Danfoss VLT AutomationDrive FC 300 Series - Safety Earth Connection; Spark Free Installation; EMC-Correct Installation; Electrical Installation - EMC Precautions

7.7.3 Safety Earth Connection
Thefrequency converter has a high leakage current and
must be earthed appropriately for safety reasons according
to EN 50178.
WARNING
The earth leakage current from the frequency converter
exceeds 3.5 mA. To ensure a good mechanical connection
from the earth cable to the earth connection (terminal 95),
the cable cross-section must be at least 10 mm
2
or 2 rated
earth wires terminated separately.
7.7.4 Spark Free Installation
Units with ingress protection rating IP55 (NEMA 12) or
higher prevent spark formation and are classified as limited
explosion risk electrical apparatus in accordance with the
European Agreement concerning International Carriage of
Dangerous Goods by Inland Waterways (ADN )
For units with ingress protection rating IP20, IP21 or IP54,
prevent risk of spark formation as follows:
•
Do not install a mains switch
•
Ensure that 14-50 RFI Filter is set to [1] On.
•
Remove all relay plugs marked “RELAY”. See
Illustration 7.61.
•
Check if relay options are installed. No other relay
options than MCB 113 are allowed (remove relay
plugs as above).
130BC301.11
1
2
3
4
5
6
7
8
9
10
11
Illustration 7.61 Location of Relay Plugs
Manufacturers declaration is available upon request
7.8
EMC-correct Installation
7.8.1 Electrical Installation - EMC
Precautions
The following is a guideline to good engineering practice
when installing frequency converters. Follow these
guidelines to comply with EN 61800-3 First environment. If
the installation is in EN 61800-3 Second environment, i.e.
industrial networks, or in an installation with its own
transformer, deviation from these guidelines is allowed but
not recommended. See also paragraphs CE Labelling,
General Aspects of EMC Emission and EMC Test Results.
Good engineering practice to ensure EMC-correct
electrical installation:
•
Use only braided screened/armoured motor
cables and braided screened/armoured control
cables. The screen should provide a minimum
coverage of 80%. The screen material must be
metal, not limited to but typically copper,
Electrical Installation
VLT
®
AutomationDrive FC 300 Design Guide, 0.25-75 kW
144 MG33BE02 - VLT
®
is a registered Danfoss trademark
77
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