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
Summary of Contents for SENTRON 3VL series
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Page 350: ...Correction sheet 3VL molded case circuit breakers 350 System Manual 03 2009 110 0110 02 DS 01 ...
Page 358: ...Glossary 3VL molded case circuit breakers 358 System Manual 03 2009 110 0110 02 DS 01 ...
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