Inverter Protection; Motor Protection - Siemens MICROMASTER 440 Operating Instructions Manual

3 Functions
3.5.7.13

Inverter protection

Inverter overload reaction
p0290 = ...
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)
r0036
r0037
Inverter temperature warning
P0292 =...
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
warn
Temperature shutdown threshold of inverter T_trip
Temperature
Heat sink
IGBT
Input rectifier
Cooling air
Control board
Delay, fan shutdown
P0295 = ...
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).
3.5.7.14

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.
108
Inverter monitoring
i 2 t
P0294
Heat sink
temperature
P0292
IGBT
temperature
P0292
= T - P0292
trip
A - C
110 °C 95 °C
140 °C 145 °C
-
-
-
Inverter overload reaction
P0290
i_max control
(U/f)
Current control
(SLVC, VC)
f_pulse
control
MM440, Frame Size
D - F F FX
95 kW 110 kW
600 V
CT
80 °C 88 °C 91 °C
145 °C 150 °C 150 °C
- -
75 °C 75 °C
- - 55 °C 55 °C
- -
65 °C 65 °C
MICROMASTER 440
Issue 10/06
A0504
A0505
A0506
F0004
F0005
15 °C
GX
132 kW 160 kW 200 kW
CT CT CT CT
80 °C 82 °C 88 °C
145 °C 147 °C 150 °C
75 °C 75 °C 75 °C
55 °C 55 °C 50 °C
65 °C 65 °C 65 °C
0 s
Operating Instructions
6SE6400-5AW00-0BP0
0