Installation
10 S801+ Soft Starter MN03900002E—November 2012 www.eaton.com
Power Wiring
Using the wiring diagrams in below as guides, connect the
Line and Motor wiring in accordance with appropriate local
and national codes.
Note: To provide optimum motor protection the Line and
Motor power wiring should be tightly bundled and run
perpendicular to the orientation of the S801+.
WARNING
Hazardous voltage can cause electric shock and burns. To
avoid shock hazard, disconnect all power to the
controller, motor or other control devices before any
work is performed on this equipment. Failure to do so
will result in personal injury, death or substantial
property damage.
Do not apply a disconnect device on the output of the
S801+ Soft Starter unless a means to turn off the soft
starter when disconnect switch is open is utilized.
Opening a disconnect while the Soft Starter is operating
may cause a malfunction. Closing a disconnect switch
while the Soft Starter is operating will result in a soft
starter failure and potential equipment damage and
personnel hazard.
Note: Short circuit protection must be applied on the line
side of the soft starter.
The S801+ is wired in an inline configuration.
By factory default, the S801+ is to be connected with an
ABC phase rotation on the incoming power wiring. If the
motor turns in the incorrect direction upon energization,
exchange two phases at the motor terminal box or at the
output terminals of the soft starter. Changing the input wiring
may cause a voltage phase reversal trip.
IMPORTANT
A reversing contactor must never be switched while the soft
starter is operating. In order to gain the full benefit of the
S801+ with a reversing contactor, the S801+ needs to be
OFF when switching the direction of the motor. The soft
starter control settings must account for catching a motor
spinning in the opposite direction upon soft restarts. The
time required for slowing the motor to a stop and then
ramping up to speed in the opposite direction adds to the
overall starting time. This condition will also impact the
overload protection setting.
See the Motor/Application Considerations in Appendix D for
information on typical motor winding configurations.
Inline Connected Soft Starter Power Wiring
Diagram S801+…N3S
Line and Load Power Wiring
S801+N… and S801+R… soft starters utilize box lugs to
accomplish line and load power wiring. Refer to the table
below for wire sizing requirements.
Line and Load Power Wiring, S801+N… and S801+R…
Note
1
Wire sizes Cu 75°C only.
Catalog
Number
Conductor
Size
1
Number of
Conductors
Torque
Lb-in (Nm)
S801+N… 2 AWG 1 50 (5.6)
4–6 AWG 45 (5.0)
8 AWG 40 (4.5)
10–14 AWG 35 (4.0)
S801+R… 14–8 AWG 1 90–100 (10.1–11.3)
6–4 AWG
3–3/0 AWG
6–4 AWG
3–3/0 AWG
M
3~
2 T1 4 T2 6 T3
1 L1 3 L2 5 L3
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