Littelfuse SymCom 601 MotorSaver Protection Relay.

Littelfuse 601 SymCom MotorSaver is a fully-programmable voltage monitor designed to protect 3-phase motors from loss of any phase (single-phasing), phase reversal, low or high voltage, voltage unbalance, low or high frequency, and rapid cycling. It can be used as a stand-alone product or networked with an RM1000, RM2000, PLC, computer or SCADA system. When a harmful condition is detected, the 601’s output relay is deactivated after the specified trip delay. The output relay reactivates after power line conditions return to an acceptable level for the programmed restart delay (RD2).

Protects 3-Phase Motors From:
• Single-phasing
• Phase reversal
• Phase/Frequency shift
• Low voltage
• High voltage
• Voltage unbalance
• Rapid cycling

Features:
• Line to line voltages, average voltage, voltage unbalance, and frequency can be viewed while motor is running.
• Digitally programmable for precise customization.
• Last four fault memory provides instant troubleshooting diagnostics.
• Eleven parameters can be programmed for maximum protection.
• Will detect single phase condition regardless of regenerated voltages.
• RS485 communication port for use with computerized systems. 

LED Display Features:
The following 11 parameters can be viewed from the three digit LED display or from a networked computer: low voltage set point, high voltage set point, voltage unbalance set point, low frequency set point, high frequency set point, trip delay for voltage/frequency faults, trip delay for single phase faults, Rapid Cycle Timer (RD1), Restart Delay after all faults (RD2), type of restart after all faults (Manual or Automatic), and RS485 address. Six parameters can be viewed as the motor is running: L1-L2 voltage L2-L3 voltage, L1-L3 voltage, average voltage, percent voltage unbalance, and frequency.

• Fully Programmable
• Automatic or Manual Reset, Remote reset
• Tamper Guard
• Surface mount or Din Rail Mount
• LED diagnostic display
• Last Four Fault Memory 

The Model 601 can be used with an optional RS485 module allowing up to 99 Model 601, Model 777, or Model 77C units to be linked together. From the computer, an operator can control the motor, view the operating parameters, or log information. Software sold separately.

Disclaimer Notice: Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.