MICROMASTER 440 - Siemens AS

Issue 10/06
6 Commissioning
6.4.13 Inverter protection
P0290 = ...
Inverter overload reaction
Selects reaction of inverter to an internal over-temperature.
0 Reduce output frequency
1 Trip (F0004 / F0005)
2 Reduce pulse frequency and output frequency
3 Reduce pulse frequency then trip (F0004)
Inverter monitoring
Inverter overload reaction
P0290
0
r0036
r0037
i 2 t
P0294
Heat sink
temperature
P0292
IGBT
temperature
P0292
i_max control
(U/f)
Current control
(SLVC, VC)
f_pulse
control
A0504
A0505
A0506
F0004
F0005
P0292 =...
Inverter temperature warning
15 °C
Defines the temperature difference (in ºC) between the Overtemperature trip threshold and
the warning threshold of the inverter. The trip threshold is stored internally by the inverter
and cannot be changed by the user.
Temperature warning threshold of inverter T_warn
T = T - P0292
warn
trip
Temperature shutdown threshold of inverter T_trip
Temperature
Heat sink
A - C
110 °C
D - F
95 °C
MM440, Frame Size
F
FX
600 V 95 kW 110 kW 132 kW
CT CT CT
80 °C 88 °C 91 °C 80 °C
GX
160 kW
CT
82 °C
200 kW
CT
88 °C
IGBT
140 °C
145 °C
145 °C
150 °C
150 °C
145 °C
147 °C
150 °C
Input rectifier -
-
-
75 °C
75 °C
75 °C
75 °C
75 °C
Cooling air -
-
-
55 °C
55 °C
55 °C
55 °C
50 °C
Control board -
-
-
65 °C 65 °C
65 °C 65 °C
65 °C
P0295 = ...
Delay, fan shutdown
0 s
This defines the delay time in seconds between powering down the frequency inverter and
then powering-down the fan. A setting of 0 means that the fan is immediately shut down
(powered-down).
6.4.14 Motor protection
In addition to the thermal motor protection, the motor temperature is also included
in the adaptation of the motor equivalent circuit diagram data. Especially for a high
thermal motor load, this adaptation has a significant influence on the degree of
stability of the closed-loop vector control. For MM440 the motor temperature can
only be measured using a KTY84 sensor. For the parameter setting P0601 = 0,1,
the motor temperature is calculated / estimated using the thermal motor model.
If the frequency inverter is permanently supplied with an external 24V voltage, then
the motor temperature is also tracked/corrected using the motor temperature time
constant – even when the line supply voltage is switched-out.
MICROMASTER 440
Operating Instructions (Compact) 45