GE MULTILIN 889-E-P5-P5-B5-L-S-S-A-L-A-M-A-P-F-C-SE-N-N-B-4-1 protection and monitoring device

Product Description

GE MULTILIN 889-E-P5-P5-B5-L-S-S-A-L-A-M-A-P-F-C-SE-N-N-B-4-1 is a generator protection, control and measurement relay of Multilin 8 Series. It integrates protection, control, metering and fault recording for synchronous generators and associated unit transformers. This model adopts pluggable modular I/O and color LCD front panel. It is equipped with complete generator protection elements including high-speed stator differential, loss-of-excitation, reverse power, stator earth fault, over/under frequency, over/under voltage. It supports IEC61850 Ed2 and PRP parallel redundant network, with powerful programmable logic, fault disturbance recording, energy metering and generator health diagnosis. Draw-out design simplifies maintenance and commissioning. It is widely deployed in power plants, captive power stations and cogeneration units and complies with power system relay protection standards.

Product Parameters

• Series: Multilin 8 Series Generator Protection Relay
• Model: 889-E-P5-P5-B5-L-S-S-A-L-A-M-A-P-F-C-SE-N-N-B-4-1
• Device Type: Integrated Generator Protection & Control Relay
• Protection Functions: Stator differential 87S, generator-transformer overall differential 87O, 100% stator earth fault 64TN, loss of excitation 40, reverse power 32, over/under frequency 81, overvoltage/undervoltage 59/27, overcurrent, negative sequence overcurrent, etc.
• HMI: Color LCD display, local keypad operation
• Communication Protocols: IEC 61850 Ed2, PRP, Modbus TCP, DNP3
• Hardware Architecture: Modular pluggable I/O, Draw-out withdrawable design
• Sampling Rate: 8 samples per cycle, sub-cycle differential protection
• Recording: Fault event recording, disturbance waveform storage
• Metering: 3-phase voltage, current, active/reactive power, energy and phasor measurement
• Power Supply: Wide range AC/DC universal supply
• Mounting: Panel flush mount in switchgear
• Operating Temperature: -40℃ ~ +85℃
• Certifications: IEC, ANSI, NERC CIP cybersecurity compliance

Product Application

Applied in utility power plants, industrial captive power plants, cogeneration and renewable grid interconnection for protection of medium & small synchronous generators and generator step-up transformers. It continuously monitors generator electrical quantities and initiates fast tripping upon stator short circuit, winding earth fault, loss of excitation, reverse power, abnormal frequency or voltage to prevent severe generator damage. It supports unit synchronism, start/stop control, remote measurement & signalling. Connects to SCADA/DCS for data upload, event alarms and fault waveforms. Widely used for generator cabinet protection in thermal power, gas turbine power, biomass power stations.

Same Series Models (Multilin 8 Series Protection Relays)

889-E-P5-P5-G5-H-N-N-A-A-N-G-M-S-F-B-3-AS-N-B-N, 845 (Transformer Protection), 850 (Feeder Protection), 869 (Motor Protection), 889-E-P5-P5-G5-H-R-R-A-L-A-G-A-P-F-C-S-E-N-N-B-4-1