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LSRU-115-OR-2

P1-P2
© 2016 Littelfuse Protection Relays & Controls
Protection Relays
Current Monitoring Relays and Transducers
www.littelfuse.com/lsru
Rev: 1-A-062716
LSRU SERIES
Load sensor
Description
The LSRU Series is a microcontroller-based family of load
sensors. The LSRU family of products employ three basic
types of control logic: motor control logic, alarm logic and feed
control logic.
Motor Control Logic
Several combinations of functions are available in the LSRU,
including overcurrent and undercurrent or either overcurrent
or undercurrent with variable trip, restart or extended restart
delay settings. These various versions of the LSRU trip on the
respective fault and then automatically reset after the restart
delay expires, in preparation for the next motor start. LSRUs
do not trip on undercurrent when the load turns off, this is
recognized as a normal condition.
Alarm Logic
The LSRU-AL simply indicates whether the current is between
the setpoints or outside of the setpoints. This product is best
used with a PLC or other controller where status indication
is desired.
Feed Control
The LSRU-FC is a load monitor intended to control feeder
mechanisms in a variety of applications. It stops the feeder
when the grinder, chipper, saw, auger, etc. nears overload. When
the load is reduced to a preset level, the feeder is restarted.
Features & Benefits
FEATURES BENEFITS
LED indicator Visual indication of relay status
Built in current sensor
Eliminates the need for a stand alone current
transformer and also provides isolation between the
monitored and control circuits
Adjustable current
sensing range
Provides ability to precisely set the current trip point
for any application
Wiring Diagram
Ordering Information
See next page.
© 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
P1-P2

LSRU-115-OR-2

Mfr. #:
Buy LSRU-115-OR-2
Manufacturer:
Littelfuse
Description:
Industrial Relays LOADSENSOR/115V/5-25 A/OCT
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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