© 2016 Littelfuse Protection Relays & Controls
Protection Relays
Current Monitoring Relays and Transducers
www.littelfuse.com/lsr0
Rev: 1-A-062716
Description
The LSR-0 is a self-powered load sensor intended for use as a
proof relay. It is used to verify that current is flowing as intended.
It has a guaranteed 15A pull-in current and 2.5A drop-out current.
Proof relays are typically used to interlock fans, compressors,
motors, heating elements and other devices. The LSR-0 is
self-powered, that is, it draws its power from the wire being
monitored so it does not require separate control power wiring.
Features
J
Self-powered
J
Low cost proof relay
J
Can monitor up to 135A loads
Specifications
Max Current Ratings 135A continuous
Functional Characteristics
Turn-on Threshold Fixed, 15A (max.)*
Turn-off Threshold 2.5A (min.)
Power Induced from conductor
Isolation 600VAC rms
Output Characteristics
Relay Output Rating:
Pilot Duty 480VA @ 240VAC
General Purpose 10A
General Characteristics
Temperature Range -20° to 70°C (-4° 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 0.35 lb. (5.6 oz., 158.76 g)
Mounting Method Four #6 screws 3/4” in length
*Conductors may be looped for smaller motor applications.
Caution: This product should not be relied upon solely for safety of life or safety applications.
Self-powered load sensor/low-cost
proof relay
LSR-0
Wiring Diagram
TYPICAL WIRING DIAGRAM FOR REFRIGERATION AND
OIL FAILURE CONTROL
TYPICAL WIRING DIAGRAM FOR BUILDING AUTOMATION
TYPICAL WIRING DIAGRAM FOR BUILDING AUTOMATION
