Three-phase voltmeter ИЦ404

Purpose:

• Intended for measuring the RMS phase-to-neutral and phase-to-phase voltages in a three-phase network with a solidly earthed neutral, with a built-in input selector between phases.

Key features:

• Built-in input selector between phases for star and delta connection.
• Replaces three moving-coil voltmeters.
• Voltage shown on a three-digit display.
• Powered from one phase, (100–265) V.
• Panel mounting with rear terminals.
• The RMS voltage is found by sampling the voltage many times per cycle and processing the results mathematically in real time.

Documentation:

• Short datasheet for three-phase voltmeter ИЦ404
• Replacing 132×132 and 172×172 panel-mount moving-coil instruments with digital panel instruments made by NPP "VEL"