DESCRIPTION:- It is a Combined Voltage, Current & Frequency meter. The meter incorporates micro-controller to measure & indicate these parameters simultaneously on three separate LED displays. BASIC FUNCTIONS OF VOLTAGE TRANSFORMERS ARE . . . Requires only one meter instead of three meters to indicate Voltage, Current and frequency Reduces panel Wiring. Isolation is provided for AC current input by 1 Amp or 5 Amp inbuilt CT.