Description

The GE 369B1859G0021 is a high-performance motor management relay from GE’s Multilin™369 series,engineered for comprehensive protection,monitoring,and control of medium-and low-voltage three-phase motors.Combining advanced thermal modeling,real-time diagnostics,and flexible communication options,it safeguards critical assets against electrical and thermal faults while delivering actionable operational insights.

Application Scenarios

At a natural gas compression station in Texas,repeated motor burnouts on 400 HP reciprocating compressors led to costly unplanned outages.The facility replaced outdated electromechanical relays with the GE 369B1859G0021,leveraging its built-in RTD inputs to monitor stator winding temperature directly.Within weeks,the relay’s adaptive thermal model detected abnormal heating during startup due to misaligned couplings—triggering an early alarm before insulation failure occurred.Over 14 months,motor-related downtime dropped by 78%,and maintenance shifted from reactive to predictive.This case underscores how the GE 369B1859G0021 transforms motor protection from basic overcurrent tripping into intelligent asset health management.

Parameter

Main Parameters Value/Description

Product Model 369B1859G0021

Manufacturer GE Grid Solutions(formerly GE Multilin)

Product Category Multifunction Motor Protection&Management Relay

Input Configuration 3-phase current(CTs),3 RTD inputs(standard),optional voltage

Protection Functions Thermal overload,phase imbalance,stall,undercurrent,ground fault,jam,etc.

Communication Protocols Modbus RTU,Modbus TCP,DNP3,IEC 61850(optional),Ethernet

Display Backlit LCD with keypad for local configuration and monitoring

Metering Capabilities kW,kVAR,PF,kWh,V,A,Hz–full electrical parameter logging

Event Recording 128-event log with time-stamped sequence of events(SOE)

Fault Capture 8-cycle oscillography(waveform capture)pre-and post-trip

Environmental Rating Operating Temp:-40°C to+70°C;IP20 front panel

Mounting Method Flush or surface mount(483 mm×178 mm standard cutout)

Certifications UL,CSA,CE,ANSI C37.90,IEC 60255

Technical Principles and Innovative Values

Advanced Thermal Replication:The GE 369B1859G0021 uses a dual thermal model—one based on I²t heating and another on direct RTD feedback—to accurately predict winding temperature under dynamic load conditions,preventing nuisance trips while ensuring true thermal safety.

Integrated RTD Monitoring:Unlike basic relays requiring external transducers,the GE 369B1859G0021 accepts up to three RTD inputs(Pt100,Ni120,Cu10)natively,enabling direct stator or bearing temperature supervision without extra hardware.

Unified Protection&Intelligence:Beyond tripping,it delivers real-time motor efficiency metrics,start count tracking,and runtime analytics—turning protection into a performance optimization tool.

Cyber-Secure Communications:With optional IEC 61850 and encrypted Modbus TCP,the GE 369B1859G0021 integrates securely into modern digital substations and IIoT architectures,supporting remote diagnostics and firmware updates.

Application Cases and Industry Value

In a Chilean copper mine,conveyor belt motors frequently failed due to undetected phase imbalances caused by aging switchgear.After installing the GE 369B1859G0021,engineers used its imbalance alarm(set at 5%)to identify faulty contactors before they caused motor damage.The relay’s event recorder provided forensic data that justified a 2Mswitchgearupgrade—preventinganestimated1.2M in annual motor replacement costs.Similarly,at a pharmaceutical plant in Ireland,the GE 369B1859G0021’s undercurrent detection flagged a failing pump impeller during sterile water transfer,avoiding batch contamination and regulatory non-compliance.Users consistently praise its“set-and-forget reliability”and“diagnostic depth unmatched in its class.”

Related Product Combination Solutions

GE 369B1859G0011:Base model without RTD inputs—ideal for cost-sensitive applications.

GE 369B1859G0031:Enhanced version with voltage inputs for power factor correction and undervoltage protection.

GE UR Series Relays(e.g.,F650):For substation feeder protection where motor relay data must be aggregated.

GE Multilin L90:Line differential relay that pairs with GE 369B1859G0021 in critical motor feeder schemes.

ABB REF615 or Siemens 7SJ62:Competitive alternatives for cross-platform compatibility studies.

GE Enervista 369 Setup Software:Official PC tool for configuration,event analysis,and firmware management of GE 369B1859G0021.

GE C60 Controller:For integrated motor control logic when combined with GE 369B1859G0021 via Modbus.

Installation,Maintenance,and Full-Cycle Support

Installing the GE 369B1859G0021 follows standard relay practices:connect CT secondaries(5A or 1A),wire RTDs using shielded twisted pair,and link communications via RJ45 or RS485.Its intuitive menu system allows field technicians to complete commissioning in under 20 minutes using the front keypad—no laptop required for basic settings.Routine maintenance involves quarterly review of event logs and thermal usage counters via the display or SCADA.In case of internal failure,the unit supports hot-swappable replacement with configuration backup via SD card(optional).

We guarantee every GE 369B1859G0021 as 100%original,factory-tested,and backed by full traceability documentation.Units are validated for correct firmware revision,communication handshake,and protection element calibration prior to shipment.Our technical team provides free support for Enervista setup,CT ratio matching,and RTD scaling—ensuring seamless integration into your existing protection scheme.With a design life exceeding 20 years and global spare parts availability,the GE 369B1859G0021 delivers decades of dependable motor intelligence.

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