GE / Alstom Multilin 869 Motor Protection System

The GE Alstom Multilin 869 relay is a member of the Multilin 8 Series protective relay platform and has been designed for the protection, control and management of medium and large induction and synchronous motors.The 869 is equipped with an integrated synchronous motor protection module for protection and control of synchronous motors.

The Multilin 869 provides advanced functionality for various types of applications such as high-speed protection, extensively customizable programmable logic, advanced motor monitoring and diagnostics, and flexible configuration capabilities. Advanced communications of the 8 Series platform allows easy integration into process and electrical control systems for smoother asset monitoring and control. To simplify the migration and upgrade from an existing SR 469 protection relays, retrofit kits have been developed which significantly simplify the upgrade process.

Advanced Motor Monitoring & Diagnostics
The Multilin 869 offers an integrated, cost effective Monitoring and Diagnostics features that leveraging existing relay data without the need for additional devices, sensors, wiring or training.
? Motor failures and faults can have a significant impact on a process, resulting in loss of revenue and material. Predictive maintenance and situational awareness to the motors operating condition can help reduce unplanned downtime and energy consumption – maximizing motor output and life.
? Motor monitoring & diagnostic features include stator turn to turn fault, broken rotor bar detection, roller bearing faults, foundation looseness, eccentricity, and misalignments. Using advanced Motor Current Signature Analysis (MCSA), the 869 continuously analyzes the motor current signature and based on preset algorithms will determine when an electrical, thermal or mechanical fault / failure condition exists in the motor.

The Multilin 869 Motor Protection System is a protection device designed for the management, protection and control of medium to large horsepower motors. The 869 provides comprehensive protection and control of various types of motors with different loads they run.
With a fast protection pass, running every 1/8th of a cycle, the 869 relay provides faster current, voltage, power and frequency protection elements ; helping reduce stress on assets. The Multilin 869 supports the latest standard communication protocols, including IEC 62439/PRP and IEC 61850 Ed2 ; facilitating easy integration into new or existing SCADA/DCS networks.

GE Alstom Multilin 869 relay Key Benefits
? Comprehensive motor protection for medium and large induction and synchronous motors
? User-configurable Single Line Drawing on color display for local control, system status, and metering
? Advanced motor diagnostics with comprehensive fault and disturbance recording
? Integrated arc flash detection using light sensors supervised by overcurrent to reduce incident energy and equipment damage
? Advanced cyber security including features such as AAA, Radius, RBAC, and Syslog helps enable NERC? CIP requirements
? Draw-out design simplifies testing and increases process uptime
? Supports the latest in communication protocols and networking technology, enabling seamless system integration and interoperability
? Optional Wi-Fi connectivity minimizes system configuration and facilitates safe relay programming and diagnostic retrieval

Applications
? Wide range of motor applications for oil & gas, mining & metals, cement, and wastewater
? Comprehensive protection and management of medium to large motors; two-speed, VFD-driven, cyclic loading and synchronous motors
? Specific and advanced features for high inertia loads and reduced-voltage starting motors
? Stator and rotor protection of medium to large synchronous motors
? Synchronous motor DC field excitation application control
? Advanced predictive motor diagnostics and motor health visualization

We offer GE?s century long tradition of power system innovation. From generators to transmission lines, to motors and beyond, we ensure dependable, safe power worldwide. GE offers a wide range of single function and auxiliary relays, along with a portfolio of accessories, to support high performing and reliable protection and control systems. To explore the GE portfolio with us click here GE numerical Relays !