Document No. 129-371
Installation Instructions
April 20, 2007
Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and
models as design improvements are introduced. Other product or company names mentioned herein may be the trademarks of their
respective owners. © 2007 Siemens Building Technologies, Inc.
Siemens Building Technologies, Inc.
1000 Deerfield Parkway
Buffalo Grove, IL 60089-4513
U.S.A.
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Document No.129-405
Printed in the U.S.A.
Page 8 of 8
Motor Cable Length
Maximum motor cable length is 164 ft (50 m). Motor
cable length is given to ensure performance of only
the SED2, not the suitability of the motor when
connected to a SED2 at this distance. See Figure 8
for motor cable installation notes.
Motor Connection
The motor nameplate indicates the required supply
voltage and method of connection (delta, Δ, or
star/wye, ‘Y’, configuration). Connect motor wiring to
SED2 terminals U, V, and W. See Figure 9.
M
SED2
3. If needed, use
SBT-specified input line reactors
to ensure a good impedance match
with your drive.
1. 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 in the same
conduit as the drive output wires).
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.
2. Keep the distance from the drive
to the motor as short as possible
to maximize motor life.
VFD0014R2
!
Figure 8. Motor Cable Installation Notes.
MOTOR TERMINALS
U2 V2W2
U1 V1 W1
U2 V2W2
U1 V1 W1
VFD0029R2
Wye "Y"
Figure 9. SED2 Motor Connections.
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