Description:

The transformer core grounding current tester is specially designed and manufactured for the on-line test of the transformer core grounding current, leakage current, frequency and waveform in the power system. It consists of the host computer, current clamp, data software and communication line. Power transformers are important electrical equipment in power systems. Once a fault occurs in operation, it will have serious consequences for the power system. The normal operation of the transformer core is grounded at a single point. If there are two or more points at the same time, the current loop will be formed between the core and the earth. The high current can reach several tens of amperes, which will cause the core to overheat. Even burned. The instrument can quickly find the fault of the transformer's latent fault, which is the main tool to ensure the safe operation and normal maintenance of the transformer. It is mainly used for leakage current testing of iron cores and clamps of substations and power plants as electrical equipment such as transformers and reactors. It can also be used for current and leakage current testing of lines or equipment in electric power, communication, meteorology, railway, oil field, construction, measurement, scientific research and teaching units, industrial and mining enterprises.

The host adopts high-speed microprocessor, 3.5-inch color LCD screen, which can display the current magnitude and waveform of the measured current in real time; using FFT transform, digital filtering and other technologies to make the test data more accurate; with alarm threshold setting and alarm indication function; It has date and time setting function; it has automatic shutdown function; it has the function of setting sample number; it can store 200 sets of data and waveform.

The current clamp adopts special alloy and adopts new magnetic shielding technology. The external magnetic field has little influence and strong anti-interference ability, ensuring high precision, high stability and high reliability of uninterrupted measurement throughout the year. The inner diameter of the jaw is φ52mm, which can clamp the cable or grounding wire of φ52mm or less. The portable clamp design eliminates the need to disconnect the line under test, non-contact measurement, safe and fast.

The data software has historical data query function, dynamic display, waveform indication; with alarm value setting and alarm indication; with historical data reading, reviewing, saving, printing and other functions.