Technical Features: 1, the output current is constant, the output waveform is pure sine wave, can be used as an over-current detection instrument. 2, can bring resistance, inductive, capacitive load, to meet the requirements of low-voltage electrical appliances to the test power supply. 3, outstanding advantages, high steady flow accuracy, 0.5% level. To keep the output current constant. Fast response, to meet all kinds of testing requirements. 5, can be different current levels of automated testing (items: Voltage, current, frequency, rise and fall time, cycle test operation)6, frequency adjustable range: 40-500 hz (optional) , fixed output: 50HZ, 60HZ (more range of fixed output frequency can be designed according to User's demand)7, can set analog (signal) control and RS232, RS485 technical parameters: Model HJ56-100V/3000A circuit mode IGBT/PWM pulse width modulation mode, aC input, phase line, three-phase four-wire + ground line, voltage 380V ± 10% , 50Hz ± 10% & NBSP; AC output, phase line, three-phase four-wire, open-phase phase voltage 100V (L-N) current 30 ~ 3000A & NBSP; three-phase can be adjusted independently, current accuracy ≤1% FS power supply efficiency ≥90% protection system: electronic circuit fast detection & AMP; NBSP; over-voltage, over-current, over-temperature, automatic cut-off output and alarm. Cooling device, forced fan cooling, noise < 65DB (1m in front of equipment) IP20 Working Environment & AMP; NBSP; temperature-10 ~ 50 °C & NBSP; amp; & NBSP; amp; amp; amp; amp; & NBSP; & NBSP; amp; & NBSP; & NBSP; Humidity 0 ~ 90% (non-condensable) below 1500 M