GE 339-E-P5-G5-H-E-S-N-N-SN-D-N – GE Multilin 339 Series Motor Protection Relay

Technical Specifications

• Manufacturer: GE Multilin (General Electric)
• Model: 339-E-P5-G5-H-E-S-N-N-SN-D-N
• Series: 339 Motor Protection System
• Type: Microprocessor-based motor protection relay
• Phase Current Inputs: 5 A (3-phase)
• Ground Current Input: 5 A
• Contact Inputs: 10 (dry contact)
• Output Relays: 2 × Form A, 5 × Form C
• Power Supply: 110–250 VDC / 110–230 VAC (universal)
• Communication: Front USB 2.0, Rear RS-485 (Modbus RTU)
• Display: Graphical LCD with keypad (English interface)
• Mounting: Drawout design (rack-mounted)
• Operating Temperature: -25°C to +70°C
• Certifications: CE, UL, CSA, IEC 60255

Key Features

1. Comprehensive Motor Protection
   • Standard protection suite: overcurrent, undercurrent, ground fault, overload, locked rotor, phase imbalance, undervoltage, overvoltage, and overtemperature protection.
   • Advanced thermal modeling tracks motor winding temperature using current and RTD inputs, preventing premature insulation failure.
2. Flexible I/O & Configuration
   • 10 programmable contact inputs for monitoring external devices (e.g., circuit breakers, limit switches).
   • 7 output relays (2 Form A, 5 Form C) for tripping, alarming, and control functions.
   • Easily configurable via EnerVista Setup Software or front-panel keypad, with customizable protection curves and logic.
3. Reliable Communication
   • Front USB port for local configuration, firmware updates, and data logging.
   • Rear RS-485 port supports Modbus RTU protocol for integration into SCADA and DCS systems, enabling remote monitoring and control.
4. Robust Industrial Design
   • Drawout construction allows quick removal and replacement without disrupting wiring, reducing maintenance downtime.
   • Rugged metal enclosure with EMI shielding ensures resistance to electrical noise, vibration, and harsh environmental conditions.
   • Wide operating temperature range (-25°C to +70°C) suits both indoor and outdoor industrial installations.
5. Advanced Monitoring & Diagnostics
   • Real-time monitoring of current, voltage, power, frequency, and motor temperature via LCD display or remote communication.
   • Event logging records up to 1000 events (faults, alarms, status changes) with timestamps for post-fault analysis.
   • LED indicators for power, run, trip, alarm, and communication status provide at-a-glance system health.

Application Scenarios

• Manufacturing & Process Industries
  • Oil & Gas: Protects motors driving pumps, compressors, fans, and conveyors in refineries, pipelines, and offshore platforms.
  • Chemical & Petrochemical: Ensures safe operation of motors in reactors, mixers, and material handling systems.
  • Water & Wastewater: Used for pump and blower motor protection in treatment plants and distribution networks.
• Power Generation
  • Thermal Power Plants: Protects auxiliary motors (e.g., boiler feed pumps, induced draft fans, coal conveyors).
  • Renewable Energy: Applied in hydroelectric and biomass power facilities for motor-driven equipment protection.
• Infrastructure & Heavy Industry
  • Mining & Metals: Protects motors in crushers, mills, conveyors, and hoists in mining and steel plants.
  • Cement & Building Materials: Used for fan, kiln, and crusher motor protection in cement factories.