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Safety
Product
Mechanical
information
information
installation
1.8
Motor
Ensure the motor is installed in accordance with the manufacturer's recommendations. Ensure the motor shaft is not exposed.
Standard squirrel cage induction motors are designed for single speed operation. If it is intended to use the capability of the drive to run a motor at
speeds above its designed maximum, it is strongly recommended that the manufacturer is consulted first.
Low speeds may cause the motor to overheat because the cooling fan becomes less effective. The motor should be installed with a protection
thermistor. If necessary, an electric forced vent fan should be used.
The values of the motor parameters set in the drive affect the protection of the motor. The default values in the drive should not be relied upon.
It is essential that the correct value is entered into the Motor Rated Current (B02). This affects the thermal protection of the motor.
1.9
Mechanical brake control
The brake control functions are provided to allow well coordinated operation of an external brake with the drive. While both hardware and software
are designed to high standards of quality and robustness, they are not intended for use as safety functions, i.e. where a fault or failure would result in
a risk of injury. In any application where the incorrect operation of the brake release mechanism could result in injury, independent protection devices
of proven integrity must also be incorporated.
1.10
Adjusting parameters
Some parameters have a profound effect on the operation of the drive. They must not be altered without careful consideration of the impact on the
controlled system. Measures must be taken to prevent unwanted changes due to error or tampering.
1.11
Electrical installation
1.11.1
Electric shock risk
The voltages present in the following locations can cause severe electric shock and may be lethal:
•
AC supply cables and connections
•
Output cables and connections
•
Many internal parts of the drive, and external option units
•
Unless otherwise indicated, control terminals are single insulated and must not be touched.
1.11.2
Stored charge
The drive contains capacitors that remain charged to a potentially lethal voltage after the AC supply has been disconnected. If the drive has been
energized, the AC supply must be isolated at least ten minutes before work may continue.
E300 Design Guide
Issue Number: 1
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