Appendix B—Overload Protection
38 S801+ Soft Starter MN03900002E—November 2012 www.eaton.com
Appendix B—Overload Protection
Thermal Overload
The S801+ Soft Starter features an electronic motor overload
protection feature. This is intended to protect the motor and
power wiring against overheating caused by excessive
current for extended periods of time.
Note: Short circuit protection must be applied on the
line side of the soft starter.
Enter the motor full load current rating by adjusting the FLA
potentiometer on the face of the CIM. It is adjustable from
32–100% of the unit’s rated current.
Overload—Adjustment Range—Inline Connected
Motor FLA Potentiometer Values
Note: Mtr Nameplate FLA potentiometer is adjustable to
any point within its range.
The thermal overload is designed to protect the motor from
overheating caused by excessive current. If the motor is
overloaded, the current drawn rises and heats the motor. The
FLA sets the trip threshold and the trip class (5 to 30) is set
with the Ovrld Trip Class potentiometer.
If the device trips on a thermal overload, an internal timer is
started which inhibits a reset for three minutes. After this
timer expires, the device may be reset and the thermal fault
is cleared. At this point another internal timer is started, this
timer is 26 x 3 or 48 minutes. If another trip occurs before
this timer expires, the reset inhibit time is increased to
6 minutes.
Catalog
Number Min Max Default Notes
S801+N37… 11 37 11 Motor FLA potentiometer
must be set to motor
nameplate FLA to achieve
proper overload
protection
S801+N66… 20 66 20
S801+R10… 32 105 32
S801+R13… 42 135 42
S801+T18… 56 180 56
S801+T24… 75 240 75
S801+T30… 95 304 95
S801+U36… 112 360 112
S801+U42… 131 420 131
S801+U50… 156 500 156
S801+V36… 112 360 112
S801+V42… 131 420 131
S801+V50… 156 500 156
S801+V65… 203 650 203
S801+V72… 225 720 225
S801+V85… 265 850 265
S801+V10… 312 1000 312
Catalog
Number
Potentiometer Setting
I
FLA
ABCDDefault
S801N37… 11 19 27 37 11
S801N66… 20 35 50 66 20
S801R10… 32 56 80 105 32
S801R13… 42 73 104 135 42
S801T18… 56 97 138 180 56
S801T24… 75 130 185 240 75
S801T30… 95 164 233 304 95
S801U36… 112 194 276 360 112
S801U42… 131 227 323 420 131
S801U50… 156 270 384 500 156
S801V36… 112 194 276 360 112
S801V42… 131 227 323 420 131
S801V50… 156 270 384 500 156
S801V65… 203 352 501 650 203
S801V72… 225 390 555 720 225
S801V85… 265 460 655 850 265
S801V10… 320 547 773 1000 320
To Next Page
Loading...
