The power cable shields are grounded (earthed) through the cable glands to the connection box and
further to the electric machine enclosure. After the cable gland assembly and power cable installations,
and any time when needed, make sure that the grounding (earthing) connections are correct.
1. Connect one terminal of the measurement device to the cable shield of one power cable (in the
inverter end of the cable)
2. Connect the other terminal of the measurement device to the cable shield of an other power cable.
You can also use the machine enclosure grounding point for the measurement.
3. Measure the resistance between the two cable shields or between the cable shield and the enclosure
grounding point.
4. Change the measurement device terminal(s) to the shield of different power cable and repeat the
measurement until all cables have been measured.
Testing the low voltage (measurement signal) cable shield grounding (earthing)
The low voltage (measurement signal) cable shield connects to the ground through the connector
grounding/earthing pins. After cable installation, and any time when needed, make sure that the
grounding (earthing) connection is valid.
1. Connect one terminal of the measurement device to the low voltage cable shield (in the non-
machine end of the cable).
2. Connect the other terminal of the measurement device to the machine enclosure grounding point.
3. Measure the resistance between the cable shield and the enclosure grounding point.
Anti-condensation heater connections
Do not run the electric machine when an anti-condensation heater is in use.
Water condensing inside the electric machine enclosure can result in failure or corrosion of the electric
machine. This often happens in cooler temperatures or higher humidity areas typically in marine
environment, when the machine is not running.
The electric machine can be equipped with anti-condensation heater to avoid condensation issues. The
anti-condensation heater (+HEAT1) or heaters (+HEAT2) are factory assembled. The installed heater may
not be used when the electric machine mains are switched on or when the electric machine is running.
The installed anti-condensation heater must be supplied with 230 Vac power. The heater connector is
inside the connection box, in the lower part if it. The anti-condensation heater cable has an inlet (cable
gland) next to the low voltage signal connector. See Figure below.
User Guide
EM-PMI540-T2000
Installation
©
Danfoss | July 2021
BC265857530809en-000202 | 51
