Danfoss EC-LTS1200-410 User Manual page 24

User Guide
EC-LTS1200-410
Installation
24 | © Danfoss | July 2021
Main frame
The best grounding is achieved when the main frame of each electric device is directly connected to the
ground. If this is not possible, the electric device must be grounded at least from one of the safety
grounding points with an appropriate grounding cable. For good functional grounding use wide flat
grounding braid. Round grounding wires are adequate for safety grounding but it does not provide very
good functional grounding because of its higher impedance at high frequencies. The grounding points
are marked to the electric device.
There are two marked safety grounding points, however, any of the mounting points can be used for
grounding.
Grounding points
1. Grounding connection: M8 hole. Refer to Main dimension drawing if necessary.
Safety grounding points and protective earth conductor
Touch current in the protective earth conductor exceeds 3,5 mA AC and 10 mA DC.
The cross sectional area of the protective earth conductor must be at least equal to that of the
incoming supply conductor.
One of the safety grounding points must be connected to adjacent building steel (girder, joist), a floor
ground rod, or bus bar. Grounding points must comply with national and local industrial safety
regulations and/or electrical codes.
Cabling and wiring
To make sure that the electric device functions correctly and to minimize the radiated emissions, all
connected cables and wires must be EMC-shielded. Shieldings must be connected to the ground at both
ends of the cable or wire. All power connections must be secured with cable lugs and cable glands. EMC-
shielded cable glands are used in all Danfoss products for the power connections. Make sure that the low
voltage cable (control signal cable) shield is also grounded from the both ends.
BC355449988603en-000201