Product Details
Product Description
The GE Multilin SR750 Feeder Management Relay is a multifunctional protection and control device designed for electrical feeder applications in industrial and utility systems. The SR750 offers flexible configuration options for current inputs, power supply ranges, and analog outputs, making it adaptable to diverse installation requirements.
This relay provides comprehensive overcurrent, voltage, frequency, and directional protection functions, ensuring reliable feeder operation and system stability.
Technical Specifications
-
Manufacturer: GE Multilin
-
Model Options: SR750 or SR760
-
Phase Current Inputs: 1 A or 5 A CT secondaries
-
Ground Current Inputs: 1 A or 5 A
-
Sensitive Ground Current Inputs: 1 A or 5 A
-
Control Power (LO Range):
-
DC: 20–60 V
-
AC: 20–48 V @ 48–62 Hz
-
Control Power (HI Range):
-
DC: 88–300 V
-
AC: 70–265 V @ 48–62 Hz
-
Analog Outputs: Configurable (0–1 mA, 0–5 mA, 0–10 mA, 4–20 mA)
-
Breaker Closed LED: Red or Green option
Protection Functions
-
Phase timed overcurrent (51P) with voltage restraint (12 curves + 2 Flexcurves)
-
Ground timed overcurrent (51N)
-
Phase & ground low-set overcurrent (50PL, 50NL)
-
Phase & ground high-set overcurrent (50PH, 50NH)
-
Directional phase and ground control
-
Zero sequence protection (67P)
-
Negative sequence instantaneous (46/50) and time overcurrent (46/51)
-
Voltage phase reversal (47)
-
Negative sequence overvoltage (59Q)
-
Under/overvoltage (27-1, 27-2, 59-1, 59-2)
-
Under/overfrequency (81U-1, 81U-2, 81O-1, 81O-2)
Key Features
-
Flexible input/output configuration for varied system requirements
-
Wide-range power supply compatibility
-
Advanced feeder protection with directional and sequence elements
-
Designed for industrial-grade reliability
Application Scenarios
-
Industrial feeder protection and monitoring
-
Utility distribution systems requiring advanced relay functions
-
Integration into SCADA and energy management platforms
FAQ
Q: Can the SR750 be configured for different CT ratings?
A: Yes, it supports both 1 A and 5 A CT secondaries.
Q: What power supply ranges are available?
A: LO range (20–60 VDC, 20–48 VAC) and HI range (88–300 VDC, 70–265 VAC).
Q: Does the SR750 provide frequency protection?
A: Yes, it includes both underfrequency and overfrequency elements.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
FAT vs SAT in Industrial Control Systems: Key Differences and Execution Guide
Industrial control system deployment relies on strict verification protocols to guarantee operational safety, system stability, and regulatory compliance. Commissioning complex Programmable Logic Controller (PLC) racks, Distributed Control Systems (DCS), and Safety Instrumented Systems (SIS) requires two critical milestones: the Factory Acceptance Test (FAT) and the Site Acceptance Test (SAT). Both procedures validate that system automation meets design specifications, but they occur at different stages of project execution and target distinct operational risks.
Hub vs Switch vs Router in Industrial Automation Architecture
Modern factory automation relies on reliable industrial networking infrastructure to exchange real-time field data across operational technology systems. Engineers often encounter networking hardware like hubs, switches, and routers when integrating Programmable Logic Controllers, Distributed Control Systems, and SCADA monitoring nodes. Although these devices share physical ports, they operate at different layers of the Open Systems Interconnection reference model and deliver distinct traffic management capabilities.
Marshalling Cabinet Preventive Maintenance: Essential Healthiness Checks for PLC, DCS, and ESD Systems
Marshalling cabinets serve as the vital interface between field instrumentation and control room electronics in modern process facilities. Regular preventive maintenance of these cabinets ensures signal integrity across programmable logic controllers (PLCs), distributed control systems (DCS), and emergency shutdown (ESD) networks. System technicians must execute structured inspection protocols to mitigate environmental risks, identify loose wiring, and maintain continuous operational readiness.