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Hkk-AC220V/380V Jkw5c Power Factor Checking Meter Compensation Controller. Advanced Control Parameters: Target Cos 0.70-1.00, switching delay 1-250s, sensitivity 100mA, auto compensation. Comprehensive Protection: Features overvoltage (380-500V), undervoltage (340V/180V) protection with recovery. Flexible CT & Capacitance: CT ratio 50/5A-4000/5A; capacitance 0-125kvar/branch with 5Kvar factory preset. Leading Domestic Technology: Novel design with high reliability, leading position in domestic similar products. OEM/ODM Customization: Supports OEM and ODM services for customized power factor checking meters.