Siemens SIMATIC ET 200pro - Figure 10-2: Tripping Classes

SIMATIC - ET 200pro motor starter
10-6 GWA 4NEB 950 5661-02 DS 04
Tripping class (can only be parameterized for high feature motor starters)
The ’tripping class’ (CLASS) indicates the maximum time to disengagement in
which a safety device must trip with 7.2 times the current setting from the cold
state (motor protection complying with IEC60947). The tripping characteristics
show the time to disengagement depending on the tripping current.
Figure 10-2: Tripping classes
Note
The setting options of the tripping classes depend on the motor starter and cur-
rent range:
Motor starter CLASS
DSe ST, RSe ST 10 fixed
DSe HF, RSe HF
sDSSte / sDSte,
sRSSte / sRSte
5, 10, 15, 20 parameteriz-
able
3-pin symmetric
load
2-pin load
(failure of a phase or current
asymmetry > 40%)
x I
e
t
A
1
2
5
10
20
50
12 580.7
1
2
5
10
20
50
100
120
SMin.
15
10
5
CLASS
CLASS 20
x I
e
1
2
5
10
20
50
12 580.7
1
2
5
10
20
50
100
120
SMin.
15
10
5
CLASS
t
A
CLASS 20