GE Multilin 889-E-P1-P1-G1-L-S-S-A-N-N-G-A-P-T-B-3A-S-N-B-NProduct Description
This model is the GE Vernova Multilin 889 comprehensive protection and control device for generators. It is part of the 8 series high-end relay protection platform, with a complete long-order code, built-in differential protection, backup protection, generator condition monitoring, programmable logic, multi-channel temperature measurement, dual redundant communication, used for the complete protection and control of generator sets and generator-transformer units; the long suffix represents the complete customized configuration of hardware specifications, power supply, I/O boards, communication, enclosure, and software language, with the original factory standard new product delivery lead time being long, with discontinued / scarce versions having circulation inventory, dismantled spare parts as the main source.
Full order code breakdown 889-E-P1-P1-G1-L-S-S-A-N-N-G-A-P-T-B-3A-S-N-B-N
889: Model, generator-specific protection relay
E: Operating interface language English
P1: J slot current board 1A three-phase current + voltage acquisition
P1: K slot current board 1A three-phase current + voltage acquisition
G1: Grounding current acquisition module (single-channel grounding CT)
L: Power supply 24–48VDC direct current power supply
S: B slot I/O board 6 RTD thermal resistance temperature measurement (Pt100)
S: C slot I/O board 6 RTD thermal resistance temperature measurement (Pt100)
A: F slot high-voltage I/O: 2 voltage monitoring outputs, 3 C-type relays, 7 switch quantity inputs
N: G slot no expansion card
N: H slot no expansion card
M: Main communication 1: dual Ethernet electrical ports
M: Second communication: dual Ethernet electrical ports
P: Terminal connection method Backplane standard terminals
TB: With built-in terminal base kit
SE: Security enhanced firmware (IEC62443 network security)
N: Arc flash detection module
N: No additional sensor interface
B: Standard panel display
4: Hardware firmware version Rev.4
Key technical parameters
Protection functions: Generator differential 87G, generator-transformer unit overall differential 87O, loss of excitation, overvoltage / undervoltage, overfrequency / underfrequency, reverse power, negative sequence, grounding fault, thermal overload protection
Current acquisition: Two independent three-phase CT inputs, rated 1A secondary current
Temperature measurement channels: 12 independent RTD Pt100 temperature acquisition (stator / bearing temperature measurement)
Switching circuit: 7 DI digital inputs, multiple Form A/Form C passive relay outputs
Power supply: 24–48VDC wide-range DC power supply
Communication interface: Dual redundant Ethernet (dual network ports), supports IEC61850 Ed2, PRP redundancy, Modbus TCP, DNP3
Safety certification: IEC61508 SIL2, IEC62443 network security, UL, CE
Sampling speed: Sub-cycle rapid differential protection, fault clearance in milliseconds
Operating temperature: -20℃ ~ +60℃, control cabinet IP20 installation
Human-machine interface: Local LCD panel, key operation, fault recording, event recording
Storage: Fault recording, thousands of SOE time sequence event records
Product performance
Integrated protection for all scenarios of generators, covering small distributed units to large thermal power / gas power generator sets complete protection logic;
Two independent current acquisition boards, supporting dual CT redundant measurement, improving the reliability of unit operation;
12 channels bearing and stator temperature monitoring, integrated thermal aging prediction model, achieving preventive maintenance;
Dual Ethernet redundant communication, zero interruption network transmission, compatible with DCS/SCADA remote monitoring; Programmable logic CFC, customizable interlock, sequential control, and shutdown logic, suitable for on-site customized processes;
Secure firmware SE version, firewall, access permission classification, meeting power station security protection standards;
Complete fault recording, SOE event sequence, facilitating fault traceability analysis, reducing downtime troubleshooting time.
Application fields
Coal-fired power, gas turbine combined cycle power generation units, generator – step-up transformer – generator sets protection cabinets
Hydropower, biomass, photovoltaic supporting synchronous power generation units protection measurement control
Steel mills, refining and chemical self-owned power plants, distributed energy stations generator safety protection systems
Public utility grid grid-connected units, industrial emergency backup power generation units monitoring protection
Similar order models in the same series 889
889-E-P5-P5-G5-H-N-N-A-N-N-M-M-S-F-B-4: 5A CT current version, without RTD temperature measurement board
889-E-P1-P1-G1-L-S-S-A-N-N-M-M-P-TB-SE-N-N-B-3: Firmware Rev.3 old version, cannot be directly replaced by Rev.4
889-E-P1-P1-G1-H-N-N-A-N-N-M-M-P-TB-N-N-B-4: AC 110/220V power supply, without SE safety firmware
889-E-P1-P1-G1-L-N-N-A-N-N-M-M-P-TB-SE-N-N-B-4: Without RTD temperature measurement expansion board
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