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Instructional Leaet IL03902001E
Effective February 2011
S811 quick installation guide
EATON CORPORATION www.eaton.com
FLA setting calculation
The FLA setting is a function of the product of the motor nameplate
full load amperes (FLA) and a multiplier from the service factor
multiplier (SF) in Table 2 below.
FLA setting = Motor FLA x SF multiplier
For example, an S811R13N3S with a 100A, 1.15 service factor motor
should have an FLA setting of 115 (100 x 1.15).
Please refer to sizing charts in product user manual, MN03902002E,
or call 877-ETN-CARE (386-2273) for assistance in sizing a soft
starter for specific applications.
Table 2. FLA Ranges
Frame
Size FLA Current
Range Catalog
Number
N (65 mm) 11–37 S811N37N3S
20–66 S811N66N3S
R (110 mm) 32–105 S811R10N3S
42–135 S811R13N3S
T (200 mm) 56–180 S811T18N3S, S811T18V3S
75–240 S811T24N3S, S811T24V3S
95–304 S811T30N3S, S811T30V3S
U (200 mm) 112–360 S811U36N3S
131–420 S811U42N3S
156–500 aS811U50N3S
V (290 mm) 112–360 S811V36N3S, S811V36V3S
131–420 S811N42N3S, S811V42V3S
156–500 S811N50N3S, S811V50V3S
203–650 S811N65N3S, S811V65V3S
225–720 S811N72N3S, S811V72V3S
265–850 S811N85N3S, S811V85V3S
310–1000 S811V10N3S
a 500A rating does not have IEC certification.
Wiring and control check list for operating
through the control terminal block
A jumper is installed between terminals P and 1 for two-wire
control (e.g., RUN/STOP toggle switch or PLC control)
24V power supply meets minimum requirements (55 watt
steady-state, 240 watt inrush for 180 ms, 30 Vdc maximum.)
Control power wire for the positive and negative terminals
is 14 AWG or larger
Control wire length less than 100 feet
24V is supplied to pin 3 on the control terminal block if controlling
through these terminals is desired
Power wiring check list
24 Vdc control voltage will be applied to terminal P
Phase sequence is correct (ABC); otherwise, soft starter will
trip on phase reversal
If output isolation contactor is used, it cannot open until the
soft starter stops to prevent a low current trip
After completing the above, apply line power, apply 24 Vdc control
voltage, and then initiate start signal to energize motor.
Check list—settings—special applications
You may improve performance if operating on generator power
by setting the kick start time to 2 seconds and kick start torque
to half the value of the initial torque setting. This creates a step
loading effect of the generator, allowing the governor to regulate
the power demand of starting larger motors.
Troubleshooting
For additional setting details, refer to the S811 User Manual
MN03902002E available at www.eaton.com/electrical.
For technical questions, please contact EatonCare at
877-ETN-CARE (386-2273).
