Motor Protection

Multilin 869

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The 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. Learn more

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

Multilin 869 motor protection relay functional block diagram

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