CN203707798U - Line-side soft start circuit of converter - Google Patents
Line-side soft start circuit of converter Download PDFInfo
- Publication number
- CN203707798U CN203707798U CN201320855736.8U CN201320855736U CN203707798U CN 203707798 U CN203707798 U CN 203707798U CN 201320855736 U CN201320855736 U CN 201320855736U CN 203707798 U CN203707798 U CN 203707798U
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- circuit
- fuse
- side soft
- soft starting
- net side
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Abstract
The utility model relates to the line-side soft start circuit of a converter, which comprises a resistor R, a contactor K and a grid-connected circuit breaker Q1. The two ends of the grid-connected circuit breaker Q1 are respectively connected with a transformer T1 and a back-end circuit. The resistor R and the contactor K are connected in series and then are connected in parallel with the two ends of the grid-connected circuit breaker Q1. In addition, the circuit also comprises a fuse F. The fuses F is connected in series with a series circuit composed of the resistor R and the contactor K. According to the technical scheme of the utility model, the fuse F is additionally arranged in the line-side soft start circuit. In this way, when the line-side soft start circuit or the back-end circuit of the converter is shorted, the shorted circuit can be automatically cut off by means of the fuse F. Therefore, the reliability of the short-circuit protection effect is improved. The circuit is only additionally provided with the fuse F, so that the circuit is simple in implementation.
Description
Technical field
The utility model relates to field of power electronics, refers to especially a kind of soft starting circuit, especially a kind of net side soft starting circuit of current transformer.
Background technology
As shown in Figure 1; the net side soft starting circuit arranging in existing current transformer is mainly by softly opening resistance R, softly opening contactor K and grid-connected circuit breaker Q 1 forms; and softly open contactor K and the soft resistance R that opens is connected in parallel on grid-connected circuit breaker Q 1 two ends; when short trouble appears in the back-end circuit in net side soft starting circuit or current transformer; will be by short circuit with being connected of transformer T1 in current transformer; now grid-connected circuit breaker Q 1 cannot play a protective role; and the breaking capacity of contactor K is limited; faulty circuit cannot reliably be cut off, and will cause serious consequence to transformer T1 and even electrical network.
Utility model content
The purpose of this utility model is for the problems referred to above, and a kind of net side soft starting circuit simple, the high current transformer of reliability of realizing is provided.
For achieving the above object, the utility model provides a kind of net side soft starting circuit of current transformer, comprise resistance R, contactor K and grid-connected circuit breaker Q 1, described grid-connected circuit breaker Q 1 two ends connection transformer T1 and back-end circuit respectively, described resistance R is parallel to circuit breaker Q 1 two ends after connecting with contactor K, in addition, this net side soft starting circuit also comprises fuse F, and described fuse F is connected in the series circuit of resistance R and contactor K.
The net side soft starting circuit of above-mentioned current transformer, also comprises isolating switch Q2, and described isolating switch Q2 is connected in the series circuit of resistance R, contactor K and fuse F.
The net side soft starting circuit of above-mentioned current transformer, wherein, the built-in fuse F of described isolating switch Q2.
The net side soft starting circuit of above-mentioned current transformer, wherein, described isolating switch Q2 external fuse F.
The net side soft starting circuit of above-mentioned current transformer, wherein, described isolating switch Q2 is provided with motor-operating mechanism.
The net side soft starting circuit of above-mentioned current transformer, wherein, described isolating switch Q2 is provided with auxiliary contact.
Compared with prior art; the utility model has the advantage of: by increase fuse F in net side soft starting circuit; when short trouble appears in the back-end circuit in net side soft starting circuit or current transformer; fuse F is cutting-off of short-circuit circuit automatically; improve the reliability of short-circuit protection; due to as long as increase fuse F in circuit, realize simple.
Brief description of the drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the schematic diagram of existing net side soft starting circuit;
The embodiment of the net side soft starting circuit of the current transformer that Fig. 2 provides for the utility model;
The another embodiment of the net side soft starting circuit of the current transformer that Fig. 3 provides for the utility model;
Wherein: 1. current transformer, 11. net side soft starting circuits, 12. back-end circuit.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiment.Based on the embodiment in the utility model, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite of not making creative work, belongs to the scope that the utility model is protected.
As shown in Figure 2, the net side soft starting circuit 11 of the current transformer 1 that the utility model provides, comprise resistance R, contactor K and grid-connected circuit breaker Q 1, described grid-connected circuit breaker Q 1 two ends connection transformer T1 and back-end circuit 12 respectively, described resistance R is parallel to circuit breaker Q 1 two ends after connecting successively with contactor K, and fuse F also connects in the series circuit of described resistance R and contactor K, in side circuit, series connection fuse F is near transformer T1 side, strictly connect by position of components relation as shown in Figure 2, even if there is short trouble in the back-end circuit 12 in net side soft starting circuit 11 or current transformer 1 like this, also cutting-off of short-circuit circuit automatically of fuse F, improve the reliability of short-circuit protection, in circuit, increase fuse F owing to needing only, realize simple.Because fuse F is airtight static protection device, therefore, under the condition that there is no care and maintenance, also can provide long-acting and reliable short-circuit protection to the circuit on side of overhead contact line of current transformer 1 (as transformer and electrical network).Because the ampere-time characteristic curve of fuse F has inverse time lag feature, i.e. overload current hour, fusing time is long; when overload current is large, fusing time is short, therefore within the scope of certain overload current; in the time that electric current recovers normal, fuse F can not fuse, and has improved the accuracy of short-circuit protection.
As shown in Figure 3, the net side soft starting circuit 11 of the current transformer 1 that the utility model provides also comprises isolating switch Q2, this isolating switch Q2 is connected in the series circuit of resistance R, contactor K and fuse F, in side circuit, isolating switch Q2 is near transformer T1 side, strictly connect by position of components relation as shown in Figure 3, this isolating switch Q2 can internal or external fuse F.In the time of repair and maintenance circuit, operating grip that can manual operation isolating switch Q2, the pressure that realizes isolating switch Q2 main contact disconnects, the net side soft starting circuit 11 of forcing to realize current transformer 1 and transformer T1 reliable isolation, the fail safe that improves repair and maintenance.In addition, isolating switch Q2 also can be provided with motor-operating mechanism, disconnection and the closure of far distance controlled isolating switch Q2; Isolating switch Q2 sets up the auxiliary contact that are connected to controller if, the disconnection by these auxiliary contact and closed on off operating mode that can feedback net side soft starting circuit 11.
Compared with prior art; the net side soft starting circuit 11 of the current transformer 1 that the utility model provides; by increase fuse F in net side soft starting circuit 11; when short trouble appears in the back-end circuit 12 in net side soft starting circuit 11 or current transformer 1; fuse F is cutting-off of short-circuit circuit automatically; improve the reliability of short-circuit protection, due to as long as increase fuse F in circuit, realized simple.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (6)
1. the net side soft starting circuit of a current transformer, comprise resistance R, contactor K and grid-connected circuit breaker Q 1, described grid-connected circuit breaker Q 1 two ends connection transformer T1 and back-end circuit respectively, described resistance R is parallel to circuit breaker Q 1 two ends after connecting with contactor K, it is characterized in that, also comprise fuse F, described fuse F is connected in the series circuit of resistance R and contactor K.
2. the net side soft starting circuit of current transformer according to claim 1, is characterized in that, also comprises isolating switch Q2, and described isolating switch Q2 is connected in the series circuit of resistance R, contactor K and fuse F.
3. the net side soft starting circuit of current transformer according to claim 2, is characterized in that, the built-in fuse F of described isolating switch Q2.
4. the net side soft starting circuit of current transformer according to claim 2, is characterized in that, described isolating switch Q2 external fuse F.
5. according to the net side soft starting circuit of the current transformer described in any one in claim 2-4, it is characterized in that, described isolating switch Q2 is provided with motor-operating mechanism.
6. according to the net side soft starting circuit of the current transformer described in any one in claim 2-4, it is characterized in that, described isolating switch Q2 is provided with auxiliary contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320855736.8U CN203707798U (en) | 2013-12-20 | 2013-12-20 | Line-side soft start circuit of converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320855736.8U CN203707798U (en) | 2013-12-20 | 2013-12-20 | Line-side soft start circuit of converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203707798U true CN203707798U (en) | 2014-07-09 |
Family
ID=51058180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320855736.8U Expired - Fee Related CN203707798U (en) | 2013-12-20 | 2013-12-20 | Line-side soft start circuit of converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203707798U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106711924A (en) * | 2017-02-16 | 2017-05-24 | 西安科技大学 | Device for suppressing capacitive load closing inrush current and breaking overvoltage and method thereof |
| CN114365366A (en) * | 2019-09-05 | 2022-04-15 | 斯堪尼亚商用车有限公司 | Battery terminal box and battery pack for vehicle |
-
2013
- 2013-12-20 CN CN201320855736.8U patent/CN203707798U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106711924A (en) * | 2017-02-16 | 2017-05-24 | 西安科技大学 | Device for suppressing capacitive load closing inrush current and breaking overvoltage and method thereof |
| CN106711924B (en) * | 2017-02-16 | 2018-01-23 | 西安科技大学 | A kind of suppression capacitive load closes the device and method for shoving and cut-offfing overvoltage |
| CN114365366A (en) * | 2019-09-05 | 2022-04-15 | 斯堪尼亚商用车有限公司 | Battery terminal box and battery pack for vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160113 Address after: 401147, 29 Longshan Road, 68 Longshan street, Chongqing, Yubei District Patentee after: Chongqing Peite Electrical Co., Ltd. Address before: 314500 Tongxiang City, Jiaxing Province, near the South Ring Road No. 1320, No. Patentee before: Zhejiang Haide New Energy Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140709 Termination date: 20161220 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |