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BE SURE POWER IS DISCONNECTED PRIOR TO INSALLATION!
FOLLOW NATIONAL, STATE, AND LOCAL CODES!
READ THESE INSTRUCTIONS ENTIRELY BEFORE INSTALLATION!
The Model LSRU Load Sensor uses current levels to determine feed rates,
tool wear, loss of prime on pumps, mixer viscosity, and all types of over and
under load conditions. The LSRU may also be used to stage pump motors,
chillers, and other machinery.
1. Mount the Model LSRU near one of the conductors of the load being
monitored. If the unit will be used in a dusty or wet environment, an
appropriate NEMA rated enclosure should be used.
2. Insert one of the conductors of the load through the sensor hole in the LSRU.
a) For currents greater than 1 amp, proceed to step #3.
b) For currents less than 1 amp, the conductor must be looped. Refer
to the table below to determine the number of conductors needed
through the sensor window.
NOTE: The OC and/or UC trip points must be set based on 'I
current range 1.5 units.
ACTUAL CURRENT
0.5 – 1.0
0.25 – 0.5
3. Turn the user adjustments to the desired settings.
4. Wire the appropriate control voltage to L1 and L2.
5. Connect the output relay to the control circuitry. The proper wiring scheme
may vary depending on the required action when a fault occurs. (A wiring
diagram is shown in Figure 1 that utilizes the NO contact.)
NUMBER OF CONDUCTORS
For values less than 0.25 consult the factory.
INSTALLATION INSTRUCTIONS
FOR SYMCOM'S MODEL
3
5
2880 North Plaza Drive, Rapid City, SD 57702
(800) 843-8848 · (605) 348-5580
LSRU
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EFFECTIVE CURRENT (I
1.5 – 3.0
1.25 –2.5
www.symcom.com
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Table of Contents
Related Manuals for Motor Saver LSRU Series
Summary of Contents for Motor Saver LSRU Series
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Page 1: Installation Instructions
INSTALLATION INSTRUCTIONS FOR SYMCOM’S MODEL LSRU BE SURE POWER IS DISCONNECTED PRIOR TO INSALLATION! FOLLOW NATIONAL, STATE, AND LOCAL CODES! READ THESE INSTRUCTIONS ENTIRELY BEFORE INSTALLATION! The Model LSRU Load Sensor uses current levels to determine feed rates, tool wear, loss of prime on pumps, mixer viscosity, and all types of over and under load conditions. - Page 2 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.
- Page 3 MODEL LSRU SPECIFICATIONS CONTROL VOLTAGE 18 – 30 VAC LSRU-024-xx-x LSRU-115-xx-x 90 – 135 VAC FREQUENCY 50 to 60 Hz POWER 2 Watts (Maximum) CURRENT RANGE LSRU-xxx-xx-1.5 0 – 10 Amps LSRU-xxx-xx-2 5 – 25 Amps LSRU-xxx-xx-3 25 – 100 Amps ADJUSTMENTS Overcurrent (cannot be set below UC) Adjustable through entire current range...
- Page 4 Visit us at www.symcom.com to see our complete product listing! Can t find what you re looking for? SymCom designs and manufactures custom control boards too. Call us for details! 2880 North Plaza Drive, Rapid City, SD 57702 (800) 843-8848 · (605) 348-5580 www.symcom.com 2/08...
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