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
A
B
C
D
Default
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
Содержание S801+ Series
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