Power Connections - Danfoss VLT HVAC Drive FC 102 Design Manual

How to Install
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1 Place conduits in shaded areas
Illustration 5.50 Frame Size F13

5.2.7 Power Connections

NOTICE
All cabling must comply with national and local
regulations on cable cross-sections and ambient
temperature. UL applications require 75 °C copper
conductors. Non-UL applications can use 75 °C and 90 °C
copper conductors.
The power cable connections are situated as shown in
Illustration 5.51. Dimensioning of cable cross section must
comply with the current ratings and local legislation. See
chapter 8.1 General Specifications for correct dimensioning
of motor cable cross-section and length.
For protection of the frequency converter, use the
recommended fuses unless the unit has built-in fuses.
Recommended fuses are listed in the Operating
Instructions. Ensure that proper fusing complies with local
regulations.
The mains connection is fitted to the mains switch if
included.
MG16C202
Design Guide
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Danfoss A/S © Rev. 05/2014 All rights reserved.
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3 Phase
power
input
Illustration 5.51 Power Cable Connections
NOTICE
The motor cable must be screened/armoured. If an
unscreened/unarmoured cable is used, some EMC
requirements are not complied with. Use a screened/
armoured motor cable to comply with EMC emission
specifications. For more information, see
chapter 5.7 EMC-correct Installation.
Screening of cables
Avoid installation with twisted screen ends (pigtails). They
spoil the screening effect at higher frequencies. If it is
necessary to break the screen to install a motor isolator or
contactor, continue the screen at the lowest possible HF
impedance.
Connect the motor cable screen to both the de-coupling
plate of the frequency converter and the metal housing of
the motor.
Make the screen connections with the largest possible
surface area (cable clamp) by using the installation devices
within the frequency converter.
1
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95 PE
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5 5