CN203551765U - Zero load on-site electric energy meter testing device - Google Patents
Zero load on-site electric energy meter testing device Download PDFInfo
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- CN203551765U CN203551765U CN201320603256.2U CN201320603256U CN203551765U CN 203551765 U CN203551765 U CN 203551765U CN 201320603256 U CN201320603256 U CN 201320603256U CN 203551765 U CN203551765 U CN 203551765U
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Abstract
本实用新型公开了一种零负荷现场电能表测试装置,包括电能表和电能表二次接线电流回路,在电能表二次接线电流回路中,电能表接线柱通过导线与电流互感器的二次绕组连接,其特征在于:在每个电流互感器二次绕组的其中一端与电能表接线柱之间串联连接一电流补偿装置,所述电流补偿装置包括一多匝线圈,多匝线圈的两端串联连接入电流互感器二次绕组与能表接线柱之间。本实用新型可在零负荷情况下进行接线检查和判断,成测试任务。
The utility model discloses a zero-load on-site electric energy meter testing device, which comprises an electric energy meter and a secondary wiring current loop of the electric energy meter. The winding connection is characterized in that a current compensation device is connected in series between one end of the secondary winding of each current transformer and the terminal post of the electric energy meter, the current compensation device includes a multi-turn coil, and the two ends of the multi-turn coil Connect in series between the secondary winding of the current transformer and the terminal of the energy meter. The utility model can carry out wiring inspection and judgment under the condition of zero load, and becomes a test task.
Description
技术领域 technical field
本实用新型涉及一种用于电能计量装置现场三相智能电能表接线检查和电能测试的装置。配合三相电能表现场校验仪,解决现场零负荷小电流情况下电能表接线状况的检查和电能测试,属于电能测试技术领域。 The utility model relates to a device for wiring inspection and electric energy testing of a three-phase intelligent electric energy meter on site of an electric energy metering device. Cooperating with a three-phase electric energy meter on-site calibrator, the utility model solves the inspection and electric energy test of electric energy meter wiring status under the condition of zero load and small current on site, and belongs to the technical field of electric energy test. the
背景技术 Background technique
目前由于受现有电能表现场校验仪电能表电流测试范围的限制,电能计量装置电能表的接线检查必须在有负荷(有电流)情况下进行的。但是如果在零负荷(无电流)情况下也同样需要进行接线检查和判断,及时发现电能计量装置可能存在的接线差错,避免电力经营的经济损失。 At present, due to the limitation of the current test range of the electric energy meter of the existing electric energy meter field calibrator, the wiring inspection of the electric energy meter of the electric energy metering device must be carried out under the condition of load (current). However, in the case of zero load (no current), wiring inspection and judgment are also required to detect possible wiring errors in the electric energy metering device in time to avoid economic losses in power management. the
实用新型内容 Utility model content
本实用新型所要解决的技术问题是提供一种能够在电能计量装置零负荷(无电流)情况下进行电能表接线检查和判断的装置。 The technical problem to be solved by the utility model is to provide a device capable of checking and judging the wiring of the electric energy meter under the condition of zero load (no current) of the electric energy metering device. the
为解决上述技术问题,本实用新型提供一种零负荷现场电能表测试装置,包括电能表和电能表二次接线电流回路,在电能表二次接线电流回路中,电能表接线柱通过导线与电流互感器的二次绕组连接,其特征在于:在每个电流互感器二次绕组的其中一端与电能表接线柱之间串联连接一电流放大装置,所述电流放大装置包括一多匝线圈,多匝线圈的两端串联连接入电流互感器二次绕组与能表接线柱之间。 In order to solve the above technical problems, the utility model provides a zero-load on-site electric energy meter testing device, including the electric energy meter and the secondary wiring current loop of the electric energy meter. The secondary winding connection of the transformer is characterized in that a current amplifying device is connected in series between one end of the secondary winding of each current transformer and the terminal post of the electric energy meter, and the current amplifying device includes a multi-turn coil, multiple The two ends of the turn coil are connected in series between the secondary winding of the current transformer and the terminal post of the energy meter. the
前述的零负荷现场电能表测试装置,其特征在于:所述电流放大装置包括检测用钳形电流互感器夹持区和接线区,所述接线区包括一个低端接口和至少一个高端接口,低端接口与每个高端接口之间通过插棒连接。 The aforementioned zero-load on-site watt-hour meter testing device is characterized in that: the current amplification device includes a clamping area of a clamp current transformer for detection and a wiring area, and the wiring area includes a low-end interface and at least one high-end interface. The end interface is connected with each high-end interface through a plunger. the
前述的零负荷现场电能表测试装置,其特征在于:所述电流放大装置设置于联合接线盒内。 The aforementioned zero-load on-site electric energy meter testing device is characterized in that: the current amplifying device is arranged in a joint junction box. the
本实用新型的工作原理为: The working principle of the utility model is:
电能表现场校验仪电流采样一般采用钳形电流互感器方式,现场接线方便快捷。钳形电流表的工作原理是建立在电流互感器工作原理基础上的,当握紧钳形电流表扳手时,电流互感器的铁心可以张开,被测电流的导线进入钳口内部作为电流互感器的一次绕组。当放松扳手铁心闭合后,根据互感器的原理而在其二次绕组上产生感应电流。本实用新型的装置采用电流互感器工作原理方式放大电能计量装置电流回路的电流,满足电能表现场校验仪的测试要求。 The current sampling of the electric energy meter field calibrator generally adopts the clamp current transformer method, and the field wiring is convenient and fast. The working principle of the clamp ammeter is based on the working principle of the current transformer. When the wrench of the clamp ammeter is held tightly, the iron core of the current transformer can be opened, and the wire of the measured current enters the inside of the jaw as the current transformer. primary winding. When the iron core of the loose wrench is closed, an induced current is generated on the secondary winding according to the principle of the transformer. The device of the utility model adopts the working principle mode of the current transformer to amplify the current of the current loop of the electric energy metering device, and meets the test requirements of the field calibrator of the electric energy meter. the
根据电流互感器工作原理(I2=(N1/N2)*I1)进行分析研究,在送电无负荷时,可以利用电力线路充电时的空载电流(I1),即在二次电流回路中串接一个有N匝数的环形线圈,将送电线路的电容电流或变压器的励磁电流放大N倍,来达到电能表现场校验仪工作的要求,完成计量装置零负荷下的接线检查和判断,实现送电现场立即首检。这样就不需要等到有实际负荷时再进行测试。 According to the analysis and research on the working principle of the current transformer (I2=(N1/N2)*I1), when there is no load in the power transmission, the no-load current (I1) when the power line is charged can be used, that is, the series in the secondary current loop Connect a ring coil with N turns to amplify the capacitive current of the power transmission line or the excitation current of the transformer by N times to meet the requirements of the electric energy meter field calibrator, and complete the wiring inspection and judgment of the metering device under zero load. Realize the first inspection immediately at the power transmission site. This eliminates the need to wait until there is an actual load to test. the
本实用新型所达到的有益效果:本实用新型的装置与电能表现场校验仪配合,无需负载,只需配置此种装置,可在零负荷情况下进行接线检查和判断,完成测试任务,从而及时发现电能计量装置可能存在的接线差错,避免电力经营的经济损失。同时有效提高现有设备的利用率,降低生产的成本。本实用新型可以广泛应用于电能计量装置现场检测。 The beneficial effects achieved by the utility model: the device of the utility model cooperates with the field calibrator of the electric energy meter without load, and only needs to be equipped with such a device, and the wiring inspection and judgment can be carried out under the condition of zero load, and the test task can be completed, thereby Timely discover the possible wiring errors of the electric energy metering device to avoid the economic loss of electric power operation. At the same time, the utilization rate of existing equipment can be effectively improved, and the cost of production can be reduced. The utility model can be widely used in on-site detection of electric energy metering devices. the
附图说明 Description of drawings
图1是现在钳形电流表的电流线圈绕置原理图; Figure 1 is a schematic diagram of the current coil winding of the current clamp ammeter;
图2是本实用新型钳形电流表的电流线圈绕置原理图; Fig. 2 is the schematic diagram of the current coil winding arrangement of the utility model pincer ammeter;
图3是本实用新型电流放大装置原理图; Fig. 3 is a schematic diagram of the utility model current amplification device;
图4为本实用新型的电流放大装置外型图; Fig. 4 is the external view of the current amplifying device of the present utility model;
图5是本实用新型的零负荷现场电能表测试装置结构示意图。 Fig. 5 is a structural schematic diagram of a zero-load on-site electric energy meter testing device of the present invention. the
具体实施方式 Detailed ways
如图1所示,钳形电流表的主要部件是一个穿心式电流互感器,在测量时将钳形电流表的磁铁2套在被测导线上,形成一匝的一次线圈3,利用电磁感应原理,钳形电流表的二次线圈1中便会产生感应电流。
As shown in Figure 1, the main component of the clamp ammeter is a through-core current transformer. When measuring, the
如果增加一次电流圈数,从而可以改变钳形互感器的匝数比,在一次电流同等的情况下可提高二次电流的输出。如图2所示,把钳表的开口磁铁2夹在一个多股环形线圈4中,改变一次匝数,可提高二次电流输出幅度,满足现场校验仪电流的取样和测试。
If the number of turns of the primary current is increased, the turns ratio of the clamp transformer can be changed, and the output of the secondary current can be increased under the condition that the primary current is equal. As shown in Figure 2, the
根据此原理在电能计量装置电流回路中串接一个具有N匝的电流线圈装置,现场校验仪的钳形电流互感器的钳夹夹在装置的线圈上。钳形电流互感器一次电流的安匝数被扩大了N倍。相当于电能计量装置电流回路电流值扩大了N倍,输入现场校验仪的电流随之扩大N倍。 According to this principle, a current coil device with N turns is connected in series in the current loop of the electric energy metering device, and the clamp of the clamp current transformer of the on-site calibrator is clamped on the coil of the device. The ampere-turns of the primary current of the clamp current transformer is enlarged by N times. It is equivalent to the current value of the current loop of the electric energy metering device being enlarged by N times, and the current input to the on-site calibrator is then enlarged by N times. the
图3为本实用新型电流放大装置原理图。在电能表二次电路回路中串联接入电流补放大装置,包括一个低端接口和至少一个高端接口,低端接口与每个高端接口之间通过插棒连接,采用多抽头线圈绕置技术,本实施例中提供三个高端接线端子。高低端可串接在电能计量装置电流回路中,高端分为三个可供选择的放大倍数(二倍,五倍和十倍),根据现场电流情况选择相应的放大倍数,连接相应的接线端子串接。 Fig. 3 is a schematic diagram of the current amplifying device of the present invention. Connect the current supplementary amplifier device in series in the secondary circuit circuit of the electric energy meter, including a low-end interface and at least one high-end interface. In this embodiment, three high-end connection terminals are provided. The high and low ends can be connected in series in the current loop of the electric energy metering device. The high end is divided into three optional magnifications (two times, five times and ten times). Select the corresponding magnification according to the current situation on site and connect the corresponding wiring The terminals are connected in series. the
图4为本实用新型的电流放大装置外型图。分为钳形电流互感器夹持区和 接线区,夹持区可满足各种规格钳口的钳形电流互感器夹起。接线区共有三组,分别为1000%、500%和200%接线端子接口,使用时通过φ4插棒连接线到电能表二次电流回路中。 FIG. 4 is an outline view of the current amplifying device of the present invention. It is divided into clamping area of clamp current transformer and wiring area, and the clamping area can meet clamping current transformers of various specifications of jaws. There are three groups in the wiring area, which are 1000%, 500% and 200% terminal interfaces. When in use, connect the wire to the secondary current circuit of the electric energy meter through the φ4 plug. the
图5本实用新型的零负荷现场电能表测试装置结构示意图,在电能表二次接线电流回路中,电能表接线柱通过导线与电流互感器的二次绕组7连接,检测时通过连接线将电流放大装置8安装在联合接线盒6内,把电流放大装置接入电能计量装置电流回路中,然后打开联合接线盒6电流连接片,让电流流过此电流放大装置8,测试时把现场校验仪的钳形电流互感器的钳夹夹在此电流放大装置8的夹持区上。
Fig. 5 is a schematic structural diagram of the zero-load on-site electric energy meter testing device of the present utility model. In the electric energy meter secondary wiring current loop, the electric energy meter terminal is connected with the secondary winding 7 of the current transformer through a wire, and the current is passed through the connecting wire during detection. The amplifying
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN103983825A (en) * | 2014-05-19 | 2014-08-13 | 国家电网公司 | Meter frame wiring rod head used for electric energy meter testing |
CN108107313A (en) * | 2018-01-30 | 2018-06-01 | 国网河南省电力公司平顶山供电公司 | The method that unloaded situation judges connection box of electric energy meter correctness |
CN109375129A (en) * | 2018-10-22 | 2019-02-22 | 国网重庆市电力公司电力科学研究院 | A field environment simulation method based on voltage and current decoupling and its tester |
CN113341363A (en) * | 2021-05-10 | 2021-09-03 | 国网浙江省电力有限公司金华供电公司 | Mutual inductor turn number conversion device |
-
2013
- 2013-09-25 CN CN201320603256.2U patent/CN203551765U/en not_active Expired - Lifetime
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103983825A (en) * | 2014-05-19 | 2014-08-13 | 国家电网公司 | Meter frame wiring rod head used for electric energy meter testing |
CN108107313A (en) * | 2018-01-30 | 2018-06-01 | 国网河南省电力公司平顶山供电公司 | The method that unloaded situation judges connection box of electric energy meter correctness |
CN109375129A (en) * | 2018-10-22 | 2019-02-22 | 国网重庆市电力公司电力科学研究院 | A field environment simulation method based on voltage and current decoupling and its tester |
CN113341363A (en) * | 2021-05-10 | 2021-09-03 | 国网浙江省电力有限公司金华供电公司 | Mutual inductor turn number conversion device |
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