技术领域Technical field
本发明属于变压器试验设备技术领域，尤其涉及一种变压器直流电阻试验接线转换盒。The invention belongs to the technical field of transformer testing equipment, and in particular relates to a transformer DC resistance test wiring conversion box.
背景技术Background technique
变压器是电力系统中一种主要的电气设备，对其进行定期的试验和维护是变电检修的主要工作之一，特别是通过测量变压器绕组连通套管的直流电阻，可以检查绕组内部导线接头的焊接质量、引线与绕组接头的焊接质量、电压分接开关各个分接位置与套管的接触是否良好、并联支路连接是否正确、变压器载流部分有无断路、接触不良以及绕组有无短路故障等。The transformer is a major electrical equipment in the power system. Regular testing and maintenance of the transformer is one of the main tasks of substation maintenance. In particular, by measuring the DC resistance of the transformer winding connected to the bushing, the conductor joints inside the winding can be checked. Welding quality, welding quality of lead and winding joints, whether the contact between each tap position of the voltage tap changer and the bushing is good, whether the parallel branch connection is correct, whether there is an open circuit or poor contact in the current-carrying part of the transformer, and whether there is a short circuit fault in the winding wait.
在使用传统方法对变压器进行直流电阻试验时，试验人员需穿戴安全带爬上变压器，将安全带挂钩挂在牢固架构上，然后对高压侧A相绕组进行试验接线；待该项直流电阻测量工作结束，试验人员重复上述操作，依次测量高压侧B、C相和低压侧A、B、C相绕组和直流电阻。整个操作过程中，试验人员需反复至少6次攀登变压器进行接线、换线，不仅费工费时，而且存在坠落和触电等安全隐患。When using traditional methods to conduct DC resistance tests on transformers, testers need to wear safety belts to climb up the transformer, hang the safety belt hooks on the solid structure, and then perform test wiring on the high-voltage side A-phase winding; after the DC resistance measurement work At the end, the tester repeated the above operation and measured the high-voltage side B and C phases and the low-voltage side A, B and C phase windings and DC resistance. During the entire operation, the test personnel had to climb the transformer at least six times to perform wiring and replacement. This was not only labor-intensive and time-consuming, but also posed safety risks such as falling and electric shock.
发明内容Contents of the invention
本发明要解决的技术问题是针对上述现有技术的不足，提供一种变压器直流电阻试验接线转换盒，解决传统变压器直流电阻测试过程中，需反复攀登变压器进行高空接线、换线工作等问题。通过采用变压器直流电阻试验接线转换盒，可将高空接线、换线工作转移至地面进行，仅攀登一次变压器即可完成全部接线，降低了试验人员高空作业的次数和风险；而且可通过转换开关实现高、低压侧三相绕组试验接线的自动切换，避免了反复接线、换线工作，有效缩短了试验时间，提高了工作效率。The technical problem to be solved by the present invention is to provide a transformer DC resistance test wiring conversion box in view of the above-mentioned deficiencies in the prior art, which solves the problem of repeatedly climbing the transformer to perform high-altitude wiring and line changing work during the traditional transformer DC resistance test process. By using the transformer DC resistance test wiring conversion box, the high-altitude wiring and wiring work can be transferred to the ground. All wiring can be completed by climbing the transformer only once, reducing the number and risk of high-altitude operations for testers; and it can be achieved through a transfer switch The automatic switching of the high- and low-voltage side three-phase winding test wiring avoids repeated wiring and line changes, effectively shortens the test time and improves work efficiency.
为解决上述技术问题，本发明所采取的技术方案是：In order to solve the above technical problems, the technical solutions adopted by the present invention are:
提供一种变压器直流电阻试验接线转换盒，其特征在于，所述转换盒正面为矩形测试面板，包括：设备区、仪器区和操作区；A transformer DC resistance test wiring conversion box is provided, which is characterized in that the front of the conversion box is a rectangular test panel, including: an equipment area, an instrument area and an operation area;
所述设备区内设有与变压器同名接线柱相连接的电流、电压接线端子，用于与变压器同名接线柱连接；The equipment area is equipped with current and voltage terminal blocks connected to the terminals of the same name of the transformer for connection to the terminals of the same name of the transformer;
所述仪器区内设有与实验仪器同名接线端子相连接的电流、电压接线端子，用于与试验仪器同名接线端子连接；The instrument area is provided with current and voltage terminals connected to the terminals of the same name of the experimental instrument for connection to the terminals of the same name of the experimental instrument;
所述操作区内设有转换开关，用于实现档位选择和试验电路的切换；There is a transfer switch in the operation area, which is used to realize gear selection and test circuit switching;
所述设备区和仪器区内的电流、电压接线端子，在所述转换盒本体内部，通过所述转换开关控制的试验电路与所述操作区电连接。The current and voltage terminals in the equipment area and instrument area are electrically connected to the operation area through the test circuit controlled by the transfer switch inside the conversion box body.
优选地，转换盒还包括接线装置，所述接线装置包括线缆、夹持部件和插拔式部件，所述夹持部件与变压器接线柱连接，所述插拔式部件与所述设备区内的电流、电压接线端子连接，所述夹持部件与所述插拔式部件通过所述线缆固定连接。Preferably, the conversion box further includes a wiring device, which includes a cable, a clamping component and a plug-in component. The clamping component is connected to the transformer terminal, and the plug-in component is connected to the equipment area. The current and voltage terminals are connected, and the clamping component and the plug-in component are fixedly connected through the cable.
优选地，夹持部件包括两个夹头本体、穿装固定两夹头本体的转动连接轴，转动连接轴内部穿装有弹性件，所述夹头前端内侧设有锯齿，夹头手持部设有绝缘护套。Preferably, the clamping component includes two chuck bodies and a rotary connection shaft that is fixed to the two chuck bodies. An elastic member is installed inside the rotary connection shaft. There are saw teeth on the inside of the front end of the chuck, and the hand part of the chuck is provided with Has insulating sheath.
优选地，设备区内设有IA、IB、IC、I0、Ia、Ib、Ic七个设备区电流接线端子和UA、UB、UC、U0、Ua、Ub、Uc七个设备区电压接线端子，所述电流、电压接线端子通过接线装置与变压器同名接线柱连接。Preferably, there are seven equipment area current connection terminals IA , IB , IC , I0 , Ia , Ib , and Ic and UA , UB , UC , U0 , Ua There are seven voltage terminals in the equipment area, Ub and Uc . The current and voltage terminals are connected to the terminals of the same name of the transformer through wiring devices.
优选地，仪器区内设有+I、-I仪器区电流接线端子和+U、-U仪器区电压接线端子，所述电流、电压接线端子通过试验仪器自身配套的试验线缆与所述试验仪器同名接线端子对应连接。Preferably, the instrument area is provided with +I and -I instrument area current terminals and +U and -U instrument area voltage terminals. The current and voltage terminals are connected to the test through the test cables provided by the test instrument itself. Connect the corresponding terminals of the instrument with the same name.
优选地，转换开关包括高压侧转换开关和低压侧转换开关，所述高压侧转换开关包括OFF档、RAO档、RBO档和RCO档，用于控制试验电路的切断和实现变压器高压侧直流电阻的测量，所述低压侧转换开关包括OFF档、Rab档、Rbc档和Rca档，用于控制试验电路的切断和实现变压器低压侧相间电阻的测量。Preferably, the transfer switch includes a high-voltage side transfer switch and a low-voltage side transfer switch. The high-voltage side transfer switch includes an OFF gear, an RAO gear, an RBO gear, and an RCO gear. It is used to control the cutting off of the test circuit and realize the high-voltage side of the transformer. For the measurement of DC resistance, the low-voltage side transfer switch includes OFF gear,Rab gear, Rbc gear and Rca gear, which are used to control the cutting off of the test circuit and realize the measurement of the interphase resistance on the low voltage side of the transformer.
优选地，仪器区电流接线端子+I在所述转换盒内部分别通过开关S1、S2、S3、S5、S6和设备区电流接线端子IA、IB、IC、Ia、Ib对应电连接，所述仪器区电流接线端子-I在所述转换盒内部分别通过开关S4、S7、S8和设备区电流接线端子Io、Ib、Ic对应电连接，所述仪器区电压接线端子+U在所述转换盒内部分别通过开关S1’、S2’、S3’、S5’、S6’和设备区电压接线端子UA、UB、UC、Ua、Ub对应电连接，所述仪器区电压接线端子-U在所述转换盒内部分别通过开关S4’、S7’、S8’和设备区电压接线端子Uo、Ub、Uc对应电连接。Preferably, the current connection terminal +I in the instrument area corresponds to the electrical current connection terminals IA , IB , IC , Ia , and Ib in the equipment area through switches S1, S2, S3, S5, S6 respectively inside the conversion box. connection, the instrument area current terminal-I is electrically connected through switches S4, S7, S8 and the equipment area current terminals Io , Ib , and Ic inside the conversion box, and the instrument area voltage terminal is connected +U is electrically connected inside the conversion box through switches S1', S2', S3', S5', S6' and the equipment area voltage terminals UA , UB , UC , Ua and Ub respectively, so The instrument area voltage terminals -U are electrically connected to the equipment area voltage terminals Uo , Ub , and Uc through switches S4', S7', and S8' respectively inside the conversion box.
优选地，转换盒盒体为中空长方体，六面均为绝缘材质。Preferably, the conversion box body is a hollow rectangular parallelepiped, and all six sides are made of insulating material.
采用上述技术方案所产生的有益效果在于：传统变压器直流电阻测试过程中，操作人员需多次攀登变压器进行高空接线、换线工作，不仅耗时长、效率低，而且坠落和触电的风险高，通过采用变压器直流电阻试验接线转换盒，可将高空接线、换线工作转移至地面进行，降低了试验人员高空作业的次数和安全风险，避免了反复接线、换线工作，有效缩短了试验时间，提高了工作效率，实用性强。The beneficial effect of adopting the above technical solution is that during the traditional DC resistance test of the transformer, the operator needs to climb the transformer many times to perform high-altitude wiring and line changing work, which is not only time-consuming and inefficient, but also has a high risk of falling and electric shock. The use of the transformer DC resistance test wiring conversion box can transfer high-altitude wiring and line-changing work to the ground, reducing the number of high-altitude operations and safety risks for testers, avoiding repeated wiring and line-changing work, effectively shortening the test time, and improving Improves work efficiency and is highly practical.
附图说明Description of drawings
图1是本发明所述转换盒内部电路连接示意图；Figure 1 is a schematic diagram of the internal circuit connection of the conversion box according to the present invention;
图2是本发明所述转换盒主视图；Figure 2 is a front view of the conversion box according to the present invention;
图3是本发明所述接线装置夹持部件结构示意图；Figure 3 is a schematic structural diagram of the clamping component of the wiring device according to the present invention;
图4是本发明所述接线装置插拔式部件结构示意图。Figure 4 is a schematic structural diagram of the pluggable components of the wiring device according to the present invention.
图中：1.设备区；2.仪器区；3.操作区；4.设备区电流接线端子；5.设备区电压接线端子；6.高压侧转换开关；7.低压侧转换开关；8.仪器区电流接线端子；9.仪器区电压接线端子；10.夹头；11.转动连接轴；12.弹性件；13.锯齿；14.绝缘护套；15.线缆；16.插头。In the picture: 1. Equipment area; 2. Instrument area; 3. Operation area; 4. Current terminals in the equipment area; 5. Voltage terminals in the equipment area; 6. High-voltage side transfer switch; 7. Low-voltage side transfer switch; 8. Current terminal block in the instrument area; 9. Voltage terminal block in the instrument area; 10. Chuck; 11. Rotating connecting shaft; 12. Elastic member; 13. Sawtooth; 14. Insulating sheath; 15. Cable; 16. Plug.
具体实施方式Detailed ways
下面结合附图和具体实施方式对本发明作进一步详细的说明，但本发明的保护范围不局限于以下所述。The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited to the following description.
结合图1-图4，详述如下：Combined with Figures 1-4, the details are as follows:
如图1所示，一种变压器直流电阻试验接线转换盒，其特征在于，所述转换盒正面为矩形测试面板，包括：设备区1、仪器区2和操作区3；As shown in Figure 1, a transformer DC resistance test wiring conversion box is characterized in that the front of the conversion box is a rectangular test panel, including: equipment area 1, instrument area 2 and operation area 3;
所述设备区1内设有与变压器同名接线柱相连接的电流、电压接线端子，用于与变压器同名接线柱连接；The equipment area 1 is provided with current and voltage terminal blocks connected to the terminals of the same name of the transformer for connection to the terminals of the same name of the transformer;
所述仪器区2内设有与实验仪器同名接线端子相连接的电流、电压接线端子，用于与试验仪器同名接线端子连接；The instrument area 2 is provided with current and voltage terminals connected to the terminals of the same name of the experimental instrument for connection with the terminals of the same name of the experimental instrument;
所述操作区3内设有转换开关，用于实现档位选择和试验电路的切换；There is a transfer switch in the operation area 3, which is used to realize gear selection and test circuit switching;
所述设备区1和仪器区2内的电流、电压接线端子，在所述转换盒本体内部，通过所述转换开关控制的试验电路与所述操作区电连接。The current and voltage terminals in the equipment area 1 and the instrument area 2 are electrically connected to the operation area through the test circuit controlled by the transfer switch inside the conversion box body.
具体地，如图3和图4所示，转换盒还包括接线装置，所述接线装置包括线缆15、夹持部件和插拔式部件，所述夹持部件与变压器接线柱连接，所述插拔式部件与所述设备区内的电流、电压接线端子连接，所述夹持部件与所述插拔式部件通过所述线缆15固定连接；所述夹持部件包括两个夹头10本体、穿装固定两夹头10本体的转动连接轴11，本发明实施例以可转动螺栓为例，穿装固定两夹头10本体，转动连接轴11内部穿装有弹性件12，如图3所示，本发明实施例以弹簧为例，所述夹头10前端内侧设有锯齿13，夹头10手持部设有绝缘护套14。测试接线过程中，测试人员将线缆15插头16部分插入设备区电流、电压接线端子通孔内，手持绝缘护套14部分，将夹头10锯齿13部分紧紧夹在变电器接线柱顶部套管处，从而实现转换盒与变压器同名接线柱的牢固连接。Specifically, as shown in Figures 3 and 4, the conversion box also includes a wiring device. The wiring device includes a cable 15, a clamping component and a plug-in component. The clamping component is connected to the transformer terminal, and the The plug-in component is connected to the current and voltage terminals in the equipment area, and the clamping component and the plug-in component are fixedly connected through the cable 15; the clamping component includes two clamps 10 The main body and the rotary connecting shaft 11 that fixes the body of the two chucks 10. In the embodiment of the present invention, a rotatable bolt is used as an example to wear and fix the body of the two chucks 10. The elastic member 12 is installed inside the rotating connecting shaft 11, as shown in the figure. As shown in 3, the embodiment of the present invention takes a spring as an example. The inside of the front end of the chuck 10 is provided with saw teeth 13, and the hand-held part of the chuck 10 is provided with an insulating sheath 14. During the test wiring process, the tester inserts the 15 plugs and 16 parts of the cable into the through holes of the current and voltage terminals in the equipment area, holds the 14 parts of the insulating sheath, and tightly clamps the sawtooth 13 parts of the chuck 10 on the top cover of the transformer terminal pipe to achieve a firm connection between the converter box and the transformer terminal with the same name.
采用上述技术方案的有益效果是，接线装置与转换盒采用插拔式结构连接，操作简单方便，夹头前端内侧设为锯齿状，可实现接线装置与变压器接线柱的稳定、牢固连接，夹头手持部分设有绝缘护套，降低了测试人员触电的风险，有效消除了安全隐患。The beneficial effect of adopting the above technical solution is that the wiring device and the conversion box are connected in a plug-in structure, which is simple and convenient to operate. The inside of the front end of the chuck is set in a zigzag shape, which can achieve a stable and firm connection between the wiring device and the transformer terminal. The chuck The handheld part is equipped with an insulating sheath, which reduces the risk of electric shock for testers and effectively eliminates safety hazards.
具体地，如图2所示，设备区1内设有IA、IB、IC、I0、Ia、Ib、Ic七个设备区电流接线端子4和UA、UB、UC、U0、Ua、Ub、Uc七个设备区电压接线端子5，所述电流、电压接线端子通过接线装置与变压器同名接线柱连接；仪器区2内设有+I、-I仪器区电流接线端子8和+U、-U仪器区电压接线端子9，所述电流、电压接线端子通过试验仪器自身配套的试验线缆与所述试验仪器同名接线端子对应连接。试验过程中，将设备区1内各个接线柱与待测变压器同名接线柱通过接线装置一一对应连接，将仪器区2内各个接线柱与试验仪器同名接线端子通过试验仪器自身的试验线缆一一对应连接。Specifically, as shown in Figure 2, the equipment area 1 is provided with seven equipment area current terminals 4 IA , IB , IC , I0 , Ia , Ib , Ic and UA , UB , There are seven equipment area voltage terminals 5, UC , U0 , Ua , Ub and Uc . The current and voltage terminals are connected to the transformer terminals of the same name through wiring devices; the instrument area 2 is equipped with +I, - I instrument area current terminal 8 and +U, -U instrument area voltage terminals 9, the current and voltage terminals are connected correspondingly to the terminals of the same name of the test instrument through the test cables provided by the test instrument itself. During the test, connect each terminal in the equipment area 1 to the terminal with the same name of the transformer under test through the wiring device, and connect each terminal in the instrument area 2 with the terminal of the test instrument with the same name through the test cable of the test instrument itself. One corresponding connection.
采用上述技术方案的有益效果是，通过在转换盒本体上设置与待测变压器一一对应连接的同名电流、电压接线端子，可一次性完成所有接线工作，试验过程，无需再攀登变压器手动进行接线、换线工作，减少了测试时间，提高了工作效率，且避免了可能由于拆、接线造成的试验误差和触电风险。The beneficial effect of adopting the above technical solution is that by setting current and voltage terminal blocks with the same names on the converter box body that are connected one-to-one to the transformer under test, all wiring work can be completed at one time. During the test process, there is no need to climb the transformer to perform manual wiring. , Wiring replacement work reduces test time, improves work efficiency, and avoids test errors and electric shock risks that may be caused by disassembly and wiring.
具体地，如图2所示，转换开关包括高压侧转换开关6和低压侧转换开关7，所述高压侧转换开关6包括OFF档、RAO档、RBO档和RCO档，用于控制试验电路的切断和实现变压器高压侧直流电阻的测量，所述低压侧转换开关7包括OFF档、Rab档、Rbc档和Rca档，用于控制试验电路的切断和实现变压器低压侧相间电阻的测量。试验过程中，拧动旋转开关至相应档位，即可在转换盒盒体内部实现试验电路的自动切换，将与档位指示的待测绕组接入试验电路，完成待测电阻阻值的测量。Specifically, as shown in Figure 2, the transfer switch includes a high-voltage side transfer switch 6 and a low-voltage side transfer switch 7. The high-voltage side transfer switch 6 includes OFF gear, RAO gear, RBO gear and RCO gear, for controlling The test circuit is cut off and the DC resistance of the high-voltage side of the transformer is measured. The low-voltage side switch 7 includes an OFF position, a Rab position, an Rbc position and an Rca position, and is used to control the cutting of the test circuit and realize the phase-to-phase switching of the low-voltage side of the transformer. Measurement of resistance. During the test, by turning the rotary switch to the corresponding gear, the test circuit can be automatically switched inside the conversion box, and the winding under test indicated by the gear is connected to the test circuit to complete the measurement of the resistance of the resistor under test. .
采用上述技术方案的有益效果是，试验过程中，不必再人工换线、接线，通过转换开关即可在转换盒盒体内部实现试验电路的自动切换，有效规避了试验人员高空换线的危险，操作简单方便，节省了操作时间，提高了工作效率。The beneficial effect of adopting the above technical solution is that during the test process, there is no need to manually change wires and connections. The test circuit can be automatically switched inside the conversion box through the transfer switch, effectively avoiding the danger of test personnel changing wires at high altitude. The operation is simple and convenient, saving operation time and improving work efficiency.
具体地，仪器区2电流接线端子+I在所述转换盒内部分别通过开关S1、S2、S3、S5、S6和设备区1电流接线端子IA、IB、IC、Ia、Ib对应电连接，所述仪器区2电流接线端子-I在所述转换盒内部分别通过开关S4、S7、S8和设备区1电流接线端子Io、Ib、Ic对应电连接，所述仪器区2电压接线端子+U在所述转换盒内部分别通过开关S1’、S2’、S3’、S5’、S6’和设备区1电压接线端子UA、UB、UC、Ua、Ub对应电连接，所述仪器区2电压接线端子-U在所述转换盒内部分别通过开关S4’、S7’、S8’和设备区1电压接线端子Uo、Ub、Uc对应电连接。如图1所示，仪器区2电流接线端子+I通过开关S1与设备区电流接线端子IA电连接，仪器区电流接线端子+I通过开关S2与设备区电流接线端子IB电连接，仪器区电流接线端子+I通过开关S3与设备区电流接线端子IC电连接，仪器区电流接线端子+I通过开关S5与设备区电流接线端子Ia电连接，仪器区电流接线端子+I通过开关S6与设备区电流接线端子Ib电连接，仪器区电流接线端子-I通过开关S4与设备区电流接线端子Io电连接，仪器区电流接线端子-I通过开关S7与设备区电流接线端子Ib电连接，仪器区电流接线端子-I通过开关S8与设备区电流接线端子Ic电连接仪器区2电压接线端子+U通过开关S1’与设备区电压接线端子UA电连接仪器区电压接线端子+U通过开关S2’与设备区电压接线端子UB电连接,仪器区电压接线端子+U通过开关S3’与设备区电压接线端子UC电连接, 仪器区电压接线端子+U通过开关S5’与设备区电压接线端子Ua电连接,仪器区电压接线端子+U通过开关S6’与设备区电压接线端子Ub电连接,仪器区电压接线端子-U通过开关S4’与设备区电压接线端子Uo电连接,仪器区电压接线端子-U通过开关S7’与设备区电压接线端子Ub电连接,仪器区电压接线端子-U通过开关S8’与设备区电压接线端子Uc电连接。Specifically, the current connection terminal +I of the instrument area 2 passes through the switches S1, S2, S3, S5, S6 and the current connection terminals IA , IB , IC , Ia , Ib of the equipment area 1 inside the conversion box respectively. Correspondingly electrically connected, the current connection terminal-I of the instrument area 2 is connected electrically through switches S4, S7, S8 and the current connection terminalsIo ,Ib andIc of the equipment area 1 respectively inside the conversion box. Zone 2 voltage terminal +U passes through switches S1', S2', S3', S5', S6' and equipment zone 1 voltage terminals UA , UB , UC , Ua , U respectively inside the conversion box.b corresponds to electrical connection, and the instrument area 2 voltage terminal-U is connected to the equipment area 1 voltage terminal Uo , Ub , and Uc through switches S4', S7', and S8' respectively inside the conversion box. . As shown in Figure 1, the current connection terminal +I in the instrument area 2 is electrically connected to the current connection terminal IA in the equipment area through the switch S1, and the current connection terminal +I in the instrument area is electrically connected to the current connection terminal IB in the equipment area through the switch S2. The area current terminal +I is electrically connected to the equipment area current terminal IC through the switch S3. The instrument area current terminal +I is electrically connected to the equipment area current terminal Ia through the switch S5. The instrument area current terminal +I is electrically connected to the equipment area current terminal I a through the switch. S6 is electrically connected to the equipment area current terminal Ib , the instrument area current terminal -I is electrically connected to the equipment area current terminal Io through switch S4, and the instrument area current terminal -I is electrically connected to the equipment area current terminal I through switch S7.b Electrical connection, the instrument area current terminal -I is connected to the equipment area current terminal I through switch S8c Electrically connected to the instrument area 2 voltage terminal +U Through switch S1' and the equipment area voltage terminal UA Electrical connection to the instrument area voltage wiring The terminal +U is electrically connected to the equipment area voltage terminal UB through the switch S2', the instrument area voltage terminal +U is electrically connected to the equipment area voltage terminal UC through the switch S3', and the instrument area voltage terminal +U is through the switch S5. ' is electrically connected to the equipment area voltage terminal Ua , the instrument area voltage terminal +U is electrically connected to the equipment area voltage terminal Ub through switch S6', and the instrument area voltage terminal -U is connected to the equipment area voltage through switch S4' The terminal Uo is electrically connected, the instrument area voltage terminal -U is electrically connected to the equipment area voltage terminal Ub through the switch S7', and the instrument area voltage terminal -U is electrically connected to the equipment area voltage terminal Uc through the switch S8'.
采用上述技术方案的有益效果是，设备区电流电压接线端子通过开关与仪器区电流电压接线端子电连接，可灵活方便的实现试验电路的自动切换，避免了试验过程中频繁的换线、接线工作，减少了人工换线、接线过程中的错误率，提高了工作效率。The beneficial effect of adopting the above technical solution is that the current and voltage terminals in the equipment area are electrically connected to the current and voltage terminals in the instrument area through switches, which can flexibly and conveniently realize automatic switching of the test circuit and avoid frequent wire changes and wiring work during the test process. , reducing the error rate during manual line changing and wiring, and improving work efficiency.
具体地，转换盒盒体为中空长方体，六面均为绝缘材质。Specifically, the conversion box body is a hollow rectangular parallelepiped, and all six sides are made of insulating material.
采用上述技术方案的有益效果是，转换盒盒体采用绝缘材质，有效降低了高压环境下操作带来的触电风险，提高了试验人员操作过程中的安全性。The beneficial effect of adopting the above technical solution is that the converter box body is made of insulating material, which effectively reduces the risk of electric shock caused by operation in a high-voltage environment and improves the safety of test personnel during operation.
使用过程：试验时，测试人员攀登变压器，手持试验线15夹头10的绝缘护套14部分，将夹头10前端锯齿13部分紧紧夹在变电器接线柱顶部套管处，一次性完成所有接线，通过试验线将变压器电流电压信号直接引入到转换盒中；转换盒通过仪器区2内的电流电压接线端子与试验仪器同名接线端子连接；转动转换开关，将变压器高压侧和低压侧各相直流电阻依次接入试验电路，实现变压器高压侧和低压侧不同相位直流电阻的依次测试。如图1和图2所示，当高压侧转换开关6切换到RAO档时，开关S1、S4、S1’、S4’闭合，开关S2、S3、S5、S6、S7、S8、S2’、S3’、S5’、S6’、S7’、S8’断开，此时测量变压器高压侧A相直流电阻RAO；当高压侧转换开关6切换到RBO档时，开关S2、S4、S2’、S4’闭合，开关S1、S3、S5、S6、S7、S8、S1’、S3’、S5’、S6’、S7’、S8’断开，此时测量变压器高压侧B相直流电阻RBO；当高压侧转换开关6切换到RCO档时，开关S3、S4、S3’、S4’闭合，开关S1、S2、S5、S6、S7、S8、S1’、S2’、S5’、S6’、S7’、S8’断开，此时测量变压器高压侧C相直流电阻RCO；当低压侧转换开关7切换到Rab档时，开关S5、S7、S5’、S7’闭合，开关S1、S2、S3、S4、S6、S8、S1’、S2’、S3’、S4’、S6’、S8’断开，此时测量变压器低压侧a、b相间直流电阻Rab；当低压侧转换开关7切换到Rbc档时，开关S6、S8、S6’、S8’闭合，开关S1、S2、S3、S4、S5、S7、S1’、S2’、S3’、S4’、S5’、S7’断开，此时测量变压器低压侧b、c相间直流电阻Rbc；当低压侧转换开关7切换到Rca档时，开关S5、S8、S5’、S8’闭合，开关S1、S2、S3、S4、S6、S7、S1’、S2’、S3’、S4’、S6’、S7’断开，此时测量变压器低压侧c、a相间直流电阻Rca；当高压侧转换开关6或低压侧转换开关7切换到OFF档时，开关全部处于断开状态。Usage process: During the test, the tester climbs the transformer, holds the insulating sheath 14 part of the test wire 15 chuck 10, tightly clamps the sawtooth 13 part of the front end of the chuck 10 at the top sleeve of the transformer terminal, and completes everything at one time Wiring, the current and voltage signals of the transformer are directly introduced into the conversion box through the test wire; the conversion box is connected to the terminal of the test instrument with the same name through the current and voltage terminals in the instrument area 2; turn the conversion switch to connect the high-voltage side and low-voltage side of the transformer to each phase. The DC resistance is connected to the test circuit in turn to realize the sequential testing of the DC resistance of different phases on the high voltage side and low voltage side of the transformer. As shown in Figure 1 and Figure 2, when the high-voltage side transfer switch 6 is switched to the RAO position, the switches S1, S4, S1', S4' are closed, and the switches S2, S3, S5, S6, S7, S8, S2', S3', S5', S6', S7', and S8' are disconnected. At this time, measure the A-phase DC resistance RAO of the high-voltage side of the transformer; when the high-voltage side transfer switch 6 is switched to the RBO position, switches S2, S4, S2' , S4' is closed, switches S1, S3, S5, S6, S7, S8, S1', S3', S5', S6', S7', S8' are open. At this time, measure the B-phase DC resistance RBO on the high voltage side of the transformer. ; When the high-voltage side transfer switch 6 is switched to the RCO position, the switches S3, S4, S3', S4' are closed, and the switches S1, S2, S5, S6, S7, S8, S1', S2', S5', S6' , S7', S8' are disconnected. At this time, measure the C-phase DC resistance RCO of the high-voltage side of the transformer; when the low-voltage side transfer switch 7 is switched to theRab position, the switches S5, S7, S5', S7' are closed, and the switches S1, S2, S3, S4, S6, S8, S1', S2', S3', S4', S6', S8' are disconnected. At this time, measure the DC resistance Rab between phases a and b of the low-voltage side of the transformer; when the low-voltage side transfer switch 7 When switching to Rbc position, switches S6, S8, S6', S8' are closed, switches S1, S2, S3, S4, S5, S7, S1', S2', S3', S4', S5', S7' disconnect, at this time measure the DC resistance Rbc between phases b and c on the low-voltage side of the transformer; when the low-voltage side transfer switch 7 is switched to the Rca position, switches S5, S8, S5', S8' are closed, and switches S1, S2, S3, S4, S6, S7, S1', S2', S3', S4', S6', S7' are disconnected. At this time, measure the DC resistance Rca between the c and a phases of the low-voltage side of the transformer; when the high-voltage side transfer switch 6 or the low-voltage side When the transfer switch 7 is switched to the OFF position, all switches are in the off state.
采用上述技术方案的有益效果是，传统高空测量接线的复杂性、反复性、耗时长、效率低等问题。利用试验线将变压器绕组接线夹转移至地面，不仅可将高空接线、换线工作转移至地面进行，降低了试验人员高空作业的次数和风险；而且可通过转换开关实现高、低压侧三相绕组试验接线的自动切换，避免了反复接线、换线工作，以及因此而造成的试验误差，有效缩短了试验时间，提高了工作效率，降低了触电风险。同时，本发明测量时间短，数据准确，不会增加测量误差，能够真实反映变压器绕组的直流电阻，可应用于Y/△接线方式的35kV、110kV和220kV双绕组变压器直流电阻测量试验，实用性强，易于推广。The beneficial effect of adopting the above technical solution is that the traditional high-altitude measurement wiring problems include complexity, repeatability, long time consumption, and low efficiency. By using test wires to transfer the transformer winding terminal clamps to the ground, not only can high-altitude wiring and wiring work be transferred to the ground, reducing the number and risks of high-altitude operations for testers; it can also realize high- and low-voltage side three-phase windings through transfer switches. The automatic switching of test wiring avoids repeated wiring and changing work, and the resulting test errors, effectively shortens the test time, improves work efficiency, and reduces the risk of electric shock. At the same time, the measurement time of the present invention is short, the data is accurate, the measurement error will not be increased, and the DC resistance of the transformer winding can be truly reflected. It can be applied to the DC resistance measurement test of 35kV, 110kV and 220kV double winding transformers in Y/Δ connection mode, and is practical. Strong and easy to promote.
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710029263.9ACN106706970B (en) | 2017-01-16 | 2017-01-16 | Wiring conversion box for DC resistance test of transformer |
| Application Number | Priority Date | Filing Date | Title |
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| CN201710029263.9ACN106706970B (en) | 2017-01-16 | 2017-01-16 | Wiring conversion box for DC resistance test of transformer |
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| CN106706970A CN106706970A (en) | 2017-05-24 |
| CN106706970Btrue CN106706970B (en) | 2023-11-24 |
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| CN201710029263.9AActiveCN106706970B (en) | 2017-01-16 | 2017-01-16 | Wiring conversion box for DC resistance test of transformer |
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