To comply with European Union directives and United Kingdom regulations related
to standard EN 60204-1, the disconnecting device must be one of these types:
• switch-disconnector of utilization category AC-23B (IEC 60947-3)
• disconnector that has an auxiliary contact that in all cases causes switching
devices to break the load circuit before the opening of the main contacts of
the disconnector (EN 60947-3)
• circuit-breaker suitable for isolation in accordance with IEC 60947-2.
Selecting the main contactor
You can equip the drive with a main contactor.
Follow these guidelines when you select a customer-defined main contactor:
• Dimension the contactor according to the nominal voltage and current of the
drive. Also consider the environmental conditions such as surrounding air
temperature.
• IEC installations: Select contactor with utilization category AC-1 (number of
operations under load) according to IEC 60947-4.
• Consider the application life time requirements.
Checking the compatibility of the motor and drive
Use an asynchronous induction motor, a permanent magnet motor or a ferrite
assisted synchronous reluctance motor. Multiple induction motors can be
connected to the drive at a time when using the scalar motor control mode.
Make sure that the motor(s) and the drive are compatible according to the rating
table in the technical data.
Selecting the power cables
￭
General guidelines
Select the input power and motor cables according to local regulations.
• Current: Select a cable capable of carrying the maximum load current and
suitable for the prospective short-circuit current provided by the supply
network. The method of installation and ambient temperature affect the cable
current carrying capacity. Obey local regulations and laws.
• Temperature: For an IEC installation, select a cable rated for at least 70 °C
(158 °F) maximum permissible temperature of conductor in continuous use.
For North America, select a cable rated for at least 75 °C (167 °F).
• Voltage: 600 V AC cable is accepted for up to 500 V AC. 750 V AC cable is
accepted for up to 600 V AC. 1000 V AC cable is accepted for up to 690 V AC.
44 Guidelines for planning the electrical installation
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