Automationdirect.com Stellar SR44, User Manual

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2.10.5 – Overcurrent Trip Graph
‘Current Limit’, ‘Overload Level’ and ’Overload Delay’ settings may be adjusted to limit overload
currents in accordance with the trip curves shown in the Overload Trip Graph.
For motors with Full Load Currents lower than the rated current of the SR44, the Overload Level
can be adjusted using the following formula:
Overload Level = Motor FLC x 1.1 (A)
Fault current ( Motor Current x N )
1 2 3 4 5 6 7 8 9 10
Overload start point
(adjustable by P34 (or P93)
‡
; default setting: 110%)
1000
100
10
1
0.1
0.01
P35 (or P94)
‡
‡
Parameter selected through either the primary or secondary
group of value parameters
Delay = 80
Delay = 30
Delay = 10
Default
Delay = 140
Seconds
to trip
The Overload monitors only one of the phases, and the ’Current Limit’ level is only active during motor
starting.
We recommend that the control power supply be maintained between starts to ensure the integrity of the
Overload, which will reset on removal of control power.
Chapter 2: Electrical Installation
SR44 Series Soft Starter User Manual
1st Ed, Rev B 07/31/2019