CN207441441U - Control the unbalanced lead arrangement of D.C. resistance - Google Patents
Control the unbalanced lead arrangement of D.C. resistance Download PDFInfo
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- CN207441441U CN207441441U CN201721375730.5U CN201721375730U CN207441441U CN 207441441 U CN207441441 U CN 207441441U CN 201721375730 U CN201721375730 U CN 201721375730U CN 207441441 U CN207441441 U CN 207441441U
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- copper bar
- resistance
- neutral point
- notch
- phase
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Abstract
The utility model discloses a kind of control unbalanced lead arrangements of D.C. resistance, belong to field transformer.The utility model includes first head copper bar and tail head copper bar, and the first head copper bar includes a phases copper bar, b phases copper bar and c phase copper bars, and the tail head copper bar is low pressure neutral point copper bar；Notch is opened up on the low pressure neutral point copper bar；A phase lines are drawn by a phases copper bar, and a phase line tail heads x is connected to the left end of the low pressure neutral point copper bar；B phase lines are drawn by the b phases copper bar, and b phase line tail heads y is connected to the upside of the notch；C phase lines are drawn by the c phases copper bar, and c phase line tail heads z is connected to the right end of the low pressure neutral point copper bar；0 tail head of neutral lead is connected to the downside of the notch.It is uneven that the utility model can be very good control D.C. resistance；And it is simple for process, it is easily operated, it is cost-effective, securely and reliably, linear beauty, and transformer station high-voltage side bus performance can be improved.
Description
Technical field
The utility model is related to field transformer, more particularly to a kind of unbalanced lead arrangement knot of control D.C. resistance
Structure.
Background technology
In the prior art, due to low-voltage and high-current caused by resistance unbalance rate beyond requirements of the national standard be one general
All over phenomenon, this problem annoyings transformer production producer and user always.
At this stage, reasonable value is reached, it is necessary to increase low-voltage copper bar size, so as to add material for guarantee resistance unbalance rate
Material consumption and occupied space, increase overall weight and volume, both waste of materials, increase cost, and wasting space.
A kind of effective scheme for solving D.C. resistance imbalance problem is developed to be a problem to be solved.
Utility model content
In order to make up for the deficiencies of the prior art, improve resistance unbalance caused by due to low-voltage and high-current, improve transformation
The running quality and economic benefit of device, the utility model provide a kind of control unbalanced lead arrangement of D.C. resistance.
The technical solution of the utility model is：
A kind of control unbalanced lead arrangement of D.C. resistance, including first head copper bar and tail head copper bar, the first head
Copper bar includes a phases copper bar, b phases copper bar and c phase copper bars, and the tail head copper bar is low pressure neutral point copper bar；The low pressure neutral point
Notch is opened up on copper bar；A phase lines are drawn by a phases copper bar, and a phase line tail heads x is connected to a left side for the low pressure neutral point copper bar
End；B phase lines are drawn by the b phases copper bar, and b phase line tail heads y is connected to the upside of the notch；C phase lines are drawn by the c phases copper bar
Go out, c phase line tail heads z is connected to the right end of the low pressure neutral point copper bar；0 tail head of neutral lead is connected to the notch
Downside.
Preferably, the b phase lines tail head y is oppositely arranged with 0 tail head of neutral lead.
Preferably, the width of the notch is more than 8mm.
Preferably, a phase lines tail head x is soldered to the left end of the low pressure neutral point copper bar；B phase line tail heads y is welded
To the upside of the notch；C phase line tail heads z is soldered to the right end of the low pressure neutral point copper bar；0 tail head of neutral lead welds
It is connected to the downside of the notch.
Preferably, insulating board is set between the neutral lead 0 and notch.
Further, the insulating board uses insulating tape banding fixed.
The beneficial effects of the utility model are：
Therefore, it is uneven to can be very good control D.C. resistance for the utility model lead arrangement；And it is simple for process, easily
It is cost-effective in operation, securely and reliably, linear beauty, and transformer station high-voltage side bus performance can be improved.
Description of the drawings
It in order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property
It puts, can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the structure diagram that the utility model controls the unbalanced lead arrangement of D.C. resistance；
Fig. 2 is the principle schematic that the utility model controls the unbalanced lead arrangement of D.C. resistance；
Fig. 3 is the structure diagram of lead arrangement in the prior art；
Fig. 4 is the principle schematic of lead arrangement in the prior art.
Specific embodiment
Comparative example 1
As shown in Figure 3, Figure 4, existing transformer is equipped with a phases copper bar 1, b phases copper bar 2 and c phases copper bar 3, a phases copper bar 1, b
Head copper bar headed by phase copper bar 2 and c phases 3 rows of copper are equal.First head copper bar is fixed on transformer, low-voltage lead folder 4 by low-voltage lead folder 4
It is surrounded by insulation board 5.Low pressure neutral point copper bar 9 is used as tail head copper bar.
A phase lines, b phase lines and c phase lines are drawn respectively by a phases copper bar 1, b phases copper bar 2 and 3 row of c phases copper, a phase line tail heads x, b
Phase line tail head y and c phase line tail head z is respectively connected to right end, centre and the left end of low pressure neutral point copper bar 9.Neutral lead 0
It is connected to low pressure neutral point copper bar.
As shown in figure 4, in figure, Ra-a, Rb-b, Rc-c are respectively the resistance of a phases copper bar 1, b phases copper bar 2 and c phases copper bar 3；
Ra-r, Rb-r, Rc-r are respectively coil a, coil b, the resistance of coil c；R0-0 is neutral point lead resistance；Two 2R are tail head
The resistance of copper bar.Due to being not provided with notch, R on low pressure neutral point copper bar 9c – RaDifference is larger, is susceptible to resistance unbalance
Situation.
Existing lead D.C. resistance theory deduction：
Ra= Ra-a+ Ra-r+Rx-0 +Ro-o ,Rb= Rb-b+ Rb-r+Ry-0+ Ro-o ,
Rc= Rc-c+ Rc-r+Rz-0+ Ro-o, R in formulaa-r≈Rb-r≈Rc-r；
Neutral point bus bar resistance is as shown in figure 4,0 phase pinout connector slides on resistance 2R;
When sliding into right end：
Rx-0= 0,Ry-o= 2R , Rz-0= 4R ,Rc– Ra = Rc-c–Ra-a+4R；
Rule of thumb, R is takenc-c–Ra-a=0.35R, then Rc – Ra=4.35R；
When sliding into centre：
Rx-0= R,Ry-o= R , Rz-0= 3R ,Rc– Ra = Rc-c–Ra-a+2R；
Rule of thumb, R is takenc-c–Ra-a=0.35R, then Rc – Ra=2.35R；
When sliding into left：
Rx-0= 2R,Ry-o= 0 , Rz-0=2R rule of thumb, takes Rc-c–Ra-a=0.35R, then Rc – Ra=2.35R；To sum up
Analysis, existing wire structures, three-phase resistance difference is in 2.35-4.35R, and difference is larger, and resistance is seriously uneven.
Embodiment 1
As shown in Figure 1 and Figure 2, a kind of control unbalanced lead arrangement of D.C. resistance, including first head copper bar and tail head
Copper bar, first head copper bar include a phases copper bar 1, b phases copper bar 2 and c phases copper bar 3, and tail head copper bar is low pressure neutral point copper bar 9；In low pressure
Property point copper bar 9 on open up strip notch 8, the width of notch 8 is more than 8mm（If too narrow, easily it is connected or leaves at notch
Weld object）；The left end of notch 8 does not arrive at the left end of low pressure neutral point copper bar 9, and the right end of notch 8 does not arrive at low pressure neutral point copper
The right end of row 9.
A phase lines are drawn by a phases copper bar 1, and a phase line tail heads x is soldered to the left end of low pressure neutral point copper bar 9；B phase lines are by b phases
2 row of copper draws, and b phase line tail heads y is soldered to the upside of notch 8；C phase lines are drawn by c phases copper bar 3, and c phase line tail heads z is soldered to low
Press the right end of neutral point copper bar 9；The tail head of neutral lead 06 is soldered to the downside of notch 8.B phase lines tail head y and neutral point
0 tail head of lead-out wire is oppositely arranged.
It is short-circuit in order to prevent, insulating board is set between neutral lead 06 and notch 8 or low pressure neutral point copper bar 9
7.Insulating board 7 uses insulating tape banding fixed.
As shown in Fig. 2, in figure, Ra-a, Rb-b, Rc-c are respectively the resistance of a phases copper bar 1, b phases copper bar 2 and c phases copper bar 3；
Ra-r, Rb-r, Rc-r are respectively coil a, coil b, the resistance of coil c；R0-0 is neutral point lead resistance；Four decile R are
The resistance of tail head copper bar.
The utility model lead D.C. resistance theory deduction：
Ra= Ra-a+ Ra-r+ Rx-o+ Ro-o ,Rb= Rb-b+ Rb-r+Ry-o + Ro-o ,
Rc= Rc-c+ Rc-r+Rz-o+ Ro-o, R in formulaa-r≈Rb-r≈Rc-r；
Low pressure neutral point copper bar 9 is divided into the equal quarter of resistance value, every part is R, then has：
Rx-z= R , Rx-o=Rz-o= 0.75R , Ry-o= R , Ra= Rc ,Ra – Rb = Ra-a–Rb-b–0.25R；
Rule of thumb, under normal circumstances, Ra-aAnd Rb-bThe R of difference≤1/3, therefore take Ra-a–Rb-b=0.35R, Ra – Rb≤
0.1R has experience calculating to know (Ra+ Rb + Rc)/3 >=10R, therefore phase resistance unbalance factor is up to 1%.
Therefore, it is uneven to can be very good control D.C. resistance for the utility model lead arrangement；And it is simple for process, easily
It is cost-effective in operation, improve transformer station high-voltage side bus performance.
The utility model is suitable for the power transformer of three-phase Y connection low-voltage, high-current.
Claims (6)
1. a kind of control unbalanced lead arrangement of D.C. resistance, including first head copper bar and tail head copper bar, the first head copper
Row includes a phases copper bar, b phases copper bar and c phase copper bars, and the tail head copper bar is low pressure neutral point copper bar；It is characterized in that：It is described low
Notch is opened up on pressure neutral point copper bar；A phase lines are drawn by a phases copper bar, and a phase line tail heads x is connected to the low pressure neutral point
The left end of copper bar；B phase lines are drawn by the b phases copper bar, and b phase line tail heads y is connected to the upside of the notch；C phase lines are by the c
Phase copper bar is drawn, and c phase line tail heads z is connected to the right end of the low pressure neutral point copper bar；0 tail head of neutral lead is connected to institute
State the downside of notch.
2. the control unbalanced lead arrangement of D.C. resistance as described in claim 1, it is characterised in that：The b phase lines tail
Head y is oppositely arranged with 0 tail head of neutral lead.
3. the control unbalanced lead arrangement of D.C. resistance as described in claim 1, it is characterised in that：The width of the notch
Degree is more than 8mm.
4. the control unbalanced lead arrangement of D.C. resistance as described in claim 1, it is characterised in that：A phase line tail heads x
It is soldered to the left end of the low pressure neutral point copper bar；B phase line tail heads y is soldered to the upside of the notch；C phase line tail heads z is welded
To the right end of the low pressure neutral point copper bar；0 tail head of neutral lead is soldered to the downside of the notch.
5. the control unbalanced lead arrangement of D.C. resistance as described in claim 1, it is characterised in that：The neutral point draws
Insulating board is set between outlet 0 and notch.
6. the control unbalanced lead arrangement of D.C. resistance as claimed in claim 5, it is characterised in that：The insulating board
Using insulating tape banding fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721375730.5U CN207441441U (en) | 2017-10-24 | 2017-10-24 | Control the unbalanced lead arrangement of D.C. resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721375730.5U CN207441441U (en) | 2017-10-24 | 2017-10-24 | Control the unbalanced lead arrangement of D.C. resistance |
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| Publication Number | Publication Date |
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| CN207441441U true CN207441441U (en) | 2018-06-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107680785A (en) * | 2017-10-24 | 2018-02-09 | 山东达驰电气有限公司 | Control the unbalanced lead arrangement of D.C. resistance |
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2017
- 2017-10-24 CN CN201721375730.5U patent/CN207441441U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107680785A (en) * | 2017-10-24 | 2018-02-09 | 山东达驰电气有限公司 | Control the unbalanced lead arrangement of D.C. resistance |
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Effective date of registration: 20200806 Granted publication date: 20180601 |
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Date of cancellation: 20200821 Granted publication date: 20180601 |
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