DC Current Analog Panel Voltmeter High Impedance Analog Frequency Meter

91L4 Series Round Analog Panel Meter Panel Meter Description: Uses and applications: This series of meters is a direct imitation of power measurement display instruments, measuring DC current and voltage, AC current and voltage, frequency, power factor, phase sequence power, synchronization instructions and other non-power measurements. It has been widely used in a variety of AC and DC transmission and distribution systems, power control panels and other electrical devices,