© 2016 Littelfuse Protection Relays & Controls
Protection Relays
Current Monitoring Relays and Transducers
www.littelfuse.com/lsru
Rev: 1-A-062716
LSRU SERIES
Specifications
Functional Characteristics
Isolation 600VAC rms
Power 2 Watts
Motor Acceleration Time 2 seconds
When not selected as
an option:
Fixed Trip Delay 0.5 second
(-AL, -FC) 1 second
Fixed Restart Delay 1 second
(-AL only) as soon as current is within limits
(-FC only) 0.5 second
Input Characteristics
Control Power 24VAC or 115VAC
Output Characteristics
Output Contact Rating (SPDT)
Pilot Duty 480VA @ 240VAC
General Purpose 10A @ 240VAC
General Characteristics
Temperature Range -40° to 70°C (-40° to 158°F)
Wire Size #12-24AWG
Hole Size 0.725” diameter
Terminal Torque 7 in.-lbs.
Safety Marks
CSA, CSA-NRTL/C (File #46510)
CE
Dimensions H 42.42 mm (1.67”); W 58.42 mm (2.3”);
D 90.43 mm (3.56”)
Weight 0.5 lb. (8 oz., 226.8 g)
Mounting Method Four #6 screws 3/4” in length
Caution: This product should not be relied upon solely for safety of life or safety applications.
Ordering Information
MODEL LINE VOTAGE CURRENT RANGE DESCRIPTION
LSRU-024-AL-2 24VAC 5-25A Alarm logic
LSRU-024-AL-3 24VAC 25-100A Alarm logic
LSRU-115-AL-1.5 115VAC 0-10A Alarm logic
LSRU-115-AL-2 115VAC 5-25A Alarm logic
LSRU-115-AL-3 115VAC 25-100A Alarm logic
LSRU-115-FC-1.5 115VAC 0-10A Feed control logic
LSRU-115-OT-1.5 115VAC 0-10A Motor control logic with overcurrent trip, adj trip delay (0.5-60s)
LSRU-115-OT-2 115VAC 5-25A Motor control logic with overcurrent trip, adj trip delay (0.5-60s)
LSRU-115-OT-3 115VAC 25-100A Motor control logic with overcurrent trip, adj trip delay (0.5-60s)
LSRU-115-OR-1.5 115VAC 0-10A Motor control logic with overcurrent trip, adj restart delay (0.5-300s, manual)
LSRU-115-OR-2 115VAC 5-25A Motor control logic with overcurrent trip, adj restart delay (0.5-300s, manual)
LSRU-115-UE-2 115VAC 5-25A Motor control logic with undercurrent trip, adj ext restart delay (2-300m, manual)
LSRU-115-UT-2 115VAC 5-25A Motor control logic with undercurrent trip, adj trip delay (0.5-60s)
LSRU-115-UT-3 115VAC 25-100A Motor control logic with undercurrent trip, adj trip delay (0.5-60s)
LSRU-115-UR-2 115VAC 5-25A Motor control logic with undercurrent trip, adj restart delay (0.5-300s, manual)
LSRU-115-OU-1.5 115VAC 0-10A Motor control logic with overcurrent and undercurrent trip
LSRU-115-OU-2 115VAC 5-25A Motor control logic with overcurrent and undercurrent trip
LSRU-115-OU-3 115VAC 25-100A Motor control logic with overcurrent and undercurrent trip
PART # KEY
O = Overcurrent Trip
U = Undercurrent Trip
T = Adj. Trip Delay (0.5-60 seconds)
R = Adj. Restart Delay (0.5-300 seconds, Manual)
E = Adj. Extended Restart Delay (2-300 minutes, Manual)
1.5 = 0-10 Amps
2 = 5-25 Amps
3 = 25-100 Amps