... machine & power supply 2.Low price & high quality Bias voltage power supply Main features:Our company design WT series vacuum ... 3 phase 4 wire, 380V±10%(2) Output Voltage: operating voltage 200~800V,open-circuit voltage>1KV(3) Output:single –stage pulse power ... , External analog control, control by external 0~5V analog voltage.3,External digital communication control. RS232,485 or Optical control ...