CN204633457U - High-tension circuit shunting device - Google Patents
High-tension circuit shunting device Download PDFInfo
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- CN204633457U CN204633457U CN201520391051.1U CN201520391051U CN204633457U CN 204633457 U CN204633457 U CN 204633457U CN 201520391051 U CN201520391051 U CN 201520391051U CN 204633457 U CN204633457 U CN 204633457U
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Abstract
The utility model provides high-tension circuit shunting device, relates to high voltage supply field.The high-tension circuit shunting device that the utility model embodiment provides, by the mode adopting high-voltage switch gear to carry out bypass isolation, the isolating switch at pressure reducing device two ends can be disconnected, and final utilization high-voltage switch gear carries out bypass to pressure reducing device, thus make pressure reducing device to overhaul normally and to change, and be bear power delivery task by high-voltage switch gear place circuit at the device of maintenance and replacing, normal power supply can not be affected, thus, the reliability of power supply is which increased.
Description
Technical field
The utility model relates to high voltage supply field, in particular to high-tension circuit shunting device.
Background technology
The appearance of electric energy, revolutionizes traditional labor style, and along with the exploitation of electric energy, produces and occurred increasing power consumption equipment in life.Along with the further exploitation of electric energy, the requirement about power supply quality and reliability, Electrical Safety also progressively increases, and especially in high voltage electric field, the industry standards such as electricity consumption specification, high-tension electricity operation manual have occurred more and more.The main purpose that these industry standards occur is in order to avoid the generation with electrification, but some time in order to avoid the generation of accident, people need to consume a large amount of time and expense usually to carry out maintenance and the replacing of some device.
As when carrying out electric energy long-distance transmissions; power station (or terminal) and power consumption equipment apart from each other; be subject to the impact of power transmission cable dividing potential drop effect; power station send electric energy voltage usually can higher than power consumption equipment obtain the voltage of electric energy; in some cases, power consumption equipment obtain electric energy voltage even cannot ensure the normal work of this equipment.In view of this, common solution arranges voltage regulator (also can be called transformer), by the mode of multi-stage pressure regulating, ensures the normal operation of power consumption equipment.If power station and power consumption equipment are at a distance of 100 kilometers, so a voltage regulator can be set in distance 50 kilometers, power station, improve the voltage flowing to power consumption equipment electric energy.Along with the prolongation of service time, just need to overhaul voltage regulator and change, in order to avoid live line working, need the power-off of voltage regulator place circuit to fall, behind closedown power down source, just can start maintenance and changed, so just can ensure the safety of maintainer.But before maintenance completes or changed, the circuit at voltage regulator place is in off state, and this can affect the work of corresponding power consumption equipment greatly, and then brings a large amount of economic losses and social influence always.
Having more than is voltage regulator, any two ends have the equipment (hereinafter referred to as pressure reducing device) of pressure drop (voltage of input and output is unequal) all to have this kind of problem, in high-tension electricity application, be do not allow under the state that pressure reducing device is charged, directly open the switch that controls pressure reducing device operating state.As shown in Figure 1, the circuit at a kind of pressure reducing device (voltage regulator 14) place is provided.In figure, switch 12 (the first switch) and switch 13 (second switch) lay respectively at the left and right sides of voltage regulator 14, and switch 12 and switch 13 are isolating switch, simultaneously, switch 12 and switch 13 are normally closed switch, voltage regulator 14 is when normal use, these two switches are in closure state, but when voltage regulator 14 needs repairing time, directly can not open switch 12 and switch 13, be merely able to, after the circuit general supply 11 closing left side, can overhaul voltage regulator and change.This power consumption equipment 15 just causing right side cannot carry out work normally.
To sum up, in prior art, when pressure reducing device needs to carry out inspection and maintenance, need the power-off of pressure reducing device place circuit, and then cause the out of service of corresponding power consumption equipment.
Utility model content
In view of this, the object of the utility model embodiment is to provide high-tension circuit shunting device, during to reduce maintenance pressure reducing device, and the shut-in time of other equipment.
First aspect, the utility model embodiment provides high-tension circuit shunting device, comprising:
At the first isolating switch away from the first interface of pressure reducing device side, the second interface between the first isolating switch and pressure reducing device, and be positioned at three interface of the second isolating switch away from pressure reducing device side;
Be connected to the first branch road between first interface and the second interface;
Be connected to the second branch road between first interface and the 3rd interface;
First branch road and the second branch road are provided with high-voltage switch gear, and high-voltage switch gear can be the one in following multiple switch, circuit breaker, on-load switch and automatic circuit.
In conjunction with first aspect, the utility model embodiment provides the first possible execution mode of first aspect, wherein, also comprises setting the first fuse on the first leg.
In conjunction with first aspect, the utility model embodiment provides the possible execution mode of the second of first aspect, wherein, between the high-voltage switch gear of the first fuse on first interface and the first branch road.
In conjunction with first aspect, the utility model embodiment provides the third possible execution mode of first aspect, wherein, between the high-voltage switch gear of the first fuse also on first interface and the second branch road.
In conjunction with first aspect, the utility model embodiment provides the 4th kind of possible execution mode of first aspect, wherein, also comprises: with the by-pass switch of the second branch circuit parallel connection.
In conjunction with first aspect, the utility model embodiment provides the 5th kind of possible execution mode of first aspect, wherein, also comprises: normally closed relay, and the contact site of normally closed relay is on the first branch road, and the operating member of normally closed relay is connected on the second branch road.
In conjunction with first aspect, the utility model embodiment provides the 6th kind of possible execution mode of first aspect, wherein, also comprises timer and step switch,
Timer, starts timing after disconnecting for high-voltage switch gear on the first leg, and to step switch sending action signal after the timing scheduled time;
Step switch, for when getting actuating signal, the high-voltage switch gear controlled on the second branch road closes.
In conjunction with first aspect, the utility model embodiment provides the 7th kind of possible execution mode of first aspect, wherein, also comprises the second fuse be arranged on the second branch road.
In conjunction with first aspect, the utility model embodiment provides the 8th kind of possible execution mode of first aspect, and wherein, also comprise geometrical clamp, geometrical clamp comprises clamping section and fixed part, and fixed part is fixedly connected with the insulation sheath of parcel the first branch road or the second branch road.
In conjunction with first aspect, the utility model embodiment provides the 9th kind of possible execution mode of first aspect, and wherein, geometrical clamp is multiple, and is evenly distributed on the first branch road or the second branch road.
For electric power system or user, ensure that reliably continued power is its top priority, improving power supply reliability level is the common needs of the whole society, and the important indicator weighing power supply reliability level is exactly average interruption duration or average service restoration time.In this index, China also has larger gap compared with developed countries.Therefore live line working is greatly developed and user's uninterrupted operation is the important channel and the Main Means that improve electric power system user dependability.
The high-tension circuit shunting device that the utility model embodiment provides, high-voltage switch gear is adopted to carry out the mode of bypass, with prior art, when pressure reducing device safeguarded by needs, pressure reducing device can only be stopped by the mode of closing pressure reducing device place circuit general supply charged, and then cause other power consumption equipments of pressure reducing device place circuit also cannot normally work comparing, it is provided with first interface, second interface and the 3rd interface, and make first interface be positioned at the side of the first isolating switch away from pressure reducing device, second interface is between the first isolating switch and pressure reducing device, 3rd interface is positioned at the side of the second isolating switch away from pressure reducing device, and connect first interface and the second interface defines the first branch road, connection first interface and the 3rd interface define the second branch road, and on the first branch road and the second branch road, be all provided with high-voltage switch gear, after making the high-voltage switch gear on the first branch road can carry out bypass to the first isolating switch, open the first isolating switch, then, after high-voltage switch gear on closedown first branch road, open rapidly the high-voltage switch gear on the second branch road, thus pressure reducing device is bypassed by the second branch road, originally through the electric energy of pressure reducing device, can be transmitted by the second branch road, (now can overhaul pressure reducing device and change) in the uncharged situation of pressure reducing device, recover the power supply of circuit originally fast.
For making above-mentioned purpose of the present utility model, feature and advantage become apparent, preferred embodiment cited below particularly, and coordinate appended accompanying drawing, be described in detail below.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, be briefly described to the accompanying drawing used required in embodiment below, be to be understood that, the following drawings illustrate only some embodiment of the present utility model, therefore the restriction to scope should be counted as, for those of ordinary skill in the art, under the prerequisite not paying creative work, other relevant accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 shows in correlation technique, the schematic diagram of pressure reducing device place circuit;
Fig. 2 shows the basic circuit application schematic diagram of the high-tension circuit shunting device that the utility model embodiment provides;
Fig. 3 shows the optimized circuit application schematic diagram of the high-tension circuit shunting device that the utility model embodiment provides;
Fig. 4 shows the operating procedure flow chart of the high-tension circuit shunting device that the utility model embodiment provides;
Fig. 5 shows the example schematic of the high-tension circuit shunting device that the utility model embodiment provides.
Embodiment
Below in conjunction with accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.The assembly of the utility model embodiment describing and illustrate in usual accompanying drawing herein can be arranged with various different configuration and design.Therefore, below to the detailed description of the embodiment of the present utility model provided in the accompanying drawings and the claimed scope of the present utility model of not intended to be limiting, but selected embodiment of the present utility model is only represented.Based on embodiment of the present utility model, the every other embodiment that those skilled in the art obtain under the prerequisite not making creative work, all belongs to the scope of the utility model protection.
Along with the prolongation of electrical appliance service time, each electrical appliance can run into part aging, the phenomenon such as malfunctioning, the generation of these phenomenons can directly cause with electrification, in order to avoid the generation with electrification, can specify regularly to check electrical appliance, safeguard and change, to reduce the probability of happening with electrification.
Usually, when carrying out overhaul of the equipments, replacing, be that mandatory requirement can not live line working, especially in high-tension electricity field, live line working is absolute prohibition, therefore must get an electric shock needing the electrical appliance power-off of maintenance to prevent maintainer.As shown in Figure 1, give in correlation technique and have power supply, voltage regulator (mainly referring to input and output end voltage value electrical appliance, i.e. pressure reducing device not etc.) and meet (energy consumption equipment as general in motor, electric light etc.).Switch A (the first isolating switch) on the left of voltage regulator and the switch B (the second isolating switch) on right side can only when not having electric current deciliter, therefore, when carrying out overhaul of the equipments, not by disconnecting the mode of the first isolating switch or the second isolating switch to cut off voltage regulator, and if disconnect the first isolating switch or the second isolating switch, load then can be caused to get electric energy, equally, powered-down, also load can be caused to get electric energy, and other electrical appliances namely on circuit can not in normal work.This can directly cause productive life normally to carry out.In view of this, the time that load cannot obtain electric energy should be reduced as far as possible, namely guarantee voltage regulator (pressure reducing device) can (voltage regulator be not charged under uncharged prerequisite, band can carry out inspection and maintenance to voltage regulator), recover the power supply of voltage regulator place circuit as soon as possible.
In practical operation, line length is very long, can not in order to the maintenance of some equipment powered-down.Therefore, as shown in Figure 2, the high-tension circuit shunting device that the application provides comprises:
At the first isolating switch 22 away from the first interface 21 of pressure reducing device 20 side, the second interface 23 between the first isolating switch 22 and pressure reducing device 20, and be positioned at three interface 25 of the second isolating switch 24 away from pressure reducing device 20 side;
Be connected to the first branch road 26 between first interface 21 and the second interface 23;
Be connected to the second branch road 27 between first interface 21 and the 3rd interface 25;
First branch road 26 and the second branch road 27 are provided with high-voltage switch gear, and high-voltage switch gear can be the one in following multiple switch, circuit breaker, on-load switch and automatic circuit.
In Fig. 2, high-voltage switch gear (the first high-voltage switch gear 28) on first branch road 26 and the high-voltage switch gear (the second high-voltage switch gear 29) on the second branch road 27 are all high-voltage switch gears, namely, high-voltage switch gear be can cut off normal duty fast enough cut-off equipment, meet the switch that this kind requires, as circuit breaker (high pressure), on-load switch and automatic circuit.Just consider Cost Problems, preferably adopt automatic circuit, but according to the difference of occasion, other switches also can be selected as high-voltage switch gear.
The input that pressure reducing device 20 refers to and output have the equipment of voltage difference; as the electrical appliance (referring to that input and output have the electrical appliance of voltage difference) under transformer, voltage regulator, malfunction; according to " five prevent " requirement according to electric power system; do not allow directly to use by-pass switch 31 when lacking protection; first interface 21 and the 3rd interface 25 in connection; bypass is carried out to pressure reducing device 20; this kind of bypass mode equals direct short-circuit; may equipment burnout be caused, even cause personal safety accident.Thus, run into need close, or change pressure reducing device 20 time, following several step can be divided into carry out:
1, closed first high-voltage switch gear 28;
2, disconnect the first isolating switch 22;
3, disconnect the first high-voltage switch gear 28;
4, closed second high-voltage switch gear 29;
5, disconnect the second isolating switch 24.
After this five steps, the branch road (the second branch road 27) originally transferred to through the second high-voltage switch gear 29 place through the electric current of pressure reducing device 20 is powered, and can not affect the normal operation of upstream and downstream equipment.Instantaneous powering-off state is had the 3rd, between 4 steps, therefore, when executable operations, The faster the better for the speed that the 3rd step and the 4th step should be required to be connected, control as the corresponding device such as relay, trigger can be adopted, to ensure that the second high-voltage switch gear 29 can close as soon as possible, is circulated by the second branch road 27 to enable source current after the first high-voltage switch gear 28 disconnects.
It should be noted that, first interface 21 is interfaces that the first branch road 26 and the second branch road 27 access pressure reducing device 20 place circuit, this interface should not limit its concrete existence form, namely first interface 21 can be an interface unit (as USB interface, optical cable interface, cable interface etc. use interface device be connected to cable end the interface that formed, use this kind of interface can patch with the interface direct on the cable of pressure reducing device 20 place to pull out), also can only have exposed cable (referring to the cable end not having interface device to connect).On just first branch road 26 of first interface 21 indication, can carry out with pressure reducing device 20 place cable the point that is connected.In like manner, the second interface 23 and the 3rd interface 25 also refer to and can carry out with pressure reducing device 20 place cable the point that is connected.
Further, first interface 21 can be existence two, also can have one.Namely the first branch road 26 and the second branch road 27 use different first interfaces 21 to be connected with the circuit at pressure reducing device 20 place respectively, also can be that the first branch road 26 uses same first interface 21 to be connected with the circuit at pressure reducing device 20 place with the second branch road 27.These two kinds of connected modes, all can realize this programme, at this, no longer too much illustrate.
In order to improve the fail safe of the high-tension circuit shunting device that the application provides, this shunting device also comprises the first fuse be arranged on the first branch road 26.
Fuse refers to when electric current exceedes setting, with the heat that itself produces, melt is fused, a kind of electrical equipment of open circuit.When carrying out overhaul of the equipments, during as the 1st in 5 steps that describe above, 2 step, first branch road 26 can bear larger electric current (when the first step instantaneously, first high-voltage switch gear 28 is in parallel with the first isolating switch 22, and average share current, when second step, then by the first high-voltage switch gear 28 share current alone), now, in order to ensure the safety of pressure reducing device 20 and relevant device, a fuse installed by the first branch road 26 is very necessary.Wherein, consider that the situation of outdoor maintenance is in the majority, the first fuse is preferably fuse switch.
In fact, the first fuse should not limit its form existed, and any device with overcurrent protection function all within the protection range of the application, as increased current sensor, should obtain the current value of the first branch road 26; Comparator, compares the current value of the first branch road 26 and the size of predetermined standard current value, and when the current value of the first branch road 26 is greater than predetermined standard current value, generates shutdown signal; Controller, in time receiving shutdown signal, controls the first high-voltage switch gear 28 and disconnects, or controls other switch disconnection on the first branch road 26, to reach the object making the first branch road 26 open circuit.
In order to avoid the phenomenon of rush of current, the first fuse is preferably placed between the high-voltage switch gear on first interface 21 and the first branch road 26.
Certainly, when the first branch road 26 and the second branch road 27 share same first interface 21 time, the first fuse can be made to be that the first branch road 26 and the second branch road 27 work simultaneously, namely the first fuse is except between the high-voltage switch gear on first interface 21 and the first branch road 26, between the high-voltage switch gear also on first interface 21 and the second branch road 27.
When the first branch road 26 and the second branch road 27 points use one first interface 21 time, then need to arrange the second fuse on the first branch road 26.Wherein, the first fuse and the second fuse can be all fuse switches.
As shown in Figure 3, the high-tension circuit shunting device that the application provides, also comprises except having the first branch road 26 and the second branch road 27: the by-pass switch 31 in parallel with the second branch road 27.
By setting up by-pass switch 31, after the first isolating switch 22, pressure reducing device 20 and the second isolating switch 24 bypass by the second high-voltage switch gear 29, the second high-voltage switch gear 29 can be quit work, makes the bypass condition that circuit recovers general.When concrete operations, can after above, five steps terminate, increase the 6th, 7 steps, namely:
1, closed first high-voltage switch gear 28;
2, disconnect the first isolating switch 22;
3, disconnect the first high-voltage switch gear 28;
4, closed second high-voltage switch gear 29;
5, disconnect the second isolating switch 24;
6, closes bypass switch 31;
7, disconnect the second high-voltage switch gear 29.
And then the operating procedure of 7 shown in formation Fig. 4.
In order to ensure that the second branch road 27 can after the first branch road 26 disconnects, be energized comparatively fast, namely after the first high-voltage switch gear 28 disconnects, second high-voltage switch gear 29 closes comparatively fast, the high-tension circuit shunting device that the application provides can also increase: normally closed relay, the contact site of normally closed relay is on the first branch road 26, and the operating member of normally closed relay is connected on the second branch road 27.
When the contact of normally closed relay is not energized, operating member (switch) is in closure state, during the energising of contact, operating member is in off-state, namely in Fig. 4, before step 1 performs, the first branch road 26 is not energized, now the operating member of normally closed relay is in closure state, after step 1 performs, the first branch road 26 is energized, now, contact is energized, and operating member is in off-state.Time step 3 performs, because the first high-voltage switch gear 28 disconnects, therefore operating member has been transformed into closure state from disconnection, is exactly that after the first high-voltage switch gear 28 disconnects, as long as the second high-voltage switch gear 29 is in closure state, then the second branch road 27 just can become path.Therefore, when concrete execution, can by step 4 and step 3 reversed order, before closed second high-voltage switch gear 29, first disconnect the first high-voltage switch gear 28, now, because the first branch road 26 is still in path, the operating member of normally closed relay is in off-state, and the second branch road 27 can not be energized.And after the first high-voltage switch gear 28 disconnects, namely after the first branch road 26 power-off, the operating member of normally closed relay is changed into closed by disconnection, and the second branch road 27 just becomes path naturally, and the response time difference of relay is very little, and therefore, power-off time also can be very short.In order to ensure response speed, controllable silicon relay can be adopted.
Except the power on/off situation by above-mentioned use first branch road 26, carry out the mode of trigging control second branch road 27, can also by identifying that the mode of the first high-voltage relay controls the second branch road 27.Concrete, the high-tension circuit shunting device that the application provides, also comprises timer and step switch,
Timer, starts timing after disconnecting for the high-voltage switch gear on the first branch road 26, and to step switch sending action signal after the timing scheduled time;
Step switch, for when getting actuating signal, the high-voltage switch gear controlled on the second branch road 27 closes.
Namely, timing after disconnecting at the first high-voltage switch gear 28, when after timing to the scheduled time, then trigger action switch motion, and then control the break-make of the second branch road 27.In fact, step switch can be the second high-voltage switch gear 29, also can be the switch of control second high-voltage switch gear 29.After the first high-voltage switch gear 28 action, the first branch road 26 might not at once can power-off, therefore, in order to ensure the fail safe operated, needing to carry out corresponding delay disposal, namely carrying out time delay by timer.Certainly, reach delay function except electronic timer (counter), also mechanical timer (as SH-892D electric mechanical timer).
In order to can preferably the cable of high-tension circuit shunting device with pressure reducing device 20 place be connected, the high-tension circuit shunting device that the application provides also comprises geometrical clamp, geometrical clamp comprises clamping section and fixed part, and fixed part is fixedly connected with the insulation sheath of parcel the first branch road 26 or the second branch road 27.
Clamping section is as removable fixation means such as pliers mouths.
Further, geometrical clamp can be set to multiple, and is evenly distributed on the first branch road 26 or the second branch road 27.
Below, use a specific embodiment that the high-tension circuit shunting device that the application provides is described.
As shown in Figure 5, according to electric power overhaul " five prevent " requirement, in order to safety, be do not allow directly to open the first isolating switch 55 and the second isolating switch 57 in charged situation, therefore, must first these two isolating switches be bypassed.The effect in automatic circuit 53 loop is just used to bypass first isolating switch 55.
1, first isolating switch 55 both sides voltage is identical, so can carry out bypass to the first isolating switch 55 easily by automatic circuit 53 loop.After the automatic circuit 53 that closes, can open the first isolating switch 55, electric current still keeps conducting by automatic circuit 53 loop and voltage regulator 56 loop;
2, open automatic circuit 53, at this moment voltage regulator 56 one end is in off-state, and the first isolating switch 55 is also in open mode, has had 1 visual fracture;
3, while opening automatic circuit 53, send instruction by controller, automatic circuit 54 is closed, at this moment electric current is communicated with load by automatic circuit 54 loop, and whole voltage regulator 56 loop has all been bypassed; Just can ensure that this operating time is exactly the interruption duration in voltage regulator 56 loop by digital controller, generally be no more than 10 cycles.(automatic circuit 53 disconnects needs 3 cycles, and 2 cycles wait for that time delay guarantees that automatic circuit 53 disconnects completely, and need 5 weeks Bo – automatic circuit operating times shorter if automatic circuit 54 is closed, interruption duration can also shorten.The power failure of 10 cycles can not cause significant impact to load).
4, after voltage regulator 56 loop is bypassed, the second isolating switch 57 just can be opened, and just there has been visual fracture such voltage regulator 56 both sides, after meeting the condition of two visual fractures required by maintenance procedure, just can keep in repair voltage regulator 56 and change;
5, after bypass isolating switch of closing, can open automatic circuit 54, shunting device just can remove.
If there is no automatic circuit 53 loop, just by power failure in short-term, the first isolating switch 55 is not opened; Automatic circuit 54 loop if directly closed, is just equivalent to, by voltage regulator 56 loop direct short-circuit, can cause personal injury and device damage, is also that code institute is unallowed.
Operating procedure is specially:
Step 1:
Automatic circuit (or on-load switch, circuit breaker) and fuse switch 52 as shown in Figure 3.Notice that automatic circuit 53 one end is connected in the middle of the first isolating switch 55 and voltage regulator 56, automatic circuit 54 one end is the lower end being connected on the second isolating switch 57.The connection of each parts can complete in the energized state.
Fuse 52 is closure states, and two automatic circuits are all in open mode.
Step 2: close automatic circuit 53:
Automatic circuit 54 stays open.After this step completes, automatic circuit 53 (by fuse 52) and the first isolating switch 55 are in parallel connection and realize shunting.
Step 3: open the first isolating switch 55:
After this step completes, automatic circuit 53 bears load.Voltage regulator 56 is still in electriferous state.
Step 4: open automatic circuit 53 (can be operated by digital reclosing controller):
After this step completes, power supply has just been disconnected.The object opening automatic circuit 53 is in order to after the automatic circuit 54 that closes rapidly, is that electric current passes through from automatic circuit 54, thus by voltage regulator 56 loop bypass.
Step 5: close automatic circuit 54:
Restored electricity by automatic circuit 54.Voltage regulator 56 is bypassed.Automatic circuit 54 closed can be realize (also can with a special purpose relay) by digital controller.Automatic circuit 53 is opened and is approximately 10 cycles with the time interval of the closed centre of automatic circuit 54.(automatic circuit 53 disconnects needs 3 cycles, and 2 cycles wait for that time delay guarantees that automatic circuit 53 disconnects completely, and need 5 weeks Bo – automatic circuit operating times shorter if automatic circuit 54 is closed, interruption duration can also shorten.The power failure of 10 cycles can not cause significant impact to load).
Step 6: open the second isolating switch 57:
After first isolating switch 55 and the second isolating switch 57 are all opened, just there have been two visual fractures voltage regulator 56 both sides.Load keeps being communicated with by automatic circuit 54 all the time.. (mentioned above, according to " five prevent " requirement, isolating switch does not allow on-load operation, otherwise will scaling loss equipment or cause personal safety accident; On-load switch, circuit breaker and automatic circuit all can cut-off load, so just can carry out this kind of operation).
Step 7: close by-pass switch 51:
Now, automatic circuit 2 is communicated with by-pass switch 51 simultaneously.
Step 8 (final step): open automatic circuit 54:
Load is communicated with by by-pass switch 51.
So far, all equipment all can remove.
In about 10 cycles, the first isolating switch 55 and the second isolating switch 57 are in be opened, and by-pass switch 51 is in closure state, can repair or replace voltage regulator 56 safely.
Compared with correlation technique, the power failure of correlation technique usually can cause a few hours even longer time, for general user, direct economic loss may be more limited, but serve negative social effect to being also with power supply enterprise.And in some important electricity consumption occasions, its direct economic loss is very huge.
The high-tension circuit shunting device that the application provides; first its maximum feature is exactly guarantee safety; first can the equipment of quick-speed turning on-off load be protected by fuse 52 pairs of automatic circuits or other; then come to carry out bypass to voltage regulator 56 loop safely by the pass closing operation of automatic circuit; again the by-pass switch 51 often opened is closed; then just at electriferous state, shunting device can be removed, and then fault voltage regulator 56 is keeped in repair and changed.
Guaranteeing under safe prerequisite, the switching time between automatic circuit 53 and 54 is controlled by controller, interruption duration (time between the first branch road power-off and the energising of the second branch road) can be controlled the shortest as several cycle, substantially can not impact user, namely the direct economic loss that user causes because of power failure can be controlled minimum, and implementation cost is very low.
Therefore, this is a kind of solution that customer outage hours can be controlled in the shortest effective low cost.
The high-tension circuit shunting device that the application provides is a kind of solution that customer outage hours can be controlled in the shortest effective low cost.It can be widely used in needs will have hidden danger or out of order equipment occasion out of service, so be not merely applicable to safeguard or the occasion of maintenance voltage regulator 56.
First isolating switch 55 and the second isolating switch 57 and by-pass switch 51 can as the conventional configurations of of voltage regulator 56 loop, long-term fixing is arranged on loop with voltage regulator 56, parts of the high-tension circuit shunting device that also by-pass switch 51 can be provided as the application, take onsite application to when overhauling.By-pass switch 51 and automatic circuit etc. all can be designed to band plug-in type cable interface, are directly inserted by the cable end of flexible cable for connecting and realize connecting, but then must guarantee when disconnecting not on-load time could directly extract.
Generally, each parts connect by the rubber-insulated flexible cable with pluggable cable end or wire clamp of sufficient length.If voltage regulator 56 is connected with overhead transmission line, can first with wire clamp, by-pass switch 51 one end with automatic circuit 53 be connected with overhead wire during maintenance; If voltage regulator 56 is connected on cable, and the design and installation of by-pass switch 51 in early stage is in voltage regulator 56 loop, voltage regulator 56 and by-pass switch 51 all design with plug-in type cable interface, each several part just can realize being communicated with by so direct being plugged by cable, otherwise, according to " five prevent " requirement, just after necessary transient-power failure, after being connected with cable with one end of automatic circuit 53 by by-pass switch 51, just above operation can be carried out.
If automatic circuit 53 and 54 can of short duration to complete operation in unnoticed interruption duration, digital reclosing controller (or digital relay etc. can control the controller of automatic circuit 53 and automatic circuit 54 break-make) is not required.And had many three-phase automatic circuits to support single phase operation now, so completely can only with a function supporting the three-phase automatic circuit of single phase operation to realize 53 and 54 two automatic circuits (certainly, using three-phase automatic circuit to be also just equivalent to two single phase recloser work in combination).
The above; be only embodiment of the present utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; change can be expected easily or replace, all should be encompassed within protection range of the present utility model.Therefore, protection range of the present utility model should described be as the criterion with the protection range of claim.
Claims (10)
1. high-tension circuit shunting device, is characterized in that, comprising:
At the first isolating switch away from the first interface of pressure reducing device side, the second interface between the first isolating switch and pressure reducing device, and be positioned at three interface of the second isolating switch away from pressure reducing device side;
Be connected to the first branch road between described first interface and described second interface;
Be connected to the second branch road between described first interface and described 3rd interface;
Described first branch road and described second branch road are provided with high-voltage switch gear, and described high-voltage switch gear can be the one in following multiple switch, circuit breaker, on-load switch and automatic circuit.
2. high-tension circuit shunting device according to claim 1, is characterized in that, also comprises the first fuse be arranged on described first branch road.
3. high-tension circuit shunting device according to claim 2, is characterized in that, between the high-voltage switch gear of described first fuse on described first interface and described first branch road.
4. high-tension circuit shunting device according to claim 3, is characterized in that, between the high-voltage switch gear of described first fuse also on described first interface and the second branch road.
5. high-tension circuit shunting device according to claim 1, is characterized in that, also comprise: with the by-pass switch of described second branch circuit parallel connection.
6. high-tension circuit shunting device according to claim 1, is characterized in that, also comprise: normally closed relay, and the contact site of described normally closed relay is on described first branch road, and the operating member of described normally closed relay is connected on described second branch road.
7. high-tension circuit shunting device according to claim 1, is characterized in that, also comprises timer and step switch,
Described timer, starts timing after the high-voltage switch gear on described first branch road disconnects, and to described step switch sending action signal after the timing scheduled time;
Step switch, for when getting actuating signal, the high-voltage switch gear controlled on described second branch road closes.
8. high-tension circuit shunting device according to claim 2, is characterized in that, also comprises the second fuse be arranged on described second branch road.
9. high-tension circuit shunting device according to claim 2, is characterized in that, also comprise geometrical clamp, and described geometrical clamp comprises clamping section and fixed part, and described fixed part is fixedly connected with the insulation sheath of described first branch road of parcel or described second branch road.
10. high-tension circuit shunting device according to claim 9, is characterized in that, described geometrical clamp is multiple, and is evenly distributed on described first branch road or described second branch road.
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| CN201520391051.1U CN204633457U (en) | 2015-06-09 | 2015-06-09 | High-tension circuit shunting device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520391051.1U CN204633457U (en) | 2015-06-09 | 2015-06-09 | High-tension circuit shunting device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104868581A (en) * | 2015-06-09 | 2015-08-26 | 武汉希麦特科技有限公司 | Bypass device of high-voltage circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104868581A (en) * | 2015-06-09 | 2015-08-26 | 武汉希麦特科技有限公司 | Bypass device of high-voltage circuit |
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