CN204087956U - A kind of neutral point grounding resistor - Google Patents
A kind of neutral point grounding resistor Download PDFInfo
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- CN204087956U CN204087956U CN201420620095.2U CN201420620095U CN204087956U CN 204087956 U CN204087956 U CN 204087956U CN 201420620095 U CN201420620095 U CN 201420620095U CN 204087956 U CN204087956 U CN 204087956U
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- resistive band
- band
- resistive
- open slot
- resistor
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Abstract
The utility model relates to a kind of neutral point grounding resistor, it comprises resistive band I, resistive band II, resistive band I is arc, resistive band I is provided with the groove of a side opening in arc middle part level, the top trough rim of the open slot of the resistive band I of resistive band II one end and adjacent side is fixed together, the bottom trough rim of the open slot of the other end of resistive band II and the resistive band I of adjacent opposite side is fixed together, resistive band I alternately links together by resistive band II, the bottom of the open slot of first resistive band I is the input of resistor, the other end of afterbody resistive band II is the output of resistor.The utility model resistive band I is arc, and be provided with open slot at middle part, adjacent open slot is connected by resistive band II, thus define upper and lower two-layer resistive band and be cascaded, the electric current side of upper strata, lower resistors band is also identical, therefore, Ampere force is cancelled out each other, and adjacent two panels resistive band can not contact thus can not short circuit burn out.
Description
Technical field
The utility model relates to resistor technologies field, particularly relates to a kind of neutral point grounding resistor.
Background technology
Neutral point grounding resistor is the important component part of electric system protection device, is used in electric power system mesohigh generator or transformer and connects between neutral point and the earth, can restricted grounding current or leakage current to a kind of protection type electrical equipment of the scope preset.At present, existing neutral point grounding resistor comprises skeleton and resistance unit, its resistance unit generally adopts Zinc oxide ceramic linear resistor, Zinc oxide ceramic linear resistor temperature rise is low, volume is large, complex process, resistance deviation is large, if meet big current, small resistor occasion, same volume is large, price, complex structure.During this electric resistance structure work, the current direction of adjacent two sheet resistors is contrary, according to physical knowledge, resistance can be subject to the effect of Ampere force, attracts each other, when there is the fault of single-phase earthing, easily there is adjacent two panels Ohmic contact to situation together in existing neutral point grounding resistor, thus cause resistive element short circuit, cause resistor to burn out, even can cause security incident.
Utility model content
The purpose of this utility model is that overcoming above defect provides the neutral point grounding resistor that a kind of structure is simple, volume is little, safe and reliable.
The technical solution of the utility model is: a kind of neutral point grounding resistor, it comprises resistive band I, also comprise resistive band II, resistive band I is arc, resistive band I is provided with the groove of a side opening in arc middle part level, the top trough rim of the open slot of the resistive band I of resistive band II one end and adjacent side is fixed together, the bottom trough rim of the open slot of the other end of resistive band II and the resistive band I of adjacent opposite side is fixed together, resistive band I alternately links together by resistive band II, the bottom of the open slot of first resistive band I is the input of resistor, the other end of afterbody resistive band II is the output of resistor.
In order to increase area of dissipation, the surface of resistive band I is provided with ventilation slot.
In order to increase the structural strength of resistive band and high temperature resistant, big current, described resistive band I and resistive band II are stainless steel alloy material.
The utility model Advantageous Effects is: resistive band I is for arc, and be provided with open slot at middle part, adjacent open slot is connected by resistive band II, thus defines upper and lower two-layer resistive band and be cascaded, and the electric current side of upper strata, lower resistors band is also identical, therefore, Ampere force is cancelled out each other, and adjacent two panels resistive band can not contact thus can not short circuit burn out, and resistive band is provided with ventilation slot and adopts stainless steel alloy material in addition, area of dissipation is large, high temperature resistant, big current.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention 1;
Fig. 2 is the structure chart of the embodiment of the present invention 1 resistive band I and resistive band II.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail:
With reference to accompanying drawing, a kind of neutral point grounding resistor, it comprises resistive band I 3, resistive band II 4, resistive band I 3 is arc, the arc middle part level of resistive band I 3 is provided with the groove of a side opening, the top trough rim of the open slot of resistive band I 3-1 of resistive band II 4-1 one end and adjacent side is fixed together, the bottom trough rim of the open slot of the other end of resistive band II 4-1 and resistive band I 3-2 of adjacent opposite side is fixed together, resistive band II 4-2, resistive band II 4-3 is successively by resistive band I 3-2, resistive band I 3-3, resistive band I 3-4 links together, the bottom of the open slot of first resistive band I 3-1 is the input of resistor, the other end of afterbody resistive band II 4-4 is the output of resistor, in order to increase area of dissipation, the surface of resistive band I 3 is provided with ventilation slot, in order to increase the structural strength of resistive band and high temperature resistant, big current, described resistive band I 3 and resistive band II 4 are stainless steel alloy material, insulation porcelain 6 is located between resistive band I 3, resistive band I 3 and insulation porcelain 6 are fixed on insulation blanket stud 2, insulation blanket stud 2 is fixed on two side plates 1, in order to vibration damping, also comprise insulating washer 5, insulating washer 5 is located at resistive band I 3 and insulation porcelain 6 contact position.
Be more than a kind of execution mode of the present utility model, a preferred demonstration example.The scope of the utility model application request protection has more than and is limited to described execution mode.All technical schemes with the present embodiment equivalence; as needed according to design the quantity increasing resistive band I 3 and resistive band II 4; or first resistive band II 4 is connected with the bottom notch of first resistive band I 3; thus the top of the open slot of first resistive band I 3-1 is the input of resistor, it all belongs to protection range of the present utility model.
Claims (3)
1. a neutral point grounding resistor, it comprises resistive band I, it is characterized in that, also comprise resistive band II, resistive band I is arc, resistive band I is provided with the groove of a side opening in arc middle part level, the top trough rim of the open slot of the resistive band I of resistive band II one end and adjacent side is fixed together, the bottom trough rim of the open slot of the other end of resistive band II and the resistive band I of adjacent opposite side is fixed together, resistive band I alternately links together by resistive band II, the bottom of the open slot of first resistive band I is the input of resistor, the other end of afterbody resistive band II is the output of resistor.
2. a kind of neutral point grounding resistor according to claim 1, is characterized in that, the surface of described resistive band I is provided with ventilation slot.
3. according to a kind of neutral point grounding resistor according to claim 1 or claim 2, it is characterized in that, described resistive band I and resistive band II are stainless steel alloy material.
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420620095.2U CN204087956U (en) | 2014-10-25 | 2014-10-25 | A kind of neutral point grounding resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420620095.2U CN204087956U (en) | 2014-10-25 | 2014-10-25 | A kind of neutral point grounding resistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204087956U true CN204087956U (en) | 2015-01-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420620095.2U Active CN204087956U (en) | 2014-10-25 | 2014-10-25 | A kind of neutral point grounding resistor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204087956U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105590711A (en) * | 2016-02-29 | 2016-05-18 | 国家电网公司 | U-shaped grounding resistor |
-
2014
- 2014-10-25 CN CN201420620095.2U patent/CN204087956U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105590711A (en) * | 2016-02-29 | 2016-05-18 | 国家电网公司 | U-shaped grounding resistor |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |