User guide

Unidrive SP Short Form Guide 27
Issue Number: 2 www.controltechniques.com
Safety
Information
Product
Information
Mechanical
Installation
Electrical
Installation
Getting Started Basic parameters
Running the
motor
SMARTCARD
Advanced
parameters
Diagnostics
UL Listing
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 600V may have grounding at any potential, i.e. neutral,
centre or corner (“grounded delta”)
Supplies with voltage above 600V may not have corner grounding
Drives are suitable for use on supplies of installation category III and lower, according to
IEC60664-1. 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 2.1 Ratings on page 8.
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
2.1 Ratings on page 8.
The recommended cable sizes in section 2.1 Ratings on page 8 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 1 to 3 under the following conditions:
• The fault-clearing capacity must be sufficient for the installation
• For frame sizes 2 and 3, the drive must be mounted in an enclosure which meets
the requirements for a fire enclosure
See Chapter 11 UL Listing Information on page 119 for UL listing requirements.
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 Unidrive SP User
Guide for more information.
NOTE
The recommended output cable sizes in section 2.1 Ratings on page 8 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.
NOTE
UL listing is dependent on the use of the correct type of UL-listed fuse, and applies when
symmetrical short-circuit current does not exceed 5kA for sizes 1 to 3.
NOTE
Fuses
The AC supply to the drive must be installed with suitable protection against overload
and short-circuits. section 2.1 Ratings on page 8 shows recommended fuse ratings.
Failure to observe this requirement will cause risk of fire.
WARNING