatic safety device off zero - Google Patents
Lack zero, automatic safety device off zero Download PDFInfo
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- CN103986119B CN103986119B CN201410240998.2A CN201410240998A CN103986119B CN 103986119 B CN103986119 B CN 103986119B CN 201410240998 A CN201410240998 A CN 201410240998A CN 103986119 B CN103986119 B CN 103986119B
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- circuit breaker
- shunt
- zero
- relay
- auxiliary contact
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- 230000001681 protective effect Effects 0.000 claims abstract description 19
- 238000001514 detection method Methods 0.000 claims abstract description 12
- 230000005611 electricity Effects 0.000 claims description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical group [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052744 lithium Inorganic materials 0.000 claims description 4
- 230000006837 decompression Effects 0.000 claims description 2
- 230000001012 protector Effects 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 6
- 230000004048 modification Effects 0.000 abstract description 3
- 238000012986 modification Methods 0.000 abstract description 3
- 206010014357 Electric shock Diseases 0.000 description 4
- 230000007935 neutral effect Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
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- Emergency Protection Circuit Devices (AREA)
Abstract
Lack zero, automatic safety device off zero the invention discloses one kind, belong to electric protection device technical field.Including control section circuit and detection part circuit, control section circuit includes the auxiliary contact of shunt circuit breaker and relay；Detection part circuit includes relay KC, stop button SB1 and earth leakage protective device RCD also including shunt circuit breaker QF；Also include the alarm portion circuit that power supply E, dynamic circuit breaker auxiliary contact QF3, the alarm R of shunt circuit breaker QF and switch K by being sequentially connected electrically are constituted.Simple structure of the present invention, easy to use, high safety, intelligence degree is high, and highly versatile is with low cost, and substantially without maintenance, field modification or connection circuit are convenient；It is particularly suited for being used in three-phase and four-line transformer and three-phase and four-line electrical equipment.
Description
Technical field
The invention belongs to electric protection device technical field.
Background technology
At present, because a variety of situations and reason cause lighting transformer zero line to blow failure, such as in JP cabinets zero in batch meter
Line is blown, and step down side zero line blows etc., and extremely serious consequence can be brought after causing such case.Because load
Imbalance will bring the imbalance of three-phase voltage, if once neutral line break, the uneven of three-phase load voltage can be more serious
It is unbalance, electrical equipment working characteristics is changed, brownout equipment cannot work, and overtension shortens equipment life, makes
Electrical equipment is burnt out into many users, or even fire can be caused, serious economic loss is caused to user, brought to power supply enterprise
Unnecessary Claims Resolution responsibility and economic loss, while having had a strong impact on the brand image of power supply enterprise.Once neutral line break,
Protective effect will be lost using the electrical equipment of zero line protection, equipment is once leaked electricity will cause personal electric shock, even if at this moment setting
Standby leakproof, because zero line makes device housings powered per se with dangerous voltage, can equally cause accident of human electric shock.
According to neutral line break in three-phase four-wire low-voltage distribution system, it is a lot of that neutral potential offset causes overvoltage to cause
The actual conditions of accident, it would be desirable to a kind of zero line missing, burn out detection protection device be easy to and make is researched and developed, to ensure
The Electrical Safety of low-voltage distribution system.
The content of the invention
The technical problems to be solved by the invention are to overcome the deficiencies in the prior art, there is provided one kind lacks zero, automatic guarantor off zero
Protection unit, its simple structure, easy to use, high safety, intelligence degree is high, and highly versatile is with low cost, substantially without dimension
Repair, field modification or connection circuit are convenient；It is particularly suited for three-phase and four-line transformer（Such as lighting transformer）Used with three-phase and four-line
Used in electric equipment.
In order to solve the above technical problems, the technical solution used in the present invention is：
One kind lacks zero, automatic safety device off zero, including control section circuit and detection part circuit, wherein：
The control section circuit includes auxiliary contact KC1, KC2 of shunt circuit breaker QF and relay KC, the shunt opening
Circuit breaker Q F is provided with shunt opening coil F1 and the auxiliary contact of more than 1；The QF1 of dynamic circuit connector auxiliary contact I of the shunt circuit breaker QF
It is connected with the A phase lines of three phase mains, the other end connects through the KC1 of dynamic circuit breaker auxiliary contact I and shunt opening coil F1 with relay KC successively
Connect, then again through relay KC the KC2 of dynamic circuit breaker auxiliary contact II and shunt circuit breaker QF the QF2 of dynamic circuit connector auxiliary contact II and three
Phase power line B phase lines are connected；
The coil two ends of the detection part circuit including relay KC, the relay KC respectively with zero line N and three-phase
The C phase lines connection of power supply.
The detection part circuit also including shunt circuit breaker QF stop button SB1, described stop button SB1 one end with
The C phase lines connection of three phase mains, the other end is connected by the coil of relay KC with zero line N.
The detection part circuit also includes the C of earth leakage protective device RCD, described stop button SB1 one end and three phase mains
Phase line is connected, and the other end connects through earth leakage protective device RCD with zero line, the coil two ends of relay KC respectively with earth leakage protective device
RCD connects with zero line N.
Also include alarm portion circuit, the alarm portion circuit includes the power supply E, the shunt circuit breaker QF that are sequentially connected electrically
Dynamic circuit breaker auxiliary contact QF3, alarm R and switch K.
The power supply E is lithium battery.
The alarm R is buzzer siren.
The shunt circuit breaker QF is RKM1-400S/3340 models, the CM1- for originating from group of Shanghai People's electric switch factory
400S/3340 models or RMM1-100H/3340 model air switches.
It is using the beneficial effect produced by above-mentioned technical proposal：Simple structure of the present invention, easy to use, security
By force, intelligence degree is high, highly versatile, with low cost, and substantially without maintenance, field modification or connection circuit are convenient, especially fit
For three-phase and four-line transformer（Such as lighting transformer）Used with three-phase and four-line electrical equipment；Including control section circuit and inspection
Partial circuit is surveyed, circuit is simple and reliable；Detection part circuit also includes stop button, effectively verifies shunt circuit breaker main contacts
Reliable on off, and earth leakage protective device, prevent the accident of human electric shock that equipment leakage is caused；Also include alarm portion circuit, peace
Quan Xingqiang, intelligence degree is high, realizes and alarm, is easy to the operation maintenance personnel very first time to find to lack zero, accident off zero；Power supply E
It is lithium battery, long service life, capacity is big, and high temperature resistant, small volume is lightweight, safety and environmental protection；Alarm is buzzer siren,
Warning effect is substantially, simple to operate；The shunt circuit breaker QF is the RKM1- for originating from group of Shanghai People's electric switch factory
400S/3340 models, CM1-400S/3340 models or RMM1-100H/3340 model air switches, element are easy to get, low cost
It is honest and clean, stable performance.
Brief description of the drawings
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
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 connectors auxiliary contact I, KC1, relay KC are moved
Disconnected auxiliary contact I, F1, shunt opening coil, KC2, relay KC dynamic circuit breakers auxiliary contact II, QF2, shunt circuit breaker QF dynamic circuit connectors auxiliary are touched
First II, SB1, stop button, RCD, earth leakage protective device, E, power supply, QF3, shunt circuit breaker QF dynamic circuit breaker auxiliary contacts, R, alarm
Device, K, switch, 1, main contacts, 2, free tripping mechanism, 3, overcurrent trip, 4, shunt opening coil electrical apparatus release, 5, thermal trip,
6th, under-voltage release.
Specific embodiment
Referring to Fig. 1 and Fig. 2, one kind lacks zero, automatic safety device off zero, including control section circuit and detection part electricity
Road, circuit is simple, and intelligence degree is high, wherein：
The control section circuit includes auxiliary contact KC1, KC2 of shunt circuit breaker QF and relay KC, the shunt opening
Circuit breaker Q F is from the RKM1-400S/3340 model air switches for originating from group of Shanghai People's electric switch factory（Or other
Breaker of the model with shunt opening coil and auxiliary contact）, element is easy to get, with low cost, stable performance, and it is provided with shunt opening coil F1
With 3 auxiliary contacts QF1, QF2 and QF3；The QF1 of dynamic circuit connector auxiliary contact I of the shunt circuit breaker QF and the A phase lines of three phase mains
Connection, warp is connected the other end with the KC1 of dynamic circuit breaker auxiliary contact I and shunt opening coil F1 of relay KC successively, then again through relay
The QF2 of dynamic circuit connector auxiliary contact II of the KC2 of dynamic circuit breaker auxiliary contact II and shunt circuit breaker QF of KC is connected with three-phase power line B phase lines.
The detection part circuit includes a relay KC, for splicing thread road Personal Safety and checking shunt opening open circuit
The reliable on off of device QF main contacts 1, is additionally provided with the stop button SB1 of an earth leakage protective device RCD and shunt circuit breaker QF, relay
Device KC, earth leakage protective device RCD and stop button SB1 three's annexation are：Described stop button SB1 one end and three phase mains
C phase lines are connected, and the other end connects through earth leakage protective device RCD with zero line, the coil two ends of relay KC respectively with earth leakage protective device
RCD connects with zero line N；Stop button SB1 is located on the panel of shunt circuit breaker QF, for detecting that can shunt circuit breaker QF just
Normal off opens main contacts 1, plays test；And multiple branch air switches are connect under earth leakage protective device RCD, when branch air switch phase
When the equipment of pass occurs electric leakage accident, earth leakage protective device RCD actions prevent personal Danger Electric shock risk, improve electrical safety.
In order that the operation maintenance personnel very first time knows that electrical equipment lacks the zero, generation of failure off zero, an alarm is additionally provided with
Partial circuit, the alarm portion circuit include be sequentially connected electrically power supply E, the dynamic circuit breaker auxiliary contact QF3 of shunt circuit breaker QF,
Alarm R and switch K, power supply E are lithium battery, and long service life, capacity are big, and high temperature resistant, small volume is lightweight, safety and environmental protection；
Alarm R is buzzer siren, and warning effect is substantially, simple to operate, is easy to operation maintenance personnel rapid-maintenance.
Auxiliary contact QF1, QF2 and QF3 of shunt circuit breaker QF draws outside plastic housing, shunt opening coil electrical apparatus release 4
Joint can again draw or wiring internally from inside, easy-to-connect.
When there is electricity shunt circuit breaker QF upper ends, earth leakage protective device RCD normal works.Voltage 220V power supplys are sent to relay
The coil of KC, normally closed interlock KC1, KC2 of relay KC disconnect.When shunt circuit breaker QF closes a floodgate, its normally open contact QF1, QF2
Closure, but now normally closed interlock KC1, KC2 of relay KC is to disconnect, and the shunt opening coil F1 of shunt circuit breaker QF still breaks
Electricity.When zero line disconnects, relay KC coils close the normally open contact of relay KC because of decompression, and shunt circuit breaker QF's divides
Encourage coil F1 and thus obtain electric, the armature of shunt circuit breaker QF drives free tripping mechanism 2 to act, and main contacts 1 is disconnected under protection
The equipment in face will not be burned out, and QF1 and QF2 are also simultaneously switched off, and protect shunt opening coil F1 not to be burned out；Shunt circuit breaker QF master touches
While point 1 disconnects, the dynamic circuit breaker auxiliary contact QF3 closures of shunt circuit breaker QF are connected alarm R and are blown a whistle alarm, prompting work
Personnel's circuit occurs to lack zero or off zero failure, the alarm R stop alarms after staff pulls open switch K.
In normal work, its shunt opening coil F1 is powered off shunt opening coil electrical apparatus release 4, when shunt opening coil F1 is powered, rank
The dynamic free tripping mechanism 2 of sheet iron strip is acted, and disconnects main contacts 1.Shunt opening coil electrical apparatus release 4 is a kind of dropout of use voltage source excitation
Device, and be short time duty, shunt opening coil F1 conduction times are general no more than 1S, can otherwise be burned out.To prevent shunt opening
Coil F1 is burnt, and while shunt circuit breaker QF main contacts disconnect, its dynamic circuit connector auxiliary contact QF1, QF2 is also simultaneously switched off,
So that shunt opening coil F1 power-off is not burned out, effective protection device.
This is the connection of a wherein way switch, and remaining each branch switch is attached according to this annexation, does not go to live in the household of one's in-laws on getting married one by one
State.
The present apparatus is applied to lighting transformer, works well, also can be widely used in each three-phase and four-line electrical equipment and
Other field transformers, with application value higher.
Claims (4)
1. it is a kind of to lack zero, automatic safety device off zero, it is characterised in that including control section circuit and detection part circuit, its
In：
The control section circuit includes auxiliary contact KC1, KC2 of shunt circuit breaker QF and relay KC, the shunt opening open circuit
Device QF is provided with shunt opening coil F1 and the auxiliary contact of more than 1；The QF1 of dynamic circuit connector auxiliary contact I and three of the shunt circuit breaker QF
The A phase lines connection of phase power supply, warp is connected the other end with the KC1 of dynamic circuit breaker auxiliary contact I and shunt opening coil F1 of relay KC successively,
Then again through relay KC the KC2 of dynamic circuit breaker auxiliary contact II and shunt circuit breaker QF the QF2 of dynamic circuit connector auxiliary contact II and three-phase electricity
Source line B phase line connections；The detection part circuit includes relay KC, the stop button SB1 of shunt circuit breaker QF and electric leakage
Protector RCD, described stop button SB1 one end is connected with the C phase lines of three phase mains, and the other end is through earth leakage protective device RCD and zero
Line connects, and the coil two ends of relay KC connect with earth leakage protective device RCD with zero line N respectively；The protection device also includes report
Alert partial circuit, the alarm portion circuit includes the power supply E, the dynamic circuit breaker auxiliary contact of shunt circuit breaker QF that are sequentially connected electrically
QF3, alarm R and switch K；
Stop button SB1 is located on the panel of shunt circuit breaker QF, for detecting that can shunt circuit breaker QF normally disconnect main touching
Point（1）, play test；And multiple branch air switches are connect under earth leakage protective device RCD, when the related equipment of branch air switch
During generation electric leakage accident, earth leakage protective device RCD actions；
When there is electricity shunt circuit breaker QF upper ends, earth leakage protective device RCD normal works；Voltage 220V power supplys are sent to relay KC's
Coil, normally closed interlock KC1, KC2 of relay KC disconnect；When shunt circuit breaker QF closes a floodgate, its normally open contact QF1, QF2 is closed
Close, but now normally closed interlock KC1, KC2 of relay KC is to disconnect, and the shunt opening coil F1 of shunt circuit breaker QF is still powered off；
When zero line disconnects, relay KC coils close the normally open contact of relay KC because of decompression, the shunt opening of shunt circuit breaker QF
Coil F1 thus obtains electric, and the armature of shunt circuit breaker QF drives free tripping mechanism 2 to act, and main contacts 1 is disconnected protection following
Equipment will not be burned out, QF1 and QF2 are also simultaneously switched off, and protect shunt opening coil F1 not to be burned out；Shunt circuit breaker QF main contacts
1 while disconnect, and the dynamic circuit breaker auxiliary contact QF3 closures of shunt circuit breaker QF are connected alarm R and blown a whistle alarm, prompting work people
Member's circuit occurs to lack zero or off zero failure, the alarm R stop alarms after staff pulls open switch K.
2. it is according to claim 1 to lack zero, automatic safety device off zero, it is characterised in that the power supply E is lithium battery.
3. it is according to claim 1 to lack zero, automatic safety device off zero, it is characterised in that the alarm R is buzzing report
Alert device.
4. it is according to claim 1 to lack zero, automatic safety device off zero, it is characterised in that the shunt circuit breaker QF is
Originate from RKM1-400S/3340 models, CM1-400S/3340 models or the RMM1-100H/ of group of Shanghai People's electric switch factory
3340 model air switches.
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 CN103986119A (en) | 2014-08-13 |
| CN103986119B true CN103986119B (en) | 2017-06-20 |
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ID=51277989
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| 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 |
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| Country | Link |
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| CN (1) | CN103986119B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113937735B (en) * | 2021-10-26 | 2023-07-18 | 傲普(上海)新能源有限公司 | Battery module pre-charging and overvoltage and overcurrent protection circuit and method |
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 |
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| Publication number | Publication date |
|---|---|
| CN103986119A (en) | 2014-08-13 |
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