1. TRANSFORMER TURNS RATIO METER Transformer turns ratio is the ratio of the number of turns in the high voltage winding to that in the low voltage winding. Accurate Measurements of 1 Phase and 3 Phase Transformer / CT & PT Turns Ratio. Turns Ratio Range : 1 to 4000, 5 digit resolution (for transformers / CT & PT testing). Excitation Voltage & Current Range : 6 V AC, 250mA @ 50Hz (Other Range Available on Request) (Input: 230V @ 50Hz). Switch for Test ON/OFF, Hold, Parameters-1 & Parameters-2. Inbuilt Over Current Protection for Shorten Winding Test ON, Polarity Reverse & Measurement Hold Indication. 16 X 2 Jumbo LCD for viewing Parameters easily. Parameter to be Measured : Tr (Turns Ratio), mA (Excitation Current), HV (Applied Voltage in HV Side, LV (Measured Voltage in LV Side). Accuracy : ± 0.1% reading ± 0.1% range.. Accessories : Test Lead with Crocodile Clamp, Mains Cord, Instruction Manual. Compliance to ANSI/IEEE C57.12.90 and IEC 600076.1 (2000) & Other Standards.