Our company CTPT accuracy testing system is used for Error test (Ratio error and Phase error) of the CT&PT,  The Bench can be installed: HES-1C Transformer Tester, FY49 CT Burden, FY95 PT Burden The whole system including the HES-30 CT/PT Testing Bench, HES-1C Transformer Calibrator, FY47-49 CT Burden, HLS-60G2 Standard CT (with Current Generator), FY95 PT Burden and HJS-33G3 Standard PT (with Voltage Generator) Test Range: Measure Item Test Range   CT accuracy test Rated primary current range: 5A-6300A Rated secondary current: 5A and 1A Operation range: (1%-120%).In   PT accuracy test Rated primary voltage (kV): 6.3(6.3/√3), 11(11/√3), 33(33/√3)kV Rated secondary voltage: 100V, 100/√3V, 110V, 110/√3V Operation range: (20%-120%).Un Accuracy class of the measure equipments: Product Description Product Model Accuracy Class Standard CT (with Current Source) HLS-60G2 ±0.02S% Standard PT (with Voltage Source) HJS-33G2 ±0.02% CT Burden FY47-49 ±3% PT Burden FY95 ±3% Transformer Tester (Calibrator) HES-1C ±2%