CN201766343U - Integrated three-phase high-tension current transformer with voltage signal acquiring function - Google Patents

Integrated three-phase high-tension current transformer with voltage signal acquiring function Download PDF

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Publication number
CN201766343U
CN201766343U CN2010202325880U CN201020232588U CN201766343U CN 201766343 U CN201766343 U CN 201766343U CN 2010202325880 U CN2010202325880 U CN 2010202325880U CN 201020232588 U CN201020232588 U CN 201020232588U CN 201766343 U CN201766343 U CN 201766343U
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CN
China
Prior art keywords
voltage
transformer
zero
phase high
protective current
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN2010202325880U
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Chinese (zh)
Inventor
魏贞祥
潘新华
王海涛
张中印
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BEIJING PINGKAI INTELLIGENT ELECTRIC Co Ltd
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BEIJING PINGKAI INTELLIGENT ELECTRIC Co Ltd
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Priority to CN2010202325880U priority Critical patent/CN201766343U/en
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Publication of CN201766343U publication Critical patent/CN201766343U/en
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Abstract

The utility model discloses an integrated three-phase high-tension current transformer with a voltage signal acquiring function, which comprises a zero-sequence mutual inductor. Two or three protective current transformers are arranged on the inner side of the zero-sequence mutual inductor, a voltage inductor is further disposed on the inner side of each protective current transformer, the protective current transformers, the zero-sequence mutual inductor and the voltage inductors are cast integrally via silica gel, the silica gel forms a silica gel casting layer, and the protective current transformers, the zero-sequence mutual inductor and the voltage inductors are respectively connected with outgoing lines used for outputting electric signals. The integrated three-phase high-tension current transformer with a voltage signal acquiring function is compact in structure and convenient in installation and use, and can simultaneously realize acquisition of three-phase circuit current, zero-sequence current and three-phase voltage signals.

Description

The integral type three-phase high-voltage current transformer of signals collecting with voltage
Technical field
The utility model relates to a kind of current transformer, specifically a kind of integral type three-phase high-voltage current transformer of signals collecting with voltage.
Background technology
What existing high-pressure vacuum switch used is three or two single protective current instrument transformers, also need install zero sequence current mutual inductor again additional when needing zero-sequence current protection, also need install voltage transformer additional when needing zero-sequence voltage protection.This setup parts are more, install and use trouble, and cost is higher, and causes in disorder, the irregularity of device interior easily.
The utility model content
Technical problem to be solved in the utility model provides a kind of integral type three-phase high-voltage current transformer of signals collecting with voltage of the collection that can realize three-phase line electric current, zero-sequence current and three-phase voltage signal simultaneously.
To achieve these goals, the technical solution adopted in the utility model is as follows:
The integral type three-phase high-voltage current transformer of signals collecting with voltage of the present utility model; comprise zero-sequence transformer; be provided with two or three protective current instrument transformers in described zero-sequence transformer inboard; inboard at each described protective current instrument transformer also respectively is provided with a voltage sensor; described protective current instrument transformer; zero-sequence transformer and voltage sensor are pressed as a whole by silica gel die casting; described silica gel constitutes silica gel die casting layer, described protective current instrument transformer; zero-sequence transformer; be connected with the lead-out wire that is used to export the signal of telecommunication on the voltage sensor respectively.
Preferably, described lead-out wire is drawn by two or three lead-out wire arms, and is connected on the binding post on the described lead-out wire arm.
Preferably, between described protective current instrument transformer and the described voltage sensor, be filled with silica gel or polyester film between the centre bore of described voltage sensor and described protective current instrument transformer.
Preferably, described silica gel die casting layer is provided with at least one through hole.Preferred, described protective current instrument transformer has 3, and described through hole has four and be separately positioned between three described protective current instrument transformers.
The beneficial effects of the utility model are as follows:
The integral type three-phase high-voltage current transformer of signals collecting with voltage of the present utility model is cast into an integral body with protective current instrument transformer, zero-sequence transformer and voltage sensor, and compact conformation is easy to install.Can realize the collection of three-phase line electric current, zero-sequence current and three-phase voltage signal simultaneously.Be arranged on the hole on the silica gel die casting layer, can reduce the weight of whole device, the convenient use.
Description of drawings
Fig. 1 is the structural representation of an embodiment of integral type three-phase high-voltage current transformer of signals collecting with voltage of the present utility model;
Fig. 2 is the integral type three-phase high-voltage current transformer user mode schematic diagram of signals collecting with voltage of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments the technical solution of the utility model is further described.
Referring to accompanying drawing 1; the integral type three-phase high-voltage current transformer of signals collecting with voltage of the present utility model; form by protective current instrument transformer 1, zero-sequence transformer 2 and voltage sensor 3; protective current instrument transformer 1 is provided with two or three as required; and be arranged on zero-sequence transformer 2 inboards, shown in Fig. 1 the embodiment that three protective current instrument transformers 1 are set.Inboard at each protective current instrument transformer 1 also respectively is provided with a voltage sensor 3.Protective current instrument transformer 1, zero-sequence transformer 2 and voltage sensor 3 are fixed into an integral body by silica gel die casting layer 4.In order to export the signal of telecommunication; on zero-sequence transformer 2, be connected with two lead-out wires that are used to export the current signal of needs; also be connected with two lead-out wires that are used to export the current signal of needs on each protective current instrument transformer 1 respectively; be connected with a lead-out wire on each voltage sensor 3, and be used to export the required voltage signal with the lead-out wire cooperation that is connected in shell or ground connection.In order to make structure more succinct, the loop line of each protective current instrument transformer 1 connected earlier drawing as a lead-out wire, in like manner, the ground wire of each voltage sensor 3 is also connected earlier and draws as a lead-in wire.
Using for convenience, two or three lead-out wire arms are set, and described lead-out wire is drawn by the lead-out wire arm, be connected on the binding post on the lead-out wire arm, is the execution mode that three lead-out wire arms 5 are set among Fig. 1.
In order to alleviate the weight of whole device, several through holes 6 are set on silica gel die casting layer 4.
Referring to accompanying drawing 2, the integral type three-phase high-voltage current transformer of signals collecting with voltage of the present utility model can use on primary cut-out, replaces original protective current instrument transformer, zero sequence current mutual inductor and voltage signal instrument transformer.During use; the three-phase inlet wire 7 of circuit breaker passes three current transformers respectively; during breaker closing; three protective current instrument transformers go out three-phase current signal by electromagnetic induction respectively; three-phase current signal herein has four: the electric current on the induced current of three protective current instrument transformers and the loop line of merging; these four current signals are drawn via lead respectively, give controller.Inlet wire lead, voltage sensor, protective current instrument transformer all are metallic conductors, that fills between them has silica gel or a polyester film, thereby form the electric capacity of two series connection, according to the capacitance partial pressure principle, draw a lead from voltage sensor, (shell) has voltage signal over the ground, three inductors just have four voltage signals, voltage on the induced voltage on three voltage sensors and the loop line of merging, this three-phase voltage signal is also introduced controller, whether the basis for estimation and the basis for estimation that has or not residual voltage of electricity is arranged as circuit breaker; Zero-sequence transformer is also drawn two leads and is introduced controller; identical as if the electric current that passes through in three protective current instrument transformers; zero-sequence transformer can not responded to electric current, if inequalityly will induce current signal, controller is judged whether balance of three-phase current according to the zero-sequence current size that induces.

Claims (5)

1. the integral type three-phase high-voltage current transformer of signals collecting with voltage; it is characterized in that: comprise zero-sequence transformer; be provided with two or three protective current instrument transformers in described zero-sequence transformer inboard; inboard at each described protective current instrument transformer also respectively is provided with a voltage sensor; described protective current instrument transformer; zero-sequence transformer and voltage sensor are as a whole by silica gel die casting; described silica gel constitutes silica gel die casting layer, described protective current instrument transformer; zero-sequence transformer; be connected with the lead-out wire that is used to export the signal of telecommunication on the voltage sensor respectively.
2. the integral type three-phase high-voltage current transformer of signals collecting with voltage according to claim 1, it is characterized in that: described lead-out wire is drawn by two or three lead-out wire arms, and is connected on the binding post on the described lead-out wire arm.
3. the integral type three-phase high-voltage current transformer of signals collecting with voltage according to claim 1 is characterized in that: between described protective current instrument transformer and the described voltage sensor, be provided with filling gel or polyester film between the centre bore of described voltage sensor and described protective current instrument transformer.
4. the integral type three-phase high-voltage current transformer of signals collecting with voltage according to claim 1, it is characterized in that: described silica gel die casting layer is provided with at least one through hole.
5. the integral type three-phase high-voltage current transformer of signals collecting with voltage according to claim 4, it is characterized in that: described protective current instrument transformer has 3, and described through hole has four and be separately positioned between three described protective current instrument transformers.
CN2010202325880U 2010-06-22 2010-06-22 Integrated three-phase high-tension current transformer with voltage signal acquiring function Expired - Lifetime CN201766343U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010202325880U CN201766343U (en) 2010-06-22 2010-06-22 Integrated three-phase high-tension current transformer with voltage signal acquiring function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010202325880U CN201766343U (en) 2010-06-22 2010-06-22 Integrated three-phase high-tension current transformer with voltage signal acquiring function

Publications (1)

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CN201766343U true CN201766343U (en) 2011-03-16

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103076481A (en) * 2012-12-26 2013-05-01 北京科锐配电自动化股份有限公司 Three-phase integrated electronic transformer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103076481A (en) * 2012-12-26 2013-05-01 北京科锐配电自动化股份有限公司 Three-phase integrated electronic transformer

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Granted publication date: 20110316

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