The 3U(3I) combined meter is used to measure and display the direct digital reading of voltage/current value in the three-phase electrical line. The UIF combined meter is used to measure and display the direct digital reading of voltage, current, and frequency values in the single-phase electrical line. One meter can finish the measuring tasks of three common meters. It can support the analog output, alarm, and RS485 communication function by the installation of different functional modules. And it can also select multiple functional modules at the same time to make it with the alarm, transmitting, and communication functions
Chapter 2.Model and definition
Chapter 3.General parameters
Input specifications of voltage: AC100V, 220V, or 380V (external PT is necessary if more than 500V)
Input specifications of current: AC 1A ~ 5A (external CT is necessary if more than 5A)
Communication interface: RS485 serial communication, MODBUS-RTU communication protocol
Frequency of Input signal: 45 ~ 65Hz
Accuracy: class 0.5
Alarm output: relay contact output, contact capacity AC 250V/1A; DC 30V/1A, resistive load.
Transmitting output: Linearity 0.5%, load resistance, Output Current ≤ 300Ω, Output Voltage ≥ 1kΩ which are electrical isolated the input signal and the auxiliary power supply.
Switch input: dry contact input