Siemens SINAMICS G110D, Operating Instructions Manual

Page: 124 / 224

Functions
6.8 Protection functions
SINAMICS G110D
124
Operating Instructions, 07/2016, FW V3.63, A5E36768472B AB
Parameters Description
P0290 = 0, 2:
• Reduction of output frequency is only effective if the load is also reduced. This is
for example valid for light overload applications with a quadratic torque character-
istic as pumps or fans.
•
For settings P0290 = 0 or 2, the I-max controller will act upon the output current
limit (r0067) in case of overtemperature.
P0290 = 0:
• With pulse frequencies above nominal, pulse frequency will be reduced to nomi-
nal immediately in the event of r0027 greater than r0067 (current limit).
P0290 = 2, 3:
•
The pulse frequency P1800 is reduced only if higher than 2 kHz and if the operat-
ing frequency is below 2 Hz.
• The actual pulse frequency is displayed in parameter r1801[0] and the minimal
pulse frequency for reduction is displayed in r1801[1].
•
Inverter I
2
t acts upon output current and output frequency, but not on pulse fre-
quency.
A trip will always result, if the action taken does not sufficiently reduce internal tem-
peratures.
P0292 Parameterizes the alarm threshold for heatsink and module temperature monitoring
Temperature monitoring for the motor
The implementation of thermal protection for the motor is accomplished using the following
types of thermal sensors:
● PTC sensor
● KTY 84 sensor
● ThermoClick sensor
● PT1000 sensor