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To ensure accuracy, please note that images may be representative. Refer to the product data sheet for detailed specifications.
| Manufacturer | Symcom / Littelfuse |
| Manufacturer Product Number | 777-575-P2 |
| Description | Phase Monitor Relay; OL/UL/PL/PR/Unbal/UV/OV+Pwr; 3-Phase; 500-600V; 2-800A FLA |
| Datasheet | Download Datasheet |
The Littelfuse SymCom 777-575-P2 is a 3-phase electronic motor overload relay for 500-600 V AC motors drawing 2-800 full-load amps (external CTs required above 90 A). It protects against overload, underload, phase loss, phase reversal, voltage and current unbalance, undervoltage and overvoltage, low and high power (network programmable). Built for: 575 V utility services (Canada and the north-east US).
Overcurrent trip class: 02-60, J02-J60, L00-L60 or Off (J enables jam protection, L linear trip). Restart delays: 3 programmable timers: rapid cycle, motor cool-down and dry-well recovery. Reset: Automatic, semi-automatic or manual (selectable); push button on the relay or remote with a 777-MRSW or OL-Reset kit. Display: 3-digit LED display: programming, real-time voltage and current, last fault code. Networking: Modbus, DeviceNet, Profibus or Ethernet via optional communication module; up to 99 units networked.
Output: 1C SPDT, 10 A at 240 V AC. Mounting: DIN Rail/Panel Mount. Dimensions: 77.47 x 97.79 x 128.27 mm (3.05 x 3.85 x 5.05 in), H x W x D.
It operates from -20 to +70 °C and can be stored from -40 to +80 °C. Approvals: UL 508, UL 1053, CSA C22.2, CE.
| Category | |
| Manufacturer | Symcom / Littelfuse |
| Model | 777 |
| Monitoring Function | Overload, Underload, Phase Loss, Phase Reversal, Voltage and Current Unbalance, Undervoltage and Overvoltage, Low and High Power (network programmable) |
| Special Application | 575 V utility services (Canada and the north-east US) |
| Number of Phases | 3-Phase |
| Input Voltage | (500...600)V AC |
| Motor Full Load Current Range | 2-800 A (external CTs required above 90 A) |
| Overcurrent Trip Class | 02-60, J02-J60, L00-L60 or Off (J enables jam protection, L linear trip) |
| Restart Delay (s) | 3 programmable timers: rapid cycle, motor cool-down and dry-well recovery |
| Reset Method | Automatic, semi-automatic or manual (selectable); push button on the relay or remote with a 777-MRSW or OL-Reset kit |
| Status Indicator | 3-digit LED display: programming, real-time voltage and current, last fault code |
| Communication Protocol | Modbus, DeviceNet, Profibus or Ethernet via optional communication module; up to 99 units networked |
| Contact Configuration | 1C SPDT |
| Output Rating | 10 A at 240 V AC |
| Mounting Type | DIN Rail/Panel Mount |
| Dimensions | 77.47 x 97.79 x 128.27 mm (3.05 x 3.85 x 5.05 in), H x W x D |
| Operating Temperature (Storage) | -20...+70 °C (-40...+80 °C) |
| Approvals | UL 508, UL 1053, CSA C22.2, CE |