1.3.5 Electrical Installation in General
All cabling must comply with national and local regulations on cable cross-sections and ambient temperature. Copper
conductors required, (75 °C) recommended.
Enclosure Torque [Nm]
Frame IP class Line Compressor
connection
DC connection Control
terminals
Ground Relay
H3 IP20 1.4 0.8 0.8 0.5 0.8 0.5
H4 IP20 1.2 1.2 1.2 0.5 0.8 0.5
H5 IP20 1.2 1.2 1.2 0.5 0.8 0.5
Table 1.7 Enclosure H3-H5
1.3.6
Connecting to Mains and Compressor
The frequency converter is designed to operate Danfoss
VZH Compressors. For maximum cross-section on wires see
chapter 1.7 General Specifications.
•
Use a shielded/armored compressor cable to
comply with EMC emission specifications, and
connect this cable to both the decoupling plate
and the compressor metal.
•
Keep compressor cable as short as possible to
reduce the noise level and leakage currents.
•
For further details on mounting of the
decoupling plate, see VLT
®
Compressor Drive CDS
803 Decoupling Plate Installation Instructions.
•
Also see EMC-Correct Installation in the VLT
®
Compressor Drive CDS 803 Design Guide.
1. Mount the ground wires to ground terminal.
2. Connect compressor to terminals U, V and W, see
Table 1.8.
U
T1
V T2
W T3
Table 1.8 Connection of Compressor to Terminals
3. Mount mains supply to terminals L1, L2 and L3
and tighten.
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