CN205229267U - Transient overvoltage monitoring is with low pressure arm condenser - Google Patents
Transient overvoltage monitoring is with low pressure arm condenser Download PDFInfo
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- CN205229267U CN205229267U CN201520855988.XU CN201520855988U CN205229267U CN 205229267 U CN205229267 U CN 205229267U CN 201520855988 U CN201520855988 U CN 201520855988U CN 205229267 U CN205229267 U CN 205229267U
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- metal shell
- cable
- transient overvoltage
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Abstract
The utility model discloses a transient overvoltage monitoring is with low pressure arm condenser, the present invention comprises a metal casing, the last primary equipment of being provided with of metal casing gets the signaling point, primary equipment gets the signaling point and links to each other with the input terminal, the input terminal sets up in metal casing, be provided with a plurality of shunt capacitance wares group in the metal casing, shunt capacitance ware group is formed by connecting through threaded connection spare a plurality of low -capacitance wares, shunt capacitance ware group is parallelly connected to the input terminal on through the cable, the duplex wire of cable for taking the shielding layer, cable shield layer and ground copper bars are connected, ground copper bars links to each other with metal casing, metal casing ground connection, be provided with signal sampling point in the every shunt capacitance of group ware group, signal sampling point links to each other with external equipment through the signal output cable, should low pressure arm condenser for establish ties with high -pressure electric capacity type equipment and form capacitive voltage divider, obtain high voltage electric network's the voltage signal that crosses, can improve the response characteristic of divider greatly.
Description
Technical field
The utility model relates to Hyper-Voltage of Power Systems monitoring field, particularly a kind of transient overvoltage monitoring low-voltage arm capacitor.
Background technology
Superpotential as a kind of power system voltage raise phenomenon very general appear in transformer station, its profound influence the safety and stability of electrical production, if various superpotential perfection can be caught and analyzed and application of results will be produced huge economic benefit and social benefit in electrical production.Real-time Obtaining overvoltage signal is the important step of over-voltage monitoring.At present, high-voltage bleeder is commonly used to obtain voltage signal in over-voltage monitoring field, high-voltage bleeder structure is simple, and measuring accuracy is high, and transient response characteristic is good, but, when requiring voltage divider to be parallel to the higher system of electric pressure, the reliability of its long-time running, heating, impedance matching must be considered and exchange the series of problems such as impact, simultaneously, the installation of voltage divider too increases primary equipment Input, and this implements to be very difficult in electric system.Therefore, need a kind of new over-voltage monitoring device, make full use of system existing equipment, realize the monitoring to electrical network inside and atmospheric over-voltage.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of transient overvoltage monitoring low-voltage arm capacitor, for being composed in series capacitive divider with high voltage capacitive-type equipment, obtaining the overvoltage signal of high-voltage fence, greatly can improve the response characteristic of voltage divider.
The purpose of this utility model is achieved through the following technical solutions:
Low-voltage arm capacitor is used in a kind of transient overvoltage monitoring, comprise metal shell, described metal shell is provided with primary equipment and gets signaling point, described primary equipment is got signaling point and is connected with input terminal, described input terminal is arranged in metal shell, some Shunt Capacitor Unit are provided with in described metal shell, described Shunt Capacitor Unit is threaded connection part by multiple small capacitor and is formed by connecting, described Shunt Capacitor Unit is connected in parallel on input terminal by cable, described cable is the duplex wire of band screen layer, described cable shield is connected with grounding copper bar, described grounding copper bar is connected with metal shell, metal shell ground connection, described often group in Shunt Capacitor Unit is provided with sample of signal point, described sample of signal point is connected with external unit by signal output cable.
Further, described input terminal comprises short circuit copper bar and binding post, and described short circuit copper bar one end is got signaling point with primary equipment and is connected, and the described short circuit copper bar other end is connected with Shunt Capacitor Unit;
Further, described small capacitor is four, and described Shunt Capacitor Unit is three groups;
Further, multiple discharge tube in parallel and voltage dependent resistor (VDR) on described input terminal;
Further again, described metal shell scribbles waterproof anti-condensation layer.
The beneficial effects of the utility model are:
Transient overvoltage monitoring low-voltage arm capacitor of the present utility model, for being composed in series capacitive divider with high voltage capacitive-type equipment, obtains the overvoltage signal of high-voltage fence; The small capacitor of this low-voltage arm capacitor is threaded connection part and is formed by connecting, the length of cable can be reduced to greatest extent, thus reduce the impact of stray inductance, the stray electrical sensibility reciprocal of capacitance group can be reduced between Shunt Capacitor Unit with cable parallel connection, and then improve the response characteristic of voltage divider.
Other advantages of the present utility model, target and feature will be set forth to a certain extent in the following description, and to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, or can be instructed from practice of the present utility model.Target of the present utility model and other advantages can be realized by instructions below and obtain.
Accompanying drawing explanation
In order to make the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, the utility model is described in further detail, wherein:
Fig. 1 is the schematic diagram of the utility model transient overvoltage monitoring low-voltage arm capacitor;
Fig. 2 is the utility model transient overvoltage monitoring low-voltage arm capacitor internal structural drawing;
Fig. 3 is the wiring enlarged drawing of Shunt Capacitor Unit;
Fig. 4 is the wiring enlarged drawing of input end.
Embodiment
Hereinafter with reference to accompanying drawing, preferred embodiment of the present utility model is described in detail.Should be appreciated that preferred embodiment only in order to the utility model is described, instead of in order to limit protection domain of the present utility model.
As Figure 1-3, low-voltage arm capacitor is used in transient overvoltage monitoring, comprise metal shell 1, in the present embodiment, metal shell scribbles waterproof anti-condensation layer, metal shell ground connection, realize the electromagnetic screen to core component, metal shell is provided with primary equipment and gets signaling point 2, primary equipment is got signaling point and is connected with input terminal, input terminal is arranged in metal shell, three groups of Shunt Capacitor Unit 3 are provided with in metal shell, Shunt Capacitor Unit is formed by connecting by bolt 13 by 4 small capacitors 4, Shunt Capacitor Unit is connected in parallel on input terminal by cable 5, cable is the duplex wire of band screen layer, two conductor lengths are identical, and inner two wires of screen layer are fastened in an insulation course remains parastate, the stray inductance of wire can be balanced out to greatest extent in this state, cable shield is connected with grounding copper bar 6, grounding copper bar is connected with metal shell, often organize in Shunt Capacitor Unit and be provided with sample of signal point 7, sample of signal point is connected with external unit by signal output cable 8.
As shown in Figure 4, in the present embodiment, input terminal comprises short circuit copper bar 9 and binding post 10, and short circuit copper bar one end is got signaling point with primary equipment and is connected, and the short circuit copper bar other end is connected with Shunt Capacitor Unit.
Improve further as the utility model; multiple discharge tube 11 in parallel and voltage dependent resistor (VDR) 12 on input terminal; can protect whole voltage divider and subordinate equipment when instantaneous voltage increases, multiple protection element in parallel can ensure that protective loop can normally work when some element is breakdown or lost efficacy.
Transient overvoltage monitoring low-voltage arm capacitor of the present utility model, for being composed in series capacitive divider with high voltage capacitive-type equipment, obtains the overvoltage signal of high-voltage fence; The small capacitor of this low-voltage arm capacitor is threaded connection part and is formed by connecting, the length of cable can be reduced to greatest extent, thus reduce the impact of stray inductance, the stray electrical sensibility reciprocal of capacitance group can be reduced between Shunt Capacitor Unit with cable parallel connection, and then improve the response characteristic of voltage divider.
What finally illustrate is, above embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify to the technical solution of the utility model or equivalent replacement, and not departing from aim and the scope of the technical program, it all should be encompassed in the middle of right of the present utility model.
Claims (5)
1. low-voltage arm capacitor is used in a transient overvoltage monitoring, it is characterized in that: comprise metal shell (1), described metal shell is provided with primary equipment and gets signaling point (2), described primary equipment is got signaling point and is connected with input terminal, described input terminal is arranged in metal shell, some Shunt Capacitor Unit (3) are provided with in described metal shell, described Shunt Capacitor Unit is threaded connection part by multiple small capacitor (4) and is formed by connecting, described Shunt Capacitor Unit is connected in parallel on input terminal by cable (5), described cable is the duplex wire of band screen layer, described cable shield is connected with grounding copper bar (6), described grounding copper bar is connected with metal shell, described metal shell ground connection, described often group in Shunt Capacitor Unit is provided with sample of signal point (7), described sample of signal point is connected with external unit by signal output cable (8).
2. a kind of transient overvoltage monitoring low-voltage arm capacitor according to claim 1, it is characterized in that: described input terminal comprises short circuit copper bar (9) and binding post (10), described short circuit copper bar one end is got signaling point with primary equipment and is connected, and the described short circuit copper bar other end is connected with Shunt Capacitor Unit.
3. a kind of transient overvoltage monitoring low-voltage arm capacitor according to claim 1 and 2, it is characterized in that: described small capacitor is four, described Shunt Capacitor Unit is three groups.
4. a kind of transient overvoltage monitoring low-voltage arm capacitor according to claim 1, is characterized in that: multiple discharge tube (11) in parallel and voltage dependent resistor (VDR) (12) on described input terminal.
5. a kind of transient overvoltage monitoring low-voltage arm capacitor according to claim 1 and 2, is characterized in that: described metal shell scribbles waterproof anti-condensation layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520855988.XU CN205229267U (en) | 2015-10-30 | 2015-10-30 | Transient overvoltage monitoring is with low pressure arm condenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520855988.XU CN205229267U (en) | 2015-10-30 | 2015-10-30 | Transient overvoltage monitoring is with low pressure arm condenser |
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| Publication Number | Publication Date |
|---|---|
| CN205229267U true CN205229267U (en) | 2016-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520855988.XU Active CN205229267U (en) | 2015-10-30 | 2015-10-30 | Transient overvoltage monitoring is with low pressure arm condenser |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112362951A (en) * | 2020-11-23 | 2021-02-12 | 云南电网有限责任公司临沧供电局 | Buckle formula is based on embedded capacitive screen's overvoltage monitoring devices |
-
2015
- 2015-10-30 CN CN201520855988.XU patent/CN205229267U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112362951A (en) * | 2020-11-23 | 2021-02-12 | 云南电网有限责任公司临沧供电局 | Buckle formula is based on embedded capacitive screen's overvoltage monitoring devices |
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| GR01 | Patent grant |