CN205070174U - Power supply unit of three -way system of three -phase - Google Patents
Power supply unit of three -way system of three -phase Download PDFInfo
- Publication number
- CN205070174U CN205070174U CN201520849287.5U CN201520849287U CN205070174U CN 205070174 U CN205070174 U CN 205070174U CN 201520849287 U CN201520849287 U CN 201520849287U CN 205070174 U CN205070174 U CN 205070174U
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- CN
- China
- Prior art keywords
- phase
- supply unit
- power supply
- current transformer
- isolation transformer
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- 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.)
- Expired - Fee Related
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- 238000002955 isolation Methods 0.000 claims abstract description 14
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model relates to a power supply unit of three -way system of three -phase, including switch board and automatically controlled cabinet, the switch board with automatically controlled cabinet passes through cable junction, be equipped with the three -way generating line of three -phase, low pressure air circuit breaker, three -phase current transformer and three -phase isolation transformer in the switch board, the three -way generating line of three -phase is connected low pressure air circuit breaker, low pressure air circuit breaker connects three -phase current transformer, three -phase current transformer connects three -phase isolation transformer. The beneficial effects of the utility model are that: needing the fourwire consumer of three -phase to fragmentary load, in three -phase three -way system, installing isolation transformer simple accurate additional, the cost is practiced thrift in convenient wiring, and it is convenient to overhaul, the isolation transformer capacity is less, enough installs in the switch board, does not influence arranging of other components and parts, guarantees the safe and reliable of power supply unit.
Description
Technical field
The utility model relates to a kind of power supply unit, is specifically related to a kind of in three-phase three wire system, ensures the power supply unit of three-phase and four-line.
Background technology
Generally, low pressure 380V electric power system adopts three-phase four-wire system more.But in three-phase three wire system, during the three-phase and four-line of power consumption equipment if desired 380/220V, must change on the bus section, busbar section of electrical system power center (PC) or motor control center (MCC), meet the instructions for use of power consumption equipment, this method cost is high, more complicated.Its system of user also had is exactly three-phase three wire system, does not allow to change.
Utility model content
For the problems referred to above, the utility model provides a kind of in three-phase three wire system, ensures the power supply unit of three-phase and four-line.
For achieving the above object, the utility model provides a kind of power supply unit of three-phase three wire system, it is characterized in that, comprise power distribution cabinet and electrical control cubicles, described power distribution cabinet is connected by cable with described electrical control cubicles, phase three-wire three bus, lv air breaker, threephase current transformer and three-phase isolation transformer is provided with in described power distribution cabinet, described phase three-wire three bus connects described lv air breaker, described lv air breaker connects described threephase current transformer, and described threephase current transformer connects described three-phase isolation transformer.
Improve further as the utility model, described cable is three-phase four core cable.
Improve further as the utility model, described three-phase three wire system is 380V three-phase three wire system.
The beneficial effects of the utility model are:
1, fragmentary load is needed to the power consumption equipment of three-phase and four-line, in three-phase three wire system, install isolating transformer additional simple and easy to do, facilitate wiring, cost-saving, maintenance is convenient;
2, isolating transformer capacity is less, is enough arranged in power distribution cabinet, does not affect the layout of other components and parts, ensures the safe and reliable of power supply unit.
Accompanying drawing explanation
Fig. 1 is the structural representation of the power supply unit of a kind of three-phase three wire system of the utility model;
1, power distribution cabinet; 2, phase three-wire three bus; 3, lv air breaker; 4, threephase current transformer; 5, three-phase isolation transformer; 6, electrical control cubicles.
Embodiment
As shown in Figure 1, the power supply unit of a kind of three-phase three wire system described in the utility model embodiment, comprise power distribution cabinet 1 and electrical control cubicles 6, power distribution cabinet 1 is connected by cable with electrical control cubicles 6, phase three-wire three bus 2, lv air breaker 3, threephase current transformer 4 and three-phase isolation transformer 5 is provided with in power distribution cabinet 1, phase three-wire three bus 2 connects lv air breaker 3, and lv air breaker 3 connects threephase current transformer 4, and threephase current transformer 4 connects three-phase isolation transformer 5.
During concrete use: the single loop in the power distribution cabinet 1 in 380V three-phase three wire system is drawn and met place, installs the small three-phase isolating transformer 5 of suitable capacity additional, after isolation becomes, cause power consumption equipment with three-phase four core cable from power distribution cabinet 1.The neutral line draws from three-phase isolation transformer 5 neutral point and connects.Three-phase isolation transformer 5 capacity is less, is enough arranged in power distribution cabinet 1, does not affect the layout of other components and parts, ensures the safe and reliable of power supply unit.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (3)
1. the power supply unit of a three-phase three wire system, it is characterized in that, comprise power distribution cabinet (1) and electrical control cubicles (6), described power distribution cabinet (1) is connected by cable with described electrical control cubicles (6), phase three-wire three bus (2) is provided with in described power distribution cabinet (1), lv air breaker (3), threephase current transformer (4) and three-phase isolation transformer (5), described phase three-wire three bus (2) connects described lv air breaker (3), described lv air breaker (3) connects described threephase current transformer (4), described threephase current transformer (4) connects described three-phase isolation transformer (5).
2. power supply unit according to claim 1, is characterized in that: described cable is three-phase four core cable.
3. power supply unit according to claim 1, is characterized in that, described three-phase three wire system is 380V three-phase three wire system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520849287.5U CN205070174U (en) | 2015-10-29 | 2015-10-29 | Power supply unit of three -way system of three -phase |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520849287.5U CN205070174U (en) | 2015-10-29 | 2015-10-29 | Power supply unit of three -way system of three -phase |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205070174U true CN205070174U (en) | 2016-03-02 |
Family
ID=55396683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520849287.5U Expired - Fee Related CN205070174U (en) | 2015-10-29 | 2015-10-29 | Power supply unit of three -way system of three -phase |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205070174U (en) |
-
2015
- 2015-10-29 CN CN201520849287.5U patent/CN205070174U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160302 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |