CN204142777U - Voltage transformer (VT) calibrating termination - Google Patents

Voltage transformer (VT) calibrating termination Download PDF

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Publication number
CN204142777U
CN204142777U CN201420673589.7U CN201420673589U CN204142777U CN 204142777 U CN204142777 U CN 204142777U CN 201420673589 U CN201420673589 U CN 201420673589U CN 204142777 U CN204142777 U CN 204142777U
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CN
China
Prior art keywords
terminal
chip switching
voltage
output wiring
voltage transformer
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.)
Withdrawn - After Issue
Application number
CN201420673589.7U
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Chinese (zh)
Inventor
马永刚
王闵飞
宋杏然
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.)
State Grid Corp of China SGCC
State Grid Hebei Electric Power Co Ltd
Cangzhou Power Supply Co of State Grid Hebei Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
State Grid Hebei Electric Power Co Ltd
Cangzhou Power Supply Co of State Grid Hebei Electric Power Co Ltd
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Filing date
Publication date
Application filed by State Grid Corp of China SGCC, State Grid Hebei Electric Power Co Ltd, Cangzhou Power Supply Co of State Grid Hebei Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201420673589.7U priority Critical patent/CN204142777U/en
Application granted granted Critical
Publication of CN204142777U publication Critical patent/CN204142777U/en
Withdrawn - After Issue legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a kind of voltage transformer (VT) calibrating termination, it is characterized in that: comprise low-voltage distribution box, single-chip switching, monitor voltage table, connection terminal and wire, single-chip switching is loaded in low-voltage distribution box, three input wires terminals of described termination connect tested transformer test terminal, output wiring terminal connects mutual-inductor tester sampling terminal, wherein two output wiring terminal accesses monitor voltage table, damage from surge voltage for protecting mutual-inductor tester during switching circuit, by the break-make of operation single-chip switching during use, switch between three different measuring loops.Apply this device only by a boost process, can complete and many mutual inductors are examined and determine, greatly improve calibration operation efficiency, decrease personnel depaly, reduce the number of times of mounting or dismounting Hi-pot test line, reduce Hi-pot test electrification time, reduce the security risk in process of the test, improve enterprise security benefit.

Description

Voltage transformer (VT) calibrating termination
Technical field
The utility model relates to voltage transformer (VT) Calibration Technology field.
Background technology
The effect of voltage transformer (VT) be high voltage in proportion relation transformation become 100V or more low-grade standard secondary voltage; for protection, metering, metering device; meanwhile, use voltage transformer (VT) high voltage and electrician can be isolated, ensured personal security.Due to above-mentioned functions, voltage transformer (VT) is widely used in generating, the power transmission and distribution field of electric power.When for metering, metering device, in order to measure or instrument numerical value accurate, then must need regularly to do measurement verification to voltage transformer (VT), otherwise its accuracy cannot be ensured, cause false protection, measure mistake etc.In verification process, need to connect AC power, pressure regulator, stepup transformer and standard potential transformer successively, standard potential transformer is connected with tested voltage transformer (VT) again, standard potential transformer is in buck process each time, a tested voltage transformer (VT) can only be examined and determine, and on-the-spot general mutual inductor of often organizing is two to three, need repeatedly to install and remove Hi-pot test line, repeatedly rise high-pressure process, multiple calibration operation personnel are needed to coordinate, the band operation with high pressure time is long, and security risk is high, and calibration operation efficiency is low.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of voltage transformer (VT) calibrating termination, only by a boost process, can complete and examine and determine two or three mutual inductors, greatly improves calibration operation efficiency, reduces security risk.
For solving the problems of the technologies described above, technical solution adopted in the utility model is: a kind of voltage transformer (VT) calibrating termination, it is characterized in that: comprise low-voltage distribution box, single-chip switching, monitor voltage table, connection terminal and wire, single-chip switching is loaded in low-voltage distribution box, first input wires terminal and the second single-chip switching of connecting between the first output wiring terminal, second input wires terminal and the 4th single-chip switching of connecting between the first output wiring terminal, first input wires terminal and the first single-chip switching of connecting between the second output wiring terminal, second input wires terminal and the 3rd single-chip switching of connecting between the second output wiring terminal, serial monitoring voltage table between second output wiring terminal and the 3rd output wiring terminal, described first input wires terminal and the second input wires terminal are used for the secondary wire wrap terminal of connection two accredited voltage transformer (VT) respectively, described first output wiring terminal and the 3rd outlet terminal sub-connection mutual-inductor tester.
When voltage transformer (VT) is examined and determine, AC power, pressure regulator, stepup transformer are connected successively with standard potential transformer, the primary winding of the primary winding of standard potential transformer and two voltage transformer (VT) to be measured is in parallel, standard potential transformer secondary coil x 0end and mutual-inductor tester x hold be connected, standard potential transformer secondary coil a 0the secondary coil a of end, two voltage transformer (VT) to be measured 1end and a 2end is held with a of mutual-inductor tester respectively and is connected, the secondary coil x of voltage transformer (VT) one to be measured 1end connects the first input wires terminal of described termination, the secondary coil x of voltage transformer (VT) two to be measured 2end connects the second input wires terminal of described termination, first output wiring terminal is held with the D of mutual-inductor tester and is connected, 3rd output wiring terminal is held with the K of mutual-inductor tester and is connected, series impedance between the D end of mutual-inductor tester and a end, the single-chip switching of termination is often set to disconnection.Examine and determine voltage transformer (VT) to be measured first to close for the moment the first single-chip switching, voltage table instruction think when being not more than 5% polarity and wiring correct, disconnect the first single-chip switching, close the second single-chip switching, now mutual-inductor tester measuring circuit connects the error can measuring voltage transformer (VT) one to be measured from mutual-inductor tester, disconnects the second single-chip switching after measuring; First close when examining and determine voltage transformer (VT) two to be measured 3rd single-chip switching, voltage table instruction think when being not more than 5% polarity and wiring correct, disconnect the 3rd single-chip switching, close the 4th single-chip switching, now mutual-inductor tester measuring circuit connects the error can measuring voltage transformer (VT) two to be measured from mutual-inductor tester, disconnects the 4th single-chip switching after measuring.
One as the technical program is improved, a kind of voltage transformer (VT) calibrating termination, it is characterized in that: also comprise the 3rd input wires terminal and the 6th single-chip switching of connecting between the first output wiring terminal, 3rd input wires terminal and the 5th single-chip switching of connecting between the second output wiring terminal, the secondary wire wrap terminal of described 3rd input terminal sub-connection the 3rd accredited voltage transformer (VT).
When voltage transformer (VT) is examined and determine, AC power, pressure regulator, stepup transformer are connected successively with standard potential transformer, the primary winding of the primary winding of standard potential transformer and voltage transformer (VT) to be measured is in parallel, standard potential transformer secondary coil x 0end and mutual-inductor tester x hold be connected, standard potential transformer secondary coil a 0the secondary coil a of end, three voltage transformer (VT) to be measured 1end, a 2end and a 3end is held with a of mutual-inductor tester respectively and is connected, the secondary coil x of voltage transformer (VT) one to be measured 1end connects the first input wires terminal of described termination, the secondary coil x of voltage transformer (VT) two to be measured 2end connects the second input wires terminal of described termination, the secondary coil x of voltage transformer (VT) three to be measured 3end connects the 3rd input wires terminal of described termination, first output wiring terminal is held with the D of mutual-inductor tester and is connected, 3rd output wiring terminal is held with the K of mutual-inductor tester and is connected, series impedance between the D end of mutual-inductor tester and a end, the single-chip switching of termination is often set to disconnection.Examine and determine voltage transformer (VT) to be measured first to close for the moment the first single-chip switching, voltage table instruction think when being not more than 5% polarity and wiring correct, disconnect the first single-chip switching, close the second single-chip switching, now mutual-inductor tester measuring circuit connects the error can measuring voltage transformer (VT) one to be measured from mutual-inductor tester, disconnects the second single-chip switching after measuring; First close when examining and determine voltage transformer (VT) two to be measured 3rd single-chip switching, voltage table instruction think when being not more than 5% polarity and wiring correct, disconnect the 3rd single-chip switching, close the 4th single-chip switching, now mutual-inductor tester measuring circuit connects the error can measuring voltage transformer (VT) two to be measured from mutual-inductor tester, disconnects the 4th single-chip switching after measuring; First close when examining and determine voltage transformer (VT) three to be measured 5th single-chip switching, voltage table instruction think when being not more than 5% polarity and wiring correct, disconnect the 5th single-chip switching, close the 6th single-chip switching, now mutual-inductor tester measuring circuit connects the error can measuring voltage transformer (VT) three to be measured from mutual-inductor tester, disconnects the 6th single-chip switching after measuring.
The beneficial effect adopting technique scheme to produce is: apply this device only by a boost process, can complete and many mutual inductors are examined and determine, greatly improve calibration operation efficiency, decrease personnel depaly, reduce the number of times of mounting or dismounting Hi-pot test line, reduce Hi-pot test electrification time, reduce the security risk in process of the test, improve enterprise security benefit.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is circuit diagram of the present utility model.
1, the first single-chip switching; 2, the second single-chip switching; 3, the 3rd single-chip switching; 4, the 4th single-chip switching; 5, the 5th single-chip switching; 6, the 6th single-chip switching; 7, the first input wires terminal; 8, the second input wires terminal; 9, the 3rd input wires terminal; 10, the first output wiring terminal; 11, the second output wiring terminal; 12, the 3rd output wiring terminal; 13, voltage table is monitored; 14, voltage transformer (VT) to be measured; 15, standard potential transformer; 16, stepup transformer; 17, pressure regulator; 18, AC power; 19, mutual-inductor tester; 20, termination;
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Embodiment
Embodiment one
Voltage transformer (VT) calibrating termination, comprise low-voltage distribution box, four single-chip switchings, a supervision voltage table 13, connection terminal and wire, single-chip switching is loaded in low-voltage distribution box, to connect between first input wires terminal 7 with the first output wiring terminal 10 second single-chip switching 2, to connect between second input wires terminal 8 with the first output wiring terminal 10 the 4th single-chip switching 4, to connect between first input wires terminal 7 with the second output wiring terminal 11 first single-chip switching 1, to connect between second input wires terminal 8 with the second output wiring terminal 11 the 3rd single-chip switching 3, serial monitoring voltage table 13 between second output wiring terminal 11 and the 3rd output wiring terminal 12.
When to two voltage transformer (VT) calibratings, AC power 18, pressure regulator 17, stepup transformer 16 are connected successively with standard potential transformer 15, the primary winding of the primary winding of standard potential transformer 15 and two voltage transformer (VT) to be measured is in parallel, standard potential transformer 15 secondary coil x 0end and mutual-inductor tester 19 x hold be connected, standard potential transformer 15 secondary coil a 0the secondary coil a of end, two voltage transformer (VT) to be measured 1end and a 2end is held with a of mutual-inductor tester 19 respectively and is connected, the secondary coil x of voltage transformer (VT) one to be measured 1end connects the first input wires terminal 7 of described termination, the secondary coil x of voltage transformer (VT) two to be measured 2end connects the second input wires terminal 8 of described termination, first output wiring terminal 10 is held with the D of mutual-inductor tester 19 and is connected, 3rd output wiring terminal 12 is held with the K of mutual-inductor tester 19 and is connected, series impedance between the D end of mutual-inductor tester 19 and a end, the single-chip switching of termination is often set to disconnection.Examine and determine voltage transformer (VT) to be measured first to close for the moment the first single-chip switching 1, voltage table instruction think when being not more than 5% polarity and wiring correct, disconnect the first single-chip switching 1, close the second single-chip switching 2, now mutual-inductor tester 19 measuring circuit connects the error can measuring voltage transformer (VT) one to be measured from mutual-inductor tester 19, disconnects the second single-chip switching 2 after measuring; First close when examining and determine voltage transformer (VT) two to be measured 3rd single-chip switching 3, voltage table instruction think when being not more than 5% polarity and wiring correct, disconnect the 3rd single-chip switching 3, close the 4th single-chip switching 4, now mutual-inductor tester 19 measuring circuit connects the error can measuring voltage transformer (VT) two to be measured from mutual-inductor tester 19, disconnects the 4th single-chip switching 4 after measuring.
Embodiment two
One as embodiment one is improved, a kind of voltage transformer (VT) calibrating termination, it is characterized in that: also comprise the 6th single-chip switching 6 of connecting between the 3rd input wires terminal 9 with the first output wiring terminal 10, to connect between 3rd input wires terminal 9 with the second output wiring terminal 11 the 5th single-chip switching 5, described 3rd input wires terminal 9 connects the secondary wire wrap terminal waiting to examine and determine voltage transformer (VT) three, waits the secondary coil a examining and determine voltage transformer (VT) three 3end is held with a of mutual-inductor tester 19 and is connected, the secondary coil x of voltage transformer (VT) three to be measured 3end connects the 3rd input wires terminal 9 of described termination.All the other connected modes are identical with embodiment one.
First close when examining and determine voltage transformer (VT) three to be measured 5th single-chip switching 5, voltage table instruction think when being not more than 5% polarity and wiring correct, disconnect the 5th single-chip switching 5, close the 6th single-chip switching 6, now mutual-inductor tester 19 measuring circuit connects the error can measuring voltage transformer (VT) three to be measured from mutual-inductor tester 19, disconnects the 6th single-chip switching 6 after measuring.

Claims (2)

1. a voltage transformer (VT) calibrating termination, it is characterized in that: comprise low-voltage distribution box, single-chip switching, monitor voltage table (13), connection terminal and wire, single-chip switching is loaded in low-voltage distribution box, first input wires terminal (7) and the second single-chip switching (2) of connecting between the first output wiring terminal (10), second input wires terminal (8) and the 4th single-chip switching (4) of connecting between the first output wiring terminal (10), first input wires terminal (7) and the first single-chip switching (1) of connecting between the second output wiring terminal (11), second input wires terminal (8) and the 3rd single-chip switching (3) of connecting between the second output wiring terminal (11), serial monitoring voltage table between second output wiring terminal (11) and the 3rd output wiring terminal (12), described first input wires terminal (7) and the second input wires terminal (8) are used for the secondary wire wrap terminal of connection two accredited voltage transformer (VT) respectively, described first output wiring terminal (10) is connected mutual-inductor tester with the 3rd output wiring terminal (12).
2. a kind of voltage transformer (VT) calibrating termination according to claim 1, it is characterized in that: also comprise the 3rd input wires terminal (9) and the 6th single-chip switching (6) of connecting between the first output wiring terminal (10), 3rd input wires terminal (9) and the 5th single-chip switching (5) of connecting between the second output wiring terminal (11), described 3rd input wires terminal (9) connects the secondary wire wrap terminal waiting to examine and determine voltage transformer (VT) three.
CN201420673589.7U 2014-11-06 2014-11-06 Voltage transformer (VT) calibrating termination Withdrawn - After Issue CN204142777U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420673589.7U CN204142777U (en) 2014-11-06 2014-11-06 Voltage transformer (VT) calibrating termination

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420673589.7U CN204142777U (en) 2014-11-06 2014-11-06 Voltage transformer (VT) calibrating termination

Publications (1)

Publication Number Publication Date
CN204142777U true CN204142777U (en) 2015-02-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420673589.7U Withdrawn - After Issue CN204142777U (en) 2014-11-06 2014-11-06 Voltage transformer (VT) calibrating termination

Country Status (1)

Country Link
CN (1) CN204142777U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104297532A (en) * 2014-11-06 2015-01-21 国家电网公司 Wiring device for detecting voltage transformer
CN110927649A (en) * 2019-12-02 2020-03-27 云南电网有限责任公司玉溪供电局 Voltage transformer modularization calibrating installation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104297532A (en) * 2014-11-06 2015-01-21 国家电网公司 Wiring device for detecting voltage transformer
CN104297532B (en) * 2014-11-06 2017-03-08 国家电网公司 Voltage transformer calibrating termination
CN110927649A (en) * 2019-12-02 2020-03-27 云南电网有限责任公司玉溪供电局 Voltage transformer modularization calibrating installation

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GR01 Patent grant
C14 Grant of patent or utility model
AV01 Patent right actively abandoned

Granted publication date: 20150204

Effective date of abandoning: 20171114

AV01 Patent right actively abandoned