CN203707774U - Power distribution system with two incoming line switches and one interconnection switch - Google Patents
Power distribution system with two incoming line switches and one interconnection switch Download PDFInfo
- Publication number
- CN203707774U CN203707774U CN201420042077.0U CN201420042077U CN203707774U CN 203707774 U CN203707774 U CN 203707774U CN 201420042077 U CN201420042077 U CN 201420042077U CN 203707774 U CN203707774 U CN 203707774U
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- switch
- service entrance
- entrance switch
- transformer
- circuit
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Abstract
The utility model discloses a power distribution system with two incoming line switches and one interconnection switch, which comprises a first transformer, a second transformer, a first busbar and a second busbar, and is characterized in that a first incoming line switch is connected between the first transformer and the first busbar, and a second incoming line switch is connected between the second transformer and the second busbar; and a first interconnection switch is connected between the first busbar and the second busbar, and the first incoming line switch, the second incoming line switch and the first interconnection switch are electrically interlocked with each other, thereby enabling the two transformers not to provide power for the same busbar at the same time, ensuring the two transformers not to parallelly operate under three operating modes which are possibly used in practice, and effectively ensuring safe operation of equipment.
Description
Technical field
The utility model relates to low-voltage distribution field, and especially a kind of two inlet wires one are got in touch with distribution system.
Background technology
Under existing market, in important low-voltage power supply system, the system of two transformer inlet wires to two sections of bussed supplies can be set, two inlet wires one are got in touch with distribution system.When two transformer baies do not meet paired running condition and while there is paired running, when two transformers are same section of bussed supply, there will be Circuit Fault on Secondary Transformer to produce circulation simultaneously, increase transformer loss, even there will be short circuit accident, equipment is impacted, bring economic loss.
Utility model content
For solving the problems of the technologies described above, the purpose of this utility model is to provide a kind of two inlet wires one of avoiding two parallel operation of transformers and gets in touch with distribution system.
The technical solution adopted in the utility model is:
A kind of two inlet wires one are got in touch with distribution system, comprise the first transformer, the second transformer, and first paragraph bus, second segment bus, it is characterized in that: between described the first transformer and first paragraph bus, be connected with the first service entrance switch, between described the second transformer and second segment bus, be connected with the second service entrance switch; Between described first paragraph bus and second segment bus, be connected with the first interconnection switch, between described the first service entrance switch, the second service entrance switch, the first interconnection switch electrical interlock when making two transformers different as same bussed supply.
Described the first service entrance switch has an electric closing circuit, and this electric closing circuit is made up of the first interlock circuit connecting successively from AC220V live wire end to zero line side, the first electric closing circuit button, the first closing coil; Described the first interlock circuit comprises in parallel the normally-closed contact of the second service entrance switch and the normally-closed contact of the first interconnection switch;
Described the second service entrance switch has an electric closing circuit, and this electric closing circuit is made up of the second interlock circuit connecting successively from AC220V live wire end to zero line side, the second electric closing circuit button, the second closing coil; Described the second interlock circuit comprises in parallel the normally-closed contact of the first service entrance switch and the normally-closed contact of the first interconnection switch;
Described the first interconnection switch has an electric closing circuit, and this electric closing circuit is made up of the 3rd interlock circuit connecting successively from AC220V live wire end to zero line side, the 3rd electric closing circuit button, the 3rd closing coil; Described the 3rd interlock circuit comprises in parallel the normally-closed contact of the first service entrance switch and the normally-closed contact of the second service entrance switch.
Further, the electric closing circuit live wire end of described the first service entrance switch, the second service entrance switch, the second interconnection switch is all in series with fuse.
The beneficial effects of the utility model:
The utility model two inlet wires one are got in touch with distribution system and are designed respectively electrical interlock scheme by the electric closing circuit of the interconnection switch at two transformer service entrance switchs and two sections of buses of connection, can ensure under three kinds of mode of operations that use in actual capabilities at two transformers, all there will not be the situation of paired running, effective guarantee equipment safety operation.
Brief description of the drawings
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further.
Fig. 1 is the theory diagram that the utility model two inlet wires one are got in touch with distribution system;
Fig. 2 is the electric closing circuit figure of the first service entrance switch;
Fig. 3 is the electric closing circuit figure of the second service entrance switch;
Fig. 4 is the electric closing circuit figure of the first interconnection switch.
In figure, be denoted as:
The first transformer: No. 1 transformer
The second transformer: No. 2 transformers
First paragraph bus: I section bus
Second segment bus: II section bus
The first service entrance switch: 1QF; The second service entrance switch: 2QF; The first interconnection switch: QF12;
The first interlock circuit: 100; The second interlock circuit 200; The 3rd interlock circuit 300;
The first electric closing circuit button: HA1; The second electric closing circuit button: HA2; The 3rd electric closing circuit button HA3;
The first closing coil, the second closing coil, the 3rd closing coil: XF;
Fuse: 1FU, 2FU, 3FU.
Embodiment
Shown in figure 1; for a kind of two inlet wires one of the present utility model are got in touch with distribution system; comprise the first transformer, the second transformer; and first paragraph bus, second segment bus; between described the first transformer and first paragraph bus, being connected with the first service entrance switch 1QF(often opens), between described the second transformer and second segment bus, be connected with the second service entrance switch 2QF(and often open) be connected with the first interconnection switch QF12(between described first paragraph bus and second segment bus and often open);
There is not the situation of paired running for realizing two transformers, must often open the first service entrance switch 1QF(), the second service entrance switch 2QF(often opens), the first interconnection switch QF12(often opens) between carry out electrical interlock, the following three kinds of mode of operations that ensure two transformers limit, that is:
One: No. 1 transformer of mode of operation powers to two sections of buses simultaneously, and after electrical interlock design ensures that 1QF and QF12 close a floodgate, 2QF switch can not close a floodgate, and guarantees that 1, No. 2 transformer bay there will not be the situation of paired running;
Two: No. 2 transformers of mode of operation power to two sections of buses simultaneously, and after electrical interlock design ensures that 2QF and QF12 close a floodgate, 1QF switch can not close a floodgate, and guarantee that 1, No. 2 transformer bay there will not be the situation of paired running;
Mode of operation three: 1, No. 2 transformers power to two sections of buses simultaneously simultaneously, and electrical interlock design ensures 1QF, and after 2QF closes a floodgate, QF12 switch can not close a floodgate, and guarantees that 1, No. 2 transformer bay there will not be the situation of paired running;
In the time of design electrical interlock scheme, make full use of the combined floodgate principle of frame switch, as long as access the auxiliary contact (normally closed contact) of other switches at its electric closing circuit serial or parallel connection, the break-make of the auxiliary contact by other switches is set logic and controls the combined floodgate of this switch, to realize interlock.
Concrete, the electric closing circuit configuring by it between described the first service entrance switch 1QF, the second service entrance switch 2QF, the first interconnection switch QF12 restricts mutually, realizes interlocking;
As shown in Figure 2, the electric closing circuit of the first service entrance switch 1QF is by the first interlock circuit 100, the first electric closing circuit button HA1, the first closing coil XF(1QF that connect successively from AC220V live wire end L to zero line side N) form; Described the first interlock circuit 100 comprises in parallel the normally-closed contact of the second service entrance switch 2QF and the normally-closed contact of the first interconnection switch QF12;
Its operation principle is: in the time of one of satisfied No. 2 transformer service entrance switch 2QF separating brakes or interconnection switch QF12 separating brake condition, the auxiliary contact (2QF or QF12) of respective switch is normally closed, while pressing the electric closing circuit button of 1QF HA1, connect 1QF closing coil XF, realize the electric combined floodgate of 1QF; Being discontented with 1QF while being enough to condition cannot close a floodgate;
As shown in Figure 3, the electric closing circuit of described the second service entrance switch 2QF is by the second interlock circuit 200, the second electric closing circuit button HA2, the second closing coil XF(2QF that connect successively from AC220V live wire end L to zero line side N) form; Described the second interlock circuit 200 comprises in parallel the normally-closed contact of the first service entrance switch 1QF and the normally-closed contact of the first interconnection switch QF12;
Its operation principle is: in the time of one of satisfied No. 1 transformer service entrance switch 1QF separating brake or interconnection switch QF12 separating brake condition, the auxiliary contact (1QF or QF12) of respective switch is normally closed, while pressing the electric closing circuit button of 2QF HA2, connect 2QF closing coil XF, realize the electric combined floodgate of 2QF; Being discontented with 2QF while being enough to condition cannot close a floodgate;
As shown in Figure 4, the electric closing circuit of described the first interconnection switch QF12 is by the 3rd interlock circuit 300, the 3rd electric closing circuit button HA3, the 3rd closing coil XF(QF12 that connect successively from AC220V live wire end L to zero line side N) form; Described the 3rd interlock circuit 300 comprises in parallel the normally-closed contact of the first service entrance switch 1QF and the normally-closed contact of the second service entrance switch 2QF.
Its operation principle is: in the time of one of satisfied No. 1 transformer service entrance switch 1QF separating brake or No. 2 transformer service entrance switch 2QF separating brake conditions, the auxiliary contact (1QF or 2QF) of respective switch is normally closed, while pressing the electric closing circuit button of QF12, connect QF12 closing coil XF, realize the electric combined floodgate of QF12; Being discontented with QF12 while being enough to condition cannot close a floodgate;
In sum, by the first service entrance switch 1QF, the second service entrance switch 2QF, the electric closing circuit reciprocal interlocking design of the first interconnection switch QF12, press HA1, HA2, any two buttons of HA3, in other loop, corresponding normally-closed contact all can disconnect, in a switch that causes being left, electric closing circuit is opened a sluice gate, its switch knob also can not work, and reaches interlocking object.
As the further improvement of the technical program; the electric closing circuit live wire end L of described the first service entrance switch 1QF, the second service entrance switch 2QF, the first interconnection switch QF12 is in series with fuse; current anomaly be elevated to certain height and certain in; self fuse and cut off electric current, thereby play the effect of protective circuit safe operation.
The utility model two inlet wires one are got in touch with distribution system and are designed respectively electrical interlock scheme by the electric closing circuit of the interconnection switch at two transformer service entrance switchs and two sections of buses of connection, can ensure under three kinds of mode of operations that use in actual capabilities at two transformers, all there will not be the situation of paired running, effective guarantee equipment safety operation.
The foregoing is only preferential execution mode of the present utility model, the utility model is not limited to above-mentioned execution mode, as long as within the technical scheme that realizes the utility model object with basic identical means all belongs to protection range of the present utility model.
Claims (3)
1. an inlet wire one is got in touch with distribution system, comprise the first transformer, the second transformer, and first paragraph bus, second segment bus, it is characterized in that: between described the first transformer and first paragraph bus, be connected with the first service entrance switch, between described the second transformer and second segment bus, be connected with the second service entrance switch; Between described first paragraph bus and second segment bus, be connected with the first interconnection switch, between described the first service entrance switch, the second service entrance switch, the first interconnection switch electrical interlock when making two transformers different as same bussed supply.
2. a kind of two inlet wires one according to claim 1 are got in touch with distribution system, it is characterized in that:
Described the first service entrance switch has an electric closing circuit, and this electric closing circuit is made up of the first interlock circuit connecting successively from AC220V live wire end to zero line side, the first electric closing circuit button, the first closing coil; Described the first interlock circuit comprises in parallel the normally-closed contact of the second service entrance switch and the normally-closed contact of the first interconnection switch;
Described the second service entrance switch has an electric closing circuit, and this electric closing circuit is made up of the second interlock circuit connecting successively from AC220V live wire end to zero line side, the second electric closing circuit button, the second closing coil; Described the second interlock circuit comprises in parallel the normally-closed contact of the first service entrance switch and the normally-closed contact of the first interconnection switch;
Described the first interconnection switch has an electric closing circuit, and this electric closing circuit is made up of the 3rd interlock circuit connecting successively from AC220V live wire end to zero line side, the 3rd electric closing circuit button, the 3rd closing coil; Described the 3rd interlock circuit comprises in parallel the normally-closed contact of the first service entrance switch and the normally-closed contact of the second service entrance switch.
3. a kind of two inlet wires one according to claim 2 are got in touch with distribution system, it is characterized in that: the electric closing circuit live wire end of described the first service entrance switch, the second service entrance switch, the second interconnection switch is all in series with fuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420042077.0U CN203707774U (en) | 2014-01-22 | 2014-01-22 | Power distribution system with two incoming line switches and one interconnection switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420042077.0U CN203707774U (en) | 2014-01-22 | 2014-01-22 | Power distribution system with two incoming line switches and one interconnection switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203707774U true CN203707774U (en) | 2014-07-09 |
Family
ID=51058156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420042077.0U Expired - Fee Related CN203707774U (en) | 2014-01-22 | 2014-01-22 | Power distribution system with two incoming line switches and one interconnection switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203707774U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319764A (en) * | 2014-10-29 | 2015-01-28 | 国家电网公司 | Residential district distribution transformer load rate control system |
| CN106026348A (en) * | 2016-07-21 | 2016-10-12 | 安徽海螺建材设计研究院 | Low-voltage interconnection loop system and operating method thereof |
| CN108447713B (en) * | 2018-05-18 | 2023-09-29 | 浙江临高电气实业有限公司 | Lock of mechanical interlocking device, mechanical interlocking device and power supply system |
-
2014
- 2014-01-22 CN CN201420042077.0U patent/CN203707774U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319764A (en) * | 2014-10-29 | 2015-01-28 | 国家电网公司 | Residential district distribution transformer load rate control system |
| CN106026348A (en) * | 2016-07-21 | 2016-10-12 | 安徽海螺建材设计研究院 | Low-voltage interconnection loop system and operating method thereof |
| CN108447713B (en) * | 2018-05-18 | 2023-09-29 | 浙江临高电气实业有限公司 | Lock of mechanical interlocking device, mechanical interlocking device and power supply system |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140709 Termination date: 20180122 |