CN202534942U - Wiring form for air cooling low voltage factory - Google Patents
Wiring form for air cooling low voltage factory Download PDFInfo
- Publication number
- CN202534942U CN202534942U CN2012201708964U CN201220170896U CN202534942U CN 202534942 U CN202534942 U CN 202534942U CN 2012201708964 U CN2012201708964 U CN 2012201708964U CN 201220170896 U CN201220170896 U CN 201220170896U CN 202534942 U CN202534942 U CN 202534942U
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- Prior art keywords
- air cooling
- transformer
- low pressure
- electric power
- incoming line
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Abstract
The utility model relates to a wiring form for an air cooling low voltage factory which is simpler and more reliable. An air cooling transformer A and an air cooling transformer B are arranged in a power distribution room, wherein the low-voltage sides of the two air cooling transformers are connected with a respective air cooling low-voltage section A and a respective air cooling low-voltage section B and the two air cooling transformers share one air cooling standby transformer. The air cooling standby transformer and the air cooling transformer A are arranged at the two sides of the air cooling low-voltage section A in parallel in a single column. The low-voltage side of the air cooling standby transformer is directly connected with an air cooling standby section. The air cooling standby transformer is provided with a set of differential protection. The air cooling standby section is connected with the air cooling low-voltage section and the air cooling low-voltage section B through respective standby power supply branch wiring-in circuit breaker cabinets, wherein no standby branch protection apparatuses are disposed inside the standby power supply branch wiring-in circuit breaker cabinets. When one of the air cooling transformers is broken due to a fault, the air cooling standby transformer comes into service, and the respective standby power supply branch wiring-in circuit breaker is switched on.
Description
Technical field
The utility model relates to a kind of air cooling low pressure station-service connection type of simple economy.
Background technology
Air-cooled Unit is widely used, and mostly power plant's motor with air cooling is low-tension motor at present, and the air cooling electrical system adopts the bright subsequent use mode of connection of low pressure usually.
Air cooling spare transformer of two air cooled transformer configurations; Under the normal operating condition, one section air cooling low pressure stage operation of every air cooled transformer band, each candidate branch electric power incoming line circuit breaker is a gate-dividing state.When wherein air cooled transformer fault disconnection, the air cooling spare transformer comes into operation, corresponding candidate branch electric power incoming line breaker closing.As shown in Figure 1.Existing connection type is described below:
1. the high-pressure side of two air cooled transformers and air cooling spare transformer is connected with middle pressure bus respectively; Low-pressure side is connected with separately air cooling low pressure stage A, air cooling low pressure stage B through corresponding low-voltage circuit breaker cabinet respectively, and air cooling spare transformer low-pressure side is connected with the air cooling dead section through cut-offfing equipment (that is: isolating switch or circuit breaker etc.) cabinet; The candidate branch electric power incoming line of each air cooling low pressure stage draws and is connected to the air cooling dead section, and wherein the candidate branch electric power incoming line comprises that the candidate branch electric power incoming line cut-offs equipment cabinet → cable → candidate branch electric power incoming line breaker cabinet.
2. the main protection equipment allocation plan is: a cover air cooling spare transformer differential protection is set; The current transformer in the medium voltage breaker cabinet is adopted in the differential protection high-pressure side, and low-pressure side adopts air cooling spare transformer low-pressure side to cut-off the current transformer in the equipment cabinet; In addition, each candidate branch electric power incoming line all is provided with a cover candidate branch protective device, and the current transformer of this branch is adopted in protection respectively.
This wiring is at present ripe connection type commonly used, and is comparatively simple on the structure, and flexibly, but it is more with the protective device configuration to cut-off equipment, not only causes cost higher layouts on, and difficult inquiry the after breaking down, and has influenced fault removal efficiency.
The utility model content
Summary of the invention
The purpose of the utility model is exactly in the at present existing wiring; Cut-off the more problem of equipment and protective device configuration; Arrangement in conjunction with the air cooling low-voltage distribution equipment; Propose a kind of more simple and reliable air cooling low pressure station-service connection type, under the situation of reasonable Arrangement, this connection type can be cancelled three covers and cut-off equipment and supporting switch cubicle and two cover candidate branch protective devices.
For realizing above-mentioned purpose, the utility model adopts following technical scheme:
A kind of air cooling low pressure station-service connection type; At switchgear house arrangement air-cooling transformer A and air cooled transformer B; Said two air cooled transformer low-pressure sides are connected the public air cooling spare transformer of said two air cooled transformers with separately air cooling low pressure stage A, air cooling low pressure stage B respectively; The single-row two ends that are arranged in parallel in air cooling low pressure stage A of said air cooling spare transformer and air cooled transformer A, the low-pressure side of air cooling spare transformer directly is connected with the air cooling dead section, and the air cooling spare transformer is provided with a cover differential protection; The air cooling dead section also is connected through candidate branch electric power incoming line breaker cabinet separately with air cooling low pressure stage A, air cooling low pressure stage B, in the candidate branch electric power incoming line breaker cabinet candidate branch protective device is not set; When said wherein air cooled transformer fault was broken off, the air cooling spare transformer came into operation, corresponding candidate branch electric power incoming line breaker closing.
The high-pressure side of said two air cooled transformers, air cooling spare transformer are connected with middle pressure bus respectively; The low-pressure side of two air cooled transformers is connected with separately air cooling low pressure stage A, air cooling low pressure stage B through corresponding low-voltage circuit breaker cabinet respectively.
Said air cooling low pressure stage A, air cooling low pressure stage B stand-by power supply separately also are connected to the air cooling dead section through corresponding candidate branch electric power incoming line breaker cabinet respectively; Wherein the air cooling dead section is installed in the candidate branch electric power incoming line breaker cabinet A, is connected with air cooling low pressure stage B with candidate branch electric power incoming line breaker cabinet B.
The current transformer of high-pressure side breaker cabinet is still adopted in the differential protection high-pressure side of said air cooling spare transformer setting, and low-pressure side then adopts the current transformer in candidate branch electric power incoming line breaker cabinet A and the candidate branch electric power incoming line breaker cabinet B.In candidate branch electric power incoming line breaker cabinet A and the candidate branch electric power incoming line breaker cabinet B candidate branch protective device is not set.
The beneficial effect of the utility model is: under the situation of reasonable Arrangement, new connection type is simple and reliable, and cancels three covers and cut-off equipment (that is: isolating switch or circuit breaker etc.) and supporting switch cubicle and two cover candidate branch protective devices; Differential protection is the equipment that needs the electric current input of high pressure and low pressure both sides to use; Also be that a cover differential protection only is set in the background technology; The emphasis that the present invention is different with background technology is that the low-pressure side of differential protection adopts the current transformer input current in two candidate branch lead-in circuit breaker cabinets, so just can cancel two candidate branch protective devices; The cancellation cable connection adopts the busbar ways of connecting also to reduce the workload of probability of failure and repair and maintenance; Simultaneously, on arranging, reduce the length of switchgear house, reduced civil engineering cost.
Description of drawings
Fig. 1 is existing connection type;
Fig. 2 is the layout plan of the utility model in switchgear house;
Fig. 3 is the connection type figure of the utility model.
Wherein, 1. air cooled transformer A, 2. air cooled transformer B, 3. air cooling spare transformer, 4. air cooling low pressure stage A; 5. air cooling low pressure stage B, 6. air cooling dead section, 7. bus bridge, 8. cable is pressed bus in 9.; 10. cut-off equipment cabinet, 11. low-voltage circuit breaker cabinets, 12. candidate branch electric power incoming line breaker cabinet A, 13. candidate branch electric power incoming line breaker cabinet B; 14. differential protection, 15. current transformers, 16. high-pressure side breaker cabinets, 17. branch's protective devices.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Among Fig. 2, Fig. 3, in switchgear house with aspectant mode arrangement air-cooling transformer A1 and air cooled transformer B2, air cooling spare transformer 3 and the single-row air cooling low pressure stage A4 two ends that are arranged in parallel in of air cooled transformer A1.
The high-pressure side of said two air cooled transformers is connected with middle pressure bus 9 respectively; Low-pressure side is connected with separately air cooling low pressure stage A4, air cooling low pressure stage B5 through corresponding low-voltage circuit breaker cabinet 11 respectively, and while air cooling low pressure stage A4, air cooling low pressure stage B5 stand-by power supply separately also are connected to air cooling dead section 6 through corresponding candidate branch electric power incoming line breaker cabinet respectively; The public air cooling spare transformer 3 of said two air cooled transformers; Said air cooling spare transformer 3 high-pressure sides are connected with middle pressure bus 9; Low-pressure side then directly is connected with air cooling dead section 6; Air cooling dead section 6 is installed in the candidate branch electric power incoming line breaker cabinet A12, and air cooling dead section 6 also is connected with air cooling low pressure stage B5 with candidate branch electric power incoming line breaker cabinet B13 through bus bridge 7 simultaneously; When said wherein air cooled transformer fault was broken off, air cooling spare transformer 3 came into operation, corresponding candidate branch electric power incoming line breaker closing.
The low-pressure side of said air cooling spare transformer 3 is not provided with any equipment that cut-offs and directly is connected to air cooling dead section 6; The candidate branch electric power incoming line of air cooling low pressure stage A4 is merely candidate branch electric power incoming line breaker cabinet A12, and the candidate branch electric power incoming line of air cooling low pressure stage B5 only comprises bus bridge 7 and candidate branch electric power incoming line breaker cabinet B13.
Said air cooling spare transformer 3 is provided with a cover differential protection 14; The current transformer 15 of high-pressure side breaker cabinet 16 is still adopted in the differential protection high-pressure side, and low-pressure side then adopts the current transformer 15 in candidate branch electric power incoming line breaker cabinet A12 and the candidate branch electric power incoming line breaker cabinet B13.In candidate branch electric power incoming line breaker cabinet A12 and the candidate branch electric power incoming line breaker cabinet B13 candidate branch protective device 17 is not set.
Claims (4)
1. air cooling low pressure station-service connection type; It is characterized in that; At switchgear house arrangement air-cooling transformer A and air cooled transformer B, said two air cooled transformer low-pressure sides are connected the public air cooling spare transformer of said two air cooled transformers with separately air cooling low pressure stage A, air cooling low pressure stage B respectively; The single-row two ends that are arranged in parallel in air cooling low pressure stage A of said air cooling spare transformer and air cooled transformer A, the low-pressure side of air cooling spare transformer directly is connected with the air cooling dead section, and the air cooling spare transformer is provided with a cover differential protection; The air cooling dead section also is connected through candidate branch electric power incoming line breaker cabinet separately with air cooling low pressure stage A, air cooling low pressure stage B, in the candidate branch electric power incoming line breaker cabinet candidate branch protective device is not set; When said wherein air cooled transformer fault was broken off, the air cooling spare transformer came into operation, corresponding candidate branch electric power incoming line breaker closing.
2. air cooling low pressure station-service connection type as claimed in claim 1 is characterized in that the high-pressure side of said two air cooled transformers, air cooling spare transformer are connected with middle pressure bus respectively; The low-pressure side of two air cooled transformers is connected with separately air cooling low pressure stage A, air cooling low pressure stage B through corresponding low-voltage circuit breaker cabinet respectively.
3. air cooling low pressure station-service connection type as claimed in claim 1; It is characterized in that; Said air cooling low pressure stage A, air cooling low pressure stage B stand-by power supply separately also are connected to the air cooling dead section through corresponding candidate branch electric power incoming line breaker cabinet respectively; Wherein the air cooling dead section is installed in the candidate branch electric power incoming line breaker cabinet A, is connected with air cooling low pressure stage B with candidate branch electric power incoming line breaker cabinet B.
4. air cooling low pressure station-service connection type as claimed in claim 1; It is characterized in that; The current transformer of high-pressure side breaker cabinet is still adopted in the differential protection high-pressure side of said air cooling spare transformer setting; Current transformer in candidate branch electric power incoming line breaker cabinet A and the candidate branch electric power incoming line breaker cabinet B is not provided with the candidate branch protective device in candidate branch electric power incoming line breaker cabinet A and the candidate branch electric power incoming line breaker cabinet B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201708964U CN202534942U (en) | 2012-04-20 | 2012-04-20 | Wiring form for air cooling low voltage factory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201708964U CN202534942U (en) | 2012-04-20 | 2012-04-20 | Wiring form for air cooling low voltage factory |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202534942U true CN202534942U (en) | 2012-11-14 |
Family
ID=47136100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201708964U Expired - Lifetime CN202534942U (en) | 2012-04-20 | 2012-04-20 | Wiring form for air cooling low voltage factory |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202534942U (en) |
-
2012
- 2012-04-20 CN CN2012201708964U patent/CN202534942U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121114 |