HYG-151 transformer core grounding current tester is specially designed and manufactured for on-line measurement of transformer core grounding current, leakage current, frequency and waveform in power system. It consists of mainframe, current clamp, data software and communication line. Power transformer is the most important electrical equipment in the power system. Once a fault occurs in operation, it will cause serious consequences to the power system. The transformer core in normal operation is grounded at a single point. If two or more points are grounded at the same time, a current loop will be formed between the core and the earth. The maximum current can reach tens of amperes, which will cause partial overheating or even burnout of the core. The instrument can detect the latent faults of transformers as soon as possible. It is the main tool to ensure the safe operation and normal maintenance of transformers. It is mainly suitable for leakage current testing of core and clamp of transformer and reactor in substation and power plant. It can also be used to test the current and leakage current of electric power, communication, meteorology, railway, oil field, construction, measurement, scientific research and teaching units, industrial and mining enterprises and other fields.
The host computer uses a high-speed microprocessor and a 3.5-inch color LCD screen, which can display the size and waveform of the measured current in real time; uses FFT transform and digital filtering technology to make the test data more accurate; has the function of setting alarm threshold and alarm indication; has the function of setting date and time; has the function of automatic shutdown; has the function of setting sample number; can store data and waveform 200; Group.
The current clamp adopts special alloy and the latest magnetic shielding technology. The external magnetic field has little influence and strong anti-interference ability, which ensures the high accuracy, high stability and high reliability of uninterrupted measurement all the year round. The caliber of the clamp is 52mm. It can clamp the cable or grounding wire below 52mm. Portable clamp design does not need to disconnect the measured line. It is non-contact measurement, safe and fast.
The data software has the functions of Querying Historical data, dynamic display, waveform indication, setting alarm value and alarm indication, reading, consulting, saving and printing historical data, etc.
