Motor Cable Length - Siemens SED2 VFD NEMA Operating Instructions Manual

SED2 VFD NEMA Type 3R/3RHE Bypass Operating Instructions

Motor Cable Length

Motor cable length is given to ensure performance of only the drive, not the suitability of the
motor when connected to a drive at this distance.
•
Maximum motor cable length is 164 ft (50 m).
•
See Figure 11 for installation notes.
!
1. Never run control or drive input
2. Keep the distance from the drive
to the motor as short as possible
3. If needed, use
SBT-specified input line reactors
to ensure a good impedance match
with your drive.
18
wires in the same conduit as
the drive output wires.
to maximize motor life.
Figure 14. Motor Cable Installation Notes.
4. If a disconnect is mounted on the
load side of your drive, it is desirable
to wire an auxiliary contact to the drive
that will disable drive operation when
the disconnect opens. (The wiring for
this contact must not be run in the same
conduit as the drive output wires).
SED2
M
5. Inverter duty motors are recommended.
Install motors within their guidelines. Use
dV/dT filters, output reactors, or other load
conditioners as applicable or as specified
by the motor manufacturer. Reactor products
must be mounted next to the drive.
Siemens Building Technologies, Inc.