Unidrive M600 Getting Started Guide 27
Issue Number: 2
Safety information Product information
Mechanical
installation
Electrical
installation
Getting started Basic parameters Running the motor
NV Media Card
Operation
Further information
4.1 Supply types
All drives are suitable for use on any supply type i.e TN-S, TN-C-S, TT and IT.
Supplies with voltage up to 600 V may have grounding at any potential, i.e. neutral, centre or corner
(“grounded delta”)
Supplies with voltage above 600 V may not have corner grounding
Drives are suitable for use on supplies of installation category III and lower, according to IEC 60664-1.
This means they may be connected permanently to the supply at its origin in a building, but for outdoor
installation additional over-voltage suppression (transient voltage surge suppression) must be
provided to reduce category IV to category III.
4.2 Ratings
See section 2.3 Ratings on page 9.
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
high imbalance. 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 maximum supply fault current given in section 2.3 Ratings on page 9.
The nominal cable sizes given in section 2.3 Ratings on page 9 are only a guide. Refer to local wiring
regulations for the correct size of cables. In some cases a larger cable is required to avoid excessive
voltage drop.
A fuse or other protection must be included in all live connections to the AC supply.
An MCB (miniature circuit breaker) or MCCB (moulded-case circuit-breaker) with type C may be
used in place of fuses for size 3 under the following conditions:
• The fault-clearing capacity must be sufficient for the installation
Fuse types
The fuse voltage rating must be suitable for the drive supply voltage.
If the drive is to be used on an IT (ungrounded) supply, refer to the Drive User Guide for
more information.
The nominal output cable sizes in section 2.3 Ratings on page 9 assume that the motor
maximum current matches that of the drive. Where a motor of reduced rating is used the
cable rating may be chosen to match that of the motor. To ensure that the motor and cable
are protected against over-load, the drive must be programmed with the correct motor
rated current.
Fuses
The AC supply to the drive must be installed with suitable protection against overload and
short-circuits. Nominal fuse ratings are shown in section 2.3 Ratings on page 9. Failure to
observe this requirement will cause risk of fire.
Unidrive M600 Getting Started Guide English Iss1.book Page 27 Friday, April 25, 2014 2:08 PM
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