N3 Drive Operations Manual
Inverter Wiring; Input Power Wiring
13
8.6 Input Power Wiring and Installation Recommendations with Examples
Fig. 8.6 shows input power installation recommendations with correct and incorrect examples.
When possible the inverter should be connected to a dedicated input power source. (Fig. 8.6 a)
When the inverter is sharing a power source with other equipment, either install a special input noise filter,
(Fig. 8.6b) or an isolation transformer, (Fig. 8.6c) to isolate other loads.
Using a general purpose noise filter may not give sufficient results as shown in (Fig. 8.6d) below.
N3
IM
MCCB
Power
Source
N3
IM
MCCB
Power
Source
General
Noise
Filter
Machine
N3
IM
MCCB
Power
Source
Machine
General
Noise
Filter
N3
IM
MCCB
Power
Source
Special
Noise
Filter
Machine
N3
MCCB
Power
Source
Machine
IM
Isolation
Transformer
a) Dedicated Power Source
b) Special Noise Filter
c) Isolation Transformer
d) General Noise Filter
CORRECT
INCORRECT
or
Fig. 8.6 Input Power Wiring and Installation Examples