Siemens SENTRON 3VL - Ground Fault Protection Classes

Technical data
12.18 Ground fault protection classes
3VL molded-case circuit breakers
188 System Manual, 03/2009, 110 0110 - 02 DS 01
12.18 Ground fault protection classes
There are different ground fault protection classes for the individual overcurrent trip units:
Table 12- 52 Overview of ground fault protection classes
Trip unit Ordering data Ground fault protection class
ETU22 SG, MG
1)
Vectorial summation current formation (3-conductor
system)
ETU22 SH, NH
1)
Vectorial summation current formation (4-conductor
system)
ETU22 TH, NH
1)
Vectorial summation current formation (4-conductor
system)
LCD-ETU42 CL Vectorial summation current formation (3-conductor
system)
LCD-ETU42 CM Vectorial summation current formation (3-conductor
system)/direct recording of the ground-fault current in the
neutral point of the transformer
LCD-ETU42 CN Vectorial summation current formation (4-conductor
system)
1
With communication