Rockwell Automation 193 193-5.0: Bulletin 913/592 SMP-3 Solid-State Overload Relay User Manual
Page 44
Chapter 3 – Installation and Wiring
3-34
Selecting Ground Fault (GF), Jam/Stall, and Test Functionality
DIP Switch Setting
•
ON
Ground Fault (GF) – The ground fault feature of the SMP-3 overload relay is enabled by placing the
GF DIP switch in the “ON” position. When the ground fault is enabled, the SMP-3 overload relay will
trip if an equipment ground fault of
w 50% of the full load current setting exists for 0.5 second, after
the SMP-3 overload relay has been operating with
w 30% of the full load current setting for at least
one trip class time period.
Note 1: The ground fault protection can only be used in three-phase applications. For single phase
applications the ground fault DIP switch must be in the OFF position.
Note 2: With wye-delta motor applications, the trip threshold is equal or greater than 25% of the of the
Full Load Current setting.)
•
OFF
Jam/Stall – The Jam/Stall feature of the SMP-3 overload relay is enabled by placing the Jam/Stall DIP
switch in the “ON” position. When the jam/stall switch is enabled, the SMP-3 overload relay will trip
if
u400% of the full load current setting exists for 0.5 seconds, after the SMP-3 overload relay has
been operating with
≥
30% of the full load current setting for more than one trip class period of time.
TEST – The trip functionality of the SMP-3 overload relay can be tested by placing the test DIP
switch in the “ON” postion. When the test DIP switch is moved to the “OFF” position, the SMP-3
overload relay will remain in the “Test Fault“ condition until manually reset.