Overview
Current Transformer (CT) Test Series equipment is essential for verifying the performance of current transformers, which are critical components in electrical metering and protection systems. These testers simulate real-world conditions to evaluate CTs' accuracy and reliability, ensuring they meet regulatory standards such as IEC 60044 and IEEE C57.13. Modern CT testers integrate advanced microprocessors and software for automated testing, reducing human error. They are widely used by utilities, industrial plants, and calibration laboratories to maintain grid stability and prevent revenue loss due to metering inaccuracies.
Structure and Working Principle
A typical CT tester consists of a signal generator, precision measurement unit, and data processing module. The device injects a known current into the CT under test and compares the output against expected values to determine errors in ratio and phase angle. Portable models often include built-in power supplies and touchscreen interfaces, while benchtop versions offer higher precision for laboratory use. Key components include high-stability shunt resistors, low-distribution transformers, and isolation circuits to ensure safe operation up to kV-level systems.
Key Features
Leading CT testers offer features like auto-calibration, temperature compensation, and Bluetooth/Wi-Fi connectivity for remote monitoring. Some models support simultaneous testing of multiple parameters (e.g., ratio, excitation, and burden) to streamline workflows. Safety features such as overload protection and insulated test leads are standard. High-end devices may include software for generating compliance reports aligned with ISO 17025 requirements, making them indispensable for accredited calibration labs.
Application Areas
Primary users include power transmission companies, renewable energy farms, and large industrial facilities with high-voltage infrastructure. CT testing is mandatory during commissioning of new substations and for periodic maintenance of existing systems. Manufacturers of electrical equipment also use these testers for quality control. Specialized models are available for testing Rogowski coils, low-energy sensors, and hybrid optical-CTs emerging in smart grid applications.
Maintenance and Precautions
Regular calibration (annually or per manufacturer guidelines) is critical to maintain accuracy. Store testers in dry, temperature-controlled environments and avoid mechanical shocks that could damage sensitive components. Always de-energize CTs before testing and use appropriate personal protective equipment (PPE) when working with live circuits. Ensure test leads are in good condition to prevent erroneous readings or safety hazards.
B2B Procurement Guide
When sourcing CT testers, evaluate suppliers based on technical support availability, calibration traceability, and compatibility with your CT inventory (e.g., primary current ranges from 50A to 50kA). Consider total cost of ownership, including software updates and calibration services. Leading brands like Omicron, Megger, and SMC offer modular systems that can be upgraded as needs evolve. For bulk purchases, negotiate service contracts covering on-site training and extended warranties.
Related Manufacturers
- 主营：冲击电压发生器、变频串联谐振、温升试验装置、互感器综合测试仪、局部放电检测仪、直流高压发生器、绝缘靴手套耐压试验装置
- 主营：互感器综合测试仪、变频互感器测试仪、直流电阻测试仪、变压器测试台、变压器变比测试仪、变压器有载分接开关测试仪、互感器综合试验装置
- 主营：电源故障、脉冲耐压、尖峰电压、测试仪、汽车干扰、绝缘耐压、静电放电、雷击浪涌、喀呖分析仪、脉冲衰减器、普锐马电子、短时过电流、阻尼振荡波、电容耦合夹、瞬变脉冲干扰、周波跌落发生器、冲击电流发生器、振铃波发生器、脉冲磁场发生器、工频磁场发生器
- 主营：试验装置、便携式录波仪、直流高压发生器、电阻测试仪、综合测试系统、励磁小电流测试仪、继电保护测试仪、电缆故障测试仪、局部放电测试仪、SF6综合测试仪、互感器综合测试仪、绝缘子测试仪、氧化物避雷器测试仪、变压器综合测试台、绕组变形测试仪、直流电阻测试仪、回路电阻测试仪、工频耐压试验装置、局部放电巡检仪、变频串联谐振、检定装置、电能表校验仪、大电流发生器、冲击电压发生器、变压器材质分析仪
- 主营：开关柜、试验装置、谐振装置、互感器、试验变压器、无局放串联谐振试验装置、GTU无局放高压试验装置
- 主营：电缆故障测试仪、高压开关测试仪、直流电阻测试仪、绝缘电阻测试仪、接地电阻测试仪、互感器测试仪、继电保护测试仪、变压器测试仪、变压器变比测试仪、局部放电测试仪、蓄电池测试仪、电能质量测试仪、sf6气体测试仪、工频耐压试验装置、直流高压发生器
- 主营：电缆耐压测试仪
- 主营：玻璃吸盘、刮板机、支柱、伏安特性测试仪、绞车、传感器、喷浆机、喷涂机、拆缸机、柴油机水泵、乳化液泵站、氢氧化钙、订扣机、液压扳手、真空泵、滑移装载机、电缆夹板、闸瓦、滤液泵、试验台、装载机、气动绞车、变压器、移动变电站
- 主营：充电机、核相仪、测量仪、测试仪、升压器、变压器、超声波、电力承、耐压仪、核相器、分压器、蓄电池、交流耐压、变比组别、工频耐压、串联谐振、电线电缆、打压设备、绝缘耐压、相位伏安、耐压设备、检测设备、武高电力、智能三相、高压试验
- 主营：高压探头、串联谐振、交直流分压器、微机继电保护测试仪、电缆故障测试仪、阻容电压互感器、二通道局部放电测试仪、变压器综合测试台、回路电阻测试仪、电缆绝缘耐压测试仪、水内冷发电机耐压设备、SF6密度继电器检验仪、大电流发生器、无局放分压器、耦合电容器、干式试验变压器、交直流耐压变压器、智能直流高压发生器、分压器、二级承试设备、高压试验检测设备、局部放电巡检仪、电力检测专用套装、工频交流耐压发生装置、高压标准电容器
- 主营：互感器综合测试仪、试验装置
- 主营：直流电阻测试仪、回路电阻测试仪、微机继电保护测试仪、电缆故障测试仪、变压器变比测试仪、变压器绕组变形测试仪、串联谐振交流耐压试验装置、色谱仪
- 主营：高压发生器、交直流分压器、高精度sf6检漏仪、测试仪、串联谐振
- 主营：变压器测试系列、绝缘油测试系列、高压耐压测试系列
- 主营：串联谐振、直流高压发生器、工频耐压试验装置、继电保护测试仪、互感器测试仪、绝缘电阻测试仪、兆欧表