Installation
S811+ Soft Starter MN03900001E—November 2012 11
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 S811+.
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
S811+ 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 S811+ may be wired in an inline, or inside-the-delta
configuration.
By factory default, the S811+ 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.
If the input phase sequence to the S811+ cannot be
changed, the incoming Phase Sequence parameter in the
Soft Start Config. Menu may be set to ACB. Setting ACB as
the incoming phase sequence causes the S811+ to
recognize the reverse direction of phase rotation. Phase
rotation selection and monitoring may be turned off by
setting the Phase Sequence Parameter in the Soft Start
Config Menu.
IMPORTANT
A reversing contactor must never be switched while the soft
starter is operating. In order to gain the full benefit of the
S811+ with a reversing contactor, the S811+ needs to be
OFF when switching the direction of the motor. The soft
starter 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 E for
information on typical motor winding configurations.
Inline Connected Soft Starter (default) Power Wiring
Diagram S811+…N3S, S811+…P3S, S811+…V3S
Inside-the-Delta Connected Soft Starter Power Wiring
Diagram S811+…N3S, S811+P3S
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