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Littelfuse 77C-LR Pump Monitor Overload Relay 100-240V Single Phase 1-9FLA

Littelfuse 77C-LR Pump Monitor Overload Relay 100-240V Single Phase 1-9FLA

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SKU : MSR77CLR

In Stock Quantity:0

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Brand : Littelfuse/Symcom
$552.68 USD
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Description

Littelfuse 77C-LR Pump Monitor Product Description

The 777/ 77C 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). Common applications include conveyor systems, HVAC equipment, saws and grinders, fan motors, and almost any pumping application.

All of the overload relays provide unsurpassed protection by combining overload, underload, and voltage 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.

The 77C-LR provides 480VA @ 240VAC output SPDT relay contacts

Littelfuse 77C-LR Pump Monitor Typical Application

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

Littelfuse 77C-LR Pump Monitor Technical Details

  • Protects Single-Phase Motors From:
    • Overload
    • Underload
    • Jams
    • Low Voltage
    • High Voltage
    • Rapid Cycling
  • Fully Programmable
  • 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

Specifications

Littelfuse 77C-LR Pump Monitor Specifications

Line Voltage . . . . . . . . . . . . . . . . . . . . . 100-240VAC

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

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

Output Contact Rating

  • SPDT-Form C . . . . . . . . . . . . . . . .480VA @ 240VAC, B300 Pilot Duty
  • . . . . . . . . . . . . . . . . . . . . 10A @ 240VAC General Purpose

Ambient Temperature Rating

  • Operating. . . . . . . . . . . . . . . . . -20° to 70°C (-4° to 158°F)
  • Storage. . . . . . . -40° to 80°C (-40° to 176°F)

Accuracy

  • Voltage. . . . . . . . . . . . . . . . . . . . . . . . ±1%
  • Current . . . . . . . . . . . . . . . . . ±3%(<100 amps direct)
  • GF Current. . . . . . . . . . . ±15%
  • Timing (77C, 777 non-Plus Series units) . . . . . . . . . . 5% +1 second

Repeatability

  • Voltage. . . . . . . . . . . . . . . . . . . . . . . . ±0.5% of nominal voltage
  • Current . . . . . . . . . . . . . . . . . . . . . . ±1% (<100 amps direct)

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

  • IEC . . . . . . . . . 61000-4-5, Level 3, 2kV line-to-line; Level 4, 4kV line-to-ground
  • ANSI/IEEE. . . . . . .C62.41 Surge and Ring Wave Compliance to a level of 6kV line-to-line
  • Hi-Potential Test . . . . . . . . . . . . . . . . .Meets UL508 (2 x rated V +1000V for 1 minute)
  • Vibration . . . . . . . . . . . .IEC 68-2-6, 10-55Hz, 1mm peak-to-peak, 2 hours, 3 axis
  • Shock . . . . . . . . . IEC 68-2-27, 30g, 3 axis, 11ms duration, half-sine pulse

Safety Marks

  • UL . . . . . . . . . UL508, UL1053 (File #E68520)
  • CE. . . . . . .IEC 60947-1, IEC 60947-5-1
  • CSA . . . . . . . . . . C22.2

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

Mounting Method . . . . . . . . . . . . . . . .Surface mount (4 - #8 screws) or DIN rail mount


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

Resources

Littelfuse 77C-LR Pump Monitor Resources

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Littelfuse 77C-LR Product Specifications

Littelfuse 77C-LR Installation Bulletin

Littelfuse 77C-LR Engineering Specifications

Warranty
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