Working principle of the automatic dielectric loss tester:
The measurement circuit of the automatic dielectric loss tester includes a standard circuit and a test circuit. The standard circuit consists of a built-in high-voltage stable standard capacitor and a standard resistor network. The computer collects the current amplitude and phase difference of the standard circuit and the test circuit in real time, and calculates the capacitance (CX) and dielectric loss (tgδ) of the tested sample.
The data acquisition circuit uses high-voltage stable components. The acquisition board and acquisition computer are completely floating shielded by an iron box, and the instrument shell is grounded and shielded. In addition, anti-interference technologies such as optical data transmission, floating ground, large-area ground, single-point ground, and digital filtering are used. Combined with the computer processing data from hundreds of power grid cycles, the measurement results are stable, accurate, and reliable.
