Ac Supply Requirements; Cables And Fuses - Control Techniques Commander SE11200025 Guia Del Usuario

AC supply by plug and socket
Special attention must be given if the drive is installed in equipment which is
connected to the AC supply by a plug and socket. The AC supply terminals of the
WARNING
drive are connected to the internal capacitors through rectifier diodes which are
not intended to give safety isolation. If the plug terminals can be touched when
the plug is disconnected from the socket, a means of automatically isolating the
plug from the drive must be used (eg. a latching relay).
4.4.1

AC supply requirements

The following types of AC supply are suitable.
Single phase models:
• Single phase (i.e. between one phase and neutral of a star-connected three phase
supply)
• Between two phases of a three phase supply (any one phase can be grounded)
Three phase models:
• Three phase star or delta supply of the correct voltage (any one phase or neutral
can be grounded)
Dual rated 200V models:
• Any of the above
The input current differs for single phase and three phase supplies.
NOTE
Supply voltage and current information is given in Chapter 3 Technical Data .
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 overvoltage suppression (transient
voltage surge suppression) must be provided to reduce category IV to category III.
4.4.2

Cables and fuses

Recommended cable sizes are given in Chapter 3 Technical Data . They 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.
Use 105°C (221°F) (UL 60/75°C temp rise) pvc-insulated cable with copper conductors
having a suitable voltage rating, for the following power connections:
• AC supply to RFI filter (when used)
• AC supply (or RFI filter) to drive
• Drive to motor
• Drive to braking resistor
Fuses
The AC supply to the drive must be fitted with suitable protection against
overload and short-circuits. The tables in Chapter 3 Technical Data show
WARNING
recommended fuse ratings. Failure to observe this requirement will cause risk of
fire.
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
tripping characteristics and the same rating as the fuse(s), may be used in place of the
fuse(s), on condition that the fault current clearing capacity is sufficient for the
installation.
Fuse Types
Europe: Type gG fuses complying with EN60269 parts 1 and 2.
USA: Bussman Limitron KTK series, class CC fast acting fuses.
Commander SE User Guide
Issue Number 9 www.controltechniques.com
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