Siemens SINAMICS G130 Engineering Manual page 65

It is absolutely essential to make the correct settings.
If I is set too low, there is a risk that the converter or infeed will be tripped erroneously
R
when it is operating under high continuous load conditions. This can result in damage to
the installation or to the converter/infeed.
Very high setting values for the short-time delayed short-circuit current I
associated delay time t
sd
therefore lead to significantly more extensive equipment damage.
Fundamental Principles and System Description
delay the response of the circuit breaker unnecessarily and can
Engineering Information
and the
sd
SINAMICS Engineering Manual – November 2015
Electronic trip unit
ETU25B
65/528
Ó Siemens AG