
SINUS PENTA
PROGRAMMING GUIDE
386
/
486
44. MOTOR
THERMAL
PROTECTION
MENU
44.1.
Overview
The Motor Thermal Protection function protects the motor against overloads.
Some Sinus Penta models offer the possibility to set the heatsink temperature for the activation of cooling fans.
All relevant parameters are included in the Motor Thermal Protection menu.
NOTE
Each connected motor has its own thermal model.
If the drive is used to control only one motor and its control mode is selected through the
selection of the different motors, the motor thermal protection is ensured by setting PTC
protection for all motors.
For each programmable motor, thermal protection can be configured in 4 modes, which can be selected with parameter
C265
(or
C268
or
C271
for motor 2 and 3 respectively), depending on the cooling system being used (configuration
modes 1, 2 and 3):
Value Descr.
IEC 34-6
Compliance
Description
0:NO
[NO]
-
The Motor Thermal Protection function is disabled;
1:YES
[No
Derated]
IC410
The Motor Thermal Protection function is active with trip current
It
independent of
operating speed (No derating);
2:YES
A
[Forced
Cooled]
IC411
The Motor Thermal Protection function is active with trip current
It
depending on
operating speed, with fan-cooled motor de-rating (Forced Cooling);
3:
YES
B
[Fan Shaft]
IC416
The Motor Thermal Protection function is active; trip current
It
depends on
operating speed and de-rating is suitable for motors having a fan keyed to the
shaft (Fan on Shaft) (factory setting).
When
C265
=1, 2 and 3, the motor thermal model is considered. The heating of a motor is proportional to the square of
the current flowing (I
o
2
). The Motor overheated alarm (
A075
) will trip after the time “t” computed based on the motor
thermal model is over.
The alarm can be reset only after a given time depending on the thermal constant (
C267
) of the motor, thus allowing for
the correct cooling of the motor.
Figure 66: Trip current drop depending on speed values
Содержание PENTA MARINE
Страница 173: ...PROGRAMMING GUIDE SINUS PENTA 173 486 Figure 27 Response to the step based on the value of Kp when Ti is kept constant...
Страница 196: ...SINUS PENTA PROGRAMMING GUIDE 196 486 Figure 34 ANALOG Mode Figure 35 DOUBLE DIGITAL Mode...
Страница 197: ...PROGRAMMING GUIDE SINUS PENTA 197 486 Figure 36 General structure of the parameterization of a digital output...