Littelfuse 77C-LR, 77C Series, Single-Phase Current & Voltage Monitor, 100-240VAC, 1-9A only, Provides 480VA @ 240 V ac output SPDT relay contacts

In stock
SKU: 77C-LR
Regular price $748.29
Rated voltage

Use this text to encourage communication or promote sharing on social networks.

You can also add links

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, 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.

Applications
• Conveyor systems
• HVAC equipment
• Saws and grinders
• Fan motors

Pre-order 6-8 Weeks

Specifications

Functional Characteristics  
Frequency 50/60 Hz
TC- Overcurrent Trip Class (77C, 777 non-Plus Series units) 5, 10, 15, 20, 30 (J prefix enables jam protection feature)
Output Characteristics
Output Contact Rating (SPDT - Form C) Pilot duty rating         480 VA @ 240 V ac, B300
General purpose         10 A @ 240 V ac
Pilot duty rating for HVR models          470 VA @ 600 V ac, B600
General Characteristics
Ambient Temperature Range Operating        -20 °C to 70 °C (-4 °F to 158 °F)
Storage            -40 °C to 80 °C (-40 °F 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
Pollution Degree 3
Class of Protection IP20
Relative Humidity 10-95 %, non-condensing per IEC 68-2-3
Terminal Torque 7 in.-lbs
Standards Passed
Electrostatic Discharge (ESD) IEC 61000-4-2, Level 3, 6 kV contact, 8 kV air
Radio Frequency Immunity (RFI) Conducted     IEC 61000-4-6, Level 3 10 V/m
Radiated        IEC 61000-4-3, Level 3 10 V/m
Fast Transient Burst IEC 61000-4-4, Level 3, 3.5 kV input power
Short Circuit 100 kA
Surge
IEC 61000-4-5, Level 3, 2 kV line-to-line; Level 4, 4 kV line-to-ground
ANSI/IEEE C62.41 Surge and Ring Wave Compliance to a level of 6 kV line-to-line
Hi-potential Test Meets UL 508 (2 x rated V +1000V for 1 minute)
Vibration IEC 68-2-6, 10-55 Hz, 1 mm peak-to-peak, 2 hours, 3 axis
Shock IEC 68-2-27, 30 g, 3 axis, 11 ms duration, half-sine pulse
Maximum Conductor Size (with insulation) through 77C 0.65”
Dimensions H 77.47 mm (3.05”)
W 97.79 mm (3.85”)
D 128.27 mm (5.05”)
Weight 1.56 lbs. (24.96 oz., 707.6 g)
Mounting Method Surface mount (4 - #8 screws) or DIN rail mount
Certification & Compliance UL            UL 508, UL 1053 (File #E68520)
CE            IEC 60947-1, IEC 60947-5-1
CSA         C22.2