Siemens SENTRON 3VL series - Leading Auxiliary Switches in Front-Operated Rotary Operating Mechanism; Ground-Fault Detection

Technical data
11.15 Leading auxiliary switches in front-operated rotary operating mechanism
3VL IEC molded case circuit breakers
166 System Manual, 11/2013, 110 0110 - 02 DS 03
11.15
Leading auxiliary switches in front-operated rotary operating
mechanism
Technical data of the leading auxiliary switches in front-operated rotary operating mechanism:
Table 11- 44 Leading auxiliary switches in front-operated rotary operating mechanism
Rated operating voltage [V] AC
230
Thermal rated current I
th
[A]
2
Rated making/breaking capacity
Resistive [A]
2
Inductive [A] cos φ = 0.7
0,5
Rated operating voltage [V] AC
230
Rated operating current [A]
2
Quick-response backup fuse [A]
2
11.16
Ground-fault detection
The individual overcurrent releases have different ground-fault detection:
Table 11- 45 Overview of ground-fault protection classes
Release
Ordering data
Ground-fault detection
ETU22 SG, MG Vectorial summation current formation (3-conductor
system)
ETU22 SH, NH Vectorial summation current formation (4-conductor
system)
ETU22 TH, NH Vectorial summation current formation (4-conductor
system)
LCD-ETU42 UL Vectorial summation current formation (3-conductor
system)
LCD-ETU42 UM Vectorial summation current formation (3-conductor
system)/direct recording of the ground-fault current in the
neutral point of the transformer
LCD-ETU42 UN Vectorial summation current formation (4-conductor
system)