Product Description: A harmonic filter can be applied that reduces or cancels out the current gulps. The filter can be either passive or active. Usually it won't completely smooth the waveform, but is designed to minimize the specific harmonics that are the greatest offenders. Technique Parameters: 1.Rated Voltage: 250V / 440V, 690V / 1140V 2.Operating Frequency: 0 - 120Hz 3.Switching Frequency: Fmax=60KHz 4.Current range: 1A-50A 5.Test Voltage(1 min): line / ground 2250VDC,line / line 1500VDC 6.Temperature range: -25 to 85 degree C 7.Insulation resistance: line-ground(below 300A) more than 1500MOhm 8.Standard: DIN EN 60939-2 / UL1283 / CSA C2213 NO.8 Other Information: 1.Payment:T/T,Western Union,Paypal 2.Delivery Date:5-7days,according to the product specific design 3.Package:standard packing or customized 4.Express:Fedex,TNT,UPS,DHL,EMS