Specifications current transformer 1. Primary current: 75--5000A; second current: 5A,1A 2. Rating operational voil: AC660V 3.current ratio: ALH-0.66 III series current transformer specifications Technical data 1. Primary current: 75--5000A; second current: 5A,1A 2. Rating operational voil: AC660V 3. Rated frequency: 50--60Hz 4. Ambinet air temperature is -30 -- +70 ;heat resist: 120 5. The altitude is less than 3000M 6. Power frequency withstand voltage 3000V/1 min 50Hz 7. Grade of insulation : E more details pls contact us