Description
The GE Multilin 339 is an advanced, compact motor protection relay engineered for the comprehensive protection, control, and monitoring of low and medium-voltage induction motors. Below are the key technical parameters for model 339-L-P5-G5-H-E-S-P-1E-D-N:
🔹 Dimensions: 183 mm x 215 mm x 240 mm (standard panel-mount enclosure)
🔹 Weight: 3.5 kg (approximate net weight)
🔹 Country of Origin: United States / Canada (Manufactured under GE Multilin standards)
🔹 Power Supply: 24 – 48 VDC or 110 – 240 VAC/VDC control power options
🔹 Communication Ports: Dual RJ45 Ethernet ports supporting Modbus TCP/IP, DNP3, and IEC 61850
🔹 Digital Inputs/Outputs: Configurable DI/DO channels for trip, alarm, and control interlocking
🔹 Operating Temperature: -40°C to +60°C operational range
🔹 System Frequency: 50 Hz and 60 Hz selectable nominal frequency
🔹 Display Type: Graphical LCD screen with an integrated keypad for local operation and data viewing
🔹 Core Protection Functions: Thermal overload, current unbalance, phase reversal, earth fault, and locked rotor protection
📖 Product Operating Instructions
🔧 Step 1: Mechanical Mounting Securely mount the relay onto the switchgear panel cutout following the exact cutout dimensions to ensure proper structural stability and environmental sealing.
🔌 Step 2: Electrical Wiring Connect the control power supply, current transformers (CTs), and input/output control wiring strictly according to the terminal assignment diagram located on the side label of the device. Ensure all terminal connections are torqued properly.
💻 Step 3: Configuration & Commissioning Power up the unit and use either the front-panel keypad or the EnerVista 339 Setup software via the front USB port or rear Ethernet port to input motor nameplate details, thermal limits, and protection setpoints.
🟢 Step 4: Monitoring & Maintenance Regularly inspect the front LCD interface for active warnings, event logs, and real-time operational metrics such as current draw and thermal capacity during routine maintenance checks.
❓ Frequently Asked Questions (Q&A)
💬 Q1: How can a thermal overload trip be reset on the 339 relay? 💡 A1: Once the motor has cooled down sufficiently and the thermal model value drops below the preset reset threshold, the trip can be cleared via the front panel reset button, a programmed digital input, or remotely through communication software.
💬 Q2: Does this model support advanced substation automation protocols? 💡 A2: Yes, the 339 motor protection system supports modern communication protocols including IEC 61850, allowing effortless integration into automated control systems.
✨ Recommended Related GE Multilin Series and Models
📌 GE Multilin 469 (Motor Protection System)
📌 GE Multilin 350 (Compact Motor Protection Relay)
📌 GE Multilin 750 / 760 (Feeder Management Relay)
📌 GE Multilin SR745 (Transformer Protection Relay)
📌 GE Multilin F650 (Feeder Protection System)
📌 GE Multilin M60 (Advanced Motor Protection System)
📌 GE Multilin G60 (Generator Protection System)
📌 GE Multilin T60 (Transformer Protection System)
📌 GE Multilin B30 (Busbar Protection System)
📌 GE Multilin UR Series (Universal Relay Platform)
