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Product details:

Technical Specifications of GE Multilin Protection Devices (English Introduction)

GE Multilin, a leading provider of power system protection and control solutions, offers a comprehensive range of protection devices designed for critical applications in generation, transmission, and distribution systems. Below are the key technical parameters and features of selected GE Multilin protection devices:

1. GE Multilin  Generator Protection System

• Purpose: Comprehensive protection for synchronous generators driven by steam, gas, or hydro turbines.
• Key Features:
  • Protection Functions: Differential protection, overcurrent, overvoltage/undervoltage, frequency protection, reverse power, loss of excitation, and stator/rotor earth fault detection.
  • Measurement Capabilities: Current, voltage, power, energy, and frequency monitoring with 64 samples per cycle for high-precision waveform recording.
  • Event Recording: Stores up to 1,024 time-stamped events with 0.5 ms resolution.
  • Communication: Supports Modbus RTU/TCP-IP, DNP3, and IEC 61850 via RS-232/RS-485 or Ethernet.
  • Configuration: Programmable via EnerVista LaunchPad software with FlexLogic™, FlexCurves™, and FlexElements™ for customizable protection logic.
  • Hardware: Modular design with CPU (9E, 9G, 9H, etc.) and CT/VT (8F, 8G, 8H, etc.) modules, ensuring compatibility and scalability.

2. GE Multilin  Bay Controller

• Purpose: Advanced protection and control for feeders, buses, transformers, and motors in industrial and utility applications.
• Key Features:
  • Voltage/Current Inputs: Supports 110–250 V DC or 120–230 V AC (auto-ranging) with 32 programmable digital inputs and 16 digital outputs.
  • Protection Functions: Phase-to-phase, ground, and zero-sequence overcurrent; overvoltage/undervoltage; frequency protection; and recloser logic.
  • Precision: ±0.1% full-scale accuracy for analog inputs (4–20 mA or 0–10 V).
  • Communication: 10/100 Base-T Ethernet (TCP-IP, Modbus, DNP3, IEC 61850), RS-232/RS-485 (Modbus RTU), and optional fiber-optic interfaces.
  • Time Synchronization: IRIG-B, PTP (IEEE 1588), and SNTP with ±1 ms accuracy.
  • Environmental: Operating temperature -20°C to +70°C, IP20 rating (expandable to higher levels).
  • Certifications: CE, UL, cUL, and compliance with IEC 61850, IEEE C37.90, and IEEE C37.118.

3. GE Multilin Digital Feeder Protection Relay

• Purpose: Protection for medium-voltage distribution feeders in power plants, substations, and industrial systems.
• Key Features:
  • Voltage/Current Inputs: Supports 110–250 V DC or 110–230 V AC with programmable overcurrent (51P/51G) and thermal modeling (49) for motor/transformer protection.
  • Recloser Logic: Programmable single/multiple reclosing with configurable delays and attempts.
  • Breaker Failure Detection: Triggers backup protection upon breaker failure.
  • Communication: Modbus, DNP3 via RS-232/RS-485 or Ethernet (optional).
  • Event Recording: Fault recording and Sequence of Events (SOE) with high-speed sampling.
  • Environmental: Operating temperature -25°C to +70°C, IP20 rating (expandable).

4. GE Multilin  Voltage & Frequency Relay

• Purpose: Monitoring and protection for voltage and frequency deviations in power systems.
• Key Features:
  • Voltage/Frequency Monitoring: Real-time tracking of parameters with adjustable thresholds for alarm/trip actions.
  • Voltage Ratings: Supports multiple voltage levels (e.g., 690 V, 4,160 V).
  • Reliability: High-precision measurements and robust design for critical applications.

5. GE Multilin  Motor Management Relay

• Purpose: Comprehensive motor protection, control, and monitoring.
• Key Features:
  • Thermal Modeling: Accurate rotor and stator thermal models to optimize motor operation within thermal limits.
  • Display/Interface: 48-character alphanumeric LCD, 5 LEDs (Trip, Alarm, Aux1, Aux2, Service), and a keyboard for local configuration.
  • RTD Sensor Options: 10 Ω copper (10C), 100 Ω platinum (100P), or 120 Ω nickel (120N) for temperature monitoring.
  • Withdrawable Design: Enables maintenance without shutting down the motor.

Global Support and Compliance

• GE Multilin devices are backed by a global network of 200+ authorized agents, ensuring technical support, application engineering, and sales assistance.
• All products comply with international standards (e.g., IEC, IEEE) and undergo rigorous testing for reliability and safety.

For detailed specifications, refer to GE’s official documentation or contact GE Multilin technical support.

Note: Parameters may vary by model and configuration. Always verify with the latest product datasheets.

This overview highlights GE Multilin’s commitment to innovation, reliability, and flexibility in power system protection.

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