Danfoss VLT FC 101 - IT Mains; Connecting to Mains and Motor

3.2.2 IT Mains
CAUTION
IT Mains
Installation on isolated mains source, that is, IT mains.
Ensure that the supply voltage does not exceed 440 V
(3x380–480 V units) when connected to mains.
On IP20, 200–240 V, 0.25–11 kW (0.33–15 hp) and 380–480
V, IP20, 0.37–22 kW (0.5–30 hp) units, open the RFI switch
by removing the screw on the side of the frequency
converter when at IT grid.
130BB612.10
1
1 EMC screw
Illustration 3.1 IP20, 200–240 V, 0.25–11 kW (0.33–15 hp), IP20,
0.37–22 kW (0.5–30 hp), 380–480 V
On 400 V, 30–90 kW (40–125 hp) and 600 V units, set
parameter 14-50 RFI Filter to [0] O when operating in IT
mains.
For IP54, 400 V, 0.75–18.5 kW (1–25 hp) units, the EMC
screw is inside the frequency converter, as shown in
Illustration 3.2.
130BC251.10
1 EMC screw
Illustration 3.2 IP54, 400 V, 0.75–18.5 kW (1–25 hp)
NOTICE
If reinserted, use only M3x12 screw.
3.2.3 Connecting to Mains and Motor
The frequency converter is designed to operate all
standard 3-phase asynchronous motors. For maximum
cross-section on cables, see chapter 6.3 General Technical
Data.
•
Use a shielded/armored motor cable to comply
with EMC emission specications and connect
this cable to both the decoupling plate and the
motor.
•
Keep the motor cable as short as possible to
reduce the noise level and leakage currents.
Installation
VLT
®
HVAC Basic Drive FC 101
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