Owner manual

Chapter 4 –Functional Description
4-7
Note: In Wye-Delta motor applications, the trip threshold is ≥
25% of the FLA Setting
The ground fault protection feature of the SMP-3 overload
relay can only be used in three-phase applications. The ground
fault configuration DIP switch must be placed in the OFF
position for single-phase applications.
Jam/Stall Protection
Jam/Stall protection is enabled or disabled by placing the
Jam/Stall configuration DIP switch in the ON or OFF position,
respectively. When Jam/Stall protection is enabled, the SMP-3
overload relay will monitor the average current motor current
and trip on a Jam/Stall (F5) if the following conditions exist:
Average Current > 400% of the FLA Setting for
0.5 seconds continuously
Note: The Jam/Stall protection is inhibited until the SMP-3
overload relay has been operating with sufficient current
(≥ 30% of the FLC Setting) for at least one trip class duration.
SMP-3 MISCELLANEOUS FEATURES
Test
The SMP-3 overload relay provides a TEST DIP switch to al-
low a user to test the tripping ability of the SMP-3 overload
relay. When the TEST switch is placed in the ON position the
following events will occur:
 The SMP-3 overload relay will trip on a TEST fault
 The SMP-3 TRIP LED will flash a 1-flash fault code
 The Trip Relay across terminals 30 & 40 will open
When some of the additional features of the SMP-3 overload
relay are being utilized, the following events may also occur:
 OUT A and OUT B will turn OFF
 The HIM will display “TEST/TRIP” and fault code “F1”
 The Remote Reset LED will flash a 1-flash fault code
Once the tripping ability of the SMP-3 overload relay has been
verified, the TEST DIP switch must be placed in the OFF
position before the TEST fault can be reset.
Reset
The SMP-3 overload relay contains a blue RESET button that
can be used to manually reset SMP-3 faults. Refer to Chapter 9
for more information regarding when and how to clear faults.