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Multilin 889
Comprehensive Protection and Management for Small to Large Sized Generators

The Multilin 889 relay, a member of the Multilin 8 Series protective relay platform, has been designed for the protection, control, monitoring and management generators and in-zone transformers used in both industrial and utilities applications.

The Multilin 889 provides advanced, high-speed protection, extensively customizable programmable logic, and flexible configuration capabilities, to maximize the operational performance and life of critical generators.

Equipped with the latest in advanced communications, the Multilin 8 Series supports IEC 61850 Edition 2 ensuring simplified device integration and dual communication ports with IEC 62439/PRP, enabling users to achieve zero latency in communications for high reliability network architectures, ensuring complete asset monitoring and control.

Key Benefits
  • Enhanced generator protection functions
  • Dedicated generator monitoring and control functions
  • Advanced generator diagnosis, comprehensive asset monitoring, diagnostics, reporting and high-end fault and disturbance recording, simplifies pre- and post-fault analysis
Advanced Generator Protection
  • Advanced differential protection for both generator and in-zone transformer
  • Industry standard cyber security tools such as AAA, Radius, RBAC and Syslog enabling NERC/CIP requirements
  • Low insertion force, draw-out design simplifying testing, commissioning, and maintenance for increased process uptime
  • Optional Wi-Fi connectivity minimizes system configuration and facilitates remote relay programming and diagnostic retrieval
  • Industry leading Enervista setup software with integrated graphical logic editor and logic monitor tools to simplify device testing and commissioning

Platform Overview

The Multilin 8 Series platform delivers the highest level of quality, reliability and performance with…
Innovative Technology & Design
  • Elimination of electrolytic capacitors
  • Advanced diagnostics with unique algorithms ensuring asset protection is never compromised
  • Single set-up and configuration across the platform
  • Built-in field swappable power supply
  • Enhanced relay draw-out construction
  • Advanced and flexible communication offerings simplifying system integration
  • Embedded communications offerings including: IEC61850 Ed2, IEC62439/PRP, Modbus RTU & TCP/IP
Exceptional Quality & Reliability
  • IPC A-610-E Class 3 Manufacturing standards – highest industry standards for electronic manufacturing
  • 100% Environmental Stress Screening and full functional testing
  • Rated for IP54 applications
Uncompromising Service & Support
  • Covered under GE’s 10 year warranty plan
  • Fully designed, tested and assembled at GE facilities
Multilin 889 Overview

The Multilin 889 utilizes advanced functionality enabling high-speed protection and control, simplified device setup and configuration through single-screen device configuration enabling faster start-up and commissioning, as well as detailed fault analysis simplifying identification of potential generator issues before they become critical failures.

  • Primary and back-up protection and management of small, medium and large generators
  • Suitable for co-generation applications in industrial and utility applications
  • Asset management with data analysis, trending and reporting
8 Series
8 Series
Protection & Control

As part of the Multilin 8 Series platform, the Multilin 889 provides superior, high-speed protection and control. With proven protection algorithms, the 889 provides a full range of selectively enabled protection and control elements, protecting both the generator and the in-zone transformer (differential protection).

Generator Stator Differential Protection

The 889 utilizes high-speed dual slope differential protection for detecting and clearing of stator phase faults. Advanced CT saturation detection algorithms maintain immunity to saturation conditions that may be caused due to external disturbances through the use of a directional check that provides additional supervision and ensures the fault is internal to the generator before triggering it to trip.

Overall Generator & Transformer Differential Protection

The 889 can provide overall generator and transformer differential protection (87O). It covers the protection zones from the generator neutral to the GSU (Generator Step-Up) transformer’s High Voltage (HV) winding. This additional protection element provides backup to both Generator Stator Differential (87G) and a dedicated transformer differential in a transformer relay (i.e.: Multilin 845 Transformer Protection System). The 889 with this Generator-Transformer Differential protection supports transformer setup, provides enhanced protection security by including both restrained and unrestrained (instantaneous) differential protection.

100% Stator Ground

100% stator ground fault protection is provided through an overvoltage element and an adaptive voltage differential feature responding to the unbalance of the third harmonic at the machine terminals and at the neutral point. The 889 compares the machine neutral voltage and ground current to determine if ground directional faults are within or outside the generator.

Integrated Arc Flash Protection

The Multilin 8 Series supports an integrated arc flash module providing constant monitoring of an arc flash condition within the switchgear, motor control control centers, or panelboards. With a 2ms protection pass, the 8 Series is able to detect light and overcurrent using 4 arc sensors connected to the 8 Series relay. In situations where an arc flash/fault does occur, the relay is able to quickly identify the fault and issue a trip command to the associated breaker thereby reducing the total incident energy and minimizing resulting equipment damage.

Self-monitoring and diagnostics of the sensors ensures the health of the sensors as well as the full length fiber cables. LEDs on the front panel display of the 845 can be configured to indicate the health of the sensors and its connections to the relay.

845 integrated arc flash protection
Fast, reliable arc flash protection with light-based arc flash sensors integrated within the Multilin 8 Series of protection & control devices. With arc flash detection in as fast as 2msec, the costs associated with equipment damage and unplanned downtime is significantly reduced.

The 889 provides advanced communications technologies for remote data and engineering access, making it easy and flexible to use and integrate into new and existing infrastructures. Direct support for fiber optic Ethernet provides high-bandwidth communications, allowing for low-latency controls and high-speed file transfers of relay fault and event record information. The 889 also supports two independent IP addresses, providing high flexibility for the most challenging of communication networks.

Providing several Ethernet and serial port options, dual independent Ethernet Ports, and support for a wide range of industry standard protocols, the 889 enables easy, direct integration into DCS and SCADA systems. The 889 supports the following protocols:

  • IEC 61850 Ed2, IEC 62439 / PRP
  • DNP 3.0, IEC 60870-5-103, IEC 60870-5-104
  • Modbus RTU, Modbus TCP/IP

The 889 has two interfaces as USB front port and Wi-Fi for ease of access to the relay. Wi-Fi Connectivity:

  • Simplify set-up and configuration
  • Simplify diagnostic retrieval
  • Eliminate personnel in front of switchgear
  • WPA-2 security
8 Series
Ease Of Use

Software & Configuration

The EnerVista™ suite is an industry-leading set of software programs that simplifies every aspect of using the Multilin 889.

EnerVista provides all the tools to monitor the status of the protected asset, maintain the device and integrate the information measured by the Multilin 8 Series, into SCADA or DCS process control systems. The ability to easily view sequence of events is an integral part of the setup software, as postmortem event analysis is critical to proper system management.

EnerVista Launchpad

The setup tools within Launchpad allow for the configuration of devices in real-time, by communicating via serial, Ethernet or modem connections, or offline by creating device setting files to be sent to devices at a later time.

8 Series Setup Software

8 Series Setup Software is single setup and configuration tool across the platform and can reduce device setup and configuration time.

Simplified Setup & On-Going Maintenance

8 Series