CN209374279U - A kind of discharge resistance external three-phase low-voltage capacitor cover board - Google Patents
A kind of discharge resistance external three-phase low-voltage capacitor cover board Download PDFInfo
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- CN209374279U CN209374279U CN201920063157.7U CN201920063157U CN209374279U CN 209374279 U CN209374279 U CN 209374279U CN 201920063157 U CN201920063157 U CN 201920063157U CN 209374279 U CN209374279 U CN 209374279U
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- discharge resistance
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- cover board
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Abstract
The utility model relates to a kind of discharge resistance external three-phase low-voltage capacitor cover boards, including cover board body, three connecting terminals, three discharge resistances, insulating base is embedded in the middle part of cover board body, insulating base includes the bottom plate of rounded setting, the boss of triangular shape is provided with above bottom plate, the center of boss is provided with cylindrical bump, is also set up above boss there are three convex ribs, the top of convex ribs is provided with card slot compatible with discharge resistance.After the discharge resistance external three-phase low-voltage capacitor cover board and capacitor case are completed, the amount of heat that three discharge resistances generate in the process of running directs out boundary and distributes, the service life of capacitor extends, while not influencing the electric discharge work of capacitor.Three installations between discharge resistance and insulating base are simple and convenient, and implementation result is good.
Description
Technical field
The utility model relates to a kind of discharge resistance external three-phase low-voltage capacitor cover boards, belong to capacitor technology neck
Domain.
Background technique
Secondary capacitor is often referred to power capacitor of the voltage rating between 400V ~ 1kV.Secondary capacitor effect is to change
Kind power factor (PF) can reduce the load of equipment to reduce electricity cost, increase its service life, reduce feeder ear to use
Line loss between electric end.
At present in three-phase low-voltage capacitor, in the discharge resistance that is internally provided with of capacitor case, the discharge resistance
Three are usually provided with, the discharge resistance is exactly the resistance for discharging, and the discharge resistance is usually and capacitor is in parallel；?
When power-supply fluctuation, capacitor can charge and discharge therewith；Such as not parallel discharge resistance, charging and discharging currents are from capacitor one end through work
The other end of capacitor, the work of severe jamming circuit stability are returned to as circuit.Parallel discharge resistance, charging and discharging currents are from resistance stream
It crosses, can avoid above-mentioned drawback.Due to being all that discharge resistance is built in electricity currently, avoid discharge resistance from damaging from whole consideration
The inside of shell of tank is fixedly mounted on the lower section of capacitor cover plate；Triangle can be used between discharge resistance and connecting terminal
Connection, i.e., one end of first discharge resistance are electrically connected with first connecting terminal, the other end of first discharge resistance with
The electrical connection of third connecting terminal, one end of second discharge resistance are electrically connected with first connecting terminal, second electric discharge electricity
The other end of resistance is electrically connected with second connecting terminal, and one end of third discharge resistance is electrically connected with second connecting terminal,
The other end of third discharge resistance is electrically connected with third connecting terminal.
But three-phase low-voltage capacitor is in use, capacitor core group can generate heat；It adds, discharge resistance
Resistance value it is larger, discharge resistance can also generate a large amount of heat in the process of running, and will increase capacitor built in discharge resistance
The internal temperature rise of device leads to the capacitor core group accelerated ageing of capacitor internal, capacitor operation meeting in the environment of excess temperature for a long time
The service life of capacitor, the low then capacitor long service life of temperature rise are influenced, it is short that temperature increases then capacitor service life.Also,
The temperature of capacitor internal is higher, and the resistance value of guiding discharge resistance can increase, the resistance value of discharge resistance with the raising of temperature
Variation will affect capacitor discharge time and design value mismatch, to influence the normal work of capacitor.
Utility model content
The utility model is in view of the deficienciess of the prior art, provide a kind of discharge resistance external three-phase low-voltage capacitor
Device cover board, specific technical solution are as follows:
A kind of discharge resistance external three-phase low-voltage capacitor cover board, including cover board body, three connecting terminals, three
Discharge resistance, is embedded with insulating base in the middle part of cover board body, and connecting terminal includes cylindric conductive segment, is connected as with conductive segment
The outer cover of the conductive stud section of one, conductive stud section is equipped with conductive nut, and conductive nut is threadedly coupled with conductive stud section；
Insulating base includes the bottom plate of rounded setting, and the boss of triangular shape is provided with above bottom plate, is provided at the interior angle of boss
Through the through-hole of boss and bottom plate, the top of boss is arranged in conductive stud section, and the lower end of conductive segment passes through through-hole and conductive segment
Side wall and through-hole hole wall be tightly connected, the conduction covered outside conductive stud section is provided between conductive nut and conductive segment
Washer；The center of boss is provided with cylindrical bump, is also set up above boss there are three convex ribs, three convex ribs are symmetrically distributed in
The periphery of protrusion；The top of convex ribs is provided with card slot compatible with discharge resistance.
As an improvement of the above technical solution, three discharge resistances are arranged at the top of boss, first discharge resistance
One end be electrically connected with first conductive gasket, the other end of first discharge resistance is electrically connected with third conductive gasket,
One end of two discharge resistances is electrically connected with first conductive gasket, the other end and second conductive pad of second discharge resistance
Circle electrical connection, one end of third discharge resistance is electrically connected with second conductive gasket, the other end of third discharge resistance and
The electrical connection of third conductive gasket.
As an improvement of the above technical solution, the sharp corner of the boss is provided with arc transition, the outside the boss
Arc groove is provided in the middle part of side.
As an improvement of the above technical solution, one end of the convex ribs extend to protrusion outside, the convex ribs it is another
End extends to the slot bottom of arc groove.
As an improvement of the above technical solution, the central axes of the conductive segment are conllinear with the central axes of conductive stud section, institute
The outer diameter for stating conductive segment is greater than the maximum outside diameter of conductive stud section.
The utility model has the beneficial effects that
After the discharge resistance external three-phase low-voltage capacitor cover board and capacitor case are completed, three are put
The amount of heat that resistance generates in the process of running directs out boundary and distributes, and will not aggravate the temperature rise inside capacitor case,
, it is avoided that capacitor core group accelerated ageing inside capacitor case, the service life of capacitor extends, while not influencing electricity for this
The electric discharge work of container.Three installations between discharge resistance and insulating base are simple and convenient, and implementation result is good.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of discharge resistance external three-phase low-voltage capacitor cover board described in the utility model；
Fig. 2 is the structural schematic diagram of connecting terminal described in the utility model；
Fig. 3 is the connection schematic diagram of cover board body described in the utility model and insulating base；
Fig. 4 is the structural schematic diagram of insulating base described in the utility model；
Fig. 5 is the connection schematic diagram of discharge resistance described in the utility model and conductive gasket.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
As shown in Fig. 1 ~ 4, the discharge resistance external three-phase low-voltage capacitor cover board, including cover board body 20, three
30, three discharge resistances 40 of a connecting terminal, the middle part of cover board body 20 are embedded with insulating base 50, and connecting terminal 30 includes circle
Post-like conductive section 301, the conductive stud section 302 being connected as one with conductive segment 301, the outer cover of conductive stud section 302 are equipped with
Conductive nut 60, conductive nut 60 are threadedly coupled with conductive stud section 302；Insulating base 50 includes the bottom plate of rounded setting
51, the top of bottom plate 51 is provided with the boss 52 of equilateral triangle shape, is provided at the interior angle of boss 52 through boss 52 and bottom
Plate 51 and the through-hole 53 to match with conductive segment 301, conductive stud section 302 are arranged in the top of boss 52, under conductive segment 301
It holds and is tightly connected across the hole wall of the side wall of through-hole 53 and conductive segment 301 and through-hole 53, between conductive nut 60 and conductive segment 301
It is provided with the conductive gasket 10 covered outside conductive stud section 302；The center of boss 52 is provided with cylindrical bump 54, boss 52
Top also set up there are three convex ribs 55, three convex ribs 55 are symmetrically distributed in the periphery of protrusion 54；The top of convex ribs 55 is provided with
Card slot 551 compatible with discharge resistance 40.
Wherein, it is electrically connected by conducting wire using soldering between discharge resistance 40 and conductive gasket 10, conductive gasket 10 connects
Line terminals 30 and conductive nut 60 are all made of copper or aluminium is made；Due to the central axes of the conductive segment 301 and conductive stud section
302 central axes are conllinear, and the outer diameter of the conductive segment 301 is greater than the maximum outside diameter of conductive stud section 302, this makes conductive nut
60 be threadedly coupled with conductive stud section 302 after conductive nut 60 conductive gasket 10 and conductive segment 301 can be pushed against, to complete
Electrical connection between conductive gasket 10 and connecting terminal 30 is also equivalent between discharge resistance 40 and corresponding connecting terminal 30
Electrical connection.
Three discharge resistances 40 are arranged at the top of boss 52, three discharge resistances 40 and corresponding conductive gasket 10 it
Between electric connection mode as shown in figure 5, one end of first discharge resistance 40 is electrically connected with first conductive gasket 10, first
The other end of discharge resistance 40 is electrically connected with third conductive gasket 10, one end of second discharge resistance 40 and first conduction
Washer 10 is electrically connected, and the other end of second discharge resistance 40 is electrically connected with second conductive gasket 10, third discharge resistance
40 one end is electrically connected with second conductive gasket 10,10 electricity of the other end and third conductive gasket of third discharge resistance 40
Connection.
After the discharge resistance external three-phase low-voltage capacitor cover board and capacitor case are completed, three are put
Resistance 40 is arranged at the outside of capacitor case, and three discharge resistances 40 are located at the top of insulating base 50, this to put
The amount of heat that resistance 40 generates in the process of running directs out boundary and distributes, and will not aggravate the temperature inside capacitor case
It rises, this is it is avoided that capacitor core group accelerated ageing inside capacitor case, the service life of capacitor extend.Also, it discharges
Resistance 40 is external, so that the heat inside capacitor case can not influence discharge resistance, the change in resistance of discharge resistance is little, no
Influence the electric discharge work of capacitor.
The discharge resistance 40 can be placed on corresponding card slot 551, so that the length direction of discharge resistance 40 and convex ribs 55
Length direction be mutually perpendicular to, under the positioning of card slot 551, position-limiting action, facilitate installation, meanwhile, glue, which also can be used, to be put
Resistance 40 is fixed at corresponding card slot 551；Above-mentioned mounting means is conducive to discharge resistance so that discharge resistance 40 is exposed
40 heat dissipations.
The presence of boss 52, also has the function of reinforcement block, so that insulating base 50 plays the role of explosion-proof block.Due to depositing
In wedge angle, this makes the wedge angle of boss 52 easy to wear and causes layout area excessive；Further, the sharp corner of the boss 52
It is provided with arc transition 521, is provided with arc groove 522 in the middle part of 52 outer side edges of boss.At the arc transition 521
It is not susceptible to wear.The arc groove 522 is the groove that cross section is arc, and hand is pinched or held when design facilitates installation in this way；
Meanwhile if subsequent design match with boss 52 box cover when, the boss 52 of the structure is easily plugged together with box cover.
Further, one end of the convex ribs 55 extends to the outside of protrusion 54, and the other end of the convex ribs 55 extends to
The slot bottom of arc groove 522.Effect of three 55 one side of convex ribs as reinforcing rib, on the other hand, the presence of convex ribs 55 is to set
It sets card slot 551 and carrier is provided.The convex ribs 55, protrusion 54 and boss 52 are integrally formed.
In the above-described embodiments, when the discharge resistance external three-phase low-voltage capacitor cover board and capacitor case group
After the completion of dress, three discharge resistances 40 are arranged at the outside of capacitor case, so that discharge resistance 40 produces in the process of running
Raw amount of heat directs out boundary and distributes, and will not aggravate the temperature rise inside capacitor case, this is it is avoided that in capacitor case
The service life of the capacitor core group accelerated ageing in portion, capacitor extends.Also, discharge resistance 40 is external, so that outside capacitor
Heat inside shell can not influence discharge resistance 40, and the change in resistance of discharge resistance 40 is little, not influence the electric discharge work of capacitor
Make.Installation between three discharge resistances 40 and insulating base 50 is simple and convenient.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (5)
1. a kind of discharge resistance external three-phase low-voltage capacitor cover board, including cover board body (20), three connecting terminals
(30), three discharge resistances (40) are embedded with insulating base (50) in the middle part of cover board body (20), and connecting terminal (30) includes circle
Post-like conductive section (301), the conductive stud section (302) being connected as one with conductive segment (301), conductive stud section (302) it is outer
Portion is arranged with conductive nut (60), and conductive nut (60) is threadedly coupled with conductive stud section (302), it is characterised in that: insulation base
Seat (50) includes the bottom plate (51) of rounded setting, and the boss (52) of triangular shape, boss (52) are provided with above bottom plate (51)
Interior angle at be provided with through-hole (53) through boss (52) and bottom plate (51), conductive stud section (302) is arranged in boss (52)
Top, the lower end of conductive segment (301) passes through the side wall of through-hole (53) and conductive segment (301) and the hole wall of through-hole (53) seals and connects
It connects, is provided between conductive nut (60) and conductive segment (301) and covers the conductive gasket (10) external in conductive stud section (302)；
The center of boss (52) is provided with cylindrical bump (54), is also set up above boss (52) there are three convex ribs (55), three convex
Muscle (55) is symmetrically distributed in the periphery of raised (54)；The top of convex ribs (55) is provided with and discharge resistance (40) compatible card slot
(551).
2. a kind of discharge resistance external three-phase low-voltage capacitor cover board according to claim 1, it is characterised in that: three
A discharge resistance (40) is arranged at the top of boss (52), one end of first discharge resistance (40) and first conductive gasket
(10) it is electrically connected, the other end of first discharge resistance (40) is electrically connected with third conductive gasket (10), second electric discharge electricity
One end of resistance (40) is electrically connected with first conductive gasket (10), the other end and second conduction of second discharge resistance (40)
Washer (10) electrical connection, one end of third discharge resistance (40) are electrically connected with second conductive gasket (10), third electric discharge
The other end of resistance (40) is electrically connected with third conductive gasket (10).
3. a kind of discharge resistance external three-phase low-voltage capacitor cover board according to claim 1, it is characterised in that: institute
The sharp corner for stating boss (52) is provided with arc transition (521), is provided with arc groove in the middle part of boss (52) outer side edges
(522).
4. a kind of discharge resistance external three-phase low-voltage capacitor cover board according to claim 3, it is characterised in that: institute
The one end for stating convex ribs (55) extends to the outside of raised (54), and the other end of the convex ribs (55) extends to arc groove (522)
Slot bottom.
5. a kind of discharge resistance external three-phase low-voltage capacitor cover board according to claim 1, it is characterised in that: institute
The central axes for stating conductive segment (301) are conllinear with the central axes of conductive stud section (302), and the outer diameter of the conductive segment (301) is greater than
The maximum outside diameter of conductive stud section (302).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920063157.7U CN209374279U (en) | 2019-01-15 | 2019-01-15 | A kind of discharge resistance external three-phase low-voltage capacitor cover board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920063157.7U CN209374279U (en) | 2019-01-15 | 2019-01-15 | A kind of discharge resistance external three-phase low-voltage capacitor cover board |
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| Publication Number | Publication Date |
|---|---|
| CN209374279U true CN209374279U (en) | 2019-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920063157.7U Active CN209374279U (en) | 2019-01-15 | 2019-01-15 | A kind of discharge resistance external three-phase low-voltage capacitor cover board |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112563024A (en) * | 2020-12-21 | 2021-03-26 | 江苏现代电力科技股份有限公司 | Explosion-proof cylindrical three-phase low-voltage power capacitor and assembling method thereof |
-
2019
- 2019-01-15 CN CN201920063157.7U patent/CN209374279U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112563024A (en) * | 2020-12-21 | 2021-03-26 | 江苏现代电力科技股份有限公司 | Explosion-proof cylindrical three-phase low-voltage power capacitor and assembling method thereof |
| CN112563024B (en) * | 2020-12-21 | 2022-03-25 | 江苏现代电力科技股份有限公司 | Explosion-proof cylindrical three-phase low-voltage power capacitor and assembling method thereof |
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