Documentation & Downloads
Littelfuse 777-TS 777-TS - 777 Series
- MPN: 777-TS
- UPC: 079458991154
- PPN: LTF-777-TS
CAD
$1363.92
/ EA
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Spec sheet
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.
Documentation & Downloads
Specifications
Key Specifications
- Input Voltage (V)
- 200 to 480VAC
- Input AC Line Frequency (Hz)
- 50/60Hz
- Output Load Rating (VA)
- Pilot Duty: 480VA @ 240VAC B300; General Purpose: 10A @ 240VAC
- Timing Accuracy (%)
- 5% ±1s
- 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)
- Overvoltage Trip Voltage (%)
- LV setting - 528V
- Voltage Unbalance Trip Point (%)
- 2 - 15% or 999
- Overcurrent Trip Point
- (20A - 100A) … MULT of 80 - 120% of CT primary
- Undercurrent Trip Point
- (0 10 - 98 Amps) … MULT or 40 - 140% of CT primary
- Current Unbalance Trip Point (%)
- 2 - 25% or 999
- Current Accuracy (%)
- ±3% (<100 amps direct)
- Ground Fault Trip Delay (s)
- % of setpoint / Trip time: 101 - 200% / 8s ± 1s; 30s; 201 - 300% / 4s ± 1s; 301 - 400% / 3s ± 1s; 401%+ / 2s ± 1s
- Sensor Hole Size
- Max conductor size: 0.65 in (with insulation)
- Surge Protection
- IEC: 61000-4-5 Level 3 2kV line-to-line; Level 4 4kV line-to-ground
- Pollution Degree
- 3
- Address
- A01 - A99
- Termination Type
- Torque: 7in-lbs
- Operating Temperature
- -20° to 70°C (-4° to 158°F)
- Humidity
- 10-95% non-condensing per IEC 68-2-3
- Weight (lbs/g)
- 1.56 lbs. (25.0 oz. 707.6 g)
Maximum Input Power10W
Output FormSPDT - Form C
Full Load Amp Range (A)2 - 25A 3 phase (loops required); 25 - 90A 3 phase (direct); 80 - 800A 3 phase (external CTs)
Rapid Cycle Timer (s)0 2 - 500s
Repeat Accuracy (%)Voltage: ±0.5% of nominal voltage; Current: ±1% (<100 amps direct)
Undervoltage Trip Voltage170V - HV setting
Voltage Accuracy (%)±1%
Overcurrent Trip Class5 J5 10 J10 15 J15 20 J20 30 J30
Undercurrent Trip Delay (s)2 - 60s
Current Unbalance Trip Delay (s)% over setpoint / Trip time: 1% / 30s; 2% / 15s; 3% / 10s; 4% / 7.5s; 5% / 6s; 6% / 5s; 10% / 3s; 15% / 2s
Ground Fault Current Trip Point (A)(3 - 20A) … MULT or 10 - 30% of primary CT or OFF
Ground Fault Accuracy (%)±15%
Short Circuit (kA)100kA
Protection ClassIP20
CT Ratio1 - 10 conductors or 100 - 800 ratio
LifeElectrical: 1 x 105 operations at rated load; Mechanical: 1 x 106
Mounting MethodSurface mount (4 - #8 screws) on DIN rail mount
Storage Temperature (F/C)-40° to 80°C (-40° to 176°F)
Dimensions3.05 H x 3.85 W x 5.05 D in. (77.5 x 97.8 x 128.3 mm)
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CAD
$1363.92
/ EA
Available to Order
Lead times may vary. For an accurate estimate please contact us.
Company Stock:
0
Looking to buy a large quantity?
To View Branch Inventory And Your Custom Pricing
Spec sheet
CAD$1363.92/ EA
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