CN203589726U - Power supply device of IT system with distributed neutral conductor - Google Patents
Power supply device of IT system with distributed neutral conductor Download PDFInfo
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- CN203589726U CN203589726U CN201320676625.0U CN201320676625U CN203589726U CN 203589726 U CN203589726 U CN 203589726U CN 201320676625 U CN201320676625 U CN 201320676625U CN 203589726 U CN203589726 U CN 203589726U
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- neutral conductor
- power supply
- transformer
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- 230000007935 neutral effect Effects 0.000 title claims abstract description 46
- 239000004020 conductor Substances 0.000 title claims abstract description 42
- 238000009434 installation Methods 0.000 claims description 10
- 238000005516 engineering process Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010616 electrical installation Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model provides a power supply device of an IT system with a distributed neutral conductor. The power supply device can provide a three-phase three-wire power supply and also can provide a three-phase four-wire power supply. The power supply system comprises a transformer, a three-phase three-wire power supply side breaker and a three-phase four-wire power supply side breaker; and a neutral line is led out from the low-voltage side of the transformer, a breaker QF3 is arranged between a three-phase three-wire electrical load and the transformer, a breaker QF2 is arranged between a three-phase four-wire electrical load and the transformer, the three-phase four-wire power supply employs the IT system with the distributed neutral conductor, and the three-phase three-wire power supply employs the IT system without the distributed neutral conductor. The IT system is equipped with the distributed neutral conductor; the three-phase three-wire power supply can be provided, and an AC 220V power supply can be directly obtained; and single-phase electrical equipment can be powered.
Description
Technical field
The utility model relates to a kind of neutral conductor IT system electric supply installation of allotting, and belongs to power technology field.
Background technology
Novel ship bank electric system is boats and ships a kind of " green harbour " power supply techniques used while pulling in to shore, the main purpose of ship shore electric power configuration is that power supply is provided while anchoring alongside the shore for boats and ships, because the configuration of this shore electricity should need to configure by the special power supply of boats and ships, guarantee the reliability of ship power supply, requirement should be designed to ship shore electric three-phase three-wire system system accordingly.Yet, if ship shore electric is only pressed three-phase three-wire system system, cannot be to the stationary plant power supply of port and pier, when port and pier do not have boats and ships to pull in to shore to use, bank electric system can only be in idle state, less economical, not only causes equipment waste, and idle equipment very easily damages for a long time, the workload of Maintenance and Repair is very large.Therefore the ship shore electric technology of, studying a kind of compatible land electricity consumption and marine electric is of great immediate significance and practical value.
Whether IT system can allot neutral conductor, the equal imperfection of discussion in international standard and various countries' national standard, industry standard.International Electrotechnical Commission is as far back as standard IEC 364-4-473(1977) strong suggestion IT system should not allotted neutral conductor (Electrical installations of buildings-Part 4-43:Protection for safety-Protection against overcurrent in 3.2.2 bar, 431. 2. 2 (473. 3. 2. 2) IT systems, " In IT systems it is strongly recommended that the neutral conductor should not be distributed. "), but emphasized " in the place that has neutral conductor to allot, on the neutral conductor in every loop, generally need to install overcurrent detects, be used for making comprising all live wire power-off of the corresponding circuit of neutral conductor ".Although in versions in 2008 of up-to-date modification, this suggestion is modified to " NOTE ", but still exist.And the exposed conductive part that in IEC60364-1-2005,312.2.3 only limits to equipment for the description of IT system line system is to concentrate ground connection or independent grounding, the requirement of allotting for neutral conductor is: " neutral conductor can be allotted, and also can not allot." electric device, protection against electric shock part (GB14821.1-93) 7.1.5.6 bar of protecting human body part and CNS building in < < low-voltage distribution electrical design installation manual (2008 the 4th edition) the > > of ABB AB, all row have been write the IT system protective condition of allotting neutral conductor and have been allotted neutral conductor IT system the longest break time of fault for the second time separately.The power equipment that Japan Kyoritsu company writes according to IEC60364-6 is measured in guide, IT system is described as to three-phase four-wire system, and illustrates single-phase load cross-over connection between phase conductor and neutral conductor.China-styled Certain Industry Field standard < < design of civil buildings standard (JGJ16-2008) > > 12.2.5.4 bar requires " without specific (special) requirements in the situation that; IT system should not be drawn neutral conductor ", and in 12.2.6 bar, requires " IT system comprise neutral conductor forbid direct ground connection at interior any live part ".
Whether industry standard can allot the restriction of neutral conductor from " suggestion strongly, to NOTE " to IT system, show to allot the direction that neutral conductor IT system technology is WeiLai Technology research and development.
Summary of the invention
The purpose of this utility model is to provide a kind of neutral conductor IT system electric supply installation of allotting, and phase three-wire three power supply can be provided, and can provide three-phase four-wire power again, to meet the compatible land electricity consumption of ship shore electric power configuration and the requirement of marine electric.
The purpose of this utility model is achieved by the following technical programs:
A kind of neutral conductor IT system electric supply installation of allotting, comprise transformer B, circuit breaker Q F2, circuit breaker Q F3, the low-pressure side of described transformer B is drawn a neutral line N, between phase three-wire three power load and transformer B, circuit breaker Q F3 is set, between three-phase and four-line power load and transformer B, circuit breaker Q F2 is set, three-phase four-wire power side adopts the IT system of allotting neutral conductor, and phase three-wire three mains side adopts the IT system of not allotting neutral conductor.
Object of the present invention can also further realize by following technical measures:
The aforementioned neutral conductor IT system electric supply installation of allotting, wherein transformer B selects oil immersed type.
The aforementioned neutral conductor IT system electric supply installation of allotting, is wherein also provided with main breaker QF1 between phase three-wire three side circuit breaker Q F3 and three-phase and four-line side circuit breaker Q F2 and the low-pressure side of transformer B.
Compared with prior art, the beneficial effects of the utility model are: the IT system of allotting center line can provide phase three-wire three power supply and three-phase four-wire power simultaneously, adopt the floating sky of same transformer neutral point is threephase load and single-phase load power supply simultaneously, can directly obtain the power supply of 220V; When there is electrical network single-phase earthing, the short time can in continue to power.The compatible land electricity consumption of ship shore electric power configuration and the requirement of marine electric have been met.
Accompanying drawing explanation
Fig. 1 is system configuration schematic diagram of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
The utility model provides a kind of IT system of allotting neutral conductor, the system schema of phase three-wire three power supply and three-phase four-wire power is provided simultaneously, as shown in Figure 1, electric power system of the present utility model comprises transformer B, main breaker QF1, three-phase four-wire power side circuit breaker Q F2, phase three-wire three mains side circuit breaker Q F3, neutral line N.Phase three-wire three power supply and three-phase four-wire power are in parallel, by main breaker QF1, be connected with step down side, wherein between three-phase four-wire power side load and main breaker QF1, be provided with three-phase four-wire power side circuit breaker Q F2, between phase three-wire three mains side load and main breaker QF1, be provided with phase three-wire three mains side circuit breaker Q F3, phase three-wire three mains side is provided with insulation monitoring and warning device, insulation monitoring and warning device can be monitored phase three-wire three electric power system, and can monitor out neutral line fault, when the transformer generation single-phase earthing of electric power system, according to current/voltage situation of change, differentiate the approximate location of earth point, and start corresponding protective relaying device and report to the police, according to reporting to the police, can artificially selectively cut off being connected of phase three-wire three mains side load and electric power system.
The method of supplying power to of allotting the IT system of neutral conductor of the present utility model is exported N line in IT power supply system, has realized three-phase equipment and single-phase equipment are powered simultaneously.
In concrete enforcement, transformer B selects oil immersed type.
Method of supplying power to of the present utility model is, there is earth fault for the first time in the IT system of allotting neutral conductor, no matter earth point is in phase three-wire three side, or three-phase and four-line side, no matter, on phase conductor or neutral conductor, can continue compatible three-phase three wire system and three-phase four wire system power supply, the normal operation of all devices in not impact system, the fault of phase three-wire three side can not have influence on three-phase and four-line side, and three-phase and four-line side can not have influence on phase three-wire three side yet.Single-phase load is allotted neutral conductor by IT system and is obtained AC220V voltage, simple and reliable for structure.As long as can solve the institute's neutral conductor of allotting protection problem, system is safe.The present invention obtains AC220V voltage by allotted neutral conductor on IT system basis, with a wire, has substituted three single-phase transformers, greatly reduces electric equipment investment, optimization distribution structure, economize on resources, protection of the environment.
In addition to the implementation, the utility model can also have other execution modes, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection range of the utility model requirement.
Claims (3)
1. allot neutral conductor IT system electric supply installation for one kind, it is characterized in that, comprise transformer B, circuit breaker Q F2, circuit breaker Q F3, the low-pressure side of described transformer B is drawn a neutral line N, between phase three-wire three power load and transformer B, circuit breaker Q F3 is set, between three-phase and four-line power load and transformer B, circuit breaker Q F2 is set, three-phase four-wire power side adopts the IT system of allotting neutral conductor, and phase three-wire three mains side adopts the IT system of not allotting neutral conductor.
2. allot as claimed in claim 1 neutral conductor IT system electric supply installation, it is characterized in that, described transformer B selects oil immersed type.
3. allot as claimed in claim 1 or 2 neutral conductor IT system electric supply installation, it is characterized in that, between described phase three-wire three side circuit breaker Q F3 and three-phase and four-line side circuit breaker Q F2 and the low-pressure side of transformer B, be also provided with main breaker QF1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320676625.0U CN203589726U (en) | 2013-10-31 | 2013-10-31 | Power supply device of IT system with distributed neutral conductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320676625.0U CN203589726U (en) | 2013-10-31 | 2013-10-31 | Power supply device of IT system with distributed neutral conductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203589726U true CN203589726U (en) | 2014-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320676625.0U Expired - Lifetime CN203589726U (en) | 2013-10-31 | 2013-10-31 | Power supply device of IT system with distributed neutral conductor |
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| Country | Link |
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| CN (1) | CN203589726U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114825267A (en) * | 2022-03-15 | 2022-07-29 | 许继电源有限公司 | Double-power-system shore power supply system and fault detection method thereof |
-
2013
- 2013-10-31 CN CN201320676625.0U patent/CN203589726U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114825267A (en) * | 2022-03-15 | 2022-07-29 | 许继电源有限公司 | Double-power-system shore power supply system and fault detection method thereof |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140507 |