User guide

10 Unidrive M700 Getting Started Guide
Issue Number: 5
Table 2-5 Protective ground cable ratings
Typical short term overload limits
The maximum percentage overload limit changes depending on the selected motor. Variations in
motor rated current, motor power factor and motor leakage inductance all result in changes in the
maximum possible overload. Typical values are shown in the table below:
Table 2-6 Typical overload limits
Generally the drive rated current is higher than the matching motor rated current allowing a higher
level of overload than the default setting.
The time allowed in the overload region is proportionally reduced at very low output frequency on
some drive ratings.
Output current
The continuous output current ratings given on the rating label are for maximum 40 °C (104 °F),
1000 m altitude and 2.0 kHz switching. Derating is required for higher switching frequencies, ambient
temperatures >40 °C (104 °F) and higher altitude. For derating information, refer to the Unidrive
M700 / M701 User Guide.
Input current
The input current is affected by the supply voltage and impedance. The input current given on the
rating label is the typical input current and is stated for a balanced supply.
Model Ground conductor size
200 V
03200050, 03200066, 03200080, 03200106,
04200137, 04200185, 06200330
Either use 10 mm
2
cable or 2 cables of the same cross
sectional area as the recommended phase cables
06200440
Either use 16 mm
2
cable or 2 cables of the same cross
sectional area as the recommended phase cables
400 V
03400025, 03400031, 03400045, 03400062,
03400078, 03400100, 04400150, 04400172,
06400420
Either use 10 mm2 cable or
2 cables of the same cross
sectional area as the recommended phase cables
06400470
Either use 16 mm
2
cable or 2 cables of the same cross
sectional area as the recommended phase cables
575 V
06500100, 06500150, 06500190, 06500230,
06500290, 06500350
Either use 10 mm2 cable or
2 cables of the same cross
sectional area as the recommended phase cables
Operating mode
RFC from
cold
RFC from
100 %
Open loop
from cold
Open loop
from 100 %
Normal Duty overload with motor rated current
= drive rated current
110 % for 165 s 110 % for 9 s 110 % for 165 s 110 % for 9 s
Heavy Duty overload with motor rated current
= drive rated current
200 % for 28 s 200 % for 3 s 150 % for 60 s 150 % for 8 s
The maximum overload level which can be attained is independent of the speed.
NOTE