Littelfuse SymCom 777-HVR-P2 Series MotorSaver.

Littelfuse SymCom 777-HVR-P2 MotorSaver is a fully programmable electronic overload relay designed to monitor and protect any 3-phase 340-480VAC motor drawing 2-800 full load amps (external CTs are required above 90 amps). This unit’s Form C contacts are pilot duty rated at 470VA @ 600VAC for applications where a control power transformer (CPT) is not used on a 480V system. The unit provides unsurpassed protection from faulty voltage, underload and overload conditions. Common applications include conveyor systems, HVAC equipment, saws and grinders, fan motors and almost any pumping application, to save the cost and extra wiring associated with a CPT. The -LR (low range) models allow for easier installation in low amperage applications.

The 777-HVR-P2 units can be used as a stand-alone product or the RS-485 communications port can be used to form a network to communicate with a PC, PLC or SCADA system. The 777-HVR-LR-P2 units can be used with CIO modules produced by SymCom for several types of communication protocols. Up to 99 model 777-HVR-P2 units can be networked together and monitored and controlled by SymCom’s Solutions software. The units can also be connected to SymCom’s remote monitors for a simple, cost-effective way to meet new requirements for arc-flash safety.

The 777-HVR-P2 units incorporate a 3-digit LED display that is used for programming, providing real-time operational information, and displaying diagnostic codes to aid in troubleshooting a fault condition.

The unit’s many features include enhanced trip classes beyond the NEMA standard trip classes. The settable trip class range is 2-60, with or without jam protection, and a secondary linear trip delay can be set with a range of 0-60 seconds. If both trip class and linear trip delay are set, the 777-HVR-LR-P2 will follow the faster trip time. Another feature is the automatic dry-well recovery timer that allows the unit to automatically select a restart delay based on the last cycle’s run time. This allows the 777-HVR-LR-P2 to optimize restart delay times.

The units can be pre-programmed with a 9-volt battery prior to actual installation. This can save a lot of time during initial installations and avoid subsequent service calls when commissioning new projects.

AUXILIARY PRODUCTS:
• Remote Displays (RM-1000/RM-2000)
• Communication Modules
• Remote Manual Reset Kit
• Solutions Software

Protects 3-Phase Motors From:
• Low voltage
• High voltage
• Voltage unbalance
• Reverse-phase
• Overcurrent
• Undercurrent
• Current unbalance
• Single-phase

Other Features:
• Network programmable
• Programmable with 9-volt battery prior to installation
• Automatic reset with three separate restart delay timers, or manual reset
• Tamper guard
• RS-485 communications port (communications module sold separately)
• 3-digit LED diagnostic display
• Last fault memory

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.