ABB ACS 400 - Motor Overload Protection; Drive Overload Protection

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