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Operating Guide | VACON® NX Inverters FI4-FI8
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The cables must be PVC-isolated.
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The maximum ambient temperature is +86 °F.
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The maximum temperature of the cable surface is +158 °F.
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Use only cables with a concentric copper shield.
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The maximum number of parallel cables is 9.
When using parallel cables, make sure to obey the requirements of the cross-sectional area and the maximum number of cables.
For important information on the requirements of the grounding conductor, see the NEC and CEC.
For the correction factors for each temperature, see the instructions of NEC and CEC.
6.1.5 Fuse Selection
Find the recommended fuses in tables in
Information about the fuses:
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aR fuses protect the cables of the device against short circuits.
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gR fuses are designed to protect the device against both overcurrent and short circuits.
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gG fuses are used to protect cables against overcurrent and short circuits.
6.2 Grounding
Ground the AC drive in accordance with applicable standards and directives.
DAMAGE TO THE AC DRIVE FROM INSUFFICIENT GROUNDING
Not using a grounding conductor can damage the drive.
Make sure that the AC drive is always with a grounding conductor that is connected to the grounding terminal that is
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identified with the PE symbol.
LEAKAGE CURRENT HAZARD
Leakage currents exceed 3.5 mA. Failure to ground the drive properly can result in death or serious injury.
Ensure the correct grounding of the equipment by a certified electrical installer.
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The standard EN 61800-5-1 tells that 1 or more of these conditions for the protective circuit must be true.
The connection must be fixed.
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The protective earthing conductor must have a cross-sectional area of minimum 10 mm
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There must be an automatic disconnection of the mains, if the protective earthing conductor breaks. OR
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There must be a terminal for a second protective earthing conductor in the same cross-sectional area as the first protective
earthing conductor.
38 | Danfoss A/S © 2019.07
12.3 Cable and Fuse
Sizes.
C A U T I O N
W A R N I N G
Electrical Installation
2
2
Cu or 16 mm
Al. OR
AQ299433367205en-000101 / DPD00908
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