CN205212128U - Little generating line cross -over connection connecting cable line in screen top - Google Patents

Little generating line cross -over connection connecting cable line in screen top Download PDF

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Publication number
CN205212128U
CN205212128U CN201521125682.5U CN201521125682U CN205212128U CN 205212128 U CN205212128 U CN 205212128U CN 201521125682 U CN201521125682 U CN 201521125682U CN 205212128 U CN205212128 U CN 205212128U
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China
Prior art keywords
wire
connecting cable
little
screen top
bus
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CN201521125682.5U
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Chinese (zh)
Inventor
杨小东
高泓
吴国强
丁昊
马爱军
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State Grid Corp of China SGCC
Huzhou Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
Huzhou Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
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Priority to CN201521125682.5U priority Critical patent/CN205212128U/en
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Abstract

The utility model discloses a little generating line cross -over connection connecting cable line in screen top has solved among the prior art that the operational method wastes time and energy when changing the protection screen, dangerous big technical problem, the utility model discloses a little generating line cross -over connection connecting cable line in screen top, including four wires, the both ends of wire are connected with electrically conductive little bus -bar clamp respectively, one of them is equipped with the mechanism that is used for test wire both ends voltage difference the little bus -bar clamp that the wire both ends are connected.

Description

The little bus bar bridging connecting cable in a kind of screen top
[technical field]
The utility model relates to when protective relaying device in electric power system changes protection screen and shields the little bus bar bridging jockey in top, particularly relates to the little bus bar bridging connecting cable in a kind of screen top.
[background technology]
At present, there are a large amount of 110kV and above protective relaying device to need to change in network system, during replacing, generally adopt the mode changing whole protection screen.In old transformer station, the AC power of protective relaying device, DC power supply and secondary AC busbar voltage adopt the little bussed supply mode in screen top mostly.The flow process of current replacing protection screen operation is as follows: before being removed protection screen to be replaced, needing first the screen of copper circle to be pushed up little bus bar bridging, for guaranteeing other protection screen run not dead electricity in the cross-over connection course of work, must chargedly carry out.Current way is across protection screen to be replaced overlap joint temporary cable; little bus is generally containing protection power source bus, control power source bus, secondary alternating voltage bus; cable core need be connected on the screen top auxiliary bus-bar joint row of adjacent protection screen, and little bus temporary cable removes protection screen to be replaced after taking and leading to again.Again the little bus in screen top is communicated with after more renewing protection screen, removes temporary cable.During lap works, need two people to coordinate, little bus is first accessed in the side of a cable core by a people, and now, the opposite side of cable core is charged, and another people correctly accesses auxiliary bus-bar joint afterwards at opposite side voltmeter nuclear phase.Because little bus when temporary cable overlap joint and dismounting operation is charged; and the close together between little bus and access terminal, between adjacent little bus; careless slightly; AC and DC short circuit, ground connection will be caused; cause protection secondary PT broken string or protective device direct current dead electricity, run bring very large security risk to electrical network, equipment.And this work need be worked continuously aloft, and the time is long, and personnel easily produce fatigue, also brings risk to site safety.Therefore, existing on the little bus in protection screen screen top overlap joint and remove the operational method of temporary cable, have waste time and energy, dangerous large feature, be necessary to improve.
[utility model content]
Problem to be solved in the utility model is just to provide the little bus bar bridging connecting cable in a kind of screen top, has feature easy to use, safe.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
The little bus bar bridging connecting cable in a kind of screen top, comprise four wires, the two ends of described wire are connected to the small bus-bar clamp of conduction, the small bus-bar clamp that described wire two ends connect one of them be provided with voltage indicating mechanism for test lead both end voltage difference.
The little bus bar bridging connecting cable in screen top of the present utility model comprises four wires, the two ends of wire are connected to the small bus-bar clamp of conduction, wire two ends connect small bus-bar clamp one of them be provided with voltage indicating mechanism, voltage indicating mechanism is used for the voltage difference at test lead two ends, voltage difference namely between wire to be accessed and little bus to be connected, when the protection screen screen little busbar shiplap joint in top, the little bus in this side is first clamped with the small bus-bar clamp of indicating mechanism not with voltage in side, opposite side electricity consumption pressure indicating mechanism carry out nuclear phase correct after clamp the little bus of opposite side, the overlap joint of this mutually little bus can be completed.Compared to existing technologies, screen in the utility model pushes up little bus bar bridging connecting cable and has following benefit: 1, eliminate protection screen and change operation and need lay the operation process that temporary cable and temporary cable need access screen top auxiliary bus-bar joint row when overlapping little bus, very big improves work on the spot efficiency; 2, being arranged on small bus-bar clamp by voltage indicating mechanism, directly utilizing small bus-bar clamp to carry out nuclear phase, all needing to use voltmeter nuclear phase without the need to often overlapping mutually, substantially stopped the abnormal conditions overlapping the bus dead electricity caused of makeing mistakes, operational security is improved.3, can Reusability, save temporary cable cost.
First specific embodiments: described voltage indicating mechanism is arranged on four wires with on the small bus-bar clamp of one end.Design like this, the action of unified operating personnel, avoids the mistake produced during cross-operation.
Second specific embodiments: described small bus-bar clamp comprises the intermediate plate of two conductions, described intermediate plate comprises grip part and clamping section, the rear end of described two intermediate plates is fixedly connected with, and be connected with wire termination and conduct electricity, two clamping sections form jaws, are provided with the spring for jaws described in opening and closing between two grip parts.Design like this, structure is simple.
3rd specific embodiments: the rear end of described intermediate plate is connected by set bolt with wire termination.Be convenient to the installation and removal in later stage.
4th specific embodiments: described voltage indicating mechanism is arranged on the front end outer side of intermediate plate.Design like this, is convenient to the voltage difference between voltage indicating mechanism measurement little bus to be accessed and wire.
5th specific embodiments: described voltage indicating mechanism comprises interconnective measuring head and printed circuit board (PCB), described printed circuit board (PCB) is welded on the front end outer side of intermediate plate, described printed circuit board (PCB) comprises current-limiting resistance and light emitting display module, and described light emitting display module is provided with two indicator lights.Design like this, when the voltage difference produced when wire two ends is zero, two indicator lights are dark; When wire two ends produce DC voltage difference, an indicator light is bright, and when wire two ends produce AC voltage difference, two indicator lights are bright.
6th specific embodiments: described intermediate plate is copper intermediate plate.Conductive effect is better.
7th specific embodiments: described four wires are respectively yellow wire, green wire, red wire and black wire.Be convenient to A, B, C, N phase distinguishing voltage circuit, avoid wrong.
8th specific embodiments: be provided with soft insulation protective jacket outside described small bus-bar clamp.Design like this, can make operating personnel by pressing insulation protective jacket to open jaws by pressing spring and to clamp little bus, avoid Danger Electric shock risk occurs, fail safe is high.
9th specific embodiments: the outside being provided with voltage indicating mechanism in the small bus-bar clamp that described wire two ends connect is provided with red insulation protective jacket, is provided with black insulation protective jacket outside another.Design like this, is convenient to staff and whether distinguishes small bus-bar clamp with voltage indicating mechanism.
These features of the present utility model and advantage will embodiment below, exposure detailed in accompanying drawing.
[accompanying drawing explanation]
Below in conjunction with accompanying drawing, the utility model is described further:
Fig. 1 is the structural representation of the little bus bar bridging connecting cable in screen top in the utility model preferred embodiment;
Fig. 2 is the structural representation of wire in the utility model preferred embodiment;
Fig. 3 is the structural representation with voltage indicating mechanism small bus-bar clamp in the utility model preferred embodiment;
Fig. 4 is the vertical view of voltage indicating mechanism in the utility model preferred embodiment;
Fig. 5 is the circuit diagram of voltage indicating mechanism in the utility model preferred embodiment;
Fig. 6 is the view that in the utility model preferred embodiment, wire is connected with little bus.
[embodiment]
The technical scheme of accompanying drawing to the utility model embodiment below in conjunction with the utility model embodiment is explained and illustrated, but following embodiment is only preferred embodiment of the present utility model, and not all.Based on the embodiment in execution mode, those skilled in the art under the prerequisite not making creative work obtain other embodiments, all belong to protection range of the present utility model.
As shown in Fig. 1 to 2, in the utility model preferred embodiment, the little bus bar bridging connecting cable in screen top comprises four wires 11, and wire 11 is copper conductor, and cross-sectional area is 4mm 2, because alternating voltage exists A, B, C, N tetra-phase voltages, for the ease of distinguishing, prevent wire 11 wrong, four wires 11 are respectively yellow wire, green wire, red wire and black wire, namely the outside of four wires 11 is enclosed with yellow insulating barrier respectively, green insulating barrier, red insulating barrier and black insulating barrier, four wires 11 are wrapped in large insulating barrier 1, the two ends of wire 11 are connected to the small bus-bar clamp of conduction, small bus-bar clamp comprises the intermediate plate 20 of 2 conductions, intermediate plate 20 can be irony, silver or copper intermediate plate, in order to ensure good conductive effect and reduce production cost, intermediate plate 20 of the present utility model adopts copper intermediate plate, intermediate plate 20 comprises grip part 21 and clamping section 22, one end that intermediate plate 20 is connected with wire 11 is rear end, the other end is front end, the rear end of two intermediate plates 20 is fixedly connected with, and be connected with wire 11 end and conduct electricity, for the ease of follow-up dismounting and installation, rear end and the wire 11 of the intermediate plate 20 in the utility model adopt set bolt 4 to be connected, spring 23 is provided with between two grip parts 21, spring 23 is steel spring, two clamping sections 22 form jaws 24, with Compress Spring 23, jaws 24 is opened by pressing two grip parts 21, after the distress resolves of pressing grip part 21, spring 23 resets and closes jaws 24, two small bus-bar clamps one of them be also provided with voltage indicating mechanism 3, voltage indicating mechanism 3 is for detecting the voltage difference at wire 11 two ends.It is simple that small bus-bar clamp of the present utility model has structure, easy to operate feature.
Because small bus-bar clamp can conduct electricity, when using small bus-bar clamp to prevent staff, there is Danger Electric shock risk, soft insulation protective jacket is also provided with in the outside of small bus-bar clamp, such as Silicone Case or rubber protecting jacket, be convenient to staff's pressing, distinguish small bus-bar clamp fast for the ease of staff and whether be provided with voltage indicating mechanism 3, the utility model is at the soft insulating protective sleeve 5 of the small bus-bar clamp arranged outside redness with voltage indicating mechanism 3, be not provided with the soft insulating protective sleeve 6 of the small bus-bar clamp arranged outside black of voltage indicating mechanism 3, and the small bus-bar clamp be provided with voltage indicating mechanism 3 is connected to same one end of wire 11, be convenient to the action of uniform operational personnel, avoid producing mistake during two staff's cross-operation, and outward appearance is more attractive in appearance.
As shown in Fig. 3 to 6, the voltage difference between little bus 7 to be accessed and wire 11 is measured for the ease of voltage indicating mechanism 3, voltage indicating mechanism 3 of the present utility model is arranged on the front end outer side of intermediate plate 20, voltage indicating mechanism 3 comprises measuring head 31 and printed circuit board (PCB) 32, measuring head 31 is connected with printed circuit board (PCB) 32, printed circuit board (PCB) 32 is connected to the front end outer side of intermediate plate 20 by pad 33, namely on clamping section 22, printed circuit board (PCB) 32 is provided with current-limiting resistance R1 and light emitting display module, light emitting display module is provided with two indicator lights 320, light-emitting diode D1 and D2 that AC and DC is general is provided with in two indicator lights 320, the dark bright state of two indicator lights 320 is used to indicate the voltage difference whether wire 11 two ends produce voltage difference and generation and belongs to AC voltage difference or DC voltage difference.
During onsite application, the small bus-bar clamp of indicating mechanism 3 not with voltage is first clamped the little bus 7 of side, this side voltage is sent to offside circuit end by wire 11, measuring head 31 is contacted little bus 7 to be accessed by offside, whether the two ends that printed circuit board (PCB) 32 can show wire 11 have voltage difference, namely whether there is voltage difference between one end of wire 11 to be accessed and the other end, concrete detection method is as follows: A end is pad 33, B end is measuring head 31, between measuring head 31 and pad 33 during no-voltage difference, light-emitting diode D1 and D2 does not all work, two indicator lights 320 do not work, when producing direct voltage between measuring head 31 and pad 33, light-emitting diode D1 and D2 wherein one light, namely an indicator light 320 is bright, when producing alternating voltage between measuring head 31 and pad 33, light-emitting diode D1 and D2 lights simultaneously, and now two indicator lights 320 are bright.When small bus-bar clamp in the utility model clamps little bus 7, contact resistance is less than 10m Ω, connects 4mm 2four copper conductors 11 after pass into 20A electric current, stable temperature rise is less than 30K, meets GB14048.1-2012 table 2, and the copper terminal temperature rise of table 9 is less than the standard-required of 65K.Voltage difference indicating circuit index: DC differential pressure >=15V single indicator light 320 is bright, alternating voltage >=47V two indicator lights 320 are bright.Meet the application requirement of transformer station secondary system scene.Certainly, in other embodiments in the utility model, cable also can comprise multiple conducting wires, illustrates no longer one by one at this.
When protection screen is changed, use the overlap joint step of the little bus bar bridging connecting cable in screen top of the present utility model as follows: the staff of (1) side uses the small bus-bar clamp of indicating mechanism 3 not with voltage first to clamp the little bus 7 in this side, this side voltage is sent to offside circuit end by wire 11, i.e. pad 33; (2) measuring head 31 on small bus-bar clamp is contacted the little bus 7 of offside by offside staff, whether light-emitting diode D1 and D2 can show both sides has voltage difference, when both sides voltage difference is zero, two indicator lights 320 all do not work, and can clamp the little bus 7 of offside immediately with small bus-bar clamp; When there is voltage difference both sides, indicator light 320 is bright, can not press from both sides the little bus 7 in this side main, otherwise will cause short circuit; (3) repeat aforesaid operations, complete the temporary cable overlap joint of whole little bus.The little bus 7 in little bus bar bridging connecting cable overlap joint screen top, screen top of the present utility model is used to have following benefit: 1, to eliminate protection screen and change the operation process that temporary cable and temporary cable need access screen top auxiliary bus-bar joint row when operation overlaps little bus 7, need to be laid, alleviate the working strength of staff, operating efficiency is risen to original 3 times; 2, being arranged on small bus-bar clamp by voltage indicating mechanism 3, directly utilizing small bus-bar clamp to carry out nuclear phase, all needing to use voltmeter nuclear phase without the need to often overlapping mutually, substantially stopped the abnormal conditions overlapping the bus dead electricity caused of makeing mistakes, operational security is improved.3, can Reusability, save temporary cable cost.
The above; be only embodiment of the present utility model; but protection range of the present utility model is not limited thereto, is familiar with this those skilled in the art and should be understood that the content that the utility model includes but not limited to accompanying drawing and describes in embodiment above.Any amendment not departing from function and structure principle of the present utility model all will comprise within the scope of the appended claims.

Claims (10)

1. the little bus bar bridging connecting cable in screen top, it is characterized in that: comprise four wires, the two ends of described wire are connected to the small bus-bar clamp of conduction, the small bus-bar clamp that described wire two ends connect one of them be provided with voltage indicating mechanism for test lead both end voltage difference.
2. the little bus bar bridging connecting cable in screen top according to claim 1, is characterized in that: described voltage indicating mechanism is arranged on four wires with on the small bus-bar clamp of one end.
3. the little bus bar bridging connecting cable in screen top according to claim 1, it is characterized in that: described small bus-bar clamp comprises the intermediate plate of two conductions, described intermediate plate comprises grip part and clamping section, the rear end of described two intermediate plates is fixedly connected with, and be connected with wire termination and conduct electricity, two clamping sections form jaws, are provided with the spring for jaws described in opening and closing between two grip parts.
4. the little bus bar bridging connecting cable in screen top according to claim 3, is characterized in that: the rear end of described intermediate plate is connected by set bolt with wire termination.
5. the little bus bar bridging connecting cable in screen top according to claim 3, is characterized in that: described voltage indicating mechanism is arranged on the front end outer side of intermediate plate.
6. the little bus bar bridging connecting cable in screen top according to claim 5, it is characterized in that: described voltage indicating mechanism comprises interconnective measuring head and printed circuit board (PCB), described printed circuit board (PCB) is welded on the front end outer side of intermediate plate, described printed circuit board (PCB) comprises current-limiting resistance and light emitting display module, and described light emitting display module is provided with two indicator lights.
7. push up little bus bar bridging connecting cable according to the screen one of claim 3 to 6 Suo Shu, it is characterized in that: described intermediate plate is copper intermediate plate.
8. push up little bus bar bridging connecting cable according to the screen one of claim 1 to 6 Suo Shu, it is characterized in that: described four wires are respectively yellow wire, green wire, red wire and black wire.
9. push up little bus bar bridging connecting cable according to the screen one of claim 1 to 6 Suo Shu, it is characterized in that: outside described small bus-bar clamp, be provided with soft insulation protective jacket.
10. the little bus bar bridging connecting cable in screen top according to claim 9; it is characterized in that: the outside being provided with voltage indicating mechanism in the small bus-bar clamp that described wire two ends connect is provided with red insulation protective jacket, is provided with black insulation protective jacket outside another.
CN201521125682.5U 2015-12-29 2015-12-29 Little generating line cross -over connection connecting cable line in screen top Active CN205212128U (en)

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Application Number Priority Date Filing Date Title
CN201521125682.5U CN205212128U (en) 2015-12-29 2015-12-29 Little generating line cross -over connection connecting cable line in screen top

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Application Number Priority Date Filing Date Title
CN201521125682.5U CN205212128U (en) 2015-12-29 2015-12-29 Little generating line cross -over connection connecting cable line in screen top

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105490122A (en) * 2015-12-29 2016-04-13 国网浙江省电力公司湖州供电公司 Screen-top miniature bus bridging-connection cable
CN106898901A (en) * 2017-04-13 2017-06-27 国网福建省电力有限公司 A kind of current terminal for reflecting current loop running status
CN109412113A (en) * 2018-12-13 2019-03-01 国网河南省电力公司洛阳供电公司 A kind of portable small bus jump exchange device
CN109728528A (en) * 2018-12-29 2019-05-07 国网山东省电力公司聊城供电公司 A kind of device and its working method for being exclusively used in screen in substation and pushing up small bus bar bridging

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105490122A (en) * 2015-12-29 2016-04-13 国网浙江省电力公司湖州供电公司 Screen-top miniature bus bridging-connection cable
CN106898901A (en) * 2017-04-13 2017-06-27 国网福建省电力有限公司 A kind of current terminal for reflecting current loop running status
CN109412113A (en) * 2018-12-13 2019-03-01 国网河南省电力公司洛阳供电公司 A kind of portable small bus jump exchange device
CN109412113B (en) * 2018-12-13 2023-08-25 国网河南省电力公司洛阳供电公司 Portable small bus jumping device
CN109728528A (en) * 2018-12-29 2019-05-07 国网山东省电力公司聊城供电公司 A kind of device and its working method for being exclusively used in screen in substation and pushing up small bus bar bridging

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