high-power, low distortion, high stability AC power sources,suit for ballast, energy ... bits MCU, which has high automation4. High speed 12 bits A/D sampling technology,exactly display Voltage5. Current, Power, Power factor, ... voltage range:AC 0-300V12. CHP-500 Output biggest current:0-150V is 4.2A,0-300V is 2.1A13 ... . CHP-1000 Output biggest current:0150V is 8.4A,0-300V is 4.2A14. ...