WEG SRW 01, User Manual

Page: 93 / 148

Parameterization
SRW 01 | 5-47
5
Class 45
Class 40
Class 35
Class 30
Class 25
Class 20
Class 15
Class 10
Class 5
Current
x In
9x 8x 7x 6x 5x 4x 3x 2x 1x
1
10
100
1000
Time
t(s)
0.1
Figure 5.24: Tripping classes for warm motor protection with 100 % In
Table 5.15: Time multiplying factor for warm tripping classes
Current in % of the Motor In Factor
0 % (cold) 1
20 % 0.87
40 % 0.74
60 % 0.61
80 % 0.48
100 % (full load) 0.35
NOTE!
When using a motor with PTC thermal sensors connected to the SRW 01, there is no need to enable
the tripping classes, therefore, adjust P640 = 0.
NOTE!
In order to correctly program the tripping class that will protect the motor, it is essential to have
available the motor locked rotor time. This data is available in the motor manufacturer catalog.
NOTE!
The thermal protection adopts the standard three-phase IP55 WEG motor as a model, therefore, if the
used motor is different do not program the tripping class at the maximum, but next to the minimum
tripping class necessary for starting the motor.