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GE Multiline™ 345 3 Series Protective Relays

From:GE | author:Mr.Chen | Time :2024-07-31 | 406 view: | Share:

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 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

Applications

-Primary or standby protection for two-winding power transformers

-Protection of reactors and autotransformers

-Protection of distribution transformers of all sizes and voltage classes

-Applications requiring fast and secure communication

-Corrosion and humidity protection for harsh environments

Protection and control

Dual-slope unrestricted differential protection with unique double breakpoints for differentiated

-Second harmonic surge and fifth harmonic overexcitation suppression

-Thermal overload and restricted earth fault (RGF/87g)

-Integrated overcurrent element

-Circuit breaker fault and lockout function metering and monitoring

-Integrated metering

-Event recorder: 256 events (1ms time stamp)

-Programmable oscilloscope, up to 32 samples per cycle, digital status and fault reports

-Relay health diagnostics and circuit breaker monitoring

-Security and password control

-SNTP or IRIG-B time synchronised communication

Pre-USB and post-serial, copper and fibre optic Ethernet ports

-Multiple communication protocols including IEC 61850. IEC 61850 GOOSE, Modbus® TCP/IP, Modbus RTU, DNP 3.0. IEC 60870-5-104. IEC 60870-5-103

EnerVista™ software - simplifies setup and configuration

-Powerful document management system

-Full-featured monitoring and data logging

-Maintenance and troubleshooting tools

-Seamless integration toolkit

-Setup MII Series conversion tools to Series 3

OVERVIEW    

The 345 is a microprocessor-based system for primary or standby protection of power transformers with two windings.

The 345 also provides a very cost-effective differential solution for distribution transformers as well as primary substation protection for standby transformers.

The 345 offers advanced automatic algorithms for amplitude and phase compensation for more than twenty two-winding transformers, and fast and safe bias differential double slope double breakpoint protection.

Features

The 345 is equipped to detect restricted earth fault elements with earth faults down to 5% of the transformer's windings, basic thermal protection and a complete set of phase, earth, neutral and negative sequential overcurrent protection.

Two identical groups with protected elements are designed to meet these applications where a change in settings is required.

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