Littelfuse 777-TS Pump Monitor Product Description

The 777 is a fully programmable electronic overload relay designed to protect any motor drawing 2-800 full load amps (external CTs are required above 90 amps). The 777 (family of products) is for 3-phase 200-480 V ac applications, with several specialized units for other voltage ranges and unique applications. Common applications include conveyor systems, HVAC equipment, saws and grinders, fan motors, and almost any pumping application. Some unique applications include use with a Subtrol* equipped Franklin submersible motor to detect high motor temperatures and applications where a fast linear trip is required.

All of the overload relays provide unsurpassed protection by combining overload, voltage, phase loss and reversal, voltage and current unbalance, power monitoring, and underload based on current in one package. For standalone applications, the 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 units also feature a communications port that can be used with communication modules listed in the 777 accessories section to form a Modbus, DeviceNet*, Profibus, or Ethernet network. Up to 99 units can be remotely monitored and controlled from a PC, PLC, or SCADA system, and data logging through a PC with the optional Solutions software. This capability allows for a simple, cost-effective way to meet new requirements for arc-flash safety.

Model 777-TS provides 480 VA @ 240 V ac output SPDT relay contacts. For use with Subtrol equipped Franklin submersible motors to detect high motor temperatures.

Littelfuse 777-TS Pump Monitor Typical Application

• Conveyor Systems
• HVAC Equipment
• Saws and Grinders
• Fan Motors
• All Pumping Applications With Single-Phase Electric motors

Littelfuse 777-TS Pump Monitor Technical Details

• Protects 3-Phase Motors From:
  • Overload
  • Underload
  • Jams
  • Undervoltage
  • Over Voltage
  • Single Phasing
  • Unbalance (voltage & current)
  • Ground Fault (class II)
  • Rapid Cycling
  • Phase Reversal
  • Ground Fault Current Alarm/Trip
• 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
• Remote Reset
• Last Fault Memory
• UL and cUL Listed
• CE Compliant
• CSA Approved
• Surface or DIN Rail Mount
• 5-year Warranty
• Made in USA

Littelfuse 777-TS Pump Monitor Specifications

Line Voltage . . . . . . . . . . . . . . . . . . . . . 200-480VAC

Frequency . . . . . . . . . . . . . . . . . . . . 50/60Hz

TC-Overcurrent Trip Class (777 Plus Series units) . . . . . . . 02-60, J02-J60, L00-L60 or Off

TC-Overcurrent Trip Class (77C, 777 non-Plus Series units). . . . . 5, 10, 15, 20, 30 (J prefix enables jam protection feature)

Output Contact Rating

Ambient Temperature Rating

Accuracy

Repeatability

Maximum Input Power . . . . . . . . . . . . . 10 W

Class of Protection . . . . . . . . . . . . . IP20

Relative Humidity . . . . . . . . . . . . . 10-95%, non-condensing per IEC 68-2-3

Terminal Torque . . . . . . . . . . . .7 in.-lbs.

Electorstatic Discharge (ESD) . . . . . . . . . IEC 61000-4-2, Level 3, 6kV contact, 8kV air

Radio Frequency Immunity (RFI), Conducted . . . . . . . . .IEC 61000-4-6, Level 3 10V/m

Radio Frequency Immunity (RFI), Radiated . . . . . . . . .IEC 61000-4-3, Level 3 10V/m

Fast Transient Burst . . . . . . . . .IEC 61000-4-4, Level 3, 3.5kV input power

Short Circuit . . . . . . . . .100kA

Surge

Safety Marks

Weight . . . . . . . . . . . . . . . . . . . . . . . . 24.96 oz.

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Littelfuse 777-TS PumpSaver Pump Monitor Resources

Littelfuse 777-TS Product Specifications

Littelfuse 777-TS Installation Bulletin

Littelfuse 777-TS Engineering Specifications

Littelfuse 777-TS Programming Guide