CN201885830U - Field checking instrument for transformer thermometer - Google Patents
Field checking instrument for transformer thermometer Download PDFInfo
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- CN201885830U CN201885830U CN2010206454575U CN201020645457U CN201885830U CN 201885830 U CN201885830 U CN 201885830U CN 2010206454575 U CN2010206454575 U CN 2010206454575U CN 201020645457 U CN201020645457 U CN 201020645457U CN 201885830 U CN201885830 U CN 201885830U
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Abstract
The utility model discloses a field checking instrument for a transformer thermometer, which comprises a heating box, a cooling box, an oil pump, a semiconductor heater, an oil-temperature controller, a liquid-level sensor and a control circuit; the upper part and the lower part of the lateral wall of the heating box are respectively communicated with the upper part and the lower part of the lateral wall of the cooling box through pipelines, and the oil pump is installed in a lower pipeline; the semiconductor heater is installed between the heating box and the cooling box; one end of a temperature-sensing pipe is fixed at the top of the heating box, and the other end of the temperature-sensing pipe is inserted inside the heating box; an inserting hole for inserting a thermocouple of the transformer thermometer is arranged at the top of the heating box; the liquid-level sensor is arranged on the inner lateral wall of the heating box and positioned below an upper pipeline; and the control circuit comprises a liquid-level control circuit, a starting/stopping equipment circuit, a heating/cooling selecting circuit and a detecting circuit. The field checking instrument is convenient to carry, simple to operate and accurate to test, the field checking of the transformer thermometer is realized, and the safe and reliable operation of a transformer is ensured.
Description
Technical field
The utility model relates to a kind of instrument check equipment, especially relates to a kind of transformer thermometer on-site calibrator.
Background technology
Operating transformer, its temperature have determined the size of transformer load ability, have influenced the length of transformer life.6 degree rules according to transformer: transformer is surpassing long-time running under the situation of temperature limit, every rising 6 degree, and shorten half the serviceable life of transformer.Therefore, temperature is the greatest factor of decision high-power transformer safe and reliable operation.Transformer reaches uniform temperature (just each contact of transformer thermometer is operated corresponding to various coolings), will change according to each contact of thermometer to open oil pump, blower fan, and transformer is lowered the temperature.Therefore, need regularly the thermometer of transformer is carried out verification, guaranteeing the temperature indicating correct of transformer, and guarantee that each temperature contact action is correct.
But, owing to do not have field-checking equipment at present, when transformer is safeguarded, whether the temperature indicating correct of transformer, can only rule of thumb judge, to such an extent as to can its each temperature contact can't be determined by correct operation at all by the indication situation of range estimation thermometer.Therefore, can not guarantee whether the thermometer of transformer is good, also just can not accurately grasp the true temperature of transformer, and then can not guarantee that oil pump and reliable startup of blower fan reduce the transformer temperature, will have influence on the safe and reliable operation of transformer like this.
The utility model content
The technical problems to be solved in the utility model provides a kind of transformer thermometer on-site calibrator, has easy to carry, simple to operate, characteristic of accurate test, has realized the field-checking of transformer thermometer, guarantees safety, the reliability service of transformer.
For solving the problems of the technologies described above, technical solution adopted in the utility model is: a kind of transformer thermometer on-site calibrator, and it comprises heating cabinet, cooling tank, oil pump, semiconductor heat booster, oily temperature controller, liquid level sensor and control circuit; Described control circuit comprises liquid level control circuit, startup/arrestment circuit, warm up/down selection circuit and testing circuit; The top of the sidewall of described heating cabinet, bottom are communicated with top, the bottom of the sidewall of cooling tank by pipeline respectively, and wherein, described lower pipeline is equipped with oil pump; Described semiconductor heat booster is installed between heating cabinet and the cooling tank, and is close to the sidewall of heating cabinet and cooling tank respectively; One end of the temperature-sensitive pipe of described oily temperature controller is fixed on the top of heating cabinet, and its other end inserts the inside of heating cabinet; The top of described heating cabinet is provided with the jack for the thermopair insertion of transformer thermometer; Described liquid level sensor is arranged on the madial wall of heating cabinet, and is positioned at the below of described upper pipe; The input end of the output termination liquid level control circuit of described liquid level sensor, the input end of the output termination startup/arrestment circuit of described liquid level control circuit, the output terminal of described startup/arrestment circuit connects the respective input of oily temperature controller, warm up/down selection circuit respectively, the output termination warm up/down of described oily temperature controller is selected the input end of circuit, the output terminal of described warm up/down selection circuit connects the respective input of oil pump, semiconductor heat booster, the input end of the output termination testing circuit of described thermopair respectively.
Adopt the beneficial effect that technique scheme produced to be:
Store in heating cabinet and the cooling tank with transformer in use identical transformer oil, utilize well heater that heating cabinet is heated, real simulated goes out the environment of transformer actual motion, and the thermopair that inserts transformer thermometer is wherein carried out verification; The semiconductor heat booster heating of can switching on can be transmitted heat again during outage between heating cabinet and cooling tank, reach cool effect; Utilize oil pump that hot and cold transformer oil is mixed, the transformer oil in the heating cabinet is lowered the temperature rapidly, thereby make tester can carry out operation rapidly, continuously.The utlity model has the characteristics that volume is little, simple to operate, easy to carry, test is accurate, practical, can conveniently finish the reliability verification of thermometer in the transformer working site, solved the problem of leaving over for many years in the Repair of Transformer work, significant to the safe and reliable operation that guarantees transformer.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is control circuit figure of the present utility model;
Among the figure: 1, heating cabinet, 2, cooling tank, 3, oil pump, 4, semiconductor heat booster, 5, oily temperature controller, the temperature-sensitive pipe of 5-1, oily temperature controller, 6, the transformer thermometer, 6-1, thermopair, 7, liquid level sensor.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
A kind of transformer thermometer on-site calibrator as shown in Figure 1, it comprises heating cabinet 1, cooling tank 2, oil pump 3, semiconductor heat booster 4, oily temperature controller 5, liquid level sensor 7 and control circuit; Described control circuit comprises liquid level control circuit, startup/arrestment circuit, warm up/down selection circuit and testing circuit; The top of the sidewall of described heating cabinet 1, bottom are communicated with top, the bottom of the sidewall of cooling tank 2 by pipeline respectively, and wherein, described lower pipeline is equipped with oil pump 3; Described semiconductor heat booster 4 is installed between heating cabinet 1 and the cooling tank 2, and is close to the sidewall of heating cabinet 1 and cooling tank 2 respectively; The end of the temperature-sensitive pipe 5-1 of described oily temperature controller 5 is fixed on the top of heating cabinet 1, and its other end inserts the inside of heating cabinet 1; The top of described heating cabinet 1 is provided with the jack for the thermopair 6-1 insertion of transformer thermometer; Described liquid level sensor 7 is arranged on the madial wall of heating cabinet 1, and is positioned at the below of described upper pipe; The input end of the output termination liquid level control circuit of described liquid level sensor 7, the input end of the output termination startup/arrestment circuit of described liquid level control circuit, the output terminal of described startup/arrestment circuit connects the respective input of oily temperature controller 5, warm up/down selection circuit respectively, the output termination warm up/down of described oily temperature controller 5 is selected the input end of circuit, the output terminal of described warm up/down selection circuit connects the respective input of oil pump 3, semiconductor heat booster 4, the input end of the output termination testing circuit of described thermopair 6-1 respectively.
Described heating cabinet 1 and cooling tank 2 all adopt the thick copper plate of 2mm to make.
Described oil pump 3 is a miniature circulating pump, and described oily temperature controller 5 is the digital display temperature controller, and described liquid level sensor 7 is a tongue tube.
As shown in Figure 2, described liquid level control circuit comprises triode Q1, resistance R 1-R2; 1 end of described tongue tube G1 is through resistance R 2 ground connection, the base stage of the 2 termination triode Q1 of described tongue tube G1, and the grounded emitter of described triode Q1, described resistance R 1 is connected between the base stage of voltage VCC and triode Q1.
Described startup/arrestment circuit comprises starting switch AN1, shutdown switch AN2, the first time base circuit U1A, capacitor C 1-C2, electrochemical capacitor E1, resistance R 3-R6, resistance R 27, diode D1 and relay K 1; The 2 end ground connection of described starting switch AN1,6 pin of its 1 termination first time base circuit U1A; The 1 termination voltage VCC of described shutdown switch AN2,2 pin of its 2 termination first time base circuit U1A; 2 pin of the described first time base circuit U1A, 3 pin, 6 pin are respectively through resistance R 4, capacitor C 2, capacitor C 1 ground connection, 4 pin of the described first time base circuit U1A meet voltage VCC through resistance R 6, R5 successively, the collector connecting resistance R5 of described triode Q1 and the node of resistance R 6,14 pin of the described first time base circuit U1A meet voltage VCC through resistance R 27; Described resistance R 3 is connected between 6 pin of voltage VCC and time base circuit U1A, described electrochemical capacitor E1 is connected between 14 pin and 2 pin of the first time base circuit U1A, be connected on behind the coils from parallel connection of coils of described diode D1 and relay K 1 between 5 pin and ground of the first time base circuit U1A, the swing arm of the contact K1-1 of described relay K 1 meets voltage VCC, 1 end of its A termination digital display temperature controller TC.
Described warm up/down selects circuit to comprise warm up/down switch AN3, the second time base circuit U1B, capacitor C 3-C4, electrochemical capacitor E2, resistance R 8-R10, diode D2-D4 and relay K 2-K4; 8 pin of 1 termination, the second time base circuit U1B of described warm up/down switch AN3, its 2 end is through electrochemical capacitor E2 ground connection; Be connected on after described resistance R 8 and capacitor C 3 are in parallel between 8 pin of 14 pin of the first time base circuit U1A and the second time base circuit U1B, 8 pin of the described second time base circuit U1B, 11 pin are respectively through resistance R 9, capacitor C 4 ground connection, 9 pin of the described second time base circuit U1B connect 2 ends of warm up/down switch AN3 through resistance R 10, its 10 pin connects 14 pin of the first time base circuit U1A, and 12 pin of the described second time base circuit U1B link to each other with 8 pin; Be connected on behind the coils from parallel connection of coils of described diode D2 and relay K 2 between 9 pin and ground of the second time base circuit U1B, the swing arm of the contact K2-1 of described relay K 2 connects 3 ends of digital display temperature controller TC, the swing arm of the contact K2-2 of described relay K 2 connects 2 ends of digital display temperature controller TC, be connected on behind the coils from parallel connection of coils of described diode D3 and relay K 3 between the A end and ground of contact K2-1 of relay K 2, the swing arm of the contact K3-1 of described relay K 3 is succeeded the B end of the contact K4-1 of electrical equipment K4, and its A end is through miniature circulating pump M1 ground connection; Be connected on behind the coils from parallel connection of coils of described diode D4 and relay K 4 between the B end and ground of contact K2-2 of relay K 2, the swing arm of the contact K4-1 of described relay K 4 meets voltage VCC, and its A end is through semiconductor heat booster SH ground connection.
Described testing circuit comprises operational amplifier U2, resistance R 12-R20, potentiometer RW, diode D5, needle dc voltmeter VT and warning circuit; Described warning circuit comprises 4-2 input nand gate U3, resistance R 23, resistance R 24, triode Q3, potentiometer VR1, VR2 and hummer LS; Be connected between voltage VCC and the ground after the described resistance R 12-R15 series connection, described thermopair 6-1 is expressed as resistance R C in circuit, and it is in parallel with resistance R 13, described potentiometer RW is in parallel with resistance R 14, its swing arm connects reverse input end 2 pin of operational amplifier U2, positive input 3 pin of described operational amplifier U2 meet voltage VCC through resistance R 16, and output terminal 6 pin of described operational amplifier U2 connect its reverse input end through resistance R 18; Described resistance R 17 is connected between positive input 3 pin and ground of operational amplifier U2, described resistance R 19 is connected between output terminal 6 pin and voltage VCC of operational amplifier U2, described resistance R 20 be connected between output terminal 6 pin and ground of operational amplifier U2 after needle dc voltmeter VT is in parallel; End after described potentiometer VR1, the VR2 parallel connection connects output terminal 6 pin of operational amplifier U2, its other end ground connection through diode D5; 1 pin of described 4-2 input nand gate U3 and 2 pin and connect after connect the swing arm of potentiometer VR2,8 pin of described 4-2 input nand gate U3 and 9 pin and connect after connect the swing arm of potentiometer VR1,5 pin of described 4-2 input nand gate U3 and 6 pin and connect after connect its 3 pin, 12 pin of described 4-2 input nand gate U3 connect 10 pin, described 4-2 input nand gate U3 13 pin connect 4 pin, 11 pin of described 4-2 input nand gate U3 connect the base stage of triode Q3 through resistance R 23, the grounded emitter of described triode Q3, described hummer LS is connected between the collector of the B end of contact K3-1 of relay K 3 and triode Q3, and described resistance R 24 is connected between the base stage and ground of triode Q3.
Principle of work of the present utility model is as follows:
Power supply adopts the S250-12v12A Switching Power Supply, changes civil power 220V alternating current into 12v direct current that control circuit needs.The startup of control circuit/arrestment circuit and warm up/down select circuit to be made up of the first time base circuit U1A of dual time base circuit NE556N inside and the second time base circuit U1B and peripheral component separately respectively.
Tongue tube G1 is close on the madial wall of heating cabinet 1, and is positioned at the below of upper pipe, realizes the liquid level monitoring of transformer oil.Be placed with floatable electromagnetic block on the liquid level of the transformer oil in the heating cabinet 1, oil level is crossed when hanging down, tester can not start, temperature-sensitive pipe 5-1 and thermopair 6 can not fully immerse transformer oil when preventing the serious oil starvation of heating cabinet 1, problems such as temperature element and thermometric are inaccurate occur burning, have only when oil level rises to the position of tongue tube G1 contact, the contact adhesive energising of tongue tube G1, when pressing " startup " button AN1, the first time base circuit U1A is triggered, and tester is started working.
Starting or stoping of startup/arrestment circuit control test instrument.Press " startup " button AN1, relay K 1 gets electric adhesive, and direct current 12V begins to power to digital display temperature controller TC; By " stopping " button AN2, relay K 1 dead electricity discharges, and the 12V power supply is cut off, and heating and cooling all can not start.
Warm up/down selection circuit both can have been controlled semiconductor heat booster SH heating cabinet 1 had been heated, and also can control miniature circulating pump M1 simultaneously cryogenic transformer oil and the high temperature transformer oil in the heating cabinet 1 in the cooling tank 2 are mixed, and reached the purpose of cooling.After tester starts, whenever press once " warm up/down " button AN3, the heating of tester or the counter-rotating of cooling state are once.
The temperature of heating cabinet 1 when heated condition, preestablishes temperature required by the control of digital display temperature controller; Press once " warm up/down " button AN3 then, the contact K2-2 of relay K 2 gets electric adhesive, 1 end of digital display temperature controller and 2 end adhesives, direct current 12V voltage is given the coil power supply of relay K 4 by the contact K1-1 of relay K 1, the contact K4-1 of relay K 4 gets electric adhesive, semiconductor heat booster H1 energising is heated heating cabinet 1; When being heated to the design temperature of digital display temperature controller, 1 end of digital display temperature controller and 2 ends disconnect, and direct current 12V voltage stops the coil power supply to relay K 4, and the contact K4-1 dead electricity of relay K 4 discharges, and heated condition stops automatically.
When needs are lowered the temperature, the digital display temperature controller is set temperature required, press once " warm up/down " button AN3 then, the contact K2-1 of relay K 2 gets electric adhesive, 1 end of digital display temperature controller and 3 end adhesives, direct current 12V voltage is given the coil power supply of relay K 3 by the contact K1-1 of relay K 1, the contact K3-1 of relay K 3 gets electric adhesive, the miniature circulating pump M1 running of switching on, cryogenic transformer oil in the cooling tank 2 mixes with the high temperature transformer oil in the heating cabinet 1, and the volume of the transformer oil that stores in the common cooling tank 2 is 3-4 times in the heating cabinet 1; Simultaneously, well heater uses is arranged on semiconductor heat booster H1 between heating cabinet 1 and the cooling tank 2, though cut off the power supply, itself can be delivered to cooling tank 2 from heating cabinet 1 with heat, so the oil temperature in the heating cabinet 1 reduces rapidly, for verification is next time got ready.When oily temperature drop during to design temperature, 1 end of digital display temperature controller and 3 ends disconnect, and the cooling state stops automatically.
During transformer oil heat temperature raising in the heating cabinet 1, the thermopair 6-1 of transformer thermometer 6 immerses in the transformer oil by the jack at heating cabinet 1 top, because thermopair RC presents different resistance values under different temperatures, chip LM741N converts the small resistance variations of thermopair 6-1 to less than 10V d. c. voltage signal, VT reflects intuitively by needle dc voltmeter, when the resistance variations of thermopair 6-1 not in normal range, driving hummer LS by warning circuit reports to the police, whether by the reading of observation needle dc voltmeter VT and the buzzer warning of warning circuit, just can judge tested thermopair 6 has fault; Simultaneously, check the consistance of transformer thermometer 6 indicated temperatures and temperature controller displays temperature, can realize the verification of transformer thermometer.Finish verification to the transformer thermometer.Press once " warm up/down " button AN3 at last again, stop heating.
Claims (7)
1. a transformer thermometer on-site calibrator is characterized in that it comprises heating cabinet (1), cooling tank (2), oil pump (3), semiconductor heat booster (4), oily temperature controller (5), liquid level sensor (7) and control circuit; Described control circuit comprises liquid level control circuit, startup/arrestment circuit, warm up/down selection circuit and testing circuit;
The top of the sidewall of described heating cabinet (1), bottom are communicated with by top, the bottom of pipeline with the sidewall of cooling tank (2) respectively, and wherein, described lower pipeline is equipped with oil pump (3); Described semiconductor heat booster (4) is installed between heating cabinet (1) and the cooling tank (2), and is close to the sidewall of heating cabinet (1) and cooling tank (2) respectively; One end of the temperature-sensitive pipe (5-1) of described oily temperature controller (5) is fixed on the top of heating cabinet (1), and its other end inserts the inside of heating cabinet (1); The top of described heating cabinet (1) is provided with the jack for thermopair (6-1) insertion of transformer thermometer (6); Described liquid level sensor (7) is arranged on the madial wall of heating cabinet (1), and is positioned at the below of described upper pipe;
The input end of the output termination liquid level control circuit of described liquid level sensor (7), the input end of the output termination startup/arrestment circuit of described liquid level control circuit, the output terminal of described startup/arrestment circuit connects oily temperature controller (5) respectively, warm up/down is selected the respective input of circuit, the output termination warm up/down of described oily temperature controller (5) is selected the input end of circuit, described warm up/down selects the output terminal of circuit to connect oil pump (3) respectively, the respective input of semiconductor heat booster (4), the input end of the output termination testing circuit of described thermopair (6-1).
2. a kind of transformer thermometer on-site calibrator according to claim 1 is characterized in that described heating cabinet (1) and cooling tank (2) all adopt the thick copper plate of 2mm to make.
3. a kind of transformer thermometer on-site calibrator according to claim 2 is characterized in that described oil pump (3) is a miniature circulating pump, and described oily temperature controller (5) is the digital display temperature controller, and described liquid level sensor (7) is a tongue tube.
4. a kind of transformer thermometer on-site calibrator according to claim 3 is characterized in that described liquid level control circuit comprises triode Q1, resistance R 1-R2;
1 end of described tongue tube G1 is through resistance R 2 ground connection, the base stage of the 2 termination triode Q1 of described tongue tube G1, and the grounded emitter of described triode Q1, described resistance R 1 is connected between the base stage of voltage VCC and triode Q1.
5. a kind of transformer thermometer on-site calibrator according to claim 4 is characterized in that described startup/arrestment circuit comprises starting switch AN1, shutdown switch AN2, the first time base circuit U1A, capacitor C 1-C2, electrochemical capacitor E1, resistance R 3-R6, resistance R 27, diode D1 and relay K 1;
The 2 end ground connection of described starting switch AN1,6 pin of its 1 termination first time base circuit U1A; The 1 termination voltage VCC of described shutdown switch AN2,2 pin of its 2 termination first time base circuit U1A; 2 pin of the described first time base circuit U1A, 3 pin, 6 pin are respectively through resistance R 4, capacitor C 2, capacitor C 1 ground connection, 4 pin of the described first time base circuit U1A meet voltage VCC through resistance R 6, R5 successively, the collector connecting resistance R5 of described triode Q1 and the node of resistance R 6,14 pin of the described first time base circuit U1A meet voltage VCC through resistance R 27; Described resistance R 3 is connected between 6 pin of voltage VCC and time base circuit U1A, described electrochemical capacitor E1 is connected between 14 pin and 2 pin of the first time base circuit U1A, be connected on behind the coils from parallel connection of coils of described diode D1 and relay K 1 between 5 pin and ground of the first time base circuit U1A, the swing arm of the contact K1-1 of described relay K 1 meets voltage VCC, 1 end of its A termination digital display temperature controller TC.
6. a kind of transformer thermometer on-site calibrator according to claim 5 is characterized in that described warm up/down selection circuit comprises warm up/down switch AN3, the second time base circuit U1B, capacitor C 3-C4, electrochemical capacitor E2, resistance R 8-R10, diode D2-D4 and relay K 2-K4;
8 pin of 1 termination, the second time base circuit U1B of described warm up/down switch AN3, its 2 end is through electrochemical capacitor E2 ground connection; Be connected on after described resistance R 8 and capacitor C 3 are in parallel between 8 pin of 14 pin of the first time base circuit U1A and the second time base circuit U1B, 8 pin of the described second time base circuit U1B, 11 pin are respectively through resistance R 9, capacitor C 4 ground connection, 9 pin of the described second time base circuit U1B connect 2 ends of warm up/down switch AN3 through resistance R 10, its 10 pin connects 14 pin of the first time base circuit U1A, and 12 pin of the described second time base circuit U1B link to each other with 8 pin; Be connected on behind the coils from parallel connection of coils of described diode D2 and relay K 2 between 9 pin and ground of the second time base circuit U1B, the swing arm of the contact K2-1 of described relay K 2 connects 3 ends of digital display temperature controller TC, the swing arm of the contact K2-2 of described relay K 2 connects 2 ends of digital display temperature controller TC, be connected on behind the coils from parallel connection of coils of described diode D3 and relay K 3 between the A end and ground of contact K2-1 of relay K 2, the swing arm of the contact K3-1 of described relay K 3 is succeeded the B end of the contact K4-1 of electrical equipment K4, and its A end is through miniature circulating pump M1 ground connection; Be connected on behind the coils from parallel connection of coils of described diode D4 and relay K 4 between the B end and ground of contact K2-2 of relay K 2, the swing arm of the contact K4-1 of described relay K 4 meets voltage VCC, and its A end is through semiconductor heat booster SH ground connection.
7. a kind of transformer thermometer on-site calibrator according to claim 6 is characterized in that described testing circuit comprises operational amplifier U2, resistance R 12-R20, potentiometer RW, diode D5, needle dc voltmeter VT and warning circuit; Described warning circuit comprises 4-2 input nand gate U3, resistance R 23, resistance R 24, triode Q3, potentiometer VR1, VR2 and hummer LS;
Be connected between voltage VCC and the ground after the described resistance R 12-R15 series connection, described thermopair RC is in parallel with resistance R 13, described potentiometer RW is in parallel with resistance R 14, its swing arm connects reverse input end 2 pin of operational amplifier U2, positive input 3 pin of described operational amplifier U2 meet voltage VCC through resistance R 16, and output terminal 6 pin of described operational amplifier U2 connect its reverse input end through resistance R 18; Described resistance R 17 is connected between positive input 3 pin and ground of operational amplifier U2, described resistance R 19 is connected between output terminal 6 pin and voltage VCC of operational amplifier U2, described resistance R 20 be connected between output terminal 6 pin and ground of operational amplifier U2 after needle dc voltmeter VT is in parallel; End after described potentiometer VR1, the VR2 parallel connection connects output terminal 6 pin of operational amplifier U2, its other end ground connection through diode D5; 1 pin of described 4-2 input nand gate U3 and 2 pin and connect after connect the swing arm of potentiometer VR2,8 pin of described 4-2 input nand gate U3 and 9 pin and connect after connect the swing arm of potentiometer VR1,5 pin of described 4-2 input nand gate U3 and 6 pin and connect after connect its 3 pin, 12 pin of described 4-2 input nand gate U3 connect 10 pin, described 4-2 input nand gate U3 13 pin connect 4 pin, 11 pin of described 4-2 input nand gate U3 connect the base stage of triode Q3 through resistance R 23, the grounded emitter of described triode Q3, described hummer LS is connected between the collector of the B end of contact K3-1 of relay K 3 and triode Q3, and described resistance R 24 is connected between the base stage and ground of triode Q3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206454575U CN201885830U (en) | 2010-12-07 | 2010-12-07 | Field checking instrument for transformer thermometer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206454575U CN201885830U (en) | 2010-12-07 | 2010-12-07 | Field checking instrument for transformer thermometer |
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| CN201885830U true CN201885830U (en) | 2011-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010206454575U Expired - Fee Related CN201885830U (en) | 2010-12-07 | 2010-12-07 | Field checking instrument for transformer thermometer |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998027A (en) * | 2012-12-12 | 2013-03-27 | 保定供电公司 | Transformer temperature check and test device and method for checking faults of temperature control system |
| CN103148965A (en) * | 2013-02-26 | 2013-06-12 | 广东电网公司电力科学研究院 | Temperature rise characteristic field testing method of thermal simulation device of transformer winding temperature controller |
| CN103364110A (en) * | 2012-03-31 | 2013-10-23 | 绥化电业局 | Method for comprehensively calibrating high-voltage transformer body and remote temperature measurement used thermometer |
| CN105675172A (en) * | 2016-04-11 | 2016-06-15 | 国网黑龙江省电力有限公司牡丹江供电公司 | Verification device for thermometer of transformer |
| CN107219023A (en) * | 2017-07-14 | 2017-09-29 | 国网福建省电力有限公司 | A kind of transformer oil surface thermometer intelligent online check analysis system |
| CN108871621A (en) * | 2018-06-29 | 2018-11-23 | 国网湖北省电力有限公司孝感供电公司 | A kind of substation's pointer-type main transformer temperature system failure detection method and device |
| CN111580017A (en) * | 2020-06-01 | 2020-08-25 | 哈尔滨理工大学 | Transformer electric-heat combined simulation experiment device based on wide-range gradient temperature field |
| CN111765991A (en) * | 2020-06-18 | 2020-10-13 | 国家电网有限公司 | Pressure type main transformer thermometer indicating and checking device |
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2010
- 2010-12-07 CN CN2010206454575U patent/CN201885830U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103364110A (en) * | 2012-03-31 | 2013-10-23 | 绥化电业局 | Method for comprehensively calibrating high-voltage transformer body and remote temperature measurement used thermometer |
| CN102998027A (en) * | 2012-12-12 | 2013-03-27 | 保定供电公司 | Transformer temperature check and test device and method for checking faults of temperature control system |
| CN103148965A (en) * | 2013-02-26 | 2013-06-12 | 广东电网公司电力科学研究院 | Temperature rise characteristic field testing method of thermal simulation device of transformer winding temperature controller |
| CN103148965B (en) * | 2013-02-26 | 2015-03-18 | 广东电网公司电力科学研究院 | Temperature rise characteristic field testing method of thermal simulation device of transformer winding temperature controller |
| CN105675172A (en) * | 2016-04-11 | 2016-06-15 | 国网黑龙江省电力有限公司牡丹江供电公司 | Verification device for thermometer of transformer |
| CN107219023A (en) * | 2017-07-14 | 2017-09-29 | 国网福建省电力有限公司 | A kind of transformer oil surface thermometer intelligent online check analysis system |
| CN108871621A (en) * | 2018-06-29 | 2018-11-23 | 国网湖北省电力有限公司孝感供电公司 | A kind of substation's pointer-type main transformer temperature system failure detection method and device |
| CN111580017A (en) * | 2020-06-01 | 2020-08-25 | 哈尔滨理工大学 | Transformer electric-heat combined simulation experiment device based on wide-range gradient temperature field |
| CN111765991A (en) * | 2020-06-18 | 2020-10-13 | 国家电网有限公司 | Pressure type main transformer thermometer indicating and checking device |
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