GE Multilin 489-P1-LO-A20-E

The GE Multilin 489-P1-LO-A20-E is a motor management relay designed for comprehensive protection, control, and monitoring of motors and generators in industrial applications. Below is a detailed technical parameter breakdown:

1. Electrical Specifications

• Input Current (CT Secondaries):
  • 1A phase current transformer (CT) secondary rating, supporting standard 5A CTs via external transformation if needed.
• Control Power Supply:
  • DC Input: 20–60 VDC
  • AC Input: 20–48 VAC at 48–62 Hz
  • Power Consumption: Typically ≤15 VA (AC) or ≤10 W (DC) under full load.
• Output Relays:
  • Multiple programmable output relays with contact ratings of 5 A @ 250 VAC/30 VDC (resistive load).

2. Display and User Interface

• Enhanced Display:
  • High-resolution, backlit LCD with intuitive menu-driven navigation.
  • Supports real-time monitoring of electrical parameters, alarm status, and event logs.
• Front-Panel Controls:
  • Navigation keys, LED indicators for status/alarm conditions, and a keypad for parameter entry.

3. Protection Functions

• Motor Protection:
  • Overload (thermal overload protection using I²T curves).
  • Phase unbalance, phase loss, and reverse-phase sequence detection.
  • Under/overvoltage, under/overfrequency, and voltage unbalance protection.
  • Stall protection (detects locked-rotor conditions).
• Earth Fault/Ground Fault:
  • Sensitive ground fault detection with adjustable pickup and time delays.
• Thermal Monitoring:
  • Support for RTD inputs (e.g., Pt100) for motor winding and bearing temperature monitoring.

4. Communication and Connectivity

• Serial Communication:
  • RS-232/RS-485 ports supporting Modbus RTU, DNP3, or IEC 60870-5-103 protocols.
• Ethernet (Optional):
  • Supports Modbus TCP/IP, DNP3 over TCP, and IEC 61850 for integration with SCADA/DCS systems.
• HMI/SCADA Integration:
  • Data exchange via standard protocols for remote monitoring and control.

5. Environmental and Mechanical Specifications

• Enclosure Rating:
  • IP30 (NEMA 1) enclosure for indoor use.
• Operating Temperature:
  • -20°C to +60°C (storage: -40°C to +85°C).
• Humidity:
  • 5% to 95% non-condensing.
• Dimensions (Approx.):
  • 144 mm (H) × 216 mm (W) × 127 mm (D) [DIN rail or panel mount].
• Weight:
  • ~1.5 kg.

6. Compliance and Certifications

• Standards:
  • Compliant with IEC 60255, IEEE C37.90, UL 508, and CE/EN 61010-1.
• EMC Immunity:
  • Meets IEC 61000-4-x standards for electromagnetic compatibility.

7. Additional Features

• Event Logging:
  • Stores up to 100+ fault events with timestamps for post-mortem analysis.
• Programmable Logic:
  • Customizable logic blocks for interlocking and automation.
• Firmware Upgradeability:
  • Field-upgradeable firmware via USB or communication ports.

Applications

• Industrial motor control centers (MCCs).
• Pump, fan, and compressor drives.
• Generator protection in small power plants.
• Critical infrastructure (water treatment, HVAC, etc.).

Summary

The GE Multilin 489-P1-LO-A20-E is a versatile motor management relay offering robust protection, advanced diagnostics, and seamless integration with industrial automation systems. Its wide power supply range, flexible communication options, and compliance with global standards make it suitable for demanding industrial environments.

For detailed configuration or customization, refer to the GE Multilin 489 Series User Manual or contact GE Renewable Energy Grid Solutions technical support.