CN203826784U - Low-voltage power distribution device - Google Patents
Low-voltage power distribution device Download PDFInfo
- Publication number
- CN203826784U CN203826784U CN201420213568.7U CN201420213568U CN203826784U CN 203826784 U CN203826784 U CN 203826784U CN 201420213568 U CN201420213568 U CN 201420213568U CN 203826784 U CN203826784 U CN 203826784U
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- Prior art keywords
- low
- circuit breaker
- voltage distribution
- current transformer
- distribution equipment
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- 238000010168 coupling process Methods 0.000 claims abstract description 9
- 238000005859 coupling reaction Methods 0.000 claims abstract description 9
- 238000012795 verification Methods 0.000 claims description 14
- 230000007246 mechanism Effects 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 11
- 230000008859 change Effects 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 7
- 239000011810 insulating material Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 7
- 230000005611 electricity Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The utility model provides a low-voltage power distribution device, which is used for carrying out low-voltage power distribution. The low-voltage power distribution device comprises a first fuse, a current transformer for metering, an incoming line circuit breaker, a power saving module, a current transformer for measurement and an outgoing line circuit breaker which are sequentially connected, wherein the power saving module comprises a three-phase transformer and self-coupling coils arranged at the low-voltage side of each phase of the three-phase transformer; and each of the self-coupling coils is provided with a plurality of taps. The low-voltage power distribution device enables current of three phases A, B, C to be interacted with each other through additionally arranging the coils and generates mutually canceling zero-sequence magnetic potential, thereby further reducing zero-sequence current, suppressing the third harmonic, and realizing a purpose of power saving.
Description
Technical field
The utility model belongs to low-voltage distribution equipment technical field, relates in particular to a kind of electricity saving function low-voltage distribution equipment that has.
Background technology
There is the unbalanced situation of three-phase load as 400V low-voltage network in current low-voltage network, the zero-sequence current of its generation and triple-frequency harmonics, caused very large grid loss.
Summary of the invention
In view of this, the purpose of this utility model is to provide a kind of low-voltage distribution equipment, to reduce grid loss.
For achieving the above object, the utility model embodiment provides a kind of low-voltage distribution equipment, be used for carrying out low-voltage distribution, comprise the first fuse, current transformer for metering, lead-in circuit breaker, power-saving module, Verification of Measuring Current Transformer and the wire-outgoing breaker that connect successively; Described power-saving module comprises three-phase transformer and is arranged on the self coupling coil of the every phase low-pressure side of described three-phase transformer; Described in each, self coupling coil has a plurality of taps.
Preferably, described power-saving module also comprises the individually balanced coil being arranged between described three-phase transformer high-pressure side and low-pressure side, and described individually balanced coil is Δ type and connects.
Preferably, described lead-in circuit breaker comprises the first circuit breaker and the second circuit breaker being arranged in parallel, and between described the second circuit breaker and described Verification of Measuring Current Transformer, is in series with described power-saving module; Described wire-outgoing breaker comprises the 3rd circuit breaker, the 4th circuit breaker and the 5th circuit breaker being arranged in parallel.
Preferably, described lead-in circuit breaker comprises breaker body, motor-operating mechanism and controller, and described controller, for controlling opening a sluice gate and closing a floodgate of described breaker body by described motor-operating mechanism.
Preferably, described lead-in circuit breaker also comprises communication module, for receiving remote control command to send to controller, so that described controller is controlled opening a sluice gate and closing a floodgate of described breaker body by described motor-operating mechanism.
Preferably, on described casing, returning apparatus has change over switch, for switching between two kinds of patterns of lead-in circuit breaker controlling on the spot described in described lead-in circuit breaker and Long-distance Control.
Preferably, described current transformer for metering is threephase current transformer, and described Verification of Measuring Current Transformer comprises threephase current transformer and zero sequence current mutual inductor.
Preferably, returning apparatus has three-phase voltage meter and for the protection of the second fuse of described three-phase voltage meter, described three-phase voltage meter is used for measuring primary voltage in described casing.
Preferably, described low-voltage distribution equipment also comprises the three phase watt-hour meter being connected with described current transformer for metering, the three phase ammeter being connected with the threephase current transformer of described Verification of Measuring Current Transformer, the zero-sequence current table being connected with described zero sequence current mutual inductor and for the protection of the 3rd fuse of described three phase ammeter.
Preferably, the front end of described casing is provided with openable chamber door and isolating metal door; Wherein said isolating metal door makes and is located at the inner side of described chamber door with insulating material, described current transformer for metering and described Verification of Measuring Current Transformer are arranged on described isolating metal door.
The utility model embodiment, in three-phase low-voltage power distribution network low-pressure side, set up and be the self coupling coil that Δ type connects, by the interaction of A, B, C three-phase current, produced the zero sequence magnetic potential of cancelling out each other, and then reduced zero-sequence current and suppressed triple-frequency harmonics, thereby realized economize on electricity.
In addition, the utility model has also been used the lead-in circuit breaker of intelligent communication, and user need not open a sluice gate by manual operation, close a floodgate, and has simplified operation, has improved fail safe.
Meanwhile, the utility model has also been set up isolating metal door, has avoided operating personnel that the problem of flash burn occurs, and has improved fail safe.
Accompanying drawing explanation
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 embodiment more of the present utility model, for those of ordinary skills, 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 the major loop of the low-voltage distribution equipment that provides of the utility model;
Fig. 2 A is the power-saving module structure chart of the low-voltage distribution equipment that provides of the utility model;
Fig. 2 B is the individually balanced coil connection diagram of the low-voltage distribution equipment that provides of the utility model;
Fig. 3 A is the schematic diagram that comprises voltmeter secondary circuit of the low-voltage distribution equipment that provides of the utility model;
Fig. 3 B is the secondary circuit schematic diagram that comprises threephase current transformer of the low-voltage distribution equipment that provides of the utility model;
Fig. 3 C is the secondary circuit schematic diagram that comprises zero sequence phase current mutual inductor of the low-voltage distribution equipment that provides of the utility model;
Fig. 3 D is the secondary circuit schematic diagram that comprises lead-in circuit breaker of the low-voltage distribution equipment that provides of the utility model.
Embodiment
For making object, technical scheme and the advantage of the utility model embodiment clearer, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
Embodiment mono-
Fig. 1 shows the schematic diagram of an embodiment of the major loop of the low-voltage distribution equipment that the utility model provides, and the major loop of this low-voltage distribution equipment comprises the first fuse 1, current transformer for metering 2, lead-in circuit breaker, power-saving module 33, Verification of Measuring Current Transformer and the wire-outgoing breaker connecting successively.Wherein lead-in circuit breaker comprises between the first circuit breaker 31 of being arranged in parallel and the second circuit breaker 32, the second circuit breakers 32 and Verification of Measuring Current Transformer and is in series with electricity-saving appliance 33.Wire-outgoing breaker comprises the 3rd circuit breaker 51, the 4th circuit breaker 52 and the 5th circuit breaker 53 being arranged in parallel.
As shown in Figure 2 A, the power-saving module in the utility model 33 comprises three-phase transformer 311 and the self coupling coil 312 that is arranged on every phase 311 low-pressure sides of described three-phase transformer (a, b, c side in figure); Each self coupling coil has a plurality of taps (x1, x2, x3; Y1, y2, y3; Z1, z2, z3), there is the effect of pressure regulation, and reduced neutral line current, thereby reduced the electric energy loss of electrical network.
Power-saving module of the present utility model further also comprises individually balanced coil 313, is Δ type and connects (seeing Fig. 2 B).The low capacity balance coil that is its principle and high-power transformer setting is similar, for suppressing triple-frequency harmonics.
Lead-in circuit breaker in the utility model is intelligent communication breaker of plastic casing, except breaker body, also comprise controller and motor-operating mechanism, motor-operating mechanism is connected between controller and breaker body, and its middle controller is for controlling the combined floodgate of opening a sluice gate of breaker body by motor-operating mechanism.
Its middle controller can be arranged on the panel of low-voltage distribution equipment.
In the utility model preferred embodiment, lead-in circuit breaker also comprises communication module, for receiving remote control command to send to controller, so that described controller is controlled opening a sluice gate and closing a floodgate of described breaker body by described motor-operating mechanism.
Above-mentioned the first circuit breaker is back-up breaker, and the second circuit breaker is conventional circuit breaker.Both can not be simultaneously closed.Only, when the second circuit breaker or power-saving module fault, just use the first circuit breaker.
As shown in Figure 1, the utility model mesolow power distribution equipment is three-phase low-voltage power distribution equipment, for low-voltage distribution, as 400V voltage distribution.Wherein three-phase inlet wire is respectively L1, L2, L3.Wherein Verification of Measuring Current Transformer comprises threephase current transformer 41 and zero sequence current mutual inductor 42.In the utility model, current transformer for metering is threephase current transformer,
Fig. 3 A-3D has shown the secondary circuit figure of low-voltage distribution equipment.
The secondary circuit figure that wherein 3A is voltmeter.Three-phase inlet wire L1, L2, L3 are connected to voltmeter 7 by a fuse 61,62,63 respectively.As seen from the figure, returning apparatus has three-phase voltage meter and for the protection of the second fuse of described three-phase voltage meter, wherein three-phase voltage meter is used for measuring primary voltage in this casing.
Wherein Fig. 3 B be with inlet wire L1 on, measure the secondary circuit figure being connected with three phase ammeter 8 with threephase current transformer 91,92,93.Wherein Fig. 3 C is the secondary circuit figure that zero sequence current mutual inductor 11 is connected with zero-sequence current table 10.As seen from the figure, this low-voltage distribution equipment also comprises the three phase ammeter 8 being connected with threephase current transformer 91,92,93, the zero-sequence current table 10 being connected with zero sequence current mutual inductor 11 and for the protection of the 3rd fuse 94 of three phase ammeter.
In the utility model, low-voltage distribution equipment also comprises three phase watt-hour meter, is connected, for electric energy is measured with current transformer for metering.
Wherein Fig. 3 D is the secondary circuit figure of the first circuit breaker or the second circuit breaker.As seen from the figure, lead-in circuit breaker comprises motor-operating mechanism 21 and communication module 22.In this loop, also comprise a fuse 24 for the protection of circuit breaker.Wherein returning apparatus has change over switch 23 in casing, for switching controlling on the spot between two kinds of patterns of lead-in circuit breaker and Long-distance Control lead-in circuit breaker.
When change over switch 23 is switched to " on the spot " shelves, node
with
be communicated with node
with
be communicated with, enter thus the pattern of controlling on the spot lead-in circuit breaker.When change over switch 23 is switched to " distant place " shelves, node
with
disconnect node
with
disconnect the pattern that enters thus Long-distance Control lead-in circuit breaker.
On the spot in control model, when operating personnel operate controller, can operate accordingly by driving electric operating mechanism, thus control breaker body open or and.
In distance control mode, operating personnel's remote operation order meeting is sent to controller by communication module, thus controller driving electric operating mechanism control opening of breaker body or and.
In the utility model, node module is also provided with indicator light 1HR and 1HG.By controlling the folding of auxiliary contact 01,02, control indicator light, to indicate respectively the current folding condition of circuit breaker.
When the low-voltage distribution equipment in the utility model operates, first the change over switch on panel 23 is forwarded to " on the spot " shelves, then normally use local operation, when measuring instrument shows that primary voltage is normal, can pass through the body of the controller combined floodgate lead-in circuit breaker of lead-in circuit breaker, the body of the wire-outgoing breaker that closes a floodgate as required after a while.
When the conditions being possessed of a distant place, the change over switch 23 on panel is switched to " distant place " shelves, can realize the functions such as long-range and divide-shut brake, measurement and automatic data logging control.
The utility model embodiment also relates to the setting of each element in low-voltage distribution equipment and low-voltage distribution equipment.The front end of the casing of concrete low-voltage distribution equipment is provided with openable chamber door and isolating metal door; Wherein isolating metal door makes and is located at the inner side of chamber door with insulating material, and current transformer for metering and Verification of Measuring Current Transformer are arranged on isolating metal door.When operating personnel operate, isolating metal door can be avoided the generation of arc loss like this.
By low-voltage distribution equipment of the present utility model, can not be used in closing by hand, and realize remote switching, measure, check meter etc.And the utility model is by electricity-saving appliance, has reduced the loss of energy.
In addition, the utility model has also been realized measurement, metering and safeguard function simultaneously.
The above is only preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (10)
1. a low-voltage distribution equipment, for carrying out low-voltage distribution, is characterized in that, described low-voltage distribution equipment comprises the first fuse, current transformer for metering, lead-in circuit breaker, power-saving module, Verification of Measuring Current Transformer and the wire-outgoing breaker connecting successively; Described power-saving module comprises three-phase transformer and is arranged on the self coupling coil of the every phase low-pressure side of described three-phase transformer; Described in each, self coupling coil has a plurality of taps.
2. low-voltage distribution equipment as claimed in claim 1, is characterized in that, described power-saving module also comprises the individually balanced coil being arranged between described three-phase transformer high-pressure side and low-pressure side, and described individually balanced coil is Δ type and connects.
3. low-voltage distribution equipment as claimed in claim 2, is characterized in that, described lead-in circuit breaker comprises the first circuit breaker and the second circuit breaker being arranged in parallel, and between described the second circuit breaker and described Verification of Measuring Current Transformer, is in series with described power-saving module; Described wire-outgoing breaker comprises the 3rd circuit breaker, the 4th circuit breaker and the 5th circuit breaker being arranged in parallel.
4. the low-voltage distribution equipment as described in claim 1 or 2 or 3, it is characterized in that, described lead-in circuit breaker comprises breaker body, motor-operating mechanism and controller, and described controller, for controlling opening a sluice gate and closing a floodgate of described breaker body by described motor-operating mechanism.
5. low-voltage distribution equipment as claimed in claim 4, it is characterized in that, described lead-in circuit breaker also comprises communication module, for receiving remote control command to send to controller, so that described controller is controlled opening a sluice gate and closing a floodgate of described breaker body by described motor-operating mechanism.
6. low-voltage distribution equipment as claimed in claim 5, is characterized in that, on described casing, returning apparatus has change over switch, for switching between two kinds of patterns of lead-in circuit breaker controlling on the spot described in described lead-in circuit breaker and Long-distance Control.
7. the low-voltage distribution equipment as described in claim 1 or 2 or 3, is characterized in that, described current transformer for metering is threephase current transformer, and described Verification of Measuring Current Transformer comprises threephase current transformer and zero sequence current mutual inductor.
8. low-voltage distribution equipment as claimed in claim 7, is characterized in that, returning apparatus has three-phase voltage meter and for the protection of the second fuse of described three-phase voltage meter, described three-phase voltage meter is used for measuring primary voltage in described casing.
9. low-voltage distribution equipment as claimed in claim 8; it is characterized in that, described low-voltage distribution equipment also comprises the three phase watt-hour meter being connected with described current transformer for metering, the three phase ammeter being connected with the threephase current transformer of described Verification of Measuring Current Transformer, the zero-sequence current table being connected with described zero sequence current mutual inductor and for the protection of the 3rd fuse of described three phase ammeter.
10. the low-voltage distribution equipment as described in claim 1 or 2 or 3, is characterized in that,, the front end of described casing is provided with openable chamber door and isolating metal door; Wherein said isolating metal door makes and is located at the inner side of described chamber door with insulating material, described current transformer for metering and described Verification of Measuring Current Transformer are arranged on described isolating metal door.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420213568.7U CN203826784U (en) | 2014-04-29 | 2014-04-29 | Low-voltage power distribution device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420213568.7U CN203826784U (en) | 2014-04-29 | 2014-04-29 | Low-voltage power distribution device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203826784U true CN203826784U (en) | 2014-09-10 |
Family
ID=51482249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420213568.7U Expired - Lifetime CN203826784U (en) | 2014-04-29 | 2014-04-29 | Low-voltage power distribution device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203826784U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103944083A (en) * | 2014-04-29 | 2014-07-23 | 国家电网公司 | Multifunctional power distribution control box |
| CN104953604A (en) * | 2015-06-30 | 2015-09-30 | 海鸿电气有限公司 | Intelligent high-voltage energy-saving cabinet |
-
2014
- 2014-04-29 CN CN201420213568.7U patent/CN203826784U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103944083A (en) * | 2014-04-29 | 2014-07-23 | 国家电网公司 | Multifunctional power distribution control box |
| CN103944083B (en) * | 2014-04-29 | 2017-06-06 | 国家电网公司 | A kind of multifunctional ligand electric control box |
| CN104953604A (en) * | 2015-06-30 | 2015-09-30 | 海鸿电气有限公司 | Intelligent high-voltage energy-saving cabinet |
| CN104953604B (en) * | 2015-06-30 | 2018-04-06 | 海鸿电气有限公司 | A kind of Intelligent high-pressure electricity-saving cabinet |
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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 |
Granted publication date: 20140910 |
|
| CX01 | Expiry of patent term |