Technical data 393
Note: It is not allowed to install a drive with the internal EMC filter connected on IT
(ungrounded) systems. The supply network becomes connected to ground potential
through the EMC filter capacitors which may cause danger or damage the drive.
Note: It is not allowed to install a drive with the internal EMC filter connected on a
corner-grounded TN system as this would damage the drive.
UL marking
See the type designation label for the valid markings of your drive.
The UL mark is attached to the drive to verify that it meets UL requirements.
UL checklist
Input power connection – See section Electric power network specification on page
385.
Disconnecting device (disconnecting means) – See Selecting the supply
disconnecting device (disconnecting means) on page 40.
Ambient conditions – The drives are to be used in a heated indoor controlled
environment. See section Ambient conditions on page 389 for specific limits.
Input cable fuses – For installation in the United States, branch circuit protection
must be provided in accordance with the National Electrical Code (NEC) and any
applicable local codes. To fulfil this requirement, use the UL classified fuses given in
section Power cable sizes and fuses on page 377.
For installation in Canada, branch circuit protection must be provided in accordance
with Canadian Electrical Code and any applicable provincial codes. To fulfil this
requirement, use the UL classified fuses given in section Power cable sizes and
fuses on page 377.
Power cable selection – See section Selecting the power cables on page 41.
Power cable connections – For the connection diagram and tightening torques, see
section Connecting the power cables on page 51.
Overload protection – The drive provides overload protection in accordance with
the National Electrical Code (US).
Braking – The drive has an internal brake chopper. When applied with appropriately
sized brake resistors, the brake chopper will allow the drive to dissipate regenerative
energy (normally associated with quickly decelerating a motor). Brake resistor
selection is discussed in Appendix: Resistor braking on page 405.
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