Condensation Protection - Siemens SINAMICS G120XA Operating Instructions Manual

6.3.4

Condensation protection

Overview
Condensation is a serious problem for motors in the humid and cold environment, resulting in
motor failure. This problem can be avoided by slightly increasing the surface temperature of the
motor during work break. If an external condensation sensor detects excessive condensation,
the converter applies a DC current to keep the motor warm to prevent condensation.
Precondition
Before enabling the condensation protection, make sure that p0840 = r29659.0, p0844 =
r29659.1, p1143 = r29640.0 and p1144 = r29641.
Function description
● OFF1/OFF3: OFF3 disables the condensation protection function while OFF1 enables this
function again.
● OFF2/fault: The motor stops and the condensation protection function is deactivated.
If the converter is not running and the protection signal becomes active, protection measure is
applied as follows:
● If frost protection speed p29623 ≠ 0 (default 0), frost protection is activated by applying the
specified speed to the motor.
● If frost protection speed p29623 = 0 and condensation protection current p29624 ≠ 0,
condensation protection is activated by applying the specified current to the motor.
SINAMICS G120XA converter
Operating Instructions, 03/2019, FW V1.0, A5E44751205B AB
Advanced commissioning
6.3 Pump control
219