Distribution Feeder Protection

Multilin 850

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The Multilin™ 850 relay is a member of the Multilin 8 Series protective relay platform and has been designed for the management, protection and control of feeder applications. The Multilin 850 is an integrated, one box solution, used to provide comprehensive protection, control and monitoring of underground and overhead single or dual feeders in industrial and utility power networks.

The Multilin 850 is also an ideal choice for bay control applications, with features including 12 switchgear control elements, a large color graphical display that supports configurable single line diagrams, an integrated annunciator panel, and 20 user configurable virtual pushbuttons.

With support for industry leading communications protocols and technologies, the 850 provides easy integration into new or existing SCADA or DCS for enhanced situational awareness. To simplify the migration and upgrade from an existing SR 750/760 or 735 protection relays, retrofit kits have been developed which significantly simplify the upgrade process.

Comprehensive feeder protection
  • One box solution with advanced logic and configuration flexibility to provide comprehensive primary or backup protection, control and monitoring for 2 feeders or for feeders with 2 sets of voltage inputs.

  • breaker diagnostics with high-end fault and disturbance recording

  • Integrated arc flash detection using light sensors supervised by overcurrent to reduce incident energy and equipment damage.

  • High-end cyber security such as AAA, Radius, RBAC and Syslog, enabling NERC CIP requirements.

  • Draw-out design simplifies testing, commissioning and maintenance, increasing process uptime.

  • Optional Wi-Fi connectivity minimizes system configuration and provides safe relay programming and diagnostic retrieval.

  • Patented environmental monitoring, providing visibility to changes in environmental conditions that can affect relay life.