Excessive dust particle levels are often found on installation cabinets and existing electrical installations. One indicator of aggressive airborne gases is
blackening of copper rails and cable ends on existing installations.
D and E enclosures have a stainless steel back-channel option to provide additional protection in aggressive environments. Proper ventilation is still
required for the internal components of the drive. Contact Danfoss for additional information.
2.5 Vibration and shock
The frequency converter has been tested according to the procedure based on the shown standards:
The frequency converter complies with requirements that exist for units mounted on the walls and floors of production premises, as well as in panels
bolted to walls or floors.
IEC/EN 60068-2-6:
Vibration (sinusoidal) - 1970
IEC/EN 60068-2-64:
Vibration, broad-band random
2.6 Safe Stop
2.6.1 Electrical terminals
The frequency converter can perform the safety function
Safe Torque Off
(As defined by draft CD IEC 61800-5-2) or
Stop Category 0
(as defined in EN
60204-1).
It is designed and approved suitable for the requirements of Safety Category 3 in EN 954-1. This functionality is called Safe Stop. Prior to integration and
use of Safe Stop in an installation, a thorough risk analysis on the installation must be carried out in order to determine whether the Safe Stop functionality
and safety category are appropriate and sufficient.
In order to install and use the Safe Stop function in accordance with the requirements of Safety Category 3 in EN 954-1, the related
information and instructions of the relevant Design Guide must be followed! The information and instructions of the Operating In-
structions are not sufficient for a correct and safe use of the Safe Stop functionality!
VLT
®
HVAC Drive Design Guide
2 Introduction to VLT HVAC Drive
MG.11.B9.02 - VLT
®
is a registered Danfoss trademark
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