Technical data

Chapter 4 – Electrical Installation
Siemens Building Technologies, Inc. 11
Motor Cable Length
Maximum motor cable length is as follows:
• 328 ft (100 m) for shielded cables
• 164 ft (50 m) for unshielded cables
NOTES:
1. For SED2 drives with EMC filters, the maximum cable length is 82 ft (25 m). For cables shorter
than 82 ft (25 m), the EMC guideline for filtered devices does not apply.
2. If connecting multiple motors to one SED2, the total length of the individual motor cables must
not exceed the maximum motor cable length.
3. 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.
4. The following figure shows installation notes:
M
SED2
1. Use SBT-specified input
line reactor to ensure a good
impedance match with your drive.
3. Never run control or drive input
wires in the same conduit as
the drive output wires.
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 with the drive
output wires).
5. Inverter duty motors are recommended.
Install motors within their guidelines. Use
dV/dT filters, output reactors, or other load
conditions as applicable or as specified
by the motor manufacturer.
2. Keep the distance from the
drive to the motor as short
as possible to ensure long
motor life.