CN202735390U - Three-phase zero sequence combined type voltage sensing device - Google Patents

Three-phase zero sequence combined type voltage sensing device Download PDF

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Publication number
CN202735390U
CN202735390U CN 201220239818 CN201220239818U CN202735390U CN 202735390 U CN202735390 U CN 202735390U CN 201220239818 CN201220239818 CN 201220239818 CN 201220239818 U CN201220239818 U CN 201220239818U CN 202735390 U CN202735390 U CN 202735390U
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China
Prior art keywords
terminal
voltage
insulator
voltage signal
phase
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Expired - Fee Related
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CN 201220239818
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Chinese (zh)
Inventor
黄伟军
周斌
钱远驰
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Zhuhai XJ Electric Co Ltd
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Zhuhai XJ Electric Co Ltd
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Priority to CN 201220239818 priority Critical patent/CN202735390U/en
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Abstract

The utility model discloses a three-phase zero sequence combined type voltage sensing device. The device comprises a phase sequence voltage signal sampling module, a zero sequence voltage signal sampling module and three high-tension capacitors, wherein the phase sequence voltage signal sampling module, the zero sequence voltage signal sampling module and the three high-tension capacitors are connected. Each high-tension capacitor includes an insulator and a capacitor fuse arranged inside the insulator. The insulator is provided with a first terminal, a second terminal and a fixed terminal. The device helps to overcome defects that an electromagnetic voltage transformer is liable to be damaged due to saturation and resonance, and enables costs and a period of production to be effectively reduced. The adoption of a combined type structure helps to ensure that the size, the mass and the cost of the device are relatively minimized, and allows reliability of running of the device to be guaranteed. In particular, the insulator is wrapped outside each high-tension capacitor and the fixed terminal is disposed outside each high-tension capacitor, so that each high-tension capacitor can be conveniently mounted on a vacuum switch (cabinet), insulation and supporting functions are exhibited while a phase sequence voltage signal and a zero sequence voltage signal are obtained, and the overall function is optimized to the maximum.

Description

Three-phase zero sequence combination voltage communication sensing device
Technical field
The utility model relates to a kind of intelligent electric mesh element, is specially a kind of three-phase zero sequence combination voltage communication sensing device.
Background technology
Power distribution network is important step in the electric system, can the user obtain safe and reliable electric energy, vacuum switch in the power distribution network (cabinet) plays an important role, and particularly intelligentized vacuum switch (cabinet) equipment has become the preferred unit in the distribution network system.
Lasting propelling along with the intelligent power network construction; the user has proposed more higher demands to the vacuum switch (cabinet) that is used for line fault protection; require the switch integrated more perception of energy and measuring sensor; so that operations staff and opertaing device can obtain more circuit operation real-time information by switch, make switching control device can fast and reliable ground judge each fault that occurs on the circuit and process.At present, vacuum switch (cabinet) mainly is by electromagnetic potential transformer or single-phase voltage sensor and residual voltage sensor independently to the perception of line voltage distribution and measurement approach, wherein electromagnetic potential transformer causes vacuum switch (cabinet) volume to be difficult to dwindle with quality and is difficult to reduce because volume is large, quality is large; What electromagnetic potential transformer adopted is the iron core coil structure principle, and in the power distribution network of complexity, being easy to has increased the failure rate of vacuum switch (cabinet) because core sataration, iron core resonance etc. damages; The electromagnetic potential transformer cost is high, the production cycle long cause vacuum switch (cabinet) also corresponding cost is high, the production cycle is long.Single-phase voltage sensor and independently the residual voltage sensor is because required high voltage device is more, volume, quality, cost are also relatively large, have also reduced in theory the reliability of vacuum switch (cabinet).
So present electromagnetic potential transformer, single-phase voltage sensor and independently the residual voltage sensor have certain defective.
Summary of the invention
Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art, provides that a kind of cost is low, volume is little, lightweight, processing is easy, be easy to produce in enormous quantities, the three-phase zero sequence combination voltage communication sensing device of stable performance.
The utility model is that the technical scheme that its technical matters of solution adopts is:
Three-phase zero sequence combination voltage communication sensing device, comprise phase sequence voltage signal sampling module, residual voltage sample of signal module and three high-voltage capacitances, high-voltage capacitance comprises insulator and is installed on the interior capacitor core of insulator, be provided with the first terminal and the second terminal that is electrically connected with the two ends of capacitor core on the insulator in the both sides of capacitor core, also be provided with the fixed terminal that is used for installation with the first terminal and the insulation of the second terminal on the insulator, the first terminal of three high-voltage capacitances is connected with high-voltage charged body respectively, the second terminal is connected with the input side of phase sequence voltage signal sampling module, and the outgoing side of phase sequence voltage signal sampling module is connected with residual voltage sample of signal module.
Preferably, the first terminal is configured to the can be used for hard-wired structure identical with the fixed terminal shape.
Preferably, described capacitor core adopts pottery to form as the pole plate sintering for medium, silver film.
Preferably, described insulator forms by epoxy resin casting, and capacitor core, the first terminal, the second terminal and fixed terminal are by the insulator structure that is connected.
Preferably, the connecting line between the connecting line between the second terminal and the phase sequence voltage signal sampling module and phase sequence voltage signal sampling module and the residual voltage sample of signal module is the cable with screen layer.
The beneficial effects of the utility model are: the utility model can overcome electromagnetic potential transformer because of the defective saturated, that resonance damages by the high-voltage capacitance detectable voltage signals, and has effectively reduced cost and the production cycle of device; The fabricated structure that the utility model adopts can overcome single-phase voltage sensor, the more problem of independent residual voltage sensor element, guarantees that device volume, quality and cost can relatively reduce, and has guaranteed the reliability of device work; The form for insulator parcel, peripheral hardware fixed terminal that adopts of high-voltage capacitance particularly, guaranteed that high-voltage capacitance can be installed on the vacuum switch (cabinet) easily, it can also play the insulating supporting effect when obtaining phase sequence voltage signal and residual voltage signal, allomeric function gets the maximum optimization.
Description of drawings
Be further detailed below in conjunction with the drawings and specific embodiments:
Fig. 1 is the utility model structured flowchart.
Embodiment
The utility model generally is applied on the vacuum switch (cabinet) of power distribution network, for detection of three-phase phase-sequence voltage signal and residual voltage signal.
As shown in Figure 1, three-phase zero sequence combination voltage communication sensing device of the present utility model comprises phase sequence voltage signal sampling module 1, residual voltage sample of signal module 2 and three high-voltage capacitances 3.High-voltage capacitance 3 comprises insulator 31 and is installed on capacitor core 32 in the insulator 31, be provided with the first terminal 33 and the second terminal 34 that is electrically connected with the two ends of capacitor core 32 in the both sides of capacitor core 32 on the insulator 31, also be provided with the fixed terminal 35 that is used for installation with the first terminal 33 and 34 insulation of the second terminal on the insulator 31.The first terminal 33 of three high-voltage capacitances 3 is connected with high-voltage charged body respectively, and the second terminal 34 is connected with the input side of phase sequence voltage signal sampling module 1, and the outgoing side of phase sequence voltage signal sampling module 1 is connected with residual voltage sample of signal module 2.When the utility model was used, high-voltage capacitance was fixed on the vacuum switch (cabinet) by fixed terminal 35, and high-voltage capacitance can also play the insulating supporting effect in switch (cabinet) gearing when getting access to phase sequence voltage signal and residual voltage signal.
Because the first terminal 33 is for being connected with high-voltage charged body on the vacuum switch (cabinet), connect for convenient, the first terminal 33 is preferably configured as the can be used for hard-wired structure identical with fixed terminal 35 shapes, be that this first terminal is a fixed terminal of holding concurrently and being electrically connected, this structure is the compactness of assurance device integral body further.
In order to guarantee that the high-voltage capacitance output sensitivity is high, stable performance, the capacitor core 32 preferred potteries that adopt form as the pole plate sintering for medium, silver film.And insulator 31 forms by epoxy resin casting, and capacitor core 32, the first terminal 33, the second terminal 34 and fixed terminal 35 are by insulator 31 structure that is connected.In addition, the temperature characterisitic of phase sequence voltage signal sampling module, residual voltage sample of signal module and high-voltage capacitance should be consistent, guarantees that the residual capacitance of high-voltage capacitance can discharge as early as possible, and compensation high-voltage capacitance temperature is floated the error that causes.
In addition, in order further to guarantee the accurate of measurement result, the connecting line between the connecting line between the second terminal 34 and the phase sequence voltage signal sampling module 1 and phase sequence voltage signal sampling module 1 and the residual voltage sample of signal module 2 is the cable with screen layer.
The whole assembling of the utility model and wiring are very simple and convenient, and it has, and cost is low, volume is little, lightweight, processing is easy, be easy to production in enormous quantities; The characteristics such as output sensitivity is high, stable performance, and function is many.

Claims (5)

1. three-phase zero sequence combination voltage communication sensing device, it is characterized in that comprising phase sequence voltage signal sampling module (1), residual voltage sample of signal module (2) and three high-voltage capacitances (3), high-voltage capacitance (3) comprises insulator (31) and is installed on the interior capacitor core (32) of insulator (31), upper the first terminal (33) and the second terminal (34) that is electrically connected with the two ends of capacitor core (32) that be provided with in the both sides of capacitor core (32) of insulator (31), also be provided with the fixed terminal (35) that is used for installation with the first terminal (33) and the second terminal (34) insulation on the insulator (31), the first terminal (33) of three high-voltage capacitances (3) is connected with high-voltage charged body respectively, the second terminal (34) is connected with the input side of phase sequence voltage signal sampling module (1), and the outgoing side of phase sequence voltage signal sampling module (1) is connected with residual voltage sample of signal module (2).
2. three-phase zero sequence combination voltage communication sensing device according to claim 1 is characterized in that the first terminal (33) is configured to the can be used for hard-wired structure identical with fixed terminal (35) shape.
3. three-phase zero sequence combination voltage communication sensing device according to claim 1 is characterized in that described capacitor core (32) adopts pottery to form as the pole plate sintering for medium, silver film.
4. three-phase zero sequence combination voltage communication sensing device according to claim 1, it is characterized in that described insulator (31) forms by epoxy resin casting, capacitor core (32), the first terminal (33), the second terminal (34) and fixed terminal (35) are by insulator (31) structure that is connected.
5. three-phase zero sequence combination voltage communication sensing device according to claim 1 is characterized in that connecting line between the second terminal (34) and the phase sequence voltage signal sampling module (1) and the connecting line between phase sequence voltage signal sampling module (1) and the residual voltage sample of signal module (2) are the cable with screen layer.
CN 201220239818 2012-05-25 2012-05-25 Three-phase zero sequence combined type voltage sensing device Expired - Fee Related CN202735390U (en)

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CN 201220239818 CN202735390U (en) 2012-05-25 2012-05-25 Three-phase zero sequence combined type voltage sensing device

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Application Number Priority Date Filing Date Title
CN 201220239818 CN202735390U (en) 2012-05-25 2012-05-25 Three-phase zero sequence combined type voltage sensing device

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106443131A (en) * 2016-10-18 2017-02-22 珠海许继电气有限公司 Outdoor power-supply and zero-sequence-voltage measuring device
CN108646082A (en) * 2018-08-16 2018-10-12 江苏靖江互感器股份有限公司 A kind of capacitive cable type electro pressure sensor of ring main unit
CN108802478A (en) * 2018-08-16 2018-11-13 江苏靖江互感器股份有限公司 A kind of capacitive external electric pressure sensor of killer switch

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106443131A (en) * 2016-10-18 2017-02-22 珠海许继电气有限公司 Outdoor power-supply and zero-sequence-voltage measuring device
CN108646082A (en) * 2018-08-16 2018-10-12 江苏靖江互感器股份有限公司 A kind of capacitive cable type electro pressure sensor of ring main unit
CN108802478A (en) * 2018-08-16 2018-11-13 江苏靖江互感器股份有限公司 A kind of capacitive external electric pressure sensor of killer switch
CN108646082B (en) * 2018-08-16 2023-12-08 江苏靖江互感器股份有限公司 Capacitive cable type voltage sensor for ring main unit
CN108802478B (en) * 2018-08-16 2023-12-22 江苏靖江互感器股份有限公司 Capacitive external voltage sensor for breaker switch

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130213

Termination date: 20180525

CF01 Termination of patent right due to non-payment of annual fee