338 Technical data
Sizing
Drive sizing is based on the rated motor current and power. To achieve the rated
motor power given in the table, the rated current of the drive must be higher than or
equal to the rated motor current. The rated power of the drive must also be higher
than or equal to compared to the rated motor power. The power ratings are the same
regardless of the supply voltage within one voltage range.
In multimotor systems, the drive output current rating
I
LD
must be equal to or greater
than the calculated sum of the input currents of all motors.
Note
:
• The maximum allowed motor shaft power is limited to 1.5 ·
P
N
.
If the limit is
exceeded, motor torque and current are automatically restricted. The function
protects the input bridge of the drive against overload.
• The ratings apply at ambient temperature of 40 °C (104 °F) for
I
2N
and 50 °C
(122 °F) for
I
LD
.
Derating
I
2N
:
The load capacity decreases if the installation site ambient temperature exceeds
40 °C (104 °F) or if the altitude exceeds 1000 meters (3300 ft) or the switching
frequency is changed from 4 kHz to 8, 12 or 16 kHz.
I
LD
:
The load capacity decreases if the altitude exceeds 1000 meters (3300 ft) or the
switching frequency is changed from 4 kHz to 8, 12 or 16 kHz.
Temperature derating,
I
2N
In the temperature range +40 °C…+50 °C (+104 °F…+122 °F), the rated output
current (
I
2N
) is decreased by 1% for every additional 1 °C (1.8 °F). The output current
is calculated by multiplying the current given in the rating table by the derating factor.
Example:
If the ambient temperature is 50 °C (+122 °F), the derating factor is
100% - 1
· 10 °C = 90% or 0.90. The output current is then 0.90 ·
I
2N
.
Altitude derating,
I
2N
and
I
LD
(= all currents)
In altitudes 1000…2000 m (3300…6600 ft) above sea level, the derating is 1% for
every 100 m (330 ft).
%
°C
Aotewell Ltd
www.aotewell.com
Industry Automation
HongKong|UK|China
+86-755-8660-6182
