In order to cooperate with the implementation of the "Protection Test Regulations for Electric Safety Tools and Appliances" issued by the State Power Corporation, our company has developed a mechanical performance testing machine for electrical safety tools and appliances based on years of experience in testing safety tools and appliances. The machine can complete the preventive test of mechanical properties of all safety tools (safety belts, foot buckles, lifting boards, bamboo (wood) ladders, safety helmets) specified in the "Regulations".

WJDE-I different frequency dielectric loss automatic tester is a high-precision instrument for automatic measurement of dielectric loss tangent and capacitance of various high-voltage power equipment in power plants, substations and other fields. Due to the use of frequency conversion technology, it can ensure accurate measurement under strong electric field interference. The instrument adds Chinese menu operation function on the basis of GWS-4, one operation, the microcomputer automatically completes the whole process of measurement. It is the most ideal dielectric loss measurement equipment.

Dielectric loss measurement is a very basic method in insulation test, which can effectively find the overall moisture deterioration of electrical equipment insulation, as well as local defects. It is widely used in electrical manufacturing, electrical equipment installation, handover and preventive testing. The measurement of dielectric loss of transformers, mutual inductors, reactors, capacitors, bushings, arresters, etc. is the most basic method to measure their insulation performance.

一. Overview 　　WJFA-2100 variable frequency volt-ampere characteristic comprehensive tester is a new generation of innovative CT and PT test instrument developed on the basis of the traditional transformer volt-ampere characteristic ratio polarity comprehensive tester based on voltage regulator, booster and current booster, widely listening to user opinions, after a large number of market research and in-depth theoretical research. The device adopts high-performance DSP and FPGA, advanced manufacturing technology, to ensure stable and reliable product performance, complete functions, high degree of automation, high test efficiency, and is at the leading level in China, and is a professional test instrument for transformers in the power industry.

地埋电缆故障预定位探测仪是由发射机、接收机、感应式探头、电位差式探测架等组成。本仪器是光缆、电缆故障定位测试的专用仪表，适用测试对象为具有金属导体(线对、护层、屏蔽层)的各种光缆、电缆。其主要功能为对地绝缘不良点的定位测试，线缆路径的探测以及线缆埋深的测试。

WJBR-10A直流电阻测试仪，以高速微控制器为核心，内置充电电池及充电电路，采用高速A/D转换器及多量程程控电流源技术，实现了宽范围电阻测量，达到了前所未有的测量效果及高度自动化测量功能，具有精度高，测量范围宽，数据稳定，重复性好，抗干扰能力强，保护功能完善，充放电速度快等特点。尤其适合野外无电源条件及互感器等大阻值绕组测量。该仪器体积小、重量轻、便于携带，是变压器直流电阻测试的最新产品。

显示三相电源进线电压。

WJYJ-III油介质损耗测试仪是用于绝缘油等液体绝缘介质的介质损耗角及体积电阻率测试的一体化结构的高精密仪器。内部集成了介损油杯、温控仪、温度传感器、介损测试电桥、交流试验电源、标准电容器、高阻计、直流高压源等主要部件。其中加热部分采用了当前最为先进的高频感应加热方式，该加热方式具备油杯与加热体非接触、加热均匀、速度快、控制方便等优点。交流试验电源采用AC-DC-AC转换方式，有效避免市电电压及频率波动对介损测试准确性影响，即便是发电机发电，该仪器也能正确运行。内部标准电容器为SF6充气三极式电容，该电容的介损及电容量不受环境温度、湿度等影响，保证仪器长时间使用后仍然精度一致。