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 at 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.
Figure 8. 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
oor 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.
EC-LTS1200-410
5. Installation
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Danfoss | Produced By: Danfoss Power Solutions | September 2020 | 27