CN2545740Y - Turn-adjusting arc-extinguishing winding with trimming function - Google Patents
Turn-adjusting arc-extinguishing winding with trimming function Download PDFInfo
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- CN2545740Y CN2545740Y CN 02237031 CN02237031U CN2545740Y CN 2545740 Y CN2545740 Y CN 2545740Y CN 02237031 CN02237031 CN 02237031 CN 02237031 U CN02237031 U CN 02237031U CN 2545740 Y CN2545740 Y CN 2545740Y
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- coil
- switch
- turn
- arc suppression
- inductance
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Abstract
The utility model relates to a turn-adjusting arc-extinguishing coil with a trimming function, which comprises a loop type iron core, an inductance coil wound on the secondary magnetic leg of the loop type iron core and a shorting switch K for regulating inductance of the coil. The utility model is characterized in that an alignment coil with multiple taps is arranged in series on one end of the inductance coil. A tapping switch is arranged and one end of the tapping switch is connected with the other end of the alignment coil; the other end of the tapping switch is connected with a plurality of taps of the alignment coil respectively. A switch K3 is connected with two ends of the alignment coil. The control unit of the switch K3 is connected with a fault detector. The utility model has the advantage that 1% of regulation of gear position of the arc-suppression coil can be realized, which can easily realize that the earth current is confined within self-extinguishing range during system failure.
Description
Technical field
The utility model relates to a kind of arc suppression coil that is used for power distribution network centre-point earth, particularly a kind of turn-adjusting arc suppression coil with fine adjustment function.
Background technology
In 3～60kV of isolated neutral system, the single phase ground fault ratio is very big, if ground arc can put out certainly, just can not form the tripping operation accident, otherwise need between system neutral and ground, insert arc suppression coil, its effect is to reduce single-phase-to-ground current, thereby impels ground arc from putting out, and continues development or burn lead to prevent fault.
When neutral point inserted arc suppression coil, the capacitance current component of ground connection can be by the compensation of the inductive current of arc suppression coil, and the electric current of ground arc reduces until putting out certainly like this.If select inductance (L) value of arc suppression coil to make that system can resonance occur when normally moving, cause new problem when its inductive current can the full remuneration earthing capacitance current.Therefore, generally make its L value resonance point that staggers.Two kinds of methods are arranged: 1, be to make the L value big, be undercompensation, this moment, inductive current was less than earthing capacitance current, if this moment, there was 1 line tripping in system, then system's direct-to-ground capacitance reduces, or when system's open-phase operation, then system's one phase or two-phase direct-to-ground capacitance also will reduce, or raise and make that arc suppression coil is saturated and when causing the L value to diminish, full remuneration then may occur when voltage is accidental, resonance appears.2, be that the L value is smaller, cry overcompensation, this moment, inductive current was greater than capacitance current.Therefore generally all adopt the operational mode of arc suppression coil overcompensation.
And at present a large amount of in the system what adopt is the arc suppression coil of turn-adjusting, and this is because turn-adjusting arc suppression coil with a long history, the manufacturing process maturation.The structure of turn-adjusting arc suppression coil as shown in Figure 1, this turn-adjusting arc suppression coil 1 is by ring structure iron core 2, is wound in the inductance coil 3 on the ring structure iron core 2 two magnetic legs and the shorting switch K of a plurality of regulating winding inductance values and forms.One of this arc suppression coil is terminated at the central point of three phase mains, other end ground connection.According to the electric power thus supplied of distrbution network, insert with the number of turn (inductance value) of K switch with required arc suppression coil.When in a single day single-phase earthing takes place in system, fault current can be limited in below the 3A, make touch voltage and step voltage all very low, electric arc burn is very slight, thereby avoids equipment, personal injury, but and system's charging operation 2 hours.The turn-adjusting arc suppression coil is by waiting spill current to adjust gear, promptly adjusting with K switch at present.Its gear is shelves surplus 10 generally, adopt the operational mode of overcompensation.Because stepping is regulated, it is thicker to certainly exist adjusting, and the gear of its selection very likely can be away from resonance point, causes the earth current after the compensation bigger, extinguishing arc automatically when breaking down, and new problem also may appear in the arc suppression coil of employing alternate manner; And what use in a large number in the system at present is the arc suppression coil of turn-adjusting, as adopting the replacing measure, must cause great waste.
Technical problem to be solved in the utility model is at the above-mentioned deficiency of prior art, and to provide a kind of turn-adjusting arc suppression coil with fine adjustment function.
Above-mentioned technical problem of the present utility model is realized by following technical scheme.
A kind of turn-adjusting arc suppression coil with fine adjustment function, comprise ring structure iron core, be wound in the inductance coil on the ring structure iron core two magnetic legs and the shorting switch K of regulating winding inductance value and form, it is characterized in that: the end serial connection one of above-mentioned inductance coil has the alihnment coil of a plurality of taps; One tapping switch, the one end is connected with the other end of alihnment coil, and the other end of tapping switch connects a plurality of taps of alihnment coil respectively; Be connected to K switch 3 at the two ends of alihnment coil, the control part of this K switch 3 connects tracer.
Advantage of the present utility model is:
Can realize the regulation stall of arc suppression coil 1%, the earth current when can realize the system failure this moment easily is limited within the scope that can put out certainly.
For structure of the present utility model, feature, function are had further understanding, enumerate specific embodiment now, and be described with reference to the accompanying drawings as follows:
Description of drawings
Fig. 1 is the arc suppression coil structural representation of prior art.
Fig. 2 is the turn-adjusting arc suppression coil structural representation with fine adjustment function of the present utility model.
Embodiment
As shown in Figure 2, a kind of turn-adjusting arc suppression coil provided by the utility model with fine adjustment function, comprise ring structure iron core 2, be wound in the inductance coil 3 on the ring structure iron core two magnetic legs and the shorting switch K of a plurality of regulating winding inductance values and form, it is characterized in that: the end serial connection one of above-mentioned inductance coil 3 has the alihnment coil 4 of a plurality of taps; One tapping switch K2, the one end is connected with the other end of alihnment coil, and the other end of tapping switch K2 connects a plurality of taps of alihnment coil 4 respectively, is connected to K switch 3 at the two ends of alihnment coil, and the control part of this K switch 3 connects tracer.
Turn-adjusting arc suppression coil with fine adjustment function of the present utility model its essence is that the ground connection side at existing arc suppression coil disconnects, the small coil of connecting between the ground connection side of existing arc suppression coil and ground is an alihnment coil 4, regulation stall surplus this alihnment coil 4 has 10, system is when normal operation, this direct short circuit in coil both sides promptly is equivalent to the operational mode of former arc suppression coil under system's normal operating conditions; If capacitive earth current has certain variation, after main coil (being former arc suppression coil) carries out corresponding adjusting, according to the main coil inductive current degree of compensation of system capacitive current is calculated, and the gear of ancillary coil is adjusted to than the position near full remuneration.When breaking down as system, then the switch of the direct short circuit in ancillary coil both sides disconnects, and ancillary coil puts into operation, and earth current is limited within the scope that can put out certainly.
That is, if between every grade of main coil be 10% span, and ancillary coil is when adopting 10 grades, can realize between shelves 1% adjusting span, that is to say that main coil is equivalent to coarse adjustment, and ancillary coil is equivalent to fine tuning.For example: main coil is L1,10 grades, ancillary coil is L2,10 grades, as main coil is only arranged, then its inductance gram is adjusted to 10%L1,20L1,30%L1,40%L1 respectively ... as seal in ancillary coil L2, when main coil during at the 3rd grade, be 30%L1, after then adding the regulation stall of ancillary coil, the regulation stall of its arc suppression coil is 30%L1+10%L2,30%L1+20%L2,30%L1+30%L2,30%L1+40%L2,30%L1+50%L2,30%L1+60%L2,30%L1+70%L2,30%L1+80%L2,30%L1+90%L2.If L2 elects 10%L1 as, then its adjustable range is 31%L1,32%L1,33%L1 ... the rest may be inferred adopts this device can realize the regulation stall of arc suppression coil 1%, and the earth current when can realize the system failure this moment easily is limited within the scope that can put out certainly.
Identical with former running status during normal the operation, ancillary coil just comes into operation during the system failure.
Claims (1)
1, a kind of turn-adjusting arc suppression coil with fine adjustment function, comprise ring structure iron core, be wound in the inductance coil on the ring structure iron core two magnetic legs and the shorting switch K of regulating winding inductance value and form, it is characterized in that: the end serial connection one of above-mentioned inductance coil has the alihnment coil of a plurality of taps; One tapping switch, the one end is connected with the other end of alihnment coil, and the other end of tapping switch connects a plurality of taps of alihnment coil respectively; Be connected to K switch 3 at the two ends of alihnment coil, the control part of this K switch 3 connects tracer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02237031 CN2545740Y (en) | 2002-06-05 | 2002-06-05 | Turn-adjusting arc-extinguishing winding with trimming function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02237031 CN2545740Y (en) | 2002-06-05 | 2002-06-05 | Turn-adjusting arc-extinguishing winding with trimming function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2545740Y true CN2545740Y (en) | 2003-04-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02237031 Expired - Fee Related CN2545740Y (en) | 2002-06-05 | 2002-06-05 | Turn-adjusting arc-extinguishing winding with trimming function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2545740Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109524953A (en) * | 2018-11-21 | 2019-03-26 | 许继变压器有限公司 | A kind of arc suppression coil |
-
2002
- 2002-06-05 CN CN 02237031 patent/CN2545740Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109524953A (en) * | 2018-11-21 | 2019-03-26 | 许继变压器有限公司 | A kind of arc suppression coil |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |