GE Multilin 750-P5-G5-S5-HI-AI-R-E Feeder Protection Relay – 750 Series Analog I/O Module
When a feeder protection relay fails mid-operation, the consequences cascade instantly: uncontrolled fault currents surge through distribution lines, circuit breakers trip without coordination, and entire production lines go dark. In substations and industrial power distribution systems, the absence of a reliable, spec-matched relay like the GE Multilin 750-P5-G5-S5-HI-AI-R-E is not a minor inconvenience — it is a safety hazard and a costly operational shutdown. Every hour of downtime in a manufacturing facility or utility substation can cost tens of thousands of dollars. This is precisely why sourcing an exact-match, fully tested replacement matters.
The GE Multilin 750-P5-G5-S5-HI-AI-R-E is a fully configured variant of the industry-renowned GE Multilin 750 Series Feeder Protection Relay. Within the 750 Series lineup, this configuration stands out for its comprehensive I/O complement: high-current analog inputs (HI-AI), relay output contacts (R), dual communication ports including RS-485 Modbus (G5) and Ethernet (E), and a full operator display panel (S5) — all powered by a universal 110–240V AC/DC supply (P5). This makes it one of the most versatile and field-deployable variants in the 750 Series, widely adopted across utility feeders, industrial motor control centers, and renewable energy switchgear globally.
Technical Specifications
- Model / Part Number: 750-P5-G5-S5-HI-AI-R-E
- Series: GE Multilin 750 Series Feeder Protection Relay
- Manufacturer: GE Multilin (General Electric Grid Solutions)
- Power Supply (P5): 110–240V AC/DC universal input
- Communication Port 1 (G5): RS-485, Modbus RTU / DNP3.0
- Display / HMI (S5): Full alphanumeric LCD display with LED indicators and front-panel keypad
- Current Input Type (HI): High-current analog input module
- Analog Input Module (AI): Analog measurement inputs for voltage, current, and power metering
- Output Type (R): Relay contact outputs (Form A/C)
- Ethernet Port (E): 10/100 Base-T Ethernet, IEC 61850 GOOSE / Modbus TCP
- Protection Functions: 50/51, 50N/51N, 67/67N, 27/59, 81, 46, 49, 79 (per IEC/ANSI)
- Metering: True RMS current, voltage, power, energy, power factor, frequency
- Mounting: 19-inch rack / panel flush mount
- Operating Temperature: -20°C to +60°C
- Standards Compliance: IEC 60255, IEEE C37.90, CE, UL
Key Features & Benefits
- Dual Communication Architecture: Simultaneous RS-485 Modbus and Ethernet (IEC 61850) connectivity enables seamless integration into both legacy SCADA systems and modern digital substations.
- High-Current Analog Inputs: The HI-AI module provides accurate metering even under high-load or fault conditions, critical for precise protection coordination.
- Universal Power Supply: P5 supply accepts 110–240V AC/DC, eliminating the need for auxiliary power converters in mixed-voltage substations.
- Comprehensive Protection Suite: Covers overcurrent, directional, earth fault, voltage, frequency, and thermal protection in a single compact unit.
- Front-Panel Operator Interface: S5 display with LED targets and keypad allows on-site commissioning, settings review, and fault record retrieval without a laptop.
- IEC 61850 GOOSE Messaging: Enables peer-to-peer protection schemes and fast bus protection without hardwired intertripping.
- Oscillographic Fault Records: Captures pre- and post-fault waveforms for detailed post-event analysis and relay coordination studies.
Industry & Equipment Applications
- Utility Distribution Feeders: Primary and backup protection for 11kV–33kV overhead and cable feeders.
- Industrial Power Distribution: Motor control centers, transformer feeders, and bus section protection in petrochemical, mining, and manufacturing plants.
- Renewable Energy: Wind farm collector feeders, solar PV string protection, and grid interconnection switchgear.
- Data Centers & Critical Infrastructure: Feeder protection for medium-voltage switchgear in mission-critical facilities.
- Water & Wastewater Treatment: Pump station feeder protection with remote SCADA integration via Modbus/DNP3.
- Rail & Transit: Traction power substation feeder protection with IEC 61850 integration.
System Integration & Compatible Parts
The 750-P5-G5-S5-HI-AI-R-E is designed to operate within GE Multilin’s broader protection and control ecosystem. Compatible and commonly paired components include:
- GE Multilin 750 Series variants (750-P5-G5-S5-HI-R-E, 750-P5-G5-S5-HI-AI-R) for redundant protection schemes
- GE Multilin 850 Series Universal Relay for upstream bus protection coordination
- GE EnerVista 750 Setup Software for configuration, settings upload/download, and oscillographic record retrieval
- GE Multilin SR750 communication cables and RS-485 converters
- Compatible SCADA systems via Modbus RTU, DNP3.0, and IEC 61850 protocols
Our Quality Assurance Process
At Konmask.com, every GE Multilin 750-P5-G5-S5-HI-AI-R-E unit undergoes a rigorous multi-stage inspection before shipment:
- Visual Inspection: Enclosure integrity, terminal block condition, label verification, and connector seating check.
- Functional Power-On Test: Unit is energized to verify display operation, LED functionality, and self-diagnostic pass.
- Communication Port Verification: RS-485 and Ethernet ports tested for connectivity and protocol response.
- Firmware Version Check: Firmware version recorded and disclosed to buyer prior to shipment.
- Anti-Static Packaging: Units are packed in ESD-safe bags with foam cushioning and double-boxed for international freight.
How to Order
- Submit your inquiry via the Contact / Request a Quote form on this page.
- Provide your required quantity, delivery timeline, and destination country.
- Our technical team will confirm stock availability, firmware version, and lead time within 24 hours.
- Receive a formal proforma invoice with DHL / FedEx / UPS freight options.
- Payment via T/T (bank transfer) or other agreed terms; shipment with full tracking provided.
Why Choose Konmask.com?
- Industrial Automation Specialists: We focus exclusively on PLC modules, DCS components, and protection relays — not general electronics.
- Verified Stock: All units are physically inspected and tested before listing.
- Global Shipping: We ship to 80+ countries with DHL Express, FedEx International Priority, and UPS Worldwide.
- Technical Support: Our engineers can assist with compatibility verification, firmware questions, and installation guidance.
- Fast Response: Inquiries answered within 24 business hours; urgent requests prioritized.
- Competitive Pricing: Direct sourcing relationships enable us to offer market-competitive pricing on genuine parts.
Frequently Asked Questions
- Q: Is the 750-P5-G5-S5-HI-AI-R-E a new or refurbished unit?
- A: We stock both new-in-box and professionally refurbished units. The condition will be clearly stated in your quotation. All refurbished units pass our full QA process.
- Q: What firmware version does the unit ship with?
- A: Firmware version varies by stock batch. We will disclose the exact firmware version before order confirmation. EnerVista software supports field firmware upgrades.
- Q: Can I use this relay with my existing Modbus SCADA system?
- A: Yes. The G5 communication option provides RS-485 with Modbus RTU and DNP3.0 support, fully compatible with standard SCADA and DCS platforms.
- Q: What is the lead time for international orders?
- A: In-stock units typically ship within 2–3 business days. DHL Express delivery to most destinations takes 3–7 business days after dispatch.
- Q: Do you provide a warranty?
- A: Yes. We offer a 90-day warranty on all units covering functional defects. Extended warranty options are available upon request.
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Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
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