CN105024345B - One kind construction temporary electricity control device - Google Patents
One kind construction temporary electricity control device Download PDFInfo
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- CN105024345B CN105024345B CN201510396273.7A CN201510396273A CN105024345B CN 105024345 B CN105024345 B CN 105024345B CN 201510396273 A CN201510396273 A CN 201510396273A CN 105024345 B CN105024345 B CN 105024345B
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- relay
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Abstract
The present invention provides a kind of construction temporary electricity control device, including three outside live wires, accesses disconnecting switch（DK）, disconnecting switch exports three live wires and outside zero line is connected on quadrupole RCCB respectively（1RCD）Input, the live wire of RCCB output end, zero line connects load.Three pole RCCBs（The pole of input one 2RCD) connects（N lines）, the two poles of the earth input in addition connects the phase voltage of power supply, output one relay coil of termination respectively, and relay normally closed contact concatenates a resistance and is connected to quadrupole RCCB（1RCD）5 ends and 8 ends, when external electrical equipment body leakage, mainly external imbalance of three-phase voltage N lines produce voltage difference over the ground, ground connection again it is bad in the case of, human contact's shell will trigger three pole RCCB tripping operations, relay coil dead electricity, and its normally-closed contact connects 5 ends and 8 ends of the resistance access four-pole circuit breaker of concatenation, trigger the tripping operation of quadrupole RCCB, greatly improve construction temporary electricity safety and reliability.
Description
Technical field
The present invention relates to one kind construction temporary electricity master control cabinet.
Background technology
The master control cabinet of existing construction temporary electricity, its conventional connection when job site as shown in figure 1, use electrical equipment
Body leakage, some electric current will pass through ground wire（PE）Quick shunting, cause earth leakage protective device inflow current and outflow electricity
Flow unequal（Difference is in 30mA or so）, cause quadrupole earth leakage protective device to act, cut off the power supply of load end, protected use
The personal safety of person.But the N lines that the shell of the electrical equipment of this connection onsite application is the electric power system provided with user are connected in
Together, because job site is typically all difficult to find suitable multiple grounding device, if system earth is bad, power supply total zero
Line comes off, and the three-phase and four-line voltage that user provides has imbalance, and zero line has certain voltage over the ground（Outside factor）, construction
There is also dangerous electrical leakage voltage by the connection of system ground wire for the shell of the electrical equipment used.It is possible to the quadrupole leakage in Fig. 1
Electric switch separating brake, potential safety hazard can be also brought to user because ground wire has electrical leakage voltage, many job sites use
Electrical equipment do not leak electricity in itself, and leakage switch is separated, and load power source has been off, and but causes to get an electric shock and injures and deaths event is often
Occur in this condition.This construction temporary electricity master control cabinet can solve three-phase and four-line at the scene and be changed into five as input
Line exports（TN-C—S）If access zero line multiple grounding it is bad, and N lines produce null offset caused by the person by electric shock and
Unsafe problem.
The content of the invention
In view of above-mentioned technical deficiency, the present invention provides a kind of construction temporary electricity control device, present apparatus electrical wiring
Schematic diagram is as shown in Figure 2:Three outside live wires, a zero line are connected on the input of quadrupole RCCB, quadrupole leakage respectively
Electrical circuit breakers output end is as job site electricity consumption general supply, from input zero line（N lines）Construction ground wire is drawn,（Conditional feelings
Must multiple grounding under condition）The construction is connected to a leakage switch (leakage switch of three poles）A pole, from this
The output end of leakage switch draws construction ground wire.This ground wire of root ground wire as temporary construction electricity consumption（PE）.All devices
Shell can couple with this root ground wire.（Directly it can be connected with the shell of load）.Three other the two poles of the earth of pole RCCB are defeated
Enter to terminate 220V power supplys, export relay termination coil, if the normally opened contact closure control RCD breakers of relay make its jump
Lock, and when external ground is bad, and during the dangerous voltage of N tapes, user touches power device shell, and if shocking by electricity, horse
Upper to trigger three pole RCCB actions, cut-out N lines dangerous voltage ensures the safety of user, while relay normally open contact is again
RCD trip(ping) circuits are acted on, its RCD is also tripped.Substantially increase the safety and reliability of construction temporary electricity.Especially exist
Construction temporary electricity protection against electric shock effect in TN--C--S power supply-distribution systems is more preferable.
The present invention is realized using following scheme：One kind construction temporary electricity switch board is by quadrupole RCCB, the leakage of three poles
The parts such as electrical circuit breakers, two signal lamps, voltmeter, voltage change-over switch, wire, casing form, in addition to outside three
Live wire, access disconnecting switch（DK）, disconnecting switch exports three live wires and outside zero line is connected on quadrupole RCCB respectively
（1RCD）Input, the live wire of RCCB output end, zero line connects load.Three pole RCCBs（Input 2RCD)
One pole connects（N lines）, the two poles of the earth input in addition connects the phase voltage of power supply respectively, output one relay coil of termination, and relay is normally closed
Contact concatenates a resistance and is connected to quadrupole RCCB（1RCD）5 ends and 8 ends, it is main when external electrical equipment body leakage
If external imbalance of three-phase voltage N lines produce voltage difference over the ground, in the case of ground connection is again bad, human contact's shell will trigger
Three pole RCCB tripping operations, relay coil dead electricity, its normally-closed contact connect 5 ends of the resistance access four-pole circuit breaker of concatenation
With 8 ends, trigger the tripping operation of quadrupole RCCB.This connection changes original construction temporary electricity（TN-C-S connection), even if
It is uneven in three-phase four-wire power, in the case of ground connection is defective, the security of power supply for construction is also can guarantee that, greatly improves construction
Temporary electricity safety and reliability.
Present inventive concept novel and unique, implementation is simple and reliable, specific practical, can be widely applied to temporary electricity of constructing
Scene, improve construction temporary electricity safety.
Brief description of the drawings
Fig. 1 is background technology electrical schematic diagram.
Fig. 2 is electrical wiring schematic diagram of the present invention.
Fig. 3 is equipment arrangement schematic diagram of the embodiment of the present invention.
Embodiment
Fig. 2 is electrical schematic diagram of the embodiment of the present invention, and Fig. 3 is equipment arrangement schematic diagram of the embodiment of the present invention.They are this
Invention provides the example of construction temporary electricity master control cabinet.Sequence 1 is casing in figure 3, and sequence 2 is voltmeter, and sequence 3 is signal lamp
H1, sequence 4 are signal lamp H2, and sequence 5 is voltage change-over switch, and sequence 6 is disconnecting switch DK, and sequence 7 is three pole RCCB 2RCD.Sequence
8 be that quadrupole RCCB 1RCD. closes disconnecting switch DK in fig. 2, by voltage change-over switch, voltmeter, signal lamp H2,
External power source situation can be checked.Three outside live wires, access disconnecting switch（DK）, disconnecting switch exports three live wires and outer
The zero line in portion is connected on quadrupole RCCB respectively（1RCD）Input, the live wire of RCCB output end, zero line connects negative
Carry.Three pole RCCBs（The pole of input one 2RCD) connects（N lines）, its output end is as job site protection ground wire（PE）,
The shell of electrical equipment can be directly connect, the two poles of the earth input in addition connects the phase voltage of power supply, output one relay line of termination respectively
Circle, relay coil simultaneously connect signal lamp H1, H1 a signal lamp and can show whether three phase electric leakage breaker closes a floodgate, and relay is normal
Closed contact concatenates a resistance and is connected to quadrupole RCCB（1RCD）5 ends and 8 ends, when external electrical equipment body leakage,
Mainly external imbalance of three-phase voltage N lines produce voltage difference over the ground, and in the case of multiple grounding is again bad, human contact's shell is just
Leakage current can be produced, triggers three pole RCCB tripping operations, relay coil dead electricity, its normally-closed contact connects the resistance of concatenation
5 ends and 8 ends of four-pole circuit breaker are accessed, trigger the tripping operation of quadrupole RCCB.The resistance of relay normally closed contact concatenation
Take R=220/40=5.5 kilo-ohm.It is calculated value to ensure that three phase electric leakage breaker action message takes leakage current 40mA, power takes P
=0.04*0.04*5500=8.8 watt.
This connection changes original construction temporary electricity（TN-C-S connection), it is uneven even in three-phase four-wire power,
Be grounded it is defective in the case of, also can guarantee that the security of power supply for construction, greatly improve construction temporary electricity security and reliable
Property.If user side is provided with Three-phase five-wire power supply, three live wires and a zero line connection are constant, as long as ground wire is accessed into three-phase
In one input extremely of RCCB, output stage conduct（PE）Protect ground wire.
Preferable example in the embodiment of the present invention is the foregoing is only, it is all to make equivalent change according to scope of the present invention patent
And modification, it should all belong to covering scope of the invention.
Claims (3)
1. one kind construction temporary electricity control device, including quadrupole RCCB, three pole RCCBs, two signal lamps,
Voltmeter, voltage change-over switch, wire and casing, it is characterised in that：Three outside live wires, access disconnecting switch（DK）, every
Leave pass（DK）Three live wires of output and outside zero line are connected on quadrupole RCCB respectively（1RCD）Input, quadrupole leakage
Electrical circuit breakers（1RCD）Output end live wire, zero line connects load；Three pole RCCBs（2RCD）The pole of input one meet N
Line, in addition the two poles of the earth input connect the phase voltage of power supply, output one relay of termination, the normally-closed contact string of the coil of relay respectively
Connect a resistance and be connected to quadrupole RCCB（1RCD）One input and another output end.
A kind of 2. construction temporary electricity control device according to claim 1, it is characterised in that：The coil of relay
Resistance R=5.5K the Ω, power T=8.8W of normally-closed contact concatenation.
A kind of 3. construction temporary electricity control device according to claim 1, it is characterised in that：Three pole RCCBs
（2RCD）The relay that is connect of output end and signal lamp it is in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510396273.7A CN105024345B (en) | 2015-07-08 | 2015-07-08 | One kind construction temporary electricity control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510396273.7A CN105024345B (en) | 2015-07-08 | 2015-07-08 | One kind construction temporary electricity control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105024345A CN105024345A (en) | 2015-11-04 |
| CN105024345B true CN105024345B (en) | 2017-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510396273.7A Active CN105024345B (en) | 2015-07-08 | 2015-07-08 | One kind construction temporary electricity control device |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108429163A (en) * | 2018-05-28 | 2018-08-21 | 仲永胜 | A kind of multifunctional intelligent distribution box |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3895263A (en) * | 1974-08-27 | 1975-07-15 | Ite Imperial Corp | Grounded neutral detector drive circuit for two pole ground fault interrupter |
| CN2183572Y (en) * | 1993-10-04 | 1994-11-23 | 林柏宏 | Drain voltage inductor |
| CN2279724Y (en) * | 1996-07-19 | 1998-04-22 | 陈满平 | Leakage breaker with zero line detection function |
| CN101257204A (en) * | 2008-04-14 | 2008-09-03 | 石在虹 | Intelligent double-control electrical leakage breaking alarm |
| CN104201648A (en) * | 2014-09-15 | 2014-12-10 | 福建通用同溢电气有限公司 | New distribution connection method and device |
| CN104734128A (en) * | 2015-03-13 | 2015-06-24 | 国家电网公司 | Low-voltage distribution network null wire break protector |
-
2015
- 2015-07-08 CN CN201510396273.7A patent/CN105024345B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3895263A (en) * | 1974-08-27 | 1975-07-15 | Ite Imperial Corp | Grounded neutral detector drive circuit for two pole ground fault interrupter |
| CN2183572Y (en) * | 1993-10-04 | 1994-11-23 | 林柏宏 | Drain voltage inductor |
| CN2279724Y (en) * | 1996-07-19 | 1998-04-22 | 陈满平 | Leakage breaker with zero line detection function |
| CN101257204A (en) * | 2008-04-14 | 2008-09-03 | 石在虹 | Intelligent double-control electrical leakage breaking alarm |
| CN104201648A (en) * | 2014-09-15 | 2014-12-10 | 福建通用同溢电气有限公司 | New distribution connection method and device |
| CN104734128A (en) * | 2015-03-13 | 2015-06-24 | 国家电网公司 | Low-voltage distribution network null wire break protector |
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| Publication number | Publication date |
|---|---|
| CN105024345A (en) | 2015-11-04 |
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