Siemens SENTRON 3VL System Manual page 49

Order No. Trip unit
supplement
SG
ETU22
MG
ETU22
SH
ETU22
MH
ETU22
TH
ETU22
NH
ETU22
SS ETU30M
3)
MS ETU30M
3)
CP LCD-ETU40M
CH LCD-ETU40
CJ LCD-ETU40
CL LCD-ETU42
CM LCD-ETU42
CN LCD-ETU42
Dependent on frame size
1)
TM to I
2)
Motor protection to I
3)
With COM20/COM21
4)
With COM10/COM11
5)
① Vectorial summation current formation (3-conductor system), see 1st figure in Chapter
Ground-fault protection (Page 58)
② Vectorial summation current formation (4-conductor system), see 2nd and 3rd figures in
Chapter Ground-fault protection (Page 58)
③ Direct capture of the ground fault current in the neutral point of the transformer, see 4th
figure in Chapter Ground-fault protection (Page 58)
3VL molded-case circuit breakers
System Manual, 03/2009, 110 0110 - 02 DS 01
Thermal Phase failure
memory
✓ -
✓ -
✓ -
✓ -
✓ -
✓ -
✓ 40% I
✓ 40% I
✓ 5 to 50% I
3)
✓ -
✓ -
✓ -
✓ -
✓ -
= 630 A
n
= 500 A
n
Communicati
ons capability
-
✓
4)
-
✓
4)
-
✓
4)
-
R
✓
4)
R
✓
5)
R
✓
5)
✓
5)
✓
5)
✓
5)
✓
5)
5.1 Current protection
Ground- Number N pole
fault of poles protected
protection
① 3 -
① 3 -
① 3 -
① 3 -
② 4 50 / 100 %
② 4 50 / 100 %
- 3 -
- 3 -
- 3 -
- 3 -
- 4 50 /100 %, OFF
① 3 -
① / ③ 3 -
② 4 50 / 100%, OFF
Functions
1)
49