CN207743615U - A kind of ring main unit realized cable fault and intelligently cut soon - Google Patents

A kind of ring main unit realized cable fault and intelligently cut soon Download PDF

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Publication number
CN207743615U
CN207743615U CN201721636129.7U CN201721636129U CN207743615U CN 207743615 U CN207743615 U CN 207743615U CN 201721636129 U CN201721636129 U CN 201721636129U CN 207743615 U CN207743615 U CN 207743615U
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China
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main unit
ring main
shell
current transformer
cable fault
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CN201721636129.7U
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查祺
邵旋
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Anhui Broad Kei Intelligent Electrical Appliance Ltd By Share Ltd
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Anhui Broad Kei Intelligent Electrical Appliance Ltd By Share Ltd
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Abstract

The utility model discloses a kind of ring main units realized cable fault and intelligently cut soon, belong to intelligent power equipment technical field.It includes the plug-in pedestal for being socketed plugging member, and inlet wire cable is introduced ring network cabinet body;Current transformer, level is set on the plug-in pedestal, for acquiring current signal.The utility model accesses convenient for the installation of inlet wire cable by optimizing the internal structure of ring main unit, improves working efficiency, realize the intelligentized control method of failure, promoted the use of conducive to the intelligence of ring main unit, have the advantages that simple structure and reasonable design, easily fabricated.

Description

A kind of ring main unit realized cable fault and intelligently cut soon
Technical field
The utility model belongs to intelligent power equipment technical field, more specifically to a kind of realization cable fault intelligence The ring main unit that can be cut soon.
Background technology
Ring main unit is one group of transmission & distribution electrical equipment (high-tension switch gear) in metal or non-metallic insulation cabinet or does At the electrical equipment of assembled compartment ring network power supplying units, core uses on-load switch and fuse, supply main The annular of a closure is formed, power supply is powered to this ring main, pressed off all the way by height again from main line Outside distribution is closed, each distribution branch can not only take power supply from the left side main line of looped network, but also can be taken from main line on the right side of looped network Power supply, when left side, main line is out of order, and just from right side, main line continues to be powered looped network, and when right side main line is out of order, ring Just from left side, main line continues to be powered net, although general supply is single service, two-way is obtained from each distribution branch The reliability of power supply, power supply is high, therefore it is widely used in Urban Residential District, skyscraper, large public building, factory In the power distribution station and box-type substation of the load centers such as enterprise.
Urban power distribution network powers as a result of small-sized ring main unit, efficiently solves that substation's transmission line corridor is limited to ask Topic, keeps supply network more flexible, and more power supply points knob is more readily formed mutually for mode, improve power supply reliability and Flexibility, but also make the method for operation of power distribution network more complicated simultaneously, if realizing power supply without effective monitoring system Real time monitoring does not often grasp actual operation conditions in the power grids such as load is uneven, and mode is unreasonable, makes ring network power supply Advantage has no way of playing.In addition, the operating status of the equipment such as ring main unit, can only be realized also or by manual inspection, some ratios More hidden installation and operation hidden danger, may not necessarily find in time.From the ring main unit of urban power distribution network and small switch operation it is real From the point of view of example, many areas all occurred, since end installation is not in place, to lead to conductor joint heating, so that developing to end burning It ruins and causes to be grounded, be eventually developed to the accident of short trouble, cause large range of power failure.Therefore, from raising power distribution network power supply Reliability for improving distribution operation and management level, realizes the monitoring of ring main unit automatic intelligent, there is very important meaning, and And it is an important link for building intelligent grid.In the process of construction of intelligent grid, the electric current of high-tension line is measured in real time Intelligentized key is realized with voltage, therefore is increased inside ring main unit and be configured with Intelligent protection measuring controller, intelligence sensor, Such as publication date is entitled disclosed in 23 days July in 2013《The application of all-insulated ring network cabinet cable current and temperature monitoring is ground Study carefully》Periodical literature, reach every route to ring main unit, every outlet, ring main unit itself are monitored on-line, failure is quick Novel looped network cabinet for the purpose of excision.
Through retrieval, Chinese patent CN201110199569.1 discloses a kind of compact intelligent ring main unit, including looped network Cabinet ontology, ring main unit ontology include at least at least one incoming line cabinet and at least one outgoing line cabinet;Electronic current voltage mutual inductor, It is set in each incoming line cabinet to acquire the voltage and current signals of inlet wire;Electronic current mutual inductor is installed on each To acquire the current signal of outlet in outgoing line cabinet;For another example Chinese patent CN201210431647.0 discloses a kind of intelligent complete exhausted The totally-enclosed inflatable ring main unit of edge, is mainly made of major loop and intelligent control circuit, wherein:Voltage transformer is connected in parallel on In major loop, current transformer is set on main bus-bar;For another example Chinese patent CN201520690576.5 discloses one kind and has The intelligent vacuum circuit breaker ring main unit of communication function, including cabinet, cabinet lower part are equipped with cable vault, and it is mutual that cable vault is equipped with electric current Sensor.
Several ring main units disclosed above are to be unfolded based on existing current signal acquisition technique, and these technologies are big Rest on theory stage, and in actual use, the through-hole of current transformer or current-voltage transformer is downward and extremely more Few two transverse directions are sequentially arranged in cabinet, since the primary voltage of ring main unit is generally very high or even volt up to ten thousand, inlet wire cable Core sectional area is more than 300mm2, and the core of inlet wire cable is formed by copper alloy, and core is hard and uneasy bending, adds Ring main unit lower height be 600mm, space is more narrow, and the core of cable passes through vertically disposed current transformer or electric current Voltage transformer installation is very difficult, time-consuming and laborious, even if after installation, cable core replacement is not easy to take out, actual installation When, operator directly takes away current transformer, and looped network cabinet intelligent is caused to perform practically no function, and cannot achieve the intelligence of failure at all Energyization controls, and then influences the intelligent of ring main unit and use.
Invention content
1. to solve the problems, such as
It passes through current transformer or current-voltage transformer installation time-consuming and laborious for the core of existing cable, is unfavorable for ring Intelligent the problem of using of net cabinet, the utility model provides a kind of ring main unit realized cable fault and intelligently cut soon, by excellent The internal structure for changing ring main unit accesses convenient for the installation of inlet wire cable, improves working efficiency, realize the intelligentized control method of failure, It is promoted the use of conducive to the intelligence of ring main unit.
2. technical solution
To solve the above-mentioned problems, technical solution used by the utility model is as follows:
The ring main unit that the realization cable fault of the utility model is intelligently cut soon, includes the plug-in bottom for being socketed plugging member Inlet wire cable is introduced ring network cabinet body by seat;Current transformer, level is set on the plug-in pedestal, for acquiring Current signal.
In a kind of possible embodiment of the utility model, the plug-in pedestal include base body, conductive column and There is conical nose and step-like middle part, head and middle part to be integrated construction for fixing bolt, base body, and base body is along center Offer through-hole;Conductive column is fixed in through-hole and without departing from through-hole, and conductive post head is equipped with threaded hole, and fixing bolt is passed through and connect Line nose coordinates with threaded hole.
In a kind of possible embodiment of the utility model, the current transformer includes shell, iron core, coil and connects Line terminals, iron core are made using ultracrystallite or high magnetic conduction silicon steel sheet, enameled wire uniformly around constituting coil on iron core, by Two connecting terminals are drawn on shell, connecting terminal is connect with coil, and heat conductive silica gel is filled between middle casing and iron core.
In a kind of possible embodiment of the utility model, the current transformer is arranged and is fixed on plug-in pedestal Middle part, the coil of current transformer and the spacing of conductive column are 10-20mm.
In a kind of possible embodiment of the utility model, the current transformer is Combined type current transformer, electricity The thickness of shell of current transformer is consistent with the thickness of cabinet.
In a kind of possible embodiment of the utility model, it is provided with around iron core in the outside both ends of the surface of the shell The strip or dot bulge of involute-type trend, the strip or dot bulge quantity of involute-type trend are at least two.
In a kind of possible embodiment of the utility model, the height of the protrusion is 2-4mm.
In a kind of possible embodiment of the utility model, the involute is circle involute or parabola involute.
The manufacturing method for the ring main unit that the realization cable fault of the utility model is intelligently cut soon, according to the following steps specifically into Row:
Step S101, plug-in pedestal is made, there is conical nose and step-like middle part using ceramic insulating material molding Base body, and conductive column is placed in the through-hole of base body, wherein the base body thickness at middle part is 10-20mm;
Step S102, make current transformer, using epoxy resin plus silica moulding by casting shell, epoxy resin with The weight ratio of silica is 1: (0.02-0.05), the thickness of shell are 3-5mm, and when cast, temperature control is at 60-90 DEG C, shell The outside both ends of the surface of body form the protrusion that height is 2-4mm, routinely make iron core using ultracrystallite or high magnetic conduction silicon steel sheet, will gather Ester imines/polyamide composite enameled wire is subsequently placed in around being located on iron core in shell, and thermal conductive silicon is filled between shell and iron core Glue, heat conductive silica gel filling are closely knit;
Step S103, the mounting hole of current transformer is reserved on ring network cabinet body, mounting hole is dimensioned slightly smaller than electric current Current transformer is first sleeved on the middle part of plug-in pedestal by the appearance and size of mutual inductor, and then current transformer tightly engages In the mounting hole of cabinet.
In the step S102, after shell moulding by casting, shell is cooled down according to rate for 0.5-1 DEG C/min, until The temperature of shell is down to room temperature.
3. advantageous effect
Compared with the prior art, the beneficial effects of the utility model are:
(1) ring main unit that the realization cable fault of the utility model is intelligently cut soon, by the through-hole court of existing current transformer The lower and at least two lateral frame modes being sequentially arranged in cabinet, carry out reasonably optimizing so that the through-hole of current transformer Horizontally toward, it and is sleeved on plug-in pedestal, the current signal on conductive column is acquired by current transformer, change existed in the past The way of electricity, one side plug-in pedestal is taken to be made by ceramic insulating material on inlet wire cable, the magnetic field intensity of coil and iron core Limited, therefore, it is necessary to be improved to board plug type pedestal;Another aspect coil will produce heat when working with iron core, existing Technology in, current transformer is placed in the lower space of cabinet, and heat dissipation effect is preferable, and the current transformer of the utility model is solid Determine on the cabinet, ventilation effect is poor so that the accumulation of heat of coil and iron core is easy to cause coil or iron core overheat, causes line Circle damage, therefore the heat dissipation problem of current transformer is solved, the inlet wire cable of the utility model ring main unit is without folding Curved, inlet wire cable is introduced into ring main unit and is easy, and improves work efficiency, when inlet wire cable needs replacing, cable core takes Go out also easily, electricity can be taken by current transformer, realize the intelligentized control method to ring main unit;
(2) ring main unit that the realization cable fault of the utility model is intelligently cut soon, plug-in pedestal have conical nose With step-like middle part, head and middle part are integrated construction, such structure so that current transformer may be mounted at it is step-like in Portion ensure that the insulation distance between coil or iron core and conductive column in 10-20mm, is conducive to current transformer and takes electricity, take electricity Numerical value is more accurate, and the loss late of electric current is more accurate to the control of ring main unit 0.5% or so;
(3) ring main unit that the realization cable fault of the utility model is intelligently cut soon, by ultracrystallite or high magnetic conduction silicon steel sheet system Iron core made of work, magnetic conductivity is high, can be effectively reduced the generation of heat, and heat conductive silica gel can transfer heat to shell, Internal heat is further distributed by shell, it is especially short-circuit, avoid coil or iron core from overheating and burn out;
(4) ring main unit that the realization cable fault of the utility model is intelligently cut soon, it is convex in the outside both ends of the surface setting of shell It rising, protrusion is in strip or dotted, and protrusion is centered around around iron core, these boss can increase the heat dissipation area of shell, The heat dissipation performance for improving shell, further speeds up enclosure interior radiating rate;
(5) ring main unit that the realization cable fault of the utility model is intelligently cut soon is simple in structure, and reasonable design is easy to make It makes;
(6) manufacturing method for the ring main unit that the realization cable fault of the utility model is intelligently cut soon, middle casing is by epoxy Resin adds silica moulding by casting, epoxy resin and silica to coordinate by certain ratio, and silica not only enhances The intensity of shell, while under magnetic fields, silica has good anti-eddy current effect, avoids epoxy resin too fast old Change;
(7) manufacturing method for the ring main unit that the realization cable fault of the utility model is intelligently cut soon, hull outside both ends of the surface Involute-type protrusion, be molded to obtain by epoxy resin plus silica, convex surfaces are smooth, and it is existing that condensation is not susceptible in protrusion As;
(8) manufacturing method for the ring main unit that the realization cable fault of the utility model is intelligently cut soon, shell are according to rate 0.5-1 DEG C/min cools down, and epoxy resin is tightly combined with silica, will not crack, while under the cooling rate, Surface of shell is smooth, and surface of shell is not easy to assemble steam, ensures that the heat dissipation of shell is smooth.
Description of the drawings
The technical solution of the utility model is described in further detail below with reference to drawings and examples, still It should be known that these attached drawings only design for task of explanation, therefore not as the restriction of the scope of the utility model.In addition, Unless otherwise indicated, these attached drawings are meant only to conceptually illustrate structure construction described herein, without to carry out to scale It draws.
Fig. 1 is the structural schematic diagram for the ring main unit that the utility model realizes that cable fault is intelligently cut soon;
Fig. 2 is the mounting structure schematic diagram of the utility model current transformer and plug-in pedestal;
Fig. 3 is a kind of structural schematic diagram of shell of the utility model current transformer;
Fig. 4 is the shell another kind structural schematic diagram of the utility model current transformer.
In figure:1, plug-in pedestal;110, base body;111, conical nose;112, step-like middle part;113, through-hole; 120, conductive column;130, fixing bolt;140, Wiring nose;
2, current transformer;210, shell;211, raised;220, iron core;230, coil;240, connecting terminal;
3, heat conductive silica gel;
4, cabinet;
5, inlet wire cable;
6, plugging member.
Specific implementation mode
Hereafter to the detailed description of the exemplary embodiment of the utility model with reference to attached drawing, which forms the one of description Part has been shown as example the enforceable exemplary embodiment of the utility model in the figure.Although these exemplary realities Example is applied to be described in sufficient detail so that those skilled in the art can implement the utility model, it is to be understood that it can be realized His embodiment and can various changes can be made to the utility model in the case where not departing from the spirit and scope of the utility model.Hereafter Required the scope of the utility model is not limited to the more detailed description of the embodiments of the present invention, and only The description of the characteristics of in order to be illustrated and not limit to the utility model and feature, to propose to execute the utility model Best mode, and it is sufficient to make those skilled in the art that can implement the utility model.Therefore, the scope of the utility model only by Appended claims limit.
Hereafter the detailed description of the utility model and example embodiment are more fully understood in combination with attached drawing, wherein this reality It is identified by reference numeral with novel element and feature.
Embodiment 1
As shown in Figures 1 to 4, the ring main unit that the realization cable fault of the present embodiment is intelligently cut soon, including be used to cover and patch Inlet wire cable 5 is introduced ring network cabinet body 4 by the plug-in pedestal 1 for pulling out part 6;Current transformer 2, level is set in plug-in On pedestal 1, for acquiring current signal.
Wherein, in fig. 2, plug-in pedestal 1 includes base body 110, conductive column 120 and fixing bolt 130, pedestal sheet Body 110 has conical nose 111 and step-like middle part 112, and head and step-like middle part 112 are integrated construction, base body 110 offer through-hole 113 along center;Conductive column 120 is fixed in through-hole 113 and without departing from through-hole 113,120 head of conductive column Equipped with threaded hole, fixing bolt 130 passes through Wiring nose 140 to coordinate with threaded hole, and Wiring nose 140 is connect with inlet wire cable 5, and by Plugging member 6 covers.
Wherein, in fig. 2, current transformer 2 includes shell 210, iron core 220, coil 230 and connecting terminal 240, iron core 220 are made using ultracrystallite or high magnetic conduction silicon steel sheet, and enameled wire on iron core 220 uniformly around coil 230 is constituted, by shell Two connecting terminals 240 are drawn on body 210, connecting terminal 240 is connect with coil 230.
The through-hole 113 of the present embodiment current transformer 2 horizontally toward, and is sleeved on plug-in pedestal 1, mutual by electric current Sensor 2 acquires the current signal on conductive column 120, changes the way for taking electricity on inlet wire cable 5 in the past, one side plug-in bottom Seat 1 is made by ceramic insulating material, and coil 230 and the magnetic field intensity of iron core 220 are limited, therefore, it is necessary to board plug type pedestal into Row improves, and current transformer 2 is arranged and is fixed on the step-like middle part 112 of plug-in pedestal 1, the coil 230 of current transformer 2 Spacing with conductive column 120 is 10-20mm;Another aspect coil 230 will produce heat when working with iron core 220, existing In technology, current transformer 2 is placed in the lower space of cabinet 4, and heat dissipation effect is preferable, and the current transformer 2 of the present embodiment is solid It is scheduled on cabinet 4, ventilation effect is poor so that the accumulation of heat of coil 230 and iron core 220 is easy to cause coil 230 or iron core 220 overheats, cause coil 230 to damage, therefore the heat dissipation problem of current transformer 2 is solved, middle casing 210 and iron Heat conductive silica gel 3 is filled between core 220, shell 210 adds silica moulding by casting using epoxy resin.
Convenient and efficient for installation, current transformer is Combined type current transformer, the shell 210 of current transformer 2 Thickness is consistent with the thickness of cabinet 4, and 2 device of such current transformer is flushed with cabinet 4, more aesthetically pleasing.
As shown in Figure 3 and Figure 4, the length of involute-type trend is provided in the outside both ends of the surface of shell 210 around iron core 220 Strip or dot bulge 211, the strip or 211 quantity of dot bulge of involute-type trend are four, and the height of protrusion 211 is 2- 4 mm, best 211 height of protrusion are 3mm, and involute is circle involute or parabola involute.
In use, inlet wire cable 5 is introduced into ring main unit, it is 10 kilovolts, electric current 1000A to introduce voltage, in cabinet 4 Interior, when current transformer 2 normally takes electricity, coil 230 and iron core 220 will produce heat, these heats are passed by heat conductive silica gel 3 Shell 210 is passed, good compared with air heat-transfer effect, then the protrusion 211 on 210 surface of shell can radiate well, with smooth surface shell Body 210 is compared, and the temperature of the current transformer 2 of the utility model is less than existing or smooth surface shell 210 current transformer 2.High-tension current is reduced to low-tension current by current transformer 2, and low-tension current is input to controller, is set by the program of controller It sets, analyzes the electric current of ring main unit circuit, cable fault may be implemented and intelligently cut soon, such as short circuit etc., be conducive to the intelligence of ring main unit Energyization uses.
Embodiment 2
The manufacturing method for the ring main unit that the realization cable fault of the present embodiment is intelligently cut soon, according to the following steps specifically into Row:
Step S101, plug-in pedestal 1 is made, using ceramic insulating material molding with conical nose 111 and step-like The base body 110 at middle part 112, and conductive column 120 is placed in the through-hole 113 of base body 110, wherein step-like middle part 112 110 thickness of base body is 20mm;
Step S102, current transformer 2 is made, using epoxy resin plus silica moulding by casting shell 210, asphalt mixtures modified by epoxy resin The weight ratio of fat and silica is 1: 0.05, and the thickness of shell 210 is 5mm, and when cast, temperature control is at 60 DEG C, shell 210 outside both ends of the surface form height as the protrusion 211 of 4mm, after 210 moulding by casting of shell, are according to rate by shell 210 0.5 DEG C/min cools down, until the temperature of shell 210 is down to room temperature;
Iron core 220 is routinely made using ultracrystallite or high magnetic conduction silicon steel sheet, by polyester-imide/polyamide composite enameled wire around It is located on iron core 220, is subsequently placed in shell 210, heat conductive silica gel 3, heat conductive silica gel 3 are filled between shell 210 and iron core 220 It fills closely knit;
Step S103, the mounting hole of current transformer 2 is reserved on ring network cabinet body 4, mounting hole is dimensioned slightly smaller than electricity Current transformer 2 is first sleeved on the step-like middle part 112 of plug-in pedestal 1, then electric current by the appearance and size of current transformer 2 Mutual inductor 2 is tightly fastened in the mounting hole of cabinet 4.
Embodiment 3
The manufacturing method for the ring main unit that the realization cable fault of the utility model is intelligently cut soon, according to the following steps specifically into Row:
Step S101, plug-in pedestal 1 is made, using ceramic insulating material molding with conical nose 111 and step-like The base body 110 at middle part 112, and conductive column 120 is placed in the through-hole 113 of base body 110, wherein step-like middle part 112 110 thickness of base body is 10mm;
Step S102, current transformer 2 is made, using epoxy resin plus silica moulding by casting shell 210, asphalt mixtures modified by epoxy resin The weight ratio of fat and silica is 1: 0.05, and the thickness of shell 210 is 3mm, and when cast, temperature control is at 70 DEG C, shell 210 outside both ends of the surface form the protrusion 211 that height is 3mm, according to rate are 1 by shell 210 after 210 moulding by casting of shell DEG C/min coolings, until the temperature of shell 210 is down to room temperature;
Iron core 220 is routinely made using ultracrystallite or high magnetic conduction silicon steel sheet, by polyester-imide/polyamide composite enameled wire around It is located on iron core 220, is subsequently placed in shell 210, heat conductive silica gel 3, heat conductive silica gel 3 are filled between shell 210 and iron core 220 It fills closely knit;
Step S103, the mounting hole of current transformer 2 is reserved on ring network cabinet body 4, mounting hole is dimensioned slightly smaller than electricity Current transformer 2 is first sleeved on the step-like middle part 112 of plug-in pedestal 1, then electric current by the appearance and size of current transformer 2 Mutual inductor 2 is tightly fastened in the mounting hole of cabinet 4.
Embodiment 4
The manufacturing method for the ring main unit that the realization cable fault of the utility model is intelligently cut soon, according to the following steps specifically into Row:
Step S101, plug-in pedestal 1 is made, using ceramic insulating material molding with conical nose 111 and step-like The base body 110 at middle part 112, and conductive column 120 is placed in the through-hole 113 of base body 110, wherein step-like middle part 112 110 thickness of base body is 15mm;
Step S102, current transformer 2 is made, using epoxy resin plus silica moulding by casting shell 210, asphalt mixtures modified by epoxy resin The weight ratio of fat and silica is 1: 0.04, and the thickness of shell 210 is 4mm, and when cast, temperature control is at 65 DEG C, shell 210 outside both ends of the surface form height as the protrusion 211 of 2mm, after 210 moulding by casting of shell, are according to rate by shell 210 0.8 DEG C/min cools down, until the temperature of shell 210 is down to room temperature;
Iron core 220 is routinely made using ultracrystallite or high magnetic conduction silicon steel sheet, by polyester-imide/polyamide composite enameled wire around It is located on iron core 220, is subsequently placed in shell 210, heat conductive silica gel 3, heat conductive silica gel 3 are filled between shell 210 and iron core 220 It fills closely knit;The enameled wire thermal shock resistance of the type is good, and resistance to cut through temperature is high, and mechanical strength is excellent, solvent resistant and Refrigerantresisting property can preferably;
Step S103, the mounting hole of current transformer 2 is reserved on ring network cabinet body 4, mounting hole is dimensioned slightly smaller than electricity Current transformer 2 is first sleeved on the step-like middle part 112 of plug-in pedestal 1, then electric current by the appearance and size of current transformer 2 Mutual inductor 2 is tightly fastened in the mounting hole of cabinet 4.

Claims (8)

1. a kind of ring main unit realized cable fault and intelligently cut soon, which is characterized in that include the plug-in for being socketed plugging member Pedestal(1), inlet wire cable is introduced into ring network cabinet body(4);Current transformer(2), level is set in the plug-in pedestal (1)On, for acquiring current signal.
2. the ring main unit according to claim 1 realized cable fault and intelligently cut soon, which is characterized in that the plug-in bottom Seat(1)Including base body(110), conductive column(120)And fixing bolt(130), base body(110)With conical nose (111)With step-like middle part(112), head and step-like middle part(112)It is integrated construction, base body(110)It is opened along center Equipped with through-hole(113);Conductive column(120)It is fixed on through-hole(113)It is interior and without departing from through-hole(113), conductive column(120)Head is set There are threaded hole, fixing bolt(130)Across Wiring nose(140)Coordinate with threaded hole.
3. the ring main unit according to claim 2 realized cable fault and intelligently cut soon, which is characterized in that the Current Mutual Inductance Device(2)Including shell(210), iron core(220), coil(230)And connecting terminal(240), iron core(220)Using ultracrystallite or height Magnetic conduction silicon steel sheet is made, and enameled wire is uniformly around in iron core(220)Upper composition coil(230), by shell(210)Upper extraction Two connecting terminals(240), connecting terminal(240)With coil(230)Connection, middle casing(210)With iron core(220)Between fill out Filled with heat conductive silica gel(3).
4. the ring main unit according to claim 3 realized cable fault and intelligently cut soon, which is characterized in that the Current Mutual Inductance Device(2)It is arranged and is fixed on plug-in pedestal(1)Step-like middle part(112), current transformer(2)Coil(230)With lead Electric column(120)Spacing be 10-20 mm.
5. the ring main unit according to claim 3 realized cable fault and intelligently cut soon, which is characterized in that the Current Mutual Inductance Device is Combined type current transformer, current transformer(2)Shell(210)Thickness is consistent with the thickness of cabinet.
6. the ring main unit according to claim 4 realized cable fault and intelligently cut soon, which is characterized in that the shell (210)Outside both ends of the surface on surround iron core(220)It is provided with the strip or dot bulge of involute-type trend(211), gradually The strip or dot bulge of the type that bursts at the seams trend(211)Quantity is at least two.
7. the ring main unit according to claim 6 realized cable fault and intelligently cut soon, which is characterized in that the protrusion (211)Height be 2-4 mm.
8. according to claim 6 realize the cable fault intelligently ring main unit cut soon, which is characterized in that the involute is Circle involute or parabola involute.
CN201721636129.7U 2017-11-30 2017-11-30 A kind of ring main unit realized cable fault and intelligently cut soon Active CN207743615U (en)

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Application Number Priority Date Filing Date Title
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