Intuitive transformer protection

The Multiline™ 345 is a member of the Multilin 3 series of protective relay platforms designed for the protection, control and management of power transformers as primary or standby protection.

The Multiline™ 345 provides advanced transformer protection, control and monitoring in an economical withdrawable or non-withdrawable design.

The 345 contains a full range of independent protection and control elements as well as advanced communications, metering, monitoring and diagnostics.

Key Benefits

-Safe, high-speed protection with improved energisation suppression

-Field-proven algorithms and reliable protection against unintentional tripping or inadequate protection

-Integrated transformer thermal monitoring for asset management maintenance optimisation

-Earth current monitoring sensitive earth fault protection for detecting 5% of earth fault windings

-Temperature monitoring via remote RTDs using RMIO modules supporting up to 12 RTDs

Easy to use and flexible with one-step setup, universal CT inputs and assignable CT inputs

-Flexible communications with multiple ports and www.cniacs.com protocols for seamless integration

-Strong security and hierarchical password control for centralised management

Pull-out design simplifies testing, commissioning and maintenance for increased process uptime

-Application flexibility with programmable logic elements

-Switchgear diagnostics and simple troubleshooting output test modes via trip/close circuit monitoring and LEDs and digits

-Environmental monitoring system for monitoring operating conditions and planning preventive maintenance

-Rugged design that exceeds industry standards with automotive-grade components and advanced test procedures such as accelerated life cycle testing

-Available in pull-out or non-withdraw-out options

-Simplifies migration of legacy MII Series relays to Series 3 platforms

-Intuitive configuration software and user-friendly logic configuration tools