CN105024345A - Construction temporary power utilization control device - Google Patents
Construction temporary power utilization control device Download PDFInfo
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- CN105024345A CN105024345A CN201510396273.7A CN201510396273A CN105024345A CN 105024345 A CN105024345 A CN 105024345A CN 201510396273 A CN201510396273 A CN 201510396273A CN 105024345 A CN105024345 A CN 105024345A
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- circuit breaker
- current circuit
- pole
- residual current
- power utilization
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- 238000010276 construction Methods 0.000 title claims abstract description 28
- 230000005611 electricity Effects 0.000 claims description 24
- 238000002955 isolation Methods 0.000 abstract 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 230000007547 defect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 230000002950 deficient Effects 0.000 description 2
- 238000009429 electrical wiring Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000034994 death Effects 0.000 description 1
- 231100000517 death Toxicity 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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Abstract
The invention provides a construction temporary power utilization control device. Three external live lines are connected with an isolation switch (DK). The three live lines outputted by the isolation switch (DK) and an external zero line are connected with an input end of a four-pole residual-current circuit breaker (1RCD). The live line and the zero line at the output end of the residual-current circuit breaker are connected with a load. One pole at an input end of a three-pole residual-current circuit breaker (2RCD) is connected with an N line, and the other two pole inputs are connected with a phase voltage of a power supply. The output end of the three-pole residual-current circuit breaker is connected with a relay coil. A relay normally closed contact is in series connection with a resistor and connection with the fifth end and the eighth end of the four-pole residual-current circuit breaker (1RCD) when electric leakage of a housing of an external power utilization device happens. The beneficial effects are that original construction temporary power utilization (TN-C-S) connection is changed, construction power utilization safety can be ensured even under conditions that a three-phase four-wire power supply is unbalanced and grounding has defects, and construction temporary power utilization safety and reliability are raised greatly.
Description
Technical field
The present invention relates to a kind of construction temporary electricity control device.
Background technology
The master control cabinet of existing construction temporary electricity; its conventional connection as shown in Figure 1; use electric appliance casing when job site leaks electricity; some electric current will pass through ground wire (PE) and shunt fast; cause earth leakage protective device inflow current and flow out electric current unequal (difference is at about 30mA); cause four pole earth leakage protective device actions, excised the power supply of load end, protected the personal safety of user.But the shell of the electrical equipment of this connection onsite application is the N line of the electric power system provided with user to connect together, because job site is generally all difficult to find suitable iterative earthing device, if system earth is bad, the total zero line of power supply comes off, the three-phase and four-line voltage that user provides exists uneven, there is certain voltage (outside factor) in zero line, the shell of the electrical equipment of construction usage also also exists dangerous electrical leakage voltage by the connection of system ground wire over the ground.Likely at the four pole leakage switch separating brake of Fig. 1, also potential safety hazard can be brought to user because ground wire exists electrical leakage voltage, the electrical equipment itself that many job sites use does not leak electricity, and leakage switch is separated, load power source is turned off, and but causes electric shock and injures and deaths event to occur in this condition often.This construction temporary electricity master control cabinet can solve three-phase and four-line at the scene and become five lines output (TN-C-S) if the zero line iterative earthing of access is bad as input, and the N line person produced caused by null offset suffers electric shock and unsafe problem.
Summary of the invention
In view of above-mentioned technical deficiency, the invention provides a kind of construction temporary electricity control device, this device electrical wiring schematic diagram is as shown in Figure 2: three outside live wires, a zero line is connected on the input of four pole residual current circuit breaker respectively, four pole residual current circuit breaker outputs are as job site electricity consumption general supply, construction ground wire is drawn from input zero line (N line), (in situation with good conditionsi must iterative earthing) this construction earth connection is connected to a pole of a leakage switch (leakage switch of three poles), draws construction ground wire from the output of this leakage switch.This root ground wire is as the earth connection (PE) of temporary construction electricity consumption.The shell of all devices can connect with this root ground wire.(can directly be connected with the shell of load).Three pole residual current circuit breaker other the two poles of the earth input termination 220V power supply, output contact relay coil, if the normally opened contact Closed control RCD circuit breaker of relay makes it trip, and when external ground is bad, and during the dangerous voltage of N tape, user touches power device shell, if there is electric shock, cause three pole residual current circuit breaker actions at once, cut off the safety that N line dangerous voltage ensures user, relay normally open contact acts on again RCD trip(ping) circuit simultaneously, and its RCD is also tripped.Substantially increase the safety and reliability of construction temporary electricity.Especially the construction temporary electricity protection against electric shock better effects if in TN--C--S power supply-distribution system.
The present invention adopts following scheme to realize: a kind of construction temporary electricity control cubicle is by four pole residual current circuit breaker, three pole residual current circuit breaker, two signal lamps, voltmeter, voltage change-over switch, wire, the parts compositions such as casing, also comprise three outside live wires, access isolating switch (DK), isolating switch exports the input that three live wires and outside zero line are connected on four pole residual current circuit breaker (1RCD) respectively, and the live wire of residual current circuit breaker output, zero line connects load.Input one pole of three pole residual current circuit breaker (2RCD) connects (N line), the two poles of the earth input connects the phase voltage of power supply respectively in addition, export termination relay coil, relay normally-closed contact is connected in series 5 ends and 8 ends that a resistance is connected to four pole residual current circuit breaker (1RCD), when external power consumption equipment body leakage, mainly external imbalance of three-phase voltage N line produces voltage difference over the ground, ground connection is again in bad situation, human contact's shell will cause three pole residual current circuit breaker tripping operations, relay coil dead electricity, its normally-closed contact connects 5 ends and 8 ends of the resistance access four-pole circuit breaker of serial connection, cause four pole residual current circuit breaker tripping operations.This connection changes the connection of temporary electricity (TN-C-S) that originally constructed, even if uneven at three-phase four-wire power, in the defective situation of ground connection, also can ensure the fail safe of power supply for construction, greatly improves construction temporary electricity safety and reliability.
The novel uniqueness of the present invention, implementation is simple and reliable, specifically practical, can be widely used in the scene of construction temporary electricity, improve the safety of construction temporary electricity.
Accompanying drawing explanation
Fig. 1 is background technology electrical schematic diagram;
Fig. 2 is electrical wiring schematic diagram of the present invention;
Fig. 3 is that schematic diagram arranged by embodiment of the present invention equipment.
Embodiment
Fig. 2 is embodiment of the present invention electrical schematic diagram, and Fig. 3 is that schematic diagram arranged by embodiment of the present invention equipment.They are the example that the invention provides 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, and sequence 4 is signal lamp H2, and sequence 5 is voltage change-over switch, and sequence 6 is isolating switch DK, and sequence 7 is three pole residual current circuit breaker 2RCD.Sequence 8 is that four pole residual current circuit breaker 1RCD. close isolating switch DK in fig. 2, by voltage change-over switch, voltmeter, signal lamp H2, can check external power source situation.Three outside live wires, access isolating switch (DK), isolating switch exports the input that three live wires and outside zero line are connected on four pole residual current circuit breaker (1RCD) respectively, and the live wire of residual current circuit breaker output, zero line connects load.Input one pole of three pole residual current circuit breaker (2RCD) connects (N line), its output protects ground wire (PE) as job site, directly can connect the shell of power consumption equipment, the two poles of the earth input connects the phase voltage of power supply respectively in addition, export termination relay coil, relay coil also meets a signal lamp H1, whether H1 signal lamp can show three phase electric leakage breaker and close a floodgate, relay normally-closed contact is connected in series 5 ends and 8 ends that a resistance is connected to four pole residual current circuit breaker (1RCD), when external power consumption equipment body leakage, mainly external imbalance of three-phase voltage N line produces voltage difference over the ground, iterative earthing is again in bad situation, human contact's shell will produce leakage current, cause three pole residual current circuit breaker tripping operations, relay coil dead electricity, its normally-closed contact connects 5 ends and 8 ends of the resistance access four-pole circuit breaker of serial connection, cause four pole residual current circuit breaker tripping operations.The resistance of relay normally-closed contact serial connection gets R=220/40=5.5 kilo-ohm.Getting leakage current 40mA for guarantee three phase electric leakage breaker action message is calculated value, and power gets P=0.04*0.04*5500=8.8 watt.
This connection changes the connection of temporary electricity (TN-C-S) that originally constructed, even if uneven at three-phase four-wire power, in the defective situation of ground connection, also can ensure the fail safe of power supply for construction, greatly improves construction temporary electricity safety and reliability.If user side provides Three-phase five-wire power supply, three live wires and a zero line connection constant, as long as input ground wire being accessed three phase electric leakage breaker is extremely gone up, output stage protects ground wire as (PE).
The foregoing is only preferable example in the embodiment of the present invention, allly do impartial change according to the present patent application the scope of the claims and modify, all should belong to covering scope of the present invention.
Claims (3)
1. a construction temporary electricity control device, comprise four pole residual current circuit breaker, three pole residual current circuit breaker, two signal lamps, voltmeter, voltage change-over switch, wire and casings, it is characterized in that: three outside live wires, access isolating switch DK, isolating switch DK exports the input that three live wires and outside zero line are connected on four pole residual current circuit breaker 1RCD respectively, the live wire of the output of residual current circuit breaker 1RCD, zero line connects load; Input one pole of three pole residual current circuit breaker 2RCD connects N line, the two poles of the earth input connects the phase voltage of power supply respectively in addition, export termination relay, the normally-closed contact of the coil of relay is connected in series a resistance and is connected to four pole residual current circuit breaker 1RCD input and another output.
2. one construction temporary electricity control device according to claim 1, is characterized in that: the resistance of the resistance of the normally-closed contact serial connection of the coil of relay is R5.5K
, and power is 8.8W.
3. one construction temporary electricity control device according to claim 1, is characterized in that: the relay that the output of three pole residual current circuit breaker 2RCD connects and signal lamp 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 true CN105024345A (en) | 2015-11-04 |
| CN105024345B CN105024345B (en) | 2017-12-05 |
Family
ID=54414133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510396273.7A Expired - Fee Related CN105024345B (en) | 2015-07-08 | 2015-07-08 | One kind construction temporary electricity control device |
Country Status (1)
| Country | Link |
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| CN (1) | CN105024345B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 not_active Expired - Fee Related
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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108429163A (en) * | 2018-05-28 | 2018-08-21 | 仲永胜 | A kind of multifunctional intelligent distribution box |
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| CN105024345B (en) | 2017-12-05 |
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Granted publication date: 20171205 |
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