CN105182173A - Novel combined-type mutual inductor polarity tester - Google Patents
Novel combined-type mutual inductor polarity tester Download PDFInfo
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Abstract
本发明提供一种新型组合式互感器极性测试仪,属于互感器测试装置领域,包括面板和外壳,面板安装在外壳上,面板上设有一次侧接口、二次侧接口、电流表接口、指示灯A、指示灯B、选择开关、测试开关和点触式开关,外壳内设有电池,电池的正极和负极分别通过选择开关和点触式开关连接到两个一次侧接口,选择开关的一个输出端依次通过指示灯A和保护电阻连接到一个一次侧接口,选择开关另一个输出端直接连接到一个一次侧接口,电池的正极依次通过测试开关、指示灯B和保护电阻连接到一个二次侧接口,可随时检测接线是否成功,并可检测电流表是否接反,大大的提高了检测效率。
The invention provides a novel combined transformer polarity tester, which belongs to the field of transformer testing devices, and includes a panel and a casing. Lamp A, indicator light B, selection switch, test switch and touch switch. There is a battery inside the shell. The output terminal is connected to a primary side interface through the indicator light A and the protection resistor in turn, the other output terminal of the selector switch is directly connected to a primary side interface, and the positive pole of the battery is connected to a secondary side interface through the test switch, indicator light B and protection resistor in turn. The side interface can detect whether the wiring is successful at any time, and can detect whether the ammeter is reversed, which greatly improves the detection efficiency.
Description
技术领域technical field
本发明提供一种新型组合式互感器极性测试仪,属于互感器测试装置领域。The invention provides a novel combined transformer polarity tester, which belongs to the field of transformer test devices.
背景技术Background technique
在电力系统中,电流互感器的极性测试非常重要。它是保证继电保护装置正确动作和计量准确的基本前提,目前,常用的方法时用2块干电池和1个指针式电流表来测试电流互感器的极性。In power systems, the polarity test of current transformers is very important. It is the basic premise to ensure the correct action and accurate measurement of the relay protection device. At present, the common method is to use 2 dry batteries and 1 pointer ammeter to test the polarity of the current transformer.
作业现场,互感器通常装在计量柜后,而电能表和接线盒装在计量柜前,在测试电流互感器极性时,一人在高压互感器的一次侧,利用干电池和导线连接电流互感器的进线和出线端或电压互感器的边相和中相,然后进行通、断操作,同时另一人用指针式万用表对准接线盒上相应的电流互感器二次侧进、出线观察万用表指针的偏转方向来判断接线极性是否正确。由于组合式互感器一二次线圈全部密封于接地的金属壳体内,触点距离外壳20cm距离,现有的互感器测试仪一次接线很难深入到互感器一次触点,通常需要2到3人将测试仪的触头加一根延长导线伸入一次触点,但是我们无法判断是否可靠接触,另外,互感器二次端子S1、S2连接到表尾接线盒K1、K2二次导线,通常会加一个端子排或者开关,可能会出现断线情况,还有可能出现S1接到K2、S2接到K1的情况,在测试互感器极性的过程中,当接通一次侧电源后,如果连接在表尾的电流表指针不偏转,我们无法判断时由于组合式互感器一次触点接触不好,还是由于计量柜前的触点没有接好,或者互感器二次侧与电能表之间的导线出现断线,现有极性测试仪表不能有效解决上述问题,我们只能通过万用表逐步排查问故障点。On the job site, the transformer is usually installed behind the metering cabinet, while the electric energy meter and junction box are installed in front of the metering cabinet. When testing the polarity of the current transformer, one person is on the primary side of the high-voltage transformer and uses dry batteries and wires to connect the current transformer. The input and output terminals of the current transformer or the side phase and middle phase of the voltage transformer, and then perform on and off operations. At the same time, another person uses a pointer multimeter to align the corresponding current transformer secondary side inlet and outlet on the junction box to observe the pointer of the multimeter The deflection direction to judge whether the wiring polarity is correct. Since the primary and secondary coils of the combined transformer are all sealed in the grounded metal shell, and the distance between the contacts and the shell is 20cm, it is difficult for the existing transformer tester to connect the primary wiring to the primary contact of the transformer, usually requiring 2 to 3 people. Extend the contact of the tester and an extension wire into the primary contact, but we cannot judge whether the contact is reliable. In addition, the secondary terminals S1 and S2 of the transformer are connected to the secondary wires of the junction box K1 and K2 at the end of the meter, usually Adding a terminal block or a switch may cause a disconnection, and there may be a situation where S1 is connected to K2 and S2 is connected to K1. In the process of testing the polarity of the transformer, when the primary power is turned on, if the connection The pointer of the ammeter at the end of the meter does not deflect. We cannot judge whether it is because the primary contact of the combined transformer is not in good contact, or because the contact in front of the metering cabinet is not connected properly, or the wire between the secondary side of the transformer and the energy meter. In the event of a disconnection, the existing polarity testing instrument cannot effectively solve the above problems. We can only use a multimeter to gradually troubleshoot the fault point.
发明内容Contents of the invention
本发明目的在于提供一种新型组合式互感器极性测试仪,可随时检测接线是否成功,并可检测电流表是否接反,大大的提高了检测效率。The purpose of the present invention is to provide a new type combined transformer polarity tester, which can detect whether the wiring is successful at any time, and can detect whether the ammeter is reversed, which greatly improves the detection efficiency.
本发明所述的新型组合式互感器极性测试仪,包括面板和外壳,面板安装在外壳上,面板上设有一次侧接口、二次侧接口、电流表接口、指示灯A、指示灯B、选择开关、测试开关和点触式开关,外壳内设有电池,电池的正极和负极分别通过选择开关和点触式开关连接到两个一次侧接口,选择开关的一个输出端依次通过指示灯A和保护电阻连接到一个一次侧接口,选择开关另一个输出端直接连接到一个一次侧接口,电池的正极依次通过测试开关、指示灯B和保护电阻连接到一个二次侧接口,电池负极直接连接到另一个二次侧接口,两个二次侧接口分别连接到两个电流表接口,一次侧接口、二次侧接口和电流表接口通过连接线与待测设备一次侧、二次侧以及电表连接。The novel combined transformer polarity tester of the present invention includes a panel and a casing, the panel is installed on the casing, and the panel is provided with a primary side interface, a secondary side interface, an ammeter interface, an indicator light A, an indicator light B, Selector switch, test switch and touch switch. There is a battery inside the casing. The positive and negative poles of the battery are respectively connected to two primary side interfaces through the selector switch and the touch switch. One output terminal of the selector switch passes through the indicator light A in turn. Connect the protection resistor to a primary side interface, the other output terminal of the selector switch is directly connected to a primary side interface, the positive pole of the battery is connected to a secondary side interface through the test switch, indicator light B and protection resistor in turn, and the negative pole of the battery is directly connected to To another secondary side interface, the two secondary side interfaces are respectively connected to the two ammeter interfaces, and the primary side interface, the secondary side interface and the ammeter interface are connected to the primary side, the secondary side and the ammeter of the device under test through connecting wires.
所述的新型组合式互感器极性测试仪,与需要测量的电流互感器的接头连接完毕后,选择开关的两路输出分别对应测试档位和工作档位,当选择开关拨到测试档时,即选择开关的输入端与连接指示灯A的输出端接通,当动作人员按下点触式开关时,若指示灯A不亮则代表一次侧接线未接好,若指示灯亮起则代表接线成功,于二次侧,通过闭合测试开关可以以同样的原理判断二次侧接线是否接好;电流表接口连接到计量屏上的电流表上后,可同样通过闭合测试开关来判断电流表接线方向是否正确,若接线正确电流表显示正值,若反接电流表显示负值,在判断接线是否成功以及电流表接线是否正确后,可将选择开关调节到工作档上,即电池与一次侧接点直接接通,可通过按下点触式开关,并观看电流表的指针摆动方向判断电流互感器的接线是否正确,整个设备结构简单成本低,且可检测过程中出现的任何问题,不需要一一排查,大大的提高了检测效率。After the new combined transformer polarity tester is connected to the joint of the current transformer to be measured, the two outputs of the selector switch correspond to the test gear and the working gear respectively. When the selector switch is turned to the test gear , that is, the input terminal of the selector switch is connected to the output terminal of the connection indicator A. When the operator presses the touch switch, if the indicator light A is off, it means that the primary side wiring is not connected properly. If the indicator light is on, it means If the wiring is successful, on the secondary side, the same principle can be used to judge whether the wiring of the secondary side is connected by closing the test switch; after the ammeter interface is connected to the ammeter on the metering screen, the direction of the ammeter wiring can also be judged by closing the test switch. Correct, if the wiring is correct, the ammeter displays a positive value, and if the ammeter displays a negative value, after judging whether the wiring is successful and whether the ammeter wiring is correct, you can adjust the selector switch to the working position, that is, the battery is directly connected to the primary side contact. You can judge whether the wiring of the current transformer is correct by pressing the point-touch switch and watching the pointer swing direction of the ammeter. The whole device has a simple structure and low cost, and can detect any problems that occur during the detection process. It does not need to be checked one by one. The detection efficiency is improved.
所述的新型组合式互感器极性测试仪,面板上设有电流表,电流表为毫安级电流表,电流表接口连接到电流表上的接口。可在面板上集成电流表,减短了导线的长度,可直接使用面板上的电流表,使观察数据也更加方便。In the novel combined transformer polarity tester, an ammeter is arranged on the panel, the ammeter is a milliampere-level ammeter, and the ammeter interface is connected to the interface on the ammeter. The ammeter can be integrated on the panel, which shortens the length of the wire, and the ammeter on the panel can be used directly, making it more convenient to observe the data.
所述的新型组合式互感器极性测试仪,一次侧接口、二次侧接口与待测设备之间的连接线包括导线,导线一端设有接线插头,导线另一端设有专用接头,专用接头包括绝缘层,绝缘层一端设有导电头,绝缘层另一端通过隔离环连接有手柄,导线的线芯穿过手柄、隔离层和绝缘层连接到铜制导电头。在测试时使铜制的导电头与互感器的接点进行接触,其他部位均为绝缘,提高了安全性,同时在把手与绝缘层之间加装隔离环进行隔离,可以有效的保证工作人员的人身安全。In the novel combined transformer polarity tester, the connection wires between the primary side interface, the secondary side interface and the equipment to be tested include wires, one end of the wires is provided with a wiring plug, and the other end of the wires is provided with a special joint. It includes an insulating layer, one end of the insulating layer is provided with a conductive head, the other end of the insulating layer is connected to a handle through an isolation ring, and the core of the wire passes through the handle, the insulating layer and the insulating layer to connect to the copper conductive head. During the test, the copper conductive head is in contact with the contact of the transformer, and other parts are insulated, which improves the safety. At the same time, an isolation ring is installed between the handle and the insulating layer for isolation, which can effectively ensure the safety of the staff Personal safety.
本发明与现有技术相比有益效果为:Compared with the prior art, the present invention has beneficial effects as follows:
所述的新型组合式互感器极性测试仪,与需要测量的电流互感器的接头连接完毕后,选择开关的两路输出分别对应测试档位和工作档位,当选择开关拨到测试档时,即选择开关的输入端与连接指示灯A的输出端接通,当动作人员按下点触式开关时,若指示灯A不亮则代表一次侧接线未接好,若指示灯亮起则代表接线成功,于二次侧,通过闭合测试开关可以以同样的原理判断二次侧接线是否接好;电流表接口连接到计量屏上的电流表上后,可同样通过闭合测试开关来判断电流表接线方向是否正确,若接线正确电流表显示正值,若反接电流表显示负值,在判断接线是否成功以及电流表接线是否正确后,可将选择开关调节到工作档上,即电池与一次侧接点直接接通,可通过按下点触式开关,并观看电流表的指针摆动方向判断电流互感器的接线是否正确,整个设备结构简单成本低,且可检测过程中出现的任何问题,不需要一一排查,大大的提高了检测效率。After the new combined transformer polarity tester is connected to the joint of the current transformer to be measured, the two outputs of the selector switch correspond to the test gear and the working gear respectively. When the selector switch is turned to the test gear , that is, the input terminal of the selector switch is connected to the output terminal of the connection indicator A. When the operator presses the touch switch, if the indicator light A is off, it means that the primary side wiring is not connected properly. If the indicator light is on, it means If the wiring is successful, on the secondary side, the same principle can be used to judge whether the wiring of the secondary side is connected by closing the test switch; after the ammeter interface is connected to the ammeter on the metering screen, the direction of the ammeter wiring can also be judged by closing the test switch. Correct, if the wiring is correct, the ammeter displays a positive value, and if the ammeter displays a negative value, after judging whether the wiring is successful and whether the ammeter wiring is correct, you can adjust the selector switch to the working position, that is, the battery is directly connected to the primary side contact. You can judge whether the wiring of the current transformer is correct by pressing the point-touch switch and watching the pointer swing direction of the ammeter. The whole device has a simple structure and low cost, and can detect any problems that occur during the detection process. It does not need to be checked one by one. The detection efficiency is improved.
附图说明Description of drawings
图1为面板结构示意图;Figure 1 is a schematic diagram of the panel structure;
图2为本发明电气原理图;Fig. 2 is electrical schematic diagram of the present invention;
图3为连接线结构示意图。Figure 3 is a schematic diagram of the connection line structure.
图中:1、面板;2、一次侧接口;3、二次侧接口;4、电流表接口;5、指示灯A;6、指示灯B;7、选择开关;8、测试开关;9、点触式开关;10、电池;11、接线插头;12、绝缘层;13、导电头;14、隔离环;15、手柄;16、待测设备;17、导线。In the figure: 1. Panel; 2. Primary side interface; 3. Secondary side interface; 4. Ammeter interface; 5. Indicator light A; 6. Indicator light B; 7. Selection switch; 8. Test switch; 9. Point Touch switch; 10, battery; 11, wiring plug; 12, insulating layer; 13, conductive head; 14, isolation ring; 15, handle; 16, equipment under test; 17, wire.
具体实施方式Detailed ways
下面结合本发明对本发明实施例做进一步说明:Embodiments of the present invention will be further described below in conjunction with the present invention:
实施例1:如图1和所示,本发明所述的新型组合式互感器极性测试仪,包括面板1和外壳,面板1安装在外壳上,面板1上设有一次侧接口2、二次侧接口3、电流表接口4、指示灯A5、指示灯B6、选择开关7、测试开关8和点触式开关9,外壳内设有电池10,电池10的正极和负极分别通过选择开关7和点触式开关9连接到两个一次侧接口2,选择开关7的一个输出端依次通过指示灯A5和保护电阻连接到一个一次侧接口2,选择开关7另一个输出端直接连接到一个一次侧接口2,电池10的正极依次通过测试开关8、指示灯B6和保护电阻连接到一个二次侧接口3,电池10负极直接连接到另一个二次侧接口3,两个二次侧接口3分别连接到两个电流表接口4,一次侧接口2、二次侧接口3和电流表接口4通过连接线与待测设备16一次侧、二次侧以及电表连接。Embodiment 1: as shown in Fig. 1 and, the novel combined transformer polarity tester of the present invention comprises panel 1 and shell, and panel 1 is installed on the shell, and panel 1 is provided with primary side interface 2, two Secondary side interface 3, ammeter interface 4, indicator light A5, indicator light B6, selection switch 7, test switch 8 and touch switch 9, a battery 10 is arranged inside the casing, and the positive pole and negative pole of the battery 10 pass through the selection switch 7 and the The touch switch 9 is connected to two primary-side interfaces 2, one output terminal of the selection switch 7 is connected to one primary-side interface 2 through the indicator light A5 and the protection resistor in turn, and the other output terminal of the selection switch 7 is directly connected to a primary-side interface Interface 2, the positive pole of the battery 10 is connected to a secondary side interface 3 through the test switch 8, the indicator light B6 and the protection resistor in turn, and the negative pole of the battery 10 is directly connected to another secondary side interface 3, and the two secondary side interfaces 3 are respectively Connected to two ammeter interfaces 4, the primary side interface 2, the secondary side interface 3 and the ammeter interface 4 are connected to the primary side, the secondary side and the ammeter of the device under test 16 through connecting wires.
实施例2:在实施例1所述的结构基础上,面板1上设有电流表,电流表为毫安级电流表,电流表接口连接到电流表上的接口。Embodiment 2: On the basis of the structure described in Embodiment 1, an ammeter is provided on the panel 1, the ammeter is a milliampere-level ammeter, and the ammeter interface is connected to the interface on the ammeter.
实施例3:在实施例2所述的结构基础上,如图3所示,一次侧接口2、二次侧接口3与待测设备16之间的连接线包括导线17,导线17一端设有接线插头11,导线17另一端设有专用接头,专用接头包括绝缘层12,绝缘层12一端设有导电头13,绝缘层12另一端通过隔离环14连接有手柄15,导线17的线芯穿过手柄15、隔离环14和绝缘层12连接到铜制导电头13。Embodiment 3: On the basis of the structure described in Embodiment 2, as shown in Figure 3, the connecting line between the primary side interface 2, the secondary side interface 3 and the device under test 16 includes a wire 17, and one end of the wire 17 is provided with Wiring plug 11, the other end of conductor 17 is provided with special joint, and special joint comprises insulating layer 12, and insulating layer 12 one end is provided with conductive head 13, and insulating layer 12 other end is connected with handle 15 through isolating ring 14, and the wire core of conducting wire 17 wears It is connected to the copper conductive head 13 through the handle 15 , the isolation ring 14 and the insulating layer 12 .
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CN110286295A (en) * | 2019-05-13 | 2019-09-27 | 国家电网有限公司 | A device and method for testing the polarity of a DC feeder screen branch CT |
CN111443309A (en) * | 2020-04-15 | 2020-07-24 | 上海佑科仪器仪表有限公司 | Device for measuring positive and negative polarities of electronic balance coil |
CN112147563A (en) * | 2020-08-27 | 2020-12-29 | 国网山西省电力公司阳泉供电公司 | Fault electric meter tester |
CN112505593A (en) * | 2020-10-13 | 2021-03-16 | 国网浙江省电力有限公司绍兴供电公司 | Measuring loop polarity check instrument |
CN115421080A (en) * | 2022-09-21 | 2022-12-02 | 国网山东省电力公司淄博供电公司 | A low-voltage current transformer wiring inspection instrument |
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