Littelfuse
777VA-02
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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 200-480VAC 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.- Part Number
- 777VA-02
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Specifications
- Input Voltage (V)
- 200 to 480VAC
- Maximum Input Power
- 10W
- Input AC Line Frequency (Hz)
- 50/60Hz
- Output Form
- SPDT - Form C
- Output Load Rating (VA)
- Pilot Duty: 480VA @ 240VAC B300; General Purpose: 10A @ 240VAC
- Full Load Amp Range (A)
- 2 - 25A (looped conductors required); 25 - 90A (direct); 80 - 800A (external CTs required)
- Timing Accuracy (%)
- 5% ±1s
- Rapid Cycle Timer (s)
- 0 2 - 500m
- Restart Delay Range
- All faults: 2 - 500m; # of Restarts: All faults except undercurrent: 0 1 oc1 2 oc2 3 oc3 4 oc4 A ocA (Automatic); Undercurrent: 0 1 2 3 4 A (Automatic)
- Repeat Accuracy (%)
- Voltage: ±0.5% of nominal voltage; Current: ±1% (<100 amps direct)
- Overvoltage Trip Voltage (%)
- 172 - 528V
- Undervoltage Trip Voltage
- 170 - 524V
- Voltage Unbalance Trip Point (%)
- 2 - 15% or 999
- Voltage Accuracy (%)
- ±1%
- Overcurrent Trip Point
- (20A - 100A) … MULT of 80 - 140% of CT primary
- Overcurrent Trip Class
- 02 - 30 J02 - J30 L00 - L60 or OFF
- Undercurrent Trip Point
- (0 10 - 98 Amps) … MULT or 40 - 140% of CT primary
- Undercurrent Trip Delay (s)
- 2 - 255m (standard)
- Current Unbalance Trip Point (%)
- 2 - 25% or 999
- Current Accuracy (%)
- ±3% (<100 amps direct)
- Ground Fault Current Trip Point (A)
- (3 - 20A) … MULT or 12 - 80% of primary CT or OFF
- Ground Fault Accuracy (%)
- ±15%
- Sensor Hole Size
- Max conductor size: 0.65 in (with insulation)
- Short Circuit (kA)
- 100kA
- Surge Protection
- IEC: 61000-4-5 Level 3 2kV line-to-line; Level 4 4kV line-to-ground
- Protection Class
- IP20
- Pollution Degree
- 3
- CT Ratio
- 1 - 10 100 150 200 300 400 500 600 700 800
- Address
- A01 - A99
- Life
- Electrical: 1 x 105 operations at rated load; Mechanical: 1 x 106
- Termination Type
- Torque: 7in-lbs
- Mounting Method
- Surface mount (4 - #8 screws) on 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)
- Humidity
- 10-95% non-condensing per IEC 68-2-3
- Dimensions
- 3.05 H x 3.85 W x 5.05 D in. (77.5 x 97.8 x 128.3 mm)
- Weight (lbs/g)
- 1.56 lbs. (25.0 oz. 707.6 g)
Documents
Data Sheet
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