Motor Overload Protection; Drive Overload Protection - ABB ACS 400 User Manual

R Motor Overload Protection
If the motor current I
out
ACS 400 automatically protects the motor from overheating by tripping.
The trip time depends on the extent of the overload (I
given apply to a "cold start".
I
1.5
1.0
0.5
0
S Drive Overload Protection
I
out
I
max
1,5
1.4
1.3
1.2
1.1
1.0
20
exceeds nominal current I
/ I
out N
0
t
I
max
I
2
T
/ I
2
Heavy Duty rating
Normal Duty rating
0.1 0.2 0.3 0.4 0.5
http://nicontrols.com
of the motor for a prolonged period, the
N
/ I ), the output frequency and f
out N
Output frequency
35 Hz
time
Duty cycle
. Times
nom
Duty cycle = t/T
<
T 10 min
Ambient temperature,
θ
max. is 104 °F (40
amb
°
122 °F (50 C) is permissible,
if I is derated to 90%.
2
ACS 400 User's Manual
°
C).