External Fault 2; Stall Protection; Motor Thermal Protection - ABB ACS350 User Manual

116
External Fault
External Faults (1 and 2) can be supervised by defining one digital input as a source
for an external fault indication signal.
Settings
Parameters

Stall Protection

The drive protects the motor in a stall situation. It is possible to adjust the supervision
limits (frequency, time) and choose how the drive reacts to the motor stall condition
(alarm indication / fault indication & drive stop / no reaction).
Settings
Parameters

Motor Thermal Protection

The motor can be protected against overheating by activating the Motor Thermal
Protection function.
The drive calculates the temperature of the motor on the basis of the following
assumptions:
1) The motor is in the ambient temperature of 30
drive.
2) Motor temperature is calculated using either the user-adjustable or automatically
calculated motor thermal time constant and motor load curve (see the figures
below). The load curve should be adjusted in case the ambient temperature exceeds
30°C.
Motor
load
100%
Temp.
rise
100%
63%
Settings
Parameters
Note: It is also possible to use the motor temperature measurement function. See
section
Program features
3003 EXTERNAL FAULT 1 and
3010...3012
Motor thermal time constant
3005...3009
Motor temperature measurement through the standard I/O
3004
Motor
150
current
(%)
100
50
t
Zero speed load
t

EXTERNAL FAULT 2

°
C when power is applied to the
Break point
Motor load curve
Speed
on page 124.