Overtemperature Protection For The Inverter - Siemens SINAMICS G110D Operating Instructions Manual

Functions
6.8 Protection functions
6.8.2

Overtemperature protection for the Inverter

Temperature monitoring for the inverter
Parameter
P0003 = 3
P0290 = 2
106
Description
User access level
3: Expert
Temperature monitoring of the Inverter
Selects reaction of inverter to an internal thermal overload condition.
0: Reduce output frequency and output current
1: No reduction, trip (F0004/ 5/ 6) when thermal limits reached
2: Reduce pulse frequency, output current and output frequency
3: Reduce pulse freq. only and trip (F0006) when overload too high
The following physical values influence the inverter overload protection (see diagram):
Heat sink temperature (r0037[0]); causes A0504 and F0004.
•
IGBT Junction temperature (r0037[1]); causes F0004 or F0006.
•
Delta temperature between heat sink and junction temperature; causes A0504 and
•
F0006.
Inverter I t (r0036); causes A0505 and F0005.
• 2
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 characteristic 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 nominal
•
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 operating
•
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 t acts upon output current and output frequency, but not on pulse
• 2
frequency.
A trip will always result, if the action taken does not sufficiently reduce internal
temperatures.
Operating Instructions, 2009-05-15, A5E02385577A AB
SINAMICS G110D