Three-phase overvoltage protection (PHPTOV) 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 - 09.02.2023

RET615 Product Guide

Table 1. Three-phase overvoltage protection (PHPTOV) main settings
Parameter Function Value (Range) Step
Start value PHPTOV 0.05...1.60 × Un 0.01
Time multiplier PHPTOV 0.05...15.00 0.01
Operate delay time PHPTOV 40...300000 ms 10
Operating curve type 1 PHPTOV

Definite or inverse time

Curve type: 5, 15, 17, 18, 19, 20

1 For further reference, see the Operation characteristics table