Rockwell Automation 193 193-5.0: Bulletin 913/592 SMP-3 Solid-State Overload Relay - Manual (Page 53)

Chapter 4 – Functional Description
4-5
Figure 4.4 SMP-3 Trip Curves – Class 30
Approximate trip time
for 3-phase balanced condi-
tion from cold start.
Approximate trip time
for 3-phase balanced condi-
tion from hot start.
Multiples of Full Load Current
Approximate T
rip
T
ime
(sec.)
1.0
10.0
100.0
1000.0
10000.0
1 10 2 3 9 8 7 6 5 4
The following figure illustrates the time-current characteristics
of the SMP-3 overload relay after the auto-reset time has
expired and the SMP-3 overload relay is reset.
Figure 4.5 SMP-3Trip Curve after Auto Restart
1000% 100%
0
1
10
100
1000
100000
Percent Full Load Current Setting
Seconds
Class 10
Class 15
Class 20
Class 30
Auto Reset Times:
Class 10 = 90s
Class 15 = 135s
Class 20 = 180s
Class 30 = 270s