GE SR750-P5-G1-S1-HI-A20-R Feeder Protection
Product Overview
The GE 350-007650-83H C is a specialized terminal interface printed circuit board engineered for use within General Electric’s Speedtronic™Mark V turbine control system,one of the most widely deployed industrial automation platforms in global power generation.This subassembly functions as a critical signal routing and field-wiring interface,typically mounted inside I/O pack enclosures to connect external sensors—such as thermocouples,RTDs,or millivolt transducers—to the main analog input processing cards like the DS200TCQAG1A.By providing a robust,electrically isolated pathway from plant floor instrumentation into the controller’s sensitive electronics,the GE 350-007650-83H C ensures accurate temperature monitoring essential for turbine protection,efficiency optimization,and regulatory compliance.
Designed for integration into high-availability environments,the GE 350-007650-83H C features screw-terminal blocks for secure field connections,transient suppression components,and precision signal conditioning traces.The“C”suffix confirms the presence of conformal coating—a vital enhancement that shields the board from moisture,dust,salt spray,and chemical contaminants commonly found in fossil fuel plants,hydro stations,and offshore oil&gas facilities.Though not a standalone field-replaceable unit,this module plays an indispensable role in maintaining signal integrity across decades-long operational lifespans,making it a cornerstone of legacy system sustainability and brownfield modernization efforts worldwide.
Technical Specifications
Parameter Name Parameter Value
Product Model 350-007650-83H C
Manufacturer General Electric(GE Power/GE Vernova)
Product Type Terminal Interface Subassembly/Signal Routing PCB
Compatible System Speedtronic Mark V Turbine Control Platform
Primary Application Thermocouple&low-level analog sensor interfacing
Terminal Type Screw-clamp terminals(typically 3.5–5.0 mm pitch)
Conformal Coating Yes(urethane or acrylic,per MIL-I-46058C)
Electrical Isolation Basic insulation;reinforced by system-level design
Operating Temperature-20°C to+70°C
Mounting Method Panel-mounted within I/O pack chassis(e.g.,20H9995G01)
Dimensions Approx.150 mm×100 mm×15 mm(varies by revision)
Associated Main Board DS200TCQAG1A,DS200AIDA,or similar Mark V analog I/O cards
Main Features and Advantages
Signal fidelity and long-term reliability define the value proposition of the GE 350-007650-83H C.Unlike generic terminal strips,this board is engineered as an integral part of GE’s closed-loop control architecture,with trace impedance,grounding topology,and component placement optimized for microvolt-level thermocouple signals.Its layout minimizes thermal EMF errors and electromagnetic interference—critical when measuring exhaust gas or bearing temperatures where±1°C accuracy can influence trip decisions.
The conformal coating on the GE 350-007650-83H C significantly extends service life in humid or corrosive environments,preventing dendritic growth and leakage currents that could otherwise cause false alarms or drift.Additionally,the board often incorporates fuse holders or current-limiting resistors on select channels,adding a layer of overcurrent protection for both field wiring and the downstream I/O card.This design philosophy aligns with GE’s emphasis on fail-safe operation in safety-critical turbine applications.
Another key advantage is mechanical robustness.The GE 350-007650-83H C uses high-retention terminal blocks rated for repeated wire insertion/removal without loosening—essential during maintenance outages.Its edge connector or ribbon cable interface ensures secure mating with the main I/O processor,reducing intermittent faults caused by vibration.For plants managing aging infrastructure,this subassembly enables cost-effective repairs without replacing entire I/O packs,preserving capital while maintaining OEM-grade performance.
Application Field
The GE 350-007650-83H C is predominantly deployed in thermal power generation facilities where precise temperature monitoring directly impacts turbine safety and efficiency.In coal-and gas-fired plants,it interfaces with exhaust thermocouples on heavy-duty Frame 7/9 turbines,feeding real-time data to the Mark V controller for combustion tuning and overtemperature protection.Similarly,in combined-cycle configurations,the GE 350-007650-83H C supports heat recovery steam generator(HRSG)tube wall monitoring,preventing catastrophic failures during rapid ramping.
Beyond conventional power,the GE 350-007650-83H C is also found in hydroelectric stations,where it connects stator winding RTDs to monitor generator health during load swings.In industrial settings such as refineries and petrochemical complexes,it enables reliable temperature feedback from compressors and steam turbines integrated with GE control systems.Even in marine propulsion applications aboard LNG carriers,this terminal board ensures stable sensor connectivity despite constant vibration and salt-laden air.
Its enduring relevance stems from the global installed base of Mark V systems—many operating since the 1990s—where the GE 350-007650-83H C serves as a linchpin for sustaining operational continuity during component obsolescence challenges.As plants extend asset life through life-cycle management programs,this subassembly remains a trusted solution for maintaining signal chain integrity without full system replacement.
Related Products
DS200TCQAG1A:Primary thermocouple input processing board that mates with 350-007650-83H C
DS200AIDAG1A:Analog input board for 4–20 mA/0–10 V signals,may use similar terminal subassemblies
20H9995G01:Standard Mark V I/O pack chassis housing the 350-007650-83H C and main I/O cards
350-007650-83G:Alternate revision with minor terminal layout or grounding differences
DS200SDCCG1A:Servo control card often co-located in same I/O rack
Mark V CPR:Central processor module coordinating all I/O,including data from 350-007650-83H C-linked sensors
IS200TREGH1A:Later-generation terminal board used in Mark VIe for similar functions
GEH-6196:Official Mark V I/O manual referencing 350-007650-83H C wiring diagrams
Installation and Maintenance
Pre-installation preparation:Before installing the GE 350-007650-83H C,verify compatibility with your specific I/O pack configuration and main board revision—mismatched terminal layouts can cause wiring errors or short circuits.Ensure the I/O chassis is de-energized and follow proper lockout/tagout(LOTO)procedures.Inspect the board for physical damage,lifted traces,or degraded conformal coating,especially if sourced as surplus.Confirm that terminal block screws are fully seated and that the edge connector pins are straight and free of oxidation.Use only stranded,shielded thermocouple extension wire with proper polarity when connecting field sensors.
Maintenance recommendations:During routine outages,inspect the GE 350-007650-83H C for signs of overheating,corrosion,or loose terminals—common failure points in high-vibration zones.Retorque terminal screws to manufacturer specifications to prevent intermittent opens.If temperature readings drift or show noise,isolate the issue by testing continuity from the field sensor through the GE 350-007650-83H C to the main I/O card.Store spare units in anti-static,humidity-controlled packaging to preserve coating integrity and prevent PCB delamination.Never attempt to clean with aggressive solvents that may dissolve the conformal layer.
Product Guarantee
Every GE 350-007650-83H C we supply undergoes rigorous visual and functional inspection to ensure it meets original GE manufacturing standards,including verification of conformal coating coverage and terminal block integrity.We guarantee that each unit is either new surplus from verified inventory or professionally refurbished using OEM-grade materials and processes.Backed by a 24-month warranty against defects in workmanship and materials,our GE 350-007650-83H C modules are tested for dimensional accuracy,pin alignment,and compatibility with standard Mark V I/O packs.Our team of certified GE automation engineers provides lifetime technical support to assist with integration,troubleshooting,and lifecycle planning—ensuring your legacy control system remains reliable,compliant,and operational for years to come.Product Overview
The GE SR750-P5-G1-S1-HI-A20-Ris an advanced feeder management relay manufactured by General Electric as part of its Multilin SR series protection system.This sophisticated protective device provides comprehensive protection,monitoring,and control functions for electrical feeders in industrial and utility power systems.Designed with advanced digital signal processing and comprehensive communication capabilities,the GE SR750-P5-G1-S1-HI-A20-Roffers reliable protection against various electrical faults while providing detailed system information for operational decision-making.The relay’s modular design and flexible configuration make it suitable for a wide range of applications from simple distribution feeders to complex industrial power systems.
Engineered for maximum reliability and performance,the GE SR750-P5-G1-S1-HI-A20-Rincorporates multiple protection elements including overcurrent,earth fault,and voltage protection functions that can be customized to meet specific application requirements.The relay’s high-accuracy measurement capabilities provide precise monitoring of electrical parameters,while its advanced communication protocols enable seamless integration into modern automation systems.The GE SR750-P5-G1-S1-HI-A20-Rfeatures a robust construction with wide operating temperature range and high immunity to electrical noise,ensuring dependable operation in challenging industrial environments.With its comprehensive event recording and oscillographic capture capabilities,the relay facilitates thorough analysis of system events and supports preventive maintenance strategies.
Technical Specifications
Product Model|GE SR750-P5-G1-S1-HI-A20-R
Manufacturer|General Electric(GE)
Product Type|Feeder Management Relay
Rated Current|5A(with 1A option available)
Input Voltage|120/240V AC or 125/250V DC
Frequency Range|45-65Hz(50/60Hz nominal)
Protection Functions|Overcurrent,Earth Fault,Voltage,Frequency
Communication|Ethernet,RS485,Fiber optic
Protocols|Modbus TCP,DNP3,IEC 61850
Display|LCD with intuitive interface
Control Inputs|8 programmable inputs
Output Relays|6 form-C relays
Operating Temperature|-40°C to+70°C
Storage Temperature|-40°C to+85°C
Enclosure|IP54 rated for harsh environments
Mounting|Panel or DIN rail
Dimensions|Standard 19″rack mount
Certifications|UL,cULus,CE,IEC
Main Features and Advantages
Advanced Protection Capabilities:The GE SR750-P5-G1-S1-HI-A20-Rdelivers comprehensive protection through its sophisticated algorithms that include definite time,inverse time,and instantaneous overcurrent protection elements.The relay’s sensitive earth fault protection detects low-level ground faults,while voltage and frequency protection elements safeguard against system abnormalities.The GE SR750-P5-G1-S1-HI-A20-R’s flexible setting groups allow adaptation to changing system conditions,and its advanced logic programming enables custom protection schemes tailored to specific application requirements.
Enhanced Monitoring and Control:Featuring high-accuracy metering capabilities,the GE SR750-P5-G1-S1-HI-A20-Rprovides precise measurement of current,voltage,power,energy,and power quality parameters.The relay’s comprehensive data logging captures trends and events,while its oscillographic recording captures detailed waveform data during faults.The GE SR750-P5-G1-S1-HI-A20-Roffers extensive control functionality through its programmable inputs and outputs,supporting automation sequences and remote control operations.The intuitive LCD interface and navigation keys provide local access to measurements,settings,and recorded data.
Robust Communication and Integration:Supporting multiple communication protocols including IEC 61850,the GE SR750-P5-G1-S1-HI-A20-Renables seamless integration into modern digital substations and industrial networks.The relay’s dual Ethernet ports provide redundant communication paths,while support for legacy protocols ensures compatibility with existing systems.The GE SR750-P5-G1-S1-HI-A20-R’s web-enabled interface allows remote access for configuration,monitoring,and maintenance,reducing the need for onsite visits and improving operational efficiency.
Application Field
The GE SR750-P5-G1-S1-HI-A20-Rfinds extensive application in electrical distribution systems across various industries.In utility substations,the relay protects distribution feeders,providing fault detection and isolation to maintain system reliability.The GE SR750-P5-G1-S1-HI-A20-R’s advanced protection functions ensure selective coordination with downstream devices,minimizing the impact of faults on system operation.In industrial facilities,the relay protects critical feeders supplying manufacturing processes,with its robust design withstands the challenging electrical environments containing variable frequency drives and non-linear loads.
In commercial and institutional facilities,the GE SR750-P5-G1-S1-HI-A20-Rprovides protection for main incoming feeders and distribution circuits,with its power quality monitoring capabilities helping to maintain service quality for sensitive equipment.The relay also serves in renewable energy applications,protecting interconnection feeders and supporting grid code compliance.The GE SR750-P5-G1-S1-HI-A20-R’s flexible configuration makes it suitable for various system voltages and configurations,from simple radial systems to complex network arrangements.
Related Products
GE Multilin 750series-Feeder protection family
GE Multilin 869-Motor protection relay
GE Multilin 650-Transformer protection relay
GE UR series-Universal protection relays
GE F650-Digital protection and control
GE QuickPanel-Human-machine interface
Installation and Maintenance
Pre-installation preparation:Before installing the GE SR750-P5-G1-S1-HI-A20-R,verify that the application requirements match the relay’s capabilities.Ensure proper CT and VT ratios are selected and that wiring meets specifications.Prepare appropriate configuration tools and software for commissioning,and verify that the mounting arrangement provides adequate clearance for ventilation and access.
Maintenance recommendations:Regular maintenance includes verification of protection settings and functional testing.Periodically download event records and review relay operation.Keep firmware updated and perform routine calibration checks to maintain accuracy.Monitor relay diagnostics and trending data to identify potential issues before they affect system operation.
Product Guarantee
We guarantee that all GE SR750-P5-G1-S1-HI-A20-Rfeeder management relays are genuine GE products manufactured to original specifications.Our quality assurance process includes comprehensive testing to verify protection performance and communication functionality.We provide complete technical support for configuration,installation,and troubleshooting,backed by our team of protection specialists with extensive experience in power system applications.
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