Motor Protection Brochure
Learn about our voltage and phase monitors, ground fault relays, overload relays, and motor protection systems.
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777-FT
3-PHASE OVERLOAD RELAY/ 190-48 | Series: 777The 777-FT three-phase current and voltage monitor provides motor protection with input voltage from 200–480 V ac and motor full load ampere range as follows: 2–25 A: 3-phase (looped conductors required); 25–90 A: 3-phase (direct); 80–800 A: 3-phase (external CTs).
| Property | Value |
|---|---|
Input Voltage (V) | 200 - 480 Vac |
Output Form | SPDT - Form C |
Termination Type | Torque: 7 in-lbs |
Full Load Amp Range (A) | 2 - 25: 3 phase (looped conductors required); 25 - 90: 3 phase (direct); 80 - 800: 3 phase (external CTs) |
Dimensions | 3.05 H x 3.85 W x 5.05 D in. (77.5 x 97.8 x 128.3 mm) |
Weight (kg) | 0 Kg (kilogram) |
Overcurrent Trip Class | 5; J5; 10; J10; 15; J15; 20; J20; 30; J30; J100 (J100 = Linear) |
Overcurrent Trip Point | (20 - 100 A) … MULT of 80 - 120% of CT primary |
Address | A01 - A99 |
Current Accuracy (%) | ±3% (<100 A direct) |
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 |
Current Unbalance Trip Point (%) | 2 - 25% or 999 (disabled) |
Ground Fault Accuracy (%) | ±15% |
Ground Fault Current Trip Point (A) | (3 - 20) … MULT or 10 - 30% of primary CT or OFF |
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 |
Humidity | 10 - 95% non-condensing per IEC 68-2-3 |
Input AC Line Frequency (Hz) | 50 / 60 |
Maximum Input Power (W) | 10 |
Motor Acceleration Time Operating Point (s) | (0 to 500) x 0.158s = (0 to 79s) |
Number of Conductors or CT Ratio | 1 - 10; or 100 - 800 ratio |
Output Load Rating (VA) | Pilot Duty: 480 VA @ 240 Vac B300; General Purpose: 10 A @ 240 Vac |
Overvoltage Trip Voltage (%) | LV setting - 528 V |
Pollution Degree | 3 |
Protection Class | IP20 (finger safe) |
Rapid Cycle Timer (s) | 0; 2 - 500 s (x0.5 if TC = J100) |
Repeat Accuracy (%) | Voltage: ±0.5% of nominal voltage; Current: ±1% (<100 A direct) |
Restart Delay Range | All faults: 2 - 500 m (x0.5 if TC = J00); # 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) |
Sensor Hole Size | Max conductor size: 0.65 in (with insulation) |
Short Circuit (kA) | 10 |
Surge Protection | IEC: 61000-4-5 Level 3 2 kV line-to-line; Level 4 4 kV line-to-ground |
Timing Accuracy (%) | 5% ±1 s |
Trip Delay Type | Overcurrent: (2 - 500) x 0.158 s = (0.32 - 79 s) |
Undercurrent Trip Delay (s) | 2 - 60 s |
Undercurrent Trip Point | 0; 10 - 98 A … MULT or 40 - 100% of CT primary |
Undervoltage Trip Voltage (%) | 170 V - HV setting |
Voltage Accuracy (%) | ±1% |
Voltage Unbalance Trip Point (%) | 2 - 15% or 999 |
Mounting Method | Surface mount (4 - #8 screws) or DIN rail mount |
Operating Temperature Max (°C) | 70 |
Operating Temperature Maximum Fahrenheit | 158 |
Operating Temperature Minimum Celsius | -20 |
Operating Temperature Minimum Fahrenheit | -4 |
Storage Temperature Maximum Celsius | 80 |
Storage Temperature Maximum Fahrenheit | 176 |
Storage Temperature Minimum Celsius | -40 |
Storage Temperature Minimum Fahrenheit | -40 |
777-FT Resources
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| Part Number | Part Description | RoHS | Pb-Free | RoHS (2015/863/EU) Certificate | REACH (SVHC's) Declaration | REACH (SVHC's) | Halogen Free | IPC-Material Declaration | |
|---|---|---|---|---|---|---|---|---|---|
| 777-FT | 3-PHASE OVERLOAD RELAY/ 190-48 | View More |
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