Relay is an electrical device whose main function is to control small current to large current, thereby realizing the identification and conversion of signals in the circuit. It uses the principle of electromagnetic induction and uses the interaction between the current of the winding and the magnet

In low-voltage power grids, circuit breakers are widely used for overload and short-circuit protection. However, if the circuit breaker is improperly selected, it may cause malfunction or refuse to operate, losing its protective function and reducing the reliability of the power supply. The general

When the transformer suffers a sudden short circuit, both the high and low voltage sides will be subject to a large short circuit current. In a short period of time before the circuit breaker has time to open, the short circuit current generates an electric force proportional to the square of the cu

In power systems, high-voltage withstand tests are usually routine test items. Ultra-low-frequency high-voltage generators are used to conduct high-voltage withstand tests. The test process is fully automated, which reduces the work intensity for testers and increases work safety. . Ultra-low frequency high voltage generator has the advantage of its withstand voltage test....