220/380VAC input
Sturdy and durable
With low frequency protection function
Slow start
Built-in harmonic suppressor
Built-in40 A fuse

technical parameter：
Power supply voltage : 180-276VAC
Sampling voltage : 220 / 380V switch by jumper
Excitation output : voltage max . 170VDC @ 240V
Current Continuous 20A
Non-continuous 40A10 seconds
Resistance Minimum 6 ohms , maximum 100 ohms
Voltage regulation accuracy : less than+/-1% ( frequency variation within 4% )
Voltage build-up : residual voltage must be greater than 5V25 Hz
External voltage regulation : maximum + / -10% @ 1 KQ1W
Potentiometer voltage settling time : 4 seconds
Maximum static power consumption : 8W
EMI : Built-in harmonic suppressor
Low frequency protection : 50HZ inflection point value is 44H60HZ knee value is 54HZ