Description

Not for real photos. All pictures are for reference only.

Product Overview

The MULTILIN 239 is a compact digital protection relay dedicated to three‑phase AC motors and driven mechanical loads. It separates motor starting and running thermal modeling to avoid nuisance tripping during acceleration while delivering reliable protection against locked rotor, phase imbalance, short circuit, ground fault, and undercurrent events. Integrated thermistor and optional RTD monitoring tracks stator and bearing temperatures to catch overheating before permanent winding damage occurs. With local keypad programming, fault event recording, and Modbus RTU connectivity, it simplifies commissioning, troubleshooting, and SCADA integration for pumps, fans, compressors and process motors across industrial and utility power systems.

Technical Specifications

• Brand: MULTILIN (GE Multilin)
• Model: 239
• Warranty: One Year
• Condition: 100% New & Original
• Input/Output: CT inputs (1 A / 5 A secondary); thermistor input; optional 3 RTD channels; trip, alarm, auxiliary and service relay outputs; optional 4–20 mA analog output
• Operating Temp: 0°C to +60°C
• Communication: RS485 two‑wire, Modbus RTU, up to 19200 baud
• Control Power: 70–265 V AC / 90–300 V DC universal supply; low‑voltage variant available
• Protection Functions: Thermal overload, locked rotor, ground fault, phase short circuit, current unbalance, undercurrent, stall protection, start limiting
• Housing: Panel mount, NEMA 12 front enclosure
• Logging: Stores last five trip records with fault values
• Display: Vacuum fluorescent display + front keypad, status LED indicators