Environmental Limits; Compliance With Regulations; Motor; Adjusting Parameters - Control Techniques UD51 User Manual

relied upon to ensure safety of personnel. If a safety hazard could exist from
unexpected starting of the drive, an interlock that electrically isolates the drive
from the AC supply must be installed to prevent the motor being inadvertently
started.
To ensure mechanical safety, additional safety devices such as electro-
mechanical interlocks and overspeed protection devices may be required.
The drive must not be used in a safety critical application without additional
high integrity protection against hazards arising from a malfunction.
Under certain conditions, the drive can suddenly discontinue control of the
motor. If the load on the motor could cause the motor speed to be increased
(e.g. in hoists and cranes), a separate method of braking and stopping must
be used (e.g. a mechanical brake).
2.4

Environmental limits

Instructions in this User Guide regarding transport, storage, installation and
use of the drive must be complied with, including the specified environmental
limits. Drives must not be subjected to excessive physical force.
2.5

Compliance with regulations

The installer is responsible for complying with all relevant regulations, such as
national wiring regulations, accident prevention regulations and
electromagnetic compatibility (EMC) regulations. Particular attention must be
given to the cross-sectional areas of conductors, the selection of fuses or
other protection, and protective earth (ground) connections.
This User Guide contains instruction for achieving compliance with specific
EMC standards.
Within the European Union, all machinery in which this product is used must
comply with the following directives:
98/37/EC: Safety of machinery.
89/336/EEC: Electromagnetic Compatibility.
2.6

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 fitted with a protection
thermistor. If necessary, an electric forced vent fan should be used.
2.7

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.
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UD51 User Guide
Issue Number: 5