CN204142392U - Portable transformer winding temperature table tester - Google Patents

Portable transformer winding temperature table tester Download PDF

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Publication number
CN204142392U
CN204142392U CN201420435358.2U CN201420435358U CN204142392U CN 204142392 U CN204142392 U CN 204142392U CN 201420435358 U CN201420435358 U CN 201420435358U CN 204142392 U CN204142392 U CN 204142392U
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CN
China
Prior art keywords
transformer
temperature
fuel tank
winding
electric cabinet
Prior art date
Application number
CN201420435358.2U
Other languages
Chinese (zh)
Inventor
贾炜
张本宇
陷兴
白跃昌
乔斌
孙伟
杨娜
王克胜
张启飞
郝明杰
张慧军
魏丽峰
Original Assignee
国家电网公司
国网山西省电力公司检修分公司
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Application filed by 国家电网公司, 国网山西省电力公司检修分公司 filed Critical 国家电网公司
Priority to CN201420435358.2U priority Critical patent/CN204142392U/en
Application granted granted Critical
Publication of CN204142392U publication Critical patent/CN204142392U/en

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Abstract

The utility model relates to instrument check instrument, is specially portable transformer winding temperature table tester.Solve the problem lacking at present and can carry out the special instrument of field-checking to Transformer Winding thermometer.This tester comprises casing, casing by be divided into hermetically right side be full of the fuel tank of transformer oil and the electric cabinet in left side, the fuel tank upper surface on right side is provided with the insert port for inserting calibrated meter temperature sensor and the thermometer for measuring, showing temperature of oil in transformer, also be provided with the fuel tank temperature sensor with preset temperature knob, preset temperature display window and the contact according to preset temperature action in the fuel tank on right side, in the electric cabinet in left side, be provided with checking circuit.The utility model has filled up the blank of winding temperature table field-checking without special instrument, instrument check can be completed when Overhaul site does not dismantle instrument, it is easy and simple to handle, volume is light and handy, be easy to carry, and can reduce this object cost of overhaul, improves verification efficiency and dirigibility.

Description

Portable transformer winding temperature table tester

Technical field

The utility model relates to instrument check instrument, is specially portable transformer winding temperature table tester.

Background technology

Transformer Winding itself is an electrified body, directly measures winding temperature in insulation processing, has the higher winding of larger difficulty, particularly electric pressure, though adopt optical fiber technology also can realize, cost is higher.So common winding temperature gage is actually professional monitoring (control) instrument of the most hot temperature degree of a kind of applied heat analogue measurement commercial measurement Winding in Power Transformer, so-called thermal simulation measuring technique is on the transformer top-oil temperature T0 basis easily measured, apply the additional temperature rise △ T of a transformer load curent change again, sum of the two T0+△ T can analogue transformer hottest spot temperature thus.

Transformer winding temperature gage principle of work is shown in Fig. 4: winding temperature table is mainly on the basis of an oil thermometer, be equipped with a current transformer 21 and a heating, by the electric current be directly proportional to load that transformer current mutual inductor 22 takes out, after current transformer 21 adjusts, by being inlaid in the heating 23 in flexible member, heating produces heat, and the displacement of flexible member is increased.Therefore, on transformer belt after load, the displacement of flexible member is jointly determined by transformer top-oil temperature (this oil temperature is recorded by the temperature sensor 24 of winding temperature table) and the load current of transformer, and the temperature of transformer winding temperature gage instruction is that transformer top-oil temperature and coil are to the temperature rise sum of oil.

Winding temperature table is the instrument for measuring transformer winding temperature, can intuitive monitoring to the operating condition of transformer, the abnormal conditions for transformer also can carry out early warning work in time, for the safe operation of transformer provides sound assurance.The verification of winding temperature table and line service can guarantee the normal display of winding temperature table and the correct operation of contact, thus real reaction transformer operation conditions.

Verify for winding temperature table, only have manufacturer to have professional tester at present, and set up corresponding laboratory to complete verifying work, its device structure is complicated, bulky, there is significant limitation, its equipment cannot be used to carry out verifying work at Overhaul site.Do not have special instrument can carry out field-checking to winding thermometer at present, so can only find whether instrument exists exception by the temperature data in record comparison day-to-day operation, the method cannot effectively find gauge internal defect, there is very large uncertainty and limitation.

Summary of the invention

The utility model solves the problem lacking at present and can carry out the special instrument of field-checking to Transformer Winding thermometer, provides a kind of portable transformer winding temperature table tester.

The utility model adopts following technical scheme to realize: portable transformer winding temperature table tester, comprise casing, casing by dividing plate be divided into hermetically right side be full of the fuel tank of transformer oil and the electric cabinet in left side, the fuel tank upper surface on right side is provided with the insert port for inserting calibrated meter temperature sensor and the thermometer for measuring, showing temperature of oil in transformer, also be provided with the fuel tank temperature sensor with preset temperature knob, preset temperature display window and the contact J1 according to preset temperature action in the fuel tank on right side, in the electric cabinet in left side, be provided with checking circuit, described checking circuit comprises transformer B, the former limit winding of transformer B is connected with power supply through master switch K1, the winding two ends, secondary limit of transformer B are connected with heater circuit, heater circuit is in series by the contact J1 of the well heater R1 be placed in fuel tank, heater switch K2 and fuel tank temperature sensor, the temperature element of fuel tank temperature sensor is placed in fuel tank, and its preset temperature display window and preset temperature knob are arranged on the panel of electric cabinet, one end of the secondary limit winding of transformer B is connected with the one end measuring K switch 3, the other end measuring K switch 3 is connected with one end of adjustable resistance R2, the other end of adjustable resistance R2 is connected with one end of the first reometer A1, the other end of reometer A1 is connected with the first connection terminal on electric cabinet panel, the other end of secondary limit winding of transformer B is connected with the second connection terminal on electric cabinet panel, checking circuit also comprises the second reometer A2, the two ends of the second reometer A2 are connected with the 4th connection terminal with the 3rd connection terminal on electric cabinet panel respectively, the adjusting knob of adjustable resistance R2 is placed on electric cabinet panel.

The utility model is portable winding temperature table on-site calibrator, fill up the blank of winding temperature table field-checking without special instrument, maintainer can coordinate without the need to manufacturer, instrument check can be completed when Overhaul site does not dismantle instrument, it is easy and simple to handle, volume is light and handy, be easy to carry, significantly can reduce this object cost of overhaul, improve verification efficiency and dirigibility, thus increase transformer reliability of operation.The utility model has very great help to winding thermometer fault diagnosis, strengthens the ability that maintainer processes instrument fault, reaches the object reducing instrument maintenance cost.

Accompanying drawing explanation

Fig. 1 is surface structure schematic diagram of the present utility model;

Fig. 2 is the vertical view of Fig. 1;

Fig. 3 is the circuit theory diagrams of checking circuit;

Fig. 4 is existing transformer winding temperature gage principle of work.

In figure: 1-fuel tank, 2-electric cabinet, 3-insert port, 4-thermometer, 5-preset temperature knob, 6-preset temperature display window, B-transformer, K1-master switch, K2-heater switch, K3-measures switch, R1-well heater, R2-adjustable resistance, J1-contact, A1-first reometer, A2-second reometer, DZ1-first connection terminal, DZ2-second connection terminal, DZ3-the 3rd connection terminal, DZ4-the 4th connection terminal.

Embodiment

Portable transformer winding temperature table tester, comprise casing, casing is divided into the fuel tank 1 being full of transformer oil on right side and the electric cabinet 2 in left side hermetically by dividing plate, fuel tank 1 upper surface on right side is provided with the insert port 3 for inserting calibrated meter temperature sensor and the thermometer 4 for measuring, showing temperature of oil in transformer, also be provided with the fuel tank temperature sensor with preset temperature knob 5, preset temperature display window 6 and the contact J1 according to preset temperature action in the fuel tank 1 on right side, in the electric cabinet 2 in left side, be provided with checking circuit, described checking circuit comprises transformer B, the former limit winding of transformer B is connected with power supply through master switch K1, the winding two ends, secondary limit of transformer B are connected with heater circuit, heater circuit is in series by the contact J1 of the well heater R1 be placed in fuel tank, heater switch K2 and fuel tank temperature sensor, the temperature element of fuel tank temperature sensor is placed in fuel tank, and its preset temperature display window 6 and preset temperature knob 5 are arranged on the panel of electric cabinet, one end of the secondary limit winding of transformer B is connected with the one end measuring K switch 3, the other end measuring K switch 3 is connected with one end of adjustable resistance R2, the other end of adjustable resistance R2 is connected with one end of the first reometer A1, the other end of the first reometer A1 is connected with the first connection terminal DZ1 on electric cabinet panel, the other end of the secondary limit winding of transformer B is connected with the second connection terminal DZ2 on electric cabinet panel, checking circuit also comprises the second reometer A2, the two ends of the second reometer A2 are connected with the 4th connection terminal DZ4 with the 3rd connection terminal DZ3 on electric cabinet panel respectively, the adjusting knob of adjustable resistance R2 is placed on electric cabinet panel.During concrete manufacture, bottom half is provided with roller, convenient mobile.Described is commercially available existing known products on market with preset temperature knob 5, preset temperature display window 6 and the fuel tank temperature sensor according to the contact J1 of preset temperature action.

Operation instruction: first also arrange test fence according to meter location reasonable placement tester, the ground wire that then installs instruments guarantees its reliable ground, and last joint test power supply verifies according to experiment process, and flow process is as follows:

One, winding temperature table does not add temperature-compensated current verification:

1, indicated value and rreturn value verification: tester fuel tank is filled transformer oil heating, will by school winding temperature table input CT(current transformer according to Instrument Note book) connection terminal of electric current disconnects, calibrated meter temperature sensor 24 takes out the insert port 3 of the top of oil-tank inserting tester from transformer, open instrument master switch K1, set fuel tank temperature and (namely set the maximum temperature of fuel tank by revolving the preset temperature knob 5 putting fuel tank temperature sensor, this temperature is shown on preset temperature display window 6) after open heater switch K2, oil heating in well heater R1 oil dropping apparatus.Record thermometer on fuel tank 4 with by school thermometer rising each point temperature value and decline each point temperature value, if each point temperature value is synchronous, qualified, otherwise defective, need correct.In heat temperature raising and recording process, because preset fuel tank temperature is higher, so the contact J1 of fuel tank temperature sensor is in closure state (when only reaching preset temperature, contact J1 just disconnects) always.

Two, winding temperature table current transformer verification

1, the technical data preliminary work must done before verification

(1) determination of input current Ip: transformer need be consulted and to dispatch from the factory data determination transformer voltage ratio K, transformer rated current In, current transformer input current Ip=In/K can be calculated.

(2) determination of output current Is: need consult the transformer data of dispatching from the factory and can draw transformer copper oil temperature difference △ T at rated loads, according to the value of △ T, can be found the value of Is by the heating current in winding temperature table instructions and temperature rise curve or form.

(3) determination of current transformer heating current output wiring terminal; Calculate Is/Ip, then according to the value of Is/Ip, look into the converter topology parameter list in winding temperature table instructions, in can determining that School Affairs runs, the connection terminal that current transformer exports heating current should be connect.

2, current transformer verification

(1) according to Instrument Note book, by winding temperature table CT input current connection terminal by the first connection terminal DZ1 on test wire connection electric cabinet panel and the second connection terminal DZ2; Short-circuit line between current transformer heating current output wiring terminal is taken off by the 3rd connection terminal DZ3 on test wire connection electric cabinet panel and the 4th connection terminal DZ4.

(2) open measurement K switch 3, equal Ip by the electric current regulating adjustable resistance R2 to make reometer A1 show.

(3) check reometer A2, current value and the aforementioned Is current value obtained of display on it are compared, if value has deviation, adjust by regulating current transformer adjusting knob.

Three, winding temperature table heating verification

(1) after current transformer verification, keep test connection constant, will insert the oil tank heating of calibrated meter temperature sensor to assigned temperature, regulate adjustable resistance R2 to make the reading of reometer A1 be Ip.

(2) keep fuel tank steady temperature (when being equal to or higher than preset temperature, contact J1 disconnects, close lower than contact J1 during preset temperature, keep fuel tank steady temperature by the alternately make and break of contact J1) and the reading of reometer A1 be read winding temperature meter reading T and standard thermometer reading T0 after Ip15min, and try to achieve both difference △ T '.

4, check reometer A2 current value now, consult the transformer data of dispatching from the factory and can draw the copper oil temperature difference △ T of transformer under this current value.

5, from winding temperature table principle, △ T ' should with △ T-phase etc., therefore contrast △ T ' should be not more than 2 DEG C with △ T numerical error, if be greater than again adjustment current transformer until meet the requirement of measuring accuracy.

Claims (2)

1. a portable transformer winding temperature table tester, it is characterized in that: comprise casing, casing is divided into the fuel tank (1) being full of transformer oil on right side and the electric cabinet (2) in left side hermetically by dividing plate, fuel tank (1) upper surface on right side is provided with insert port (3) for inserting calibrated meter temperature sensor and for measuring, the thermometer (4) of display temperature of oil in transformer, also be provided with preset temperature knob (5) in the fuel tank (1) on right side, the fuel tank temperature sensor of preset temperature display window (6) and the contact (J1) according to preset temperature action, checking circuit is provided with in the electric cabinet (2) in left side, described checking circuit comprises transformer (B), the former limit winding of transformer (B) is connected with power supply through master switch (K1), the winding two ends, secondary limit of transformer (B) are connected with heater circuit, heater circuit is in series by the contact (J1) of the well heater be placed in fuel tank (R1), heater switch (K2) and fuel tank temperature sensor, the temperature element of fuel tank temperature sensor is placed in fuel tank, and its preset temperature display window (6) and preset temperature knob (5) are arranged on the panel of electric cabinet, one end of the secondary limit winding of transformer (B) is connected with the one end measuring switch (K3), the other end measuring switch (K3) is connected with one end of adjustable resistance (R2), the other end of adjustable resistance (R2) is connected with one end of the first reometer (A1), the other end of the first reometer (A1) is connected with the first connection terminal (DZ1) on electric cabinet panel, the other end of the secondary limit winding of transformer (B) is connected with the second connection terminal (DZ2) on electric cabinet panel, checking circuit also comprises the second reometer (A2), the two ends of the second reometer (A2) are connected with the 4th connection terminal (DZ4) with the 3rd connection terminal (DZ3) on electric cabinet panel respectively, the adjusting knob of adjustable resistance (R2) is placed on electric cabinet panel.
2. portable transformer winding temperature table tester according to claim 1, is characterized in that: bottom half is provided with roller.
CN201420435358.2U 2014-08-04 2014-08-04 Portable transformer winding temperature table tester CN204142392U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420435358.2U CN204142392U (en) 2014-08-04 2014-08-04 Portable transformer winding temperature table tester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420435358.2U CN204142392U (en) 2014-08-04 2014-08-04 Portable transformer winding temperature table tester

Publications (1)

Publication Number Publication Date
CN204142392U true CN204142392U (en) 2015-02-04

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105371989A (en) * 2015-11-03 2016-03-02 云南电网有限责任公司昆明供电局 Pressure type thermometer verification device with simulation test function
CN105424227A (en) * 2015-11-03 2016-03-23 云南电网有限责任公司昆明供电局 Pressure type thermometer verification device capable of simulation test and verification method of device
CN105547524A (en) * 2015-12-30 2016-05-04 中国神华能源股份有限公司 Mining lorry equipment debugging platform
CN106482869A (en) * 2016-11-17 2017-03-08 中国电子科技集团公司第四十研究所 A kind of miniaturization distributed optical fiber temperature measurement caliberating device and scaling method
CN108362402A (en) * 2018-04-02 2018-08-03 广东电网有限责任公司 A kind of winding temperature table copper oil temperature difference simulation test device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105371989A (en) * 2015-11-03 2016-03-02 云南电网有限责任公司昆明供电局 Pressure type thermometer verification device with simulation test function
CN105424227A (en) * 2015-11-03 2016-03-23 云南电网有限责任公司昆明供电局 Pressure type thermometer verification device capable of simulation test and verification method of device
CN105547524A (en) * 2015-12-30 2016-05-04 中国神华能源股份有限公司 Mining lorry equipment debugging platform
CN105547524B (en) * 2015-12-30 2018-12-04 中国神华能源股份有限公司 A kind of mine truck equipment debugging platform
CN106482869A (en) * 2016-11-17 2017-03-08 中国电子科技集团公司第四十研究所 A kind of miniaturization distributed optical fiber temperature measurement caliberating device and scaling method
CN108362402A (en) * 2018-04-02 2018-08-03 广东电网有限责任公司 A kind of winding temperature table copper oil temperature difference simulation test device

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150204

Termination date: 20180804