Three-phase undervoltage protection (PHPTUV) main settings - Arc protection - Merging unit - Transformer protection - 2 winding - Product Guide - RET615 Transformer Protection and Control - Relion 615 series - 5.0 FP1 IEC - IEC - 24.05.2023

RET615 Product Guide

Table 1. Three-phase undervoltage protection (PHPTUV) main settings
Parameter Function Value (Range) Step
Start value PHPTUV 0.05...1.20 × U n 0.01
Time multiplier PHPTUV 0.05...15.00 0.01
Operate delay time PHPTUV 60...300000 ms 10
Operating curve type PHPTUV

Definite or inverse time

Curve type: 5, 15, 21, 22, 23

1 For further reference, see the Operation characteristics table