CN201829854U - Middle cabinet trolley of anti-resonance potential transformer - Google Patents

Middle cabinet trolley of anti-resonance potential transformer Download PDF

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Publication number
CN201829854U
CN201829854U CN201020583437XU CN201020583437U CN201829854U CN 201829854 U CN201829854 U CN 201829854U CN 201020583437X U CN201020583437X U CN 201020583437XU CN 201020583437 U CN201020583437 U CN 201020583437U CN 201829854 U CN201829854 U CN 201829854U
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CN
China
Prior art keywords
mid
cabinet
transformer
dolly
trolley
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 - Fee Related
Application number
CN201020583437XU
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Chinese (zh)
Inventor
崔成和
文晓岩
Original Assignee
崔成和
文晓岩
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 崔成和, 文晓岩 filed Critical 崔成和
Priority to CN201020583437XU priority Critical patent/CN201829854U/en
Application granted granted Critical
Publication of CN201829854U publication Critical patent/CN201829854U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to power equipment, in particular to a middle cabinet trolley. The middle cabinet trolley comprises a middle trolley body (1) of a potential transformer cabinet of the existing armored withdrawable middle metal-enclosed switch apparatus and three fuse protectors (2), three grounding potential transformers (3) with an all-insulation structure and one zero sequence potential transformer (4) are arranged on the middle trolley body (1), and the three fuse protectors (2) are respectively arranged on three contact arms (5) of the middle trolley body (1). The accidents that the transformer is burned, the fuse protector is fused and the fuse protector is fused frequently in a transient state process can be prevented owning to resonance generated by the operation of a capacitor and the potential transformer between the capacitor and the potential transformer in a 35V and below 35V ungrounded power grid, the trolley is beneficial to safe and reliable operation of the power grid, relevant accident occurrence is avoided, considerable social and economic benefits are brought, only the positions of all parts on the trolley are changed without the need of changing the structure of the original middle PT (potential transformer) cabinet, and the trolley has the advantages that the structure is simple and the installation is convenient.

Description

The mid-cabinet dolly of antiresonance voltage transformer
Technical field
The utility model relates to power equipment, particularly a kind of mid-cabinet dolly.
Background technology
The instrument transformer cabinet that the present armouring type that generally uses is removed the middle metal enclosed switchgear abbreviates mid-PT cabinet as, it is to adopt traditional star connection neutral ground to be installed on the mid-dolly by 3 semi-insulating grounding structure voltage transformers, earth-free characteristic because of 35KV and following electrical network thereof, often be in operation generation resonance between electric capacity in the electrical network and the voltage transformer and burn accidents such as instrument transformer, fusing fuse, cause economic loss in various degree.For fear of the at present effective method of the generation of above-mentioned fault is to adopt the anti-resonance scheme of 4PT combination, both on the basis of original 3 earthed voltage transformers, set up 1 zero sequential potential transformer and connected into the anti-resonance structure of 4PT, but because the inner space of the mid-dolly of former mid-PT cabinet is limit by structure, its original structure can't be put 1 zero sequential potential transformer again, can't realize the anti-resonance scheme of 4PT combination.
Summary of the invention
The purpose of this utility model provides a kind of mid-cabinet dolly of antiresonance voltage transformer that can realize the anti-resonance scheme of 4PT combination.
Technical solution of the present utility model is: it comprises that existing armouring type removes the mid-dolly car body of instrument transformer cabinet and 3 fuses of middle metal enclosed switchgear, 3 all insulation grounding structure voltage transformers and 1 zero sequential potential transformer also are installed on the mid-dolly car body, 3 fuses are installed in respectively on 3 contact arms of mid-dolly car body, one end of each fuse links to each other with the contact of each contact arm respectively, the other end links to each other with the terminals of each contact arm other end respectively, the terminals of each contact arm link to each other with an end of each voltage transformer primary side respectively, the other end of each voltage transformer primary side links to each other with an end of zero sequential potential transformer primary side jointly, and the other end of zero sequential potential transformer primary side links to each other with the earth terminal of mid-dolly car body.
Technique effect of the present utility model is: thus it is to set up 1 zero sequential potential transformer to connect into the anti-resonance structure of 4PT and realized the anti-resonance scheme of 4PT combination on original mid-dolly, can prevent to be in operation between electric capacity in 35KV and the following ungrounded electric net work and the voltage transformer and produce resonance and burn instrument transformer, frequent fusing fuse in fusing accident such as fuse and the transient process, the safe and reliable operation that more helps electrical network, avoided the generation of relevant accident, bring considerable social benefit and economic benefit, it does not need to change the structure of former mid-PT cabinet, only need to change each position component on the mid-dolly, has advantage simple in structure, easy for installation.
Description of drawings
Fig. 1 is the utility model embodiment master TV structure figure;
Fig. 2 is the utility model embodiment side-looking structure chart.
Embodiment
As Fig. 1, shown in Figure 2, it comprises that existing armouring type removes the mid-dolly car body 1 of instrument transformer cabinet and 3 fuses 2 of middle metal enclosed switchgear, 3 all insulation grounding structure voltage transformers 3 and 1 zero sequential potential transformer 4 are installed on the mid-dolly car body 1,3 fuses 2 are installed in respectively on 3 contact arms 5 of mid-dolly car body 1, one end of each fuse 2 links to each other with the contact 51 of each contact arm 5 respectively, the other end links to each other with the terminals 52 of each contact arm 5 other end respectively, the terminals 52 of each contact arm 5 link to each other with an end of each voltage transformer 3 primary side respectively, the other end of each voltage transformer 3 primary side links to each other with an end of zero sequential potential transformer 4 primary sides jointly, and the other end of zero sequential potential transformer 4 primary sides links to each other with the earth terminal of mid-dolly car body 1.
Each contact arm 5 of mid-dolly car body 1 is made of with the contact 51 that is installed in the other end of hollow insulated tube 53 by the hollow insulated tube 53 that insulator 6 is fixed on the mid-dolly car body 1 end respectively.Each fuse 2 is installed in respectively in the contact arm hollow insulated tube 53, and an end of each fuse 2 links to each other with terminals 52 on being fixed on insulator 6, the other end links to each other with contact 51.This fuse 2 mounting structures have been saved the space of dolly contact arm 5 belows, for the zero sequential potential transformer 4 that increases provides installing space.
Contact 51 is installed on the hollow insulated tube 53 by screw thread, need screw out and unload contact 51 earlier when changing and installing new fuse 2, the fuse 2 that needs are changed takes out, and inserts the fuse 2 that newly changes again, then contact 51 precessions is installed on the hollow insulated tube 53.Each voltage transformer 3 is installed in the below of the insulator 6 of coupled contact arm 5 on the mid-dolly car body 1 respectively, and zero sequential potential transformer 4 is installed in below contact arm 5 one sides of each voltage transformer 3 on the mid-dolly car body 1.
The utility model is to change 3 all insulation grounding structure voltage transformers 3 into by 3 semi-insulating grounding structure voltage transformers that former armouring type is removed on the mid-dolly of voltage transformer cabinet of middle metal enclosed switchgear, increases by 1 zero sequential potential transformer 4 again and constitutes 4PT antiresonance combination.
The fuse 2 that the inserting mode that originally was placed on contact arm 5 belows is connected is improved to and is placed on contact arm 5 inside, saves out 3 all insulation grounding structures of space mounting voltage transformer 3 of contact arm 5 belows and 1 zero sequential potential transformer 4.
Back-out and precession by contact 51 realize changing fuse 2.

Claims (5)

1. the mid-cabinet dolly of antiresonance voltage transformer, it comprises that existing armouring type removes the mid-dolly car body of instrument transformer cabinet (1) and 3 fuses (2) of middle metal enclosed switchgear, it is characterized in that: 3 all insulation grounding structure voltage transformers (3) and 1 zero sequential potential transformer (4) are installed on the mid-dolly car body (1), 3 fuses (2) are installed in respectively on 3 contact arms (5) of mid-dolly car body (1), one end of each fuse (2) links to each other with the contact (51) of each contact arm (5) respectively, the other end links to each other with the terminals (52) of each contact arm (5) other end respectively, the terminals (52) of each contact arm (5) link to each other with an end of each voltage transformer (3) primary side respectively, the other end of each voltage transformer (3) primary side links to each other with an end of zero sequential potential transformer (4) primary side jointly, and the other end of zero sequential potential transformer (4) primary side links to each other with the earth terminal of mid-dolly car body (1).
2. the contact (51) that the mid-cabinet dolly of antiresonance voltage transformer as claimed in claim 1, each contact arm (5) that it is characterized in that described mid-dolly car body (1) are fixed on the hollow insulated tube (53) on the mid-dolly car body (1) by an end by insulator (6) respectively and are installed in the other end of hollow insulated tube (53) constitutes.
3. the mid-cabinet dolly of antiresonance voltage transformer as claimed in claim 2, it is characterized in that described each fuse (2) is installed in respectively in the contact arm hollow insulated tube (53), an end of each fuse (2) links to each other with terminals (52) on being fixed on insulator (6), the other end links to each other with contact (51).
4. the mid-cabinet dolly of antiresonance voltage transformer as claimed in claim 2 is characterized in that described contact (51) is installed on the hollow insulated tube (53) by screw thread.
5. the mid-cabinet dolly of antiresonance voltage transformer as claimed in claim 1, it is characterized in that described each voltage transformer (3) is installed in the below that mid-dolly car body (1) is gone up the insulator (6) of coupled contact arm (5) respectively, zero sequential potential transformer (4) is installed in below contact arm (5) one sides that mid-dolly car body (1) is gone up each voltage transformer (3).
CN201020583437XU 2010-10-29 2010-10-29 Middle cabinet trolley of anti-resonance potential transformer Expired - Fee Related CN201829854U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201020583437XU CN201829854U (en) 2010-10-29 2010-10-29 Middle cabinet trolley of anti-resonance potential transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201020583437XU CN201829854U (en) 2010-10-29 2010-10-29 Middle cabinet trolley of anti-resonance potential transformer

Publications (1)

Publication Number Publication Date
CN201829854U true CN201829854U (en) 2011-05-11

Family

ID=43968368

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201020583437XU Expired - Fee Related CN201829854U (en) 2010-10-29 2010-10-29 Middle cabinet trolley of anti-resonance potential transformer

Country Status (1)

Country Link
CN (1) CN201829854U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102522712A (en) * 2011-12-11 2012-06-27 长城电器集团有限公司 Power distribution cabinet system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102522712A (en) * 2011-12-11 2012-06-27 长城电器集团有限公司 Power distribution cabinet system

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Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110511

Termination date: 20111029