Installation of 24 Volt external DC Sup-
ply
Torque: 0.5 - 0.6 Nm (5 in-lbs)
Screw size: M3
No.
Function
35 (-), 36
(+)
24 V external DC supply
24 V external DC supply can be used as low-voltage supply to the control card and any option
cards installed. This enables full operation of the LCP (incl. parameter setting) without connection
to line power. Please note that a low voltage warning is issued when 24 V DC has been connected;
however, there will be no tripping.
Use a 24 V DC supply of type PELV to ensure correct galvanic isolation (type PELV)
on the control terminals of the adjustable frequency drive.
3.6.2. Power Connections
Cabling and Fusing
NOTE
Cables General
All cabling must comply with national and local regulations on cable cross-sections
and ambient temperature. Copper (167° F [75° C]) conductors are recommended.
The power cable connections are laid out as shown below. Dimensioning of cable cross-sections
must be done in accordance with the current ratings and local legislation. See the
Specifications
section
for details.
To protect the adjustable frequency drive, the recommended fuses must be used or the unit must
have built-in fuses. Recommended fuses are listed in the tables in the fuses section. Always ensure
that proper fusing is done according to local regulations.
The line connection is fitted to the line switch if this is included.
3. How to Install
VLT
®
HVAC DRIVE High Power
Instruction Manual
50
MG.11.F1.22 - VLT
®
is a registered Danfoss trademark.
3
