CN204205595U - A kind of low-voltage load transfer system - Google Patents
A kind of low-voltage load transfer system Download PDFInfo
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- CN204205595U CN204205595U CN201420745327.7U CN201420745327U CN204205595U CN 204205595 U CN204205595 U CN 204205595U CN 201420745327 U CN201420745327 U CN 201420745327U CN 204205595 U CN204205595 U CN 204205595U
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Abstract
The utility model discloses a kind of low-voltage load transfer system in power transmission and distribution field, comprise a box low-voltage load transfer device be suspended in the middle part of electric pole, and from two groups of three phase isolated wires of electrical network, box low-voltage load transfer device comprises casing, box house is provided with three-phase parallel-moving type load plug-in strip, grid-type fuse is provided with in three-phase parallel-moving type load plug-in strip, casing top is provided with six lead-in wire pile crowns, six lead-in wire pile crowns are equally divided into two groups, often organize three lead-in wire pile crowns, one group of lead-in wire pile crown is connected with the upper end of three-phase parallel-moving type load plug-in strip, other one group of lead-in wire pile crown is connected with the bottom of three-phase parallel-moving type load plug-in strip, three-phase parallel-moving type load plug-in strip is positioned at a horizontally disposed guide rail, and can carry out slippage along guide rail, and guide rail and three-phase parallel-moving type load plug-in strip are fixed in casing by a plug-in strip positioning supporting frame, two groups of three phase isolated wires are introduced in the casing of box low-voltage load transfer device respectively, and correspondingly with the two ends of described three-phase parallel-moving type load plug-in strip connect, the neutral line in two groups of three phase isolated wires and casing ground connection simultaneously.
Description
Technical field
The utility model relates to a kind of low-voltage load transfer system in power transmission and distribution field.
Background technology
Along with the quick growth of domestic economy and the raising day by day of living standards of the people, society is also more and more higher to the requirement of power supply reliability.Low voltage electric network is as the end of power supply, and its power supply reliability has power consumer the most directly to be affected.Carry out the power supply reliability that low-voltage load transfer can improve low voltage electric network timely and effectively, effectively reduce frequency of power cut and the interruption duration of enterprise and resident.Mainly carry out low voltage electric network load transfer plan by traditional low pressure jumper device at present.
Current low-voltage load transfer system, mainly realizes by a low pressure jumper device.In use there is following problem, the first, low pressure jumper device is chronically exposed to outer operation, and the increase along with number of operations exists that contact point is easily singed, the insulating barrier easily defect such as aging, and failure rate is higher.The second, the fuse of pressure jumper device is easily pulled off under wind-force effect, and the 3rd low pressure jumper device is positioned at the top of electric pole, is suspended on high-altitude, makes an inspection tour and safeguards inconvenience.Current low-voltage load transfer system in operation, also there is following problem: first, because the existing exposed position of low pressure jumper device is large, during operation, big current easily produces electric spark, the live line working personnel on bar that not only easily cause touch by mistake, live line working personal security is threatened, also easily causes low pressure jumper device impaired because of misoperation.The second, because existing low pressure jumper device needs when carrying out load transfer plan single-phasely to operate one by one, carry out a load transfer plan and merge the work action required time of electrical network generally more than 15 minutes, working strength is larger.3rd, when carrying out load transfer plan operation to jumper, live line working personnel need outwards to bend, and operating procedure is many, easily has an accident, and processing safety is poor.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, and provide a kind of low-voltage load transfer system, its contact point is not easily singed, insulating barrier is not easily aging, and can operate by three-phase when carrying out load transfer plan operation, reduce the time of operation, be convenient to make an inspection tour and safeguard. simultaneously
A kind of technical scheme realizing above-mentioned purpose is: a kind of low-voltage load transfer system, comprise a box low-voltage load transfer device be suspended in the middle part of electric pole, and from two groups of three phase isolated wires of electrical network, described box low-voltage load transfer device comprises casing, described box house is provided with three-phase parallel-moving type load plug-in strip, grid-type fuse is provided with in described three-phase parallel-moving type load plug-in strip, described casing top is provided with six lead-in wire pile crowns, six described lead-in wire pile crowns are equally divided into two groups, often organize three lead-in wire pile crowns, one group of lead-in wire pile crown is connected with the upper end of described three-phase parallel-moving type load plug-in strip, other one group of lead-in wire pile crown is connected with the bottom of described three-phase parallel-moving type load plug-in strip, described three-phase parallel-moving type load plug-in strip is positioned at a horizontally disposed guide rail, and can carry out slippage along described guide rail, and described guide rail and described three-phase parallel-moving type load plug-in strip are fixed in described casing by a plug-in strip positioning supporting frame, two groups of described three phase isolated wires are introduced in the casing of described box low-voltage load transfer device respectively, and correspondingly with the two ends of described three-phase parallel-moving type load plug-in strip connect, the neutral line in three phase isolated wire described in two groups and described casing ground connection simultaneously.
Further, in described box low-voltage load transfer device, go between described in two groups pile crown, corresponding to upper copper bar and lower copper bar, is connected with the two ends up and down of described three-phase parallel-moving type load plug-in strip.
Further, described upper copper bar and described lower copper bar outside are all enclosed with pyrocondensation insulating barrier.
Further, three-phase parallel-moving type load plug-in strip in described box low-voltage load transfer device can be positioned at guide rail one end near described plug-in strip positioning supporting frame, described guide rail one end away from described plug-in strip positioning supporting frame can be positioned at, also can be positioned on the mid point of described guide rail.
Further, in described box low-voltage load transfer device, described three-phase parallel-moving type load plug-in strip connects a handle be positioned at outside described casing, and by the slippage of this handle realization on described guide rail.
Have employed the technical scheme of a kind of low-voltage load transfer system of the present utility model, namely a box low-voltage load transfer device be suspended in the middle part of electric pole is comprised, and from two groups of three phase isolated wires of electrical network, described box low-voltage load transfer device comprises casing, described box house is provided with three-phase parallel-moving type load plug-in strip, grid-type fuse is provided with in described three-phase parallel-moving type load plug-in strip, described casing top is provided with six lead-in wire pile crowns, six described lead-in wire pile crowns are equally divided into two groups, often organize three lead-in wire pile crowns, one group of lead-in wire pile crown is connected with the upper end of described three-phase parallel-moving type load plug-in strip, other one group of lead-in wire pile crown is connected with the bottom of described three-phase parallel-moving type load plug-in strip, described three-phase parallel-moving type load plug-in strip is positioned at a horizontally disposed guide rail, and can carry out slippage along described guide rail, and described guide rail and described three-phase parallel-moving type load plug-in strip are fixed in described casing by a plug-in strip positioning supporting frame, two groups of described three phase isolated wires are introduced in the casing of described box low-voltage load transfer device respectively, and correspondingly with the two ends of described three-phase parallel-moving type load plug-in strip connect, the neutral line in three phase isolated wire described in two groups and described casing ground connection simultaneously.Its technique effect is: the contact point of low-voltage load transfer system is not easily singed, and insulating barrier is not easily aging, and can operate by three-phase when carrying out load transfer plan operation simultaneously, reduces the time of operation, is convenient to the maintenance of low-voltage load transfer system simultaneously.
Accompanying drawing explanation
Fig. 1 is the structure chart of a kind of low-voltage load transfer system of the present utility model
Fig. 2 is the outside drawing of the box low-voltage load transfer device in a kind of low-voltage load transfer system of the present utility model.
Fig. 3 is the cut-away view of the box low-voltage load transfer device in a kind of low-voltage load transfer system of the present utility model.
Embodiment
Refer to Fig. 1, inventor of the present utility model, in order to understand the technical solution of the utility model better, below by embodiment particularly, and is described in detail by reference to the accompanying drawings:
A kind of low-voltage load transfer system of the present utility model comprises a box low-voltage load transfer device 10, box low-voltage load transfer device 10 comprises casing 1, casing 1 top is provided with six lead-in wire pile crowns 2, casing 1 inside is provided with three-phase parallel-moving type load plug-in strip 3, six lead-in wire pile crowns 2 are divided into two groups, often organize three, one group connects the upper end of three-phase parallel-moving type load plug-in strip 3 by upper copper bar 5, other one group of bottom being connected three-phase parallel-moving type load plug-in strip 3 by lower copper bar 6; Three-phase parallel-moving type load plug-in strip 3 connects the handle 9 that controls its switch, it is outside that this handle 9 is located at casing 1.Three-phase parallel-moving type load plug-in strip 3 is positioned at the guide rail 8 of a level, and the two ends up and down of three-phase parallel-moving type load plug-in strip 3 embed in guide rail 8 respectively.Under the drive of handle 9, the slippage on guide rail 8 of three-phase parallel-moving type load plug-in strip 3, realizes three-phase parallel-moving type load plug-in strip 3 and disconnects and close a floodgate.Three-phase parallel-moving type load plug-in strip 3 and guide rail 8 are fixed in casing 1 by plug-in strip positioning supporting frame 4.Be provided with grid-type fuse 7 in three-phase parallel-moving type load plug-in strip 3, when being operated by handle 9 pairs of three-phase parallel-moving type load plug-in strips 3, the grid-type fuse 7 in three-phase parallel-moving type load plug-in strip 3 is not easily broken.Upper copper bar 5 and lower copper bar 6 outer wrap have pyrocondensation insulating barrier, and pyrocondensation insulating barrier is not easily aging, can be used to strengthen the insulation property of upper copper bar 5 in casing 1 and lower copper bar 6.Have in upper copper bar 5 and lower copper bar 6 simultaneously big current by time, effectively can prevent the contact point between copper bar 5 and three-phase parallel-moving type load plug-in strip 3, the contact point between lower copper bar 6 and three-phase parallel-moving type load plug-in strip 3 is singed.
Box low-voltage load transfer device 10 is fixed on the middle part of electric pole 20, liftoff about 6m place.Two groups of three phase isolated wires from electrical network cause for 30 times in casing 1, correspondence is connected with the two ends of three-phase parallel-moving type load plug-in strip 3, can operate electrical network to make three-phase parallel-moving type load plug-in strip 3, the neutral line in three phase isolated wire 30 is connected with casing 1, and the common earth electrode 21 connected on electric pole 20, thus ground connection.The object of such design is: owing to reducing the height of three-phase parallel-moving type load plug-in strip 3, be more beneficial to tour.
Simultaneously on box low-voltage load transfer device 10, the position of three-phase parallel-moving type load plug-in strip 3 on guide rail 8, except being originally positioned at the open position of guide rail 8 near plug-in strip positioning supporting frame 4 one end, being positioned at except the closing position of guide rail 8 away from plug-in strip positioning supporting frame 4 one end, three-phase parallel-moving type load plug-in strip 3 has also newly been established to be positioned at interim position on guide rail 8 mid point.The amendment to low voltage electric network figure that interim position object can avoid annual four times is set, and realize seasonality and be incorporated into the power networks mode namely in low power consumption season, for reducing line loss, underload rate bar is become to the electrical network two one implemented, a bar of stopping using becomes, and is become the seasonal operational mode of power supply by another bar.Seasonality be incorporated into the power networks mode must specify one be main for electric pole become (pole transformer), other one for seasonality stop labour bar change.Like this in electricity consumption dull season, electrical network arranged side by side, stops labour part bar and becomes in the hope of reducing line loss.In the electricity consumption busy season, untie electrical network arranged side by side, to ensure that power grid security is powered.When part inspection and maintenance being carried out to equipment for power transmission and distribution simultaneously, also by operation and adjustment electrical network, improve power supply reliability when remaining on continual power supply, effectively avoid electrical network, because of jumper fault, major power outage accident occurs.Meanwhile, electrical network when not having a power failure, can carry out the work such as the light maintenance of bar change and auxiliary device, overhaul, maintenance and creating condition, indirectly improve power supply reliability, and creates condition for the economical operation realizing N-1 low voltage electric network.Meanwhile, be also conducive to becoming low load factor bar take seasonally to merge electrical network, seasonality stops labour, provide conveniently with the enforcement reducing the measures such as line loss.
Compared to traditional low-voltage load transfer system, a kind of low-voltage load transfer system casing 1 of the present utility model protects the actuating part being positioned at casing 1, has eradicated the easy problem of aging of insulating barrier that original low-voltage load transfer system of being everlasting occurs completely.After operating thousands of times to the three-phase parallel-moving type load plug-in strip 3 in a kind of low-voltage load transfer system of the present utility model, there is not ageing of insulation sign in upper copper bar 5 and the lower copper bar 6 of this low-voltage load transfer system inside.
Because six lead-in wire pile crowns 2 and the connection at three-phase parallel-moving type load plug-in strip about 3 two ends all have employed the larger copper bar of ampacity, when making a kind of low-voltage load transfer system of the present utility model can sustain load transfer plan, the heavy current impact produced because carrying out breaking-closing operating to three-phase parallel-moving type load plug-in strip 3.Between three-phase parallel-moving type load plug-in strip 3 and copper bar, contact area increases, decrease the phenomenon of copper bar heating, copper bar and six lead-in wire pile crowns 2 are effectively stopped, and the contact point between copper bar and three-phase parallel-moving type load plug-in strip 3 is singed or burnout phenomenon, ensure that the equipment perfectness of low-voltage load transfer system.
A kind of low-voltage load transfer system of the present utility model utilizes three-phase parallel-moving type load plug-in strip 3 that the three-phase of original low-voltage load transfer system is improved to present three-phase ganged operation by phase mode of operation, and this operation only needs operate the handle 9 be positioned at outside casing 1, therefore, easy to operate, quick, safety, and substantially reduce operating time and labour intensity, improve operating efficiency, solving original low-voltage load transfer system needs live line working personnel needs to bend outwards to operate, operating procedure is many, the problem of poor stability.
After casing 1 introduced by three-phase parallel-moving type load plug-in strip 3, be that three-phase ganged operate by three-phase by phase operations improvement load transfer plan mode, solve the contact resistance increase that original low-voltage load transfer system single phase operation electric current is excessive, contact point is singed causes, the problem of generating heat, the situation preventing the aging of copper bar insulating barrier He burn out.Substantially reduce operating time and the labour intensity of live line working personnel, improve operating efficiency and processing safety.
Those of ordinary skill in the art will be appreciated that, above embodiment is only used to the utility model is described, and be not used as restriction of the present utility model, as long as in spirit of the present utility model, all will drop in Claims scope of the present utility model the change of the above embodiment, modification.
Claims (5)
1. a low-voltage load transfer system, it is characterized in that: comprise a box low-voltage load transfer device be suspended in the middle part of electric pole, and from two groups of three phase isolated wires of electrical network, described box low-voltage load transfer device comprises casing, described box house is provided with three-phase parallel-moving type load plug-in strip, grid-type fuse is provided with in described three-phase parallel-moving type load plug-in strip, described casing top is provided with six lead-in wire pile crowns, six described lead-in wire pile crowns are equally divided into two groups, often organize three lead-in wire pile crowns, one group of lead-in wire pile crown is connected with the upper end of described three-phase parallel-moving type load plug-in strip, other one group of lead-in wire pile crown is connected with the bottom of described three-phase parallel-moving type load plug-in strip, described three-phase parallel-moving type load plug-in strip is positioned at a horizontally disposed guide rail, and can carry out slippage along described guide rail, and described guide rail and described three-phase parallel-moving type load plug-in strip are fixed in described casing by a plug-in strip positioning supporting frame, two groups of described three phase isolated wires are introduced in the casing of described box low-voltage load transfer device respectively, and correspondingly with the two ends of described three-phase parallel-moving type load plug-in strip connect, the neutral line in three phase isolated wire described in two groups and described casing ground connection simultaneously.
2. a kind of low-voltage load transfer system according to claim 1, it is characterized in that: in described box low-voltage load transfer device, go between described in two groups pile crown, corresponding to upper copper bar and lower copper bar, is connected with the two ends up and down of described three-phase parallel-moving type load plug-in strip.
3. a kind of low-voltage load transfer system according to claim 2, is characterized in that: described upper copper bar and described lower copper bar outside are all enclosed with pyrocondensation insulating barrier.
4. a kind of low-voltage load transfer system according to claim 1, it is characterized in that: the three-phase parallel-moving type load plug-in strip in described box low-voltage load transfer device can be positioned at guide rail one end near described plug-in strip positioning supporting frame, described guide rail one end away from described plug-in strip positioning supporting frame can be positioned at, also can be positioned on the mid point of described guide rail.
5. a kind of low-voltage load transfer system according to claim 1, it is characterized in that: in described box low-voltage load transfer device, described three-phase parallel-moving type load plug-in strip connects a handle be positioned at outside described casing, and by the slippage of this handle realization on described guide rail.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420745327.7U CN204205595U (en) | 2014-12-02 | 2014-12-02 | A kind of low-voltage load transfer system |
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| CN201420745327.7U CN204205595U (en) | 2014-12-02 | 2014-12-02 | A kind of low-voltage load transfer system |
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| CN204205595U true CN204205595U (en) | 2015-03-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104362626A (en) * | 2014-12-02 | 2015-02-18 | 国网上海市电力公司 | Low-voltage load transferring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104362626A (en) * | 2014-12-02 | 2015-02-18 | 国网上海市电力公司 | Low-voltage load transferring system |
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