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  • Littelfuse-Symcom 77C Phase Monitor Relays

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    77C

    Manufacturer Symcom / Littelfuse
    Manufacturer Product Number 77C
    Description 1-Phase Overload Relay/100-240
    Datasheet Download Datasheet

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    Product Description

    Description: 1-Phase Overload Relay/100-240V/2-800FLA

          Product Information       Resources
    ManufacturerLittelfuse - Symcom
    Product Category Monitors
    Product Sub Category Phase Monitor Relays
    Series7C Series
    		 
      Download Datasheet
          Specifications
    Product Attribute
    		Attribute Value
    Input Voltage (V)100 - 240 Vac
    Maximum Input Power10
    Input AC Line Frequency (Hz)50 / 60
    Output FormSPDT - Form C
    Output Load Rating (VA)Pilot Duty: 480 VA @ 240 Vac B300; General Purpose: 10 A @ 240 Vac
    Full Load Amp Range (A)2 - 25 (looped conductors required); 26 - 90 (direct); 91 - 800 (external CTs required)
    Timing Accuracy (%)5% ±1 s
    Rapid Cycle Timer (s)0; 2 - 500 s
    Restart Delay RangeAfter Under/Overcurrent: 2 - 500 m/s; # of Restarts: Overcurrent: 0; 1; oc1; 2; oc2; 3; oc3; 4; oc4; A (Automatic); OCA; Undercurrent: 0; 1; 2; 3; 4; A (Automatic)
    Repeat Accuracy (%)Voltage: ±0.5% of nominal voltage; Current: ±1% (direct; no external CTs)
    Overvoltage Trip Voltage (%)85V - HV setting
    Undervoltage Trip VoltageLV setting - 264 V
    Voltage Accuracy (%)±1%
    Overcurrent Trip Point(20 - 100 A) … MULT of 80 - 120% of CT primary
    Overcurrent Trip Class5; J5; 10; J10; 15; J15; 20; J20; 30; J30; or lin (linear)
    Undercurrent Trip Point0; 10 - 98 A … MULT or 40 - 100% of CT primary
    Undercurrent Trip Delay (s)2 - 60 s
    Current Accuracy (%)±3% (<100 A direct)
    Ground Fault Accuracy (%)±15%
    Sensor Hole SizeMax conductor size: 0.65 in (with insulation)
    Short Circuit (kA)UL: 100; CSA: 10
    Surge ProtectionIEC: 61000-4-5 Level 3 2 kV line-to-line; Level 4 4 kV line-to-ground
    Protection ClassIP20; NEMA 1 (finger safe)
    Pollution Degree3
    CT Ratio1 - 10; or 100 - 800 ratio
    AddressA01 - A99
    Termination Type7 in.-lbs.
    Mounting MethodSurface mount (4 - #8 screws) or DIN rail mount
    Operating Temperature-20° to 70°C (-4° to 158°F)
    Storage Temperature (F/C)-40° to 80°C (-40° to 176°F)
    Humidity10 - 95% non-condensing per IEC 68-2-3
    Dimensions3.05 H x 3.85 W x 5.05 D in. (77.5 x 97.8 x 128.3 mm)
          Series Features
    77C Series - Single-Phase Current & Voltage Monitor
    Series Description: The single-phase 77C unit is a fully-programmable, electronic overload relay designed to protect any motor drawing 2-800 full load A (external CTs are required above 90 A). Common applications include conveyor systems, HVAC equipment, saws and grinders, fan motors, and almost any pumping application. The 77C and 777-HVR-SP (family of products) are for single-phase 100-240 V ac applications.

    All of the overload relays provide unsurpassed protection by combining overload, underload, and voltage in one unit. 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. These units also feature a communications network port that can be used with communication modules, listed in the 777 accessories section, to form a Modbus, DeviceNetTM, 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.
    Series Applications: Conveyor systems, HVAC equipment, Saws and grinders, Fan motors
    • Built-in display: Visual indication for programming, viewing real-time voltage or current, and last fault code
    • Programmable voltage and current settings: Allows usage on a wide range of systems
    • 3 selectable restart options: Choose from automatic, semi-automatic, or manual to best meet individual application needs
    • 3 programmable restart delay timers: Program separate restart delay time for rapid cycle protection, motor cool down, and dry-well recovery
    • Remote display compatibility: Increases safety through remote display of real-time data and fault history. Aids with arc-flash safety regulations
    • Flexible reset: Reset can be done through pushbutton on relay or remotely with optional 777-MRSW or OL-Reset remote reset kit

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