2
2/08
6. Energize the load to be monitored. Verify normal running amps have been
achieved. The LED will be lit under normal operating conditions (the current
sensed is at an acceptable level) indicating the output contacts are energized
(NO is closed and NC is open). If the current drops to zero, the LSRU
will recognize a normal stop, and will not de-energize its relay.
NOTE: The standard LSRU is a fail-safe design, meaning the NO (normally
open contact) will be open if the LSRU fails or control power is
interrupted.
7. The installation is now complete.
LSRU
L3
L2
M
L1
L2
START
0L
STOP
OL
OL
L1
OL
MOTOR
M
MAGNE
TIC
CON
T
AC
T
OR
THREE
PHAS
E PO
WER
CONTRO
L
P
OWER
FIGURE 1: TYPICAL WIRING DIAGRAM
Unit Description
Model
#
Voltage
Range
Options
Current Range
LSRU
024 – 18 to 30 VAC
O – Overcurrent
1.5 – 0 to 10 Amps
115
–
90
to 135
VAC
U
–
Undercurrent
2 – 5 to 25 Amps
T – Trip Delay
3 – 25 to 100 Amps
R – Restart Delay (seconds)
E – Extended Restart Delay (minutes)
Any questions or comments call SymCom at 1-800-843-8848 or 1-605-348-5580.
SymCom warrants its microcontroller based products against defects in material or workmanship
for a period of five (5) years from the date of manufacture. All other products manufactured by
SymCom shall be warranted against defects in material and workmanship for a period of two (2)
years from the date of manufacture. For complete information on warranty, liability, terms, and
conditions, please refer to the SymCom Terms and Conditions of Sale document.
