GE Multilin 889-E-P1-P1-G1-H-S-S-A-L-A-MM-P-F-B-SE-N-N-B-4-043X relay

GE Multilin 889-E-P1-P1-G1-H-S-S-A-L-A-MM-P-F-B-SE-N-N-B-4-043X
I. Product Basic Information
Brand: GE Vernova (formerly GE Multilin)
Product Name: 889 Generator Integrated Protection and Control Device (Generator Differential Protection Relay)
Application: Main protection and backup protection for medium and small-sized generators and generator-transformer units; integrates measurement, control, fault recording, event logging, and remote communication functions. Widely used in power plants, captive power stations, and industrial waste heat power generation projects.

 Complete Model Order Code Breakdown
889 Product Series
8 Series high-end generator-specific protection device supporting high-speed differential protection, FlexLogic programmable logic, and IEC61850 network communication

E: Operating Interface Language
E = English (English-language panel)

P1: J Slot – First Set of CT Current Input
P1: 1A Three-phase current input with associated voltage circuit (1A class current transformer)

P1: K Slot – Second Set of CT Current Input
Dual-winding configuration, same 1A three-phase current + voltage acquisition, used for dual-ended generator differential protection

G1: Grounding Current Input
G1: 1A zero-sequence grounding current acquisition; one grounding CT channel per current group

H: Power Supply
H = 110–250V DC / 88–265V AC universal wide-range AC/DC power supply

S-S: B, C Slots – I/O Board Configuration
Dual standard digital input/output boards, standard passive contacts, programmable trip/alarm contacts

A: RTD Temperature Measurement Configuration
A = Supports up to 13 RTD platinum resistance temperature measurements for generator stator/rotor windings, used for winding overheating protection

L: Installation Structure
L = Plug-in withdrawable cabinet design, enabling maintenance and replacement without power interruption

A: Environmental Selection
Wide-temperature industrial grade, standard cabinet indoor installation, no special anti-corrosion or explosion-proof requirements

MM: Dual Communication Ports
Dual redundant Ethernet communication, supports IEC61850, Modbus TCP, DNP3, IEC104 protocols, and PRP redundant networking

P: F Slot Analog Output
4–20mA analog output transmitter, capable of uploading telemetry data such as current, voltage, and power to DCS systems

F: Advanced Protection Function Package
Includes full suite of protection algorithms such as generator loss-of-field, reverse power, negative-sequence overcurrent, over-excitation, frequency anomaly, and generator-transformer unit total differential protection 87O

B: Hardware Safety Option
Equipped with hardware interlocks to prevent misoperation and arc-fault-related hardware configurations

SE: Firmware Version
SE = Standard commercial firmware version, compatible with EnerVista software for configuration and

commissioning

N-N: Two Customization Options
N = No additional custom features, no arc-flash protection, no Wi-Fi option

B: Factory Packaging Specification
Standard industrial anti-static original factory packaging

4: Terminal Block Type
4 = Standard screw-type high-current terminal block

043X: Firmware Program Version Number
Built-in firmware version V043X, used for program compatibility and functional patch identification by GE Grid Solutions

Key Technical Specifications
Protection Core Functions
Generator ratio-restrained differential, phase-to-phase overcurrent, zero-sequence ground protection, loss-of-field protection, reverse power protection, overvoltage/undervoltage, overfrequency/underfrequency, negative-sequence overload, thermal overload, rotor grounding protection, etc.

Analog Acquisition
Two sets of three-phase 1A current inputs, two sets of three-phase voltage inputs, one 1A ground current input, up to 13 RTD temperature inputs, four 4–20mA analog inputs, seven analog outputs

Digital Inputs/Outputs 14 digital input channels, 10 programmable relay outputs (trip, alarm, position signals)
Communication: Dual 100 Mbps Ethernet, RS485 serial port, supporting IEC61850 Ed2.0, Modbus, DNP3, and 103/104 telecontrol protocols
Installation: 19-inch standard rack-mount plug-in type