Three-phase voltage measurement (VMMXU) - Arc protection - Merging unit - Transformer protection - 2 winding - Product Guide - RET615 Transformer Protection and Control - 5.0 FP1 IEC - IEC - 09.02.2023

RET615 Product Guide

Table 1. Three-phase voltage measurement (VMMXU)
Characteristic Value
Operation accuracy

Depending on the frequency of the voltage measured: fn ±2 Hz

At voltages in range 0.01…1.15 × Un

±0.5% or ±0.002 × Un

Suppression of harmonics

DFT: -50 dB at f = n × fn, where n = 2, 3, 4, 5,…

RMS: No suppression