Siemens SIPROTEC 5 Technical Data Manual page 80

Tolerances for Stage Type Inverse-Time Undervoltage Protection
Voltages
Currents
Operate time for 0 < V/V
Reset time delay
SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-A, Edition 05.2018
< 0.9
Thresh
11.20 Undervoltage Protection with 3-Phase Voltage
0.5 % of the setting value or 0.05 V
1 % of the setting value or 5 mA (I
(I = 5 A, f ± 10 %), valid for protection-class
rated rated
current transformers
1 % of the setting value or 0.1 mA (I
0.5 mA (I = 8 A, f ± 10 %), valid for instrument
rated rated
transformers
5 % of the setting value or 30 ms
1 % of the setting value or 10 ms
Technical Data
= 1 A) or 25 mA
rated
= 1.6 A) or
rated
1175