Emc-Correct Electrical Installation; Diagram - Danfoss VLT Decentral FCD 300 Operating Instructions Manual

VLT® Decentral FCD

2.3.9 EMC-Correct Electrical Installation

General points to be observed to ensure EMC-correct electrical installation.
- Use only screened/armoured motor cables and screened/armoured control cables.
- Connect the screen to earth at both ends.
- Avoid installation with twisted screen ends (pigtails), since this ruins the screening effect at high frequencies. Use cable clamps instead.
- Don't remove the cable screen between the cable clamp and the terminal.
2.3.10 ATEX correct installation
The following issues must be taken into account when installing the FCD
300 in ATEX zone 22 environments:
• Motor must be designed, tested and certified by the motor man-
ufacturer for variable speed application
• Motor must be designed for Zone 22 operation. I.e. with type of
protection "tD" acc. to EN61241-0 and -1 or EN50281-1-1.
• Motor must be provided with thermistor protection. The ther-
mistor protection must either be connected to an external ther-
mistor relay, with EC Type Examination Certificate or compatible
with the FCD 300 thermistor input.
If the FCD 300 thermistor protection is used, the thermistor
must be wired to terminals 31a and 31b, and thermistor trip
activated by programming parameter 128 to thermistor trip [2].
See parameter 128 for further details.

2.4 Diagram

* Integrated brake and mechanical brake control and external 24 V are options.
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For a declaration of conformity, please consult your local Danfoss repre-
sentative.
MG.04.B8.02 - VLT is a registered Danfoss trademark
Cable entries must be chosen for the enclosure protection to be
maintained. It must also be ensured that the cable entries com-
ply with the requirements for clamping force and mechanical
strengths as described in EN 50014:2000.
The FCD must be installed with appropriate earth connecting
according to local/national regulations.
The installation, inspection and maintenance of electrical appa-
ratus for use in combustible dusts, must only be carried out by
personnel that is trained and familiar with the concept of pro-
tection.
2 Installation
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