... trigger plate is using digital circuit trigger thyristor realizevolatage-regulation controller ,;2. Voltage regulating using phase shifting control mode, the panel ... : ≥2000vac 1min, ≥2500vac 1minOperating temperature : -40°C---80°CStorage:Good ventilation, no radiator, no corrosive, moisture capability, 90 percent RH, no ... directly,any quertion will be appreciated. Three-phase SCR Trigger Controller