Siemens SIPROTEC 4 7UT6 Series User Manual

Frequency Influence referring to k · Ι
N
Frequency in range 0.9 ≤ f/f
N
≤ 1.1 1 % at f
N
= 50/60 Hz
3 % at f
N
= 16.7 Hz (only 7UT613/63x)
Characteristic
[ausloesekennlinie-ueberlast-170502-wlk, 1, en_GB]
Figure 4-18
Trip time characteristic of thermal overload protection
t Tripping time
τ Thermal time constant
I Load current
Ipre Previous load current
k Setting factor according to IEC 60255-8
IN Rated current of protected object
Technical Data
4.9 Thermal Overload Protection
SIPROTEC 4, 7UT6x, Manual 441
C53000-G1176-C230-5, Edition 09.2016

Siemens SIPROTEC 4 7UT6 Series Specifications

General

Brand	Siemens
Model	SIPROTEC 4 7UT6 Series
Category	Protection Device
Language	English