(b) the exchange of constant currents is based on the swm high-frequency pulse wide-modulation method, which allows for the modulation of output currents and frequencies, speed of response, high constant current accuracy and long-term stability; and is capable of overcoming current changes due to voltage fluctuations in the electricity grid, changes in circuit resistance, changes in internal resistance in products, and is unaffected by human factors; places used primarily for the testing and application of electrical current thermal effects of specific products, such as circuit breakers, smelters, protective switches such as heat relays, magnetic starters and various transformers, where thermal effects such as rated currents, motion currents, short circuit currents, etc. Need to be tested; low-pressure electrical manufacturing enterprises, electrical detection agencies, electrical research units, physical training bases in higher education; characterization and verification equipment for plastic-hull breakers, instantaneous performance testing and verification equipment for small breakers, and streamlined production detection lines。
