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Powerdrive F300 User Guide 81
Issue Number: 2
Figure 4-19 Location of the 24 Vdc power supply connection on size 8 to 11
4.6 Heatsink fan supply
The heatsink fan on all drive sizes is supplied internally by the drive.
4.7 Ratings
The input current is affected by the supply voltage and impedance.
Typical input current
The values of typical input current are given to aid calculations for power flow and power loss.
The values of typical input current are stated for a balanced supply.
Maximum continuous input current
The values of maximum continuous input current are given to aid the selection of cables and fuses. These values are stated for the worst case
condition with the unusual combination of stiff supply with bad balance. The value stated for the maximum continuous input current would only be
seen in one of the input phases. The current in the other two phases would be significantly lower.
The values of maximum input current are stated for a supply with a 2 % negative phase-sequence imbalance and rated at the supply fault current
given in Table 4-6.
Table 4-6 Supply fault current used to calculate maximum input currents
Model Symmetrical fault level (kA)
All 100
Fuses
The AC supply to the drive must be installed with suitable protection against overload and short-circuits. Table 4-7 shows recommended
fuse ratings. Failure to observe this requirement will cause risk of fire.
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