GE SR750-P5-G5-S5-HI-A20-R Multi-Channel Industrial Safety Relay

Description

Real-World Use & Application Scenarios
Where is this product used and why?
The SR750-P5-G5-S5-HI-A20-R is used in feeder protection schemes across industrial facilities and distribution networks, where robust protection, accurate metering, and flexible communication are essential. In large facilities, it protects feeders feeding critical motors, transformers, and bus sections, helping minimize outage impact and improve fault analysis. Utilities and industrial operators deploy SR750 variants to meet grid codes, enable remote monitoring, and support coordinated protection with other protection relays. The specific configuration name indicates the exact combination of inputs, outputs, and communication options chosen to match the plant’s topology, making it a common reference in procurement and engineering discussions for protective relays and feeder automation.

Product Introduction & Positioning
What it is, where it fits, and why it matters
The SR750-P5-G5-S5-HI-A20-R is a GE Multilin feeder management relay configured for high-availability feeder protection. It slots into a protection rack or switchgear housing and interfaces with CTs, VTs, motor feeders, and communication networks to implement protection schemes and metering. This model is part of GE’s modern protection portfolio, designed to deliver reliable protection, flexible configuration, and robust diagnostics. It matters because it provides a scalable, standards-aligned platform for protecting critical feeders while offering integration with GE’s remote monitoring and asset management tools.

Key Technical Features & Functional Benefits
Performance, reliability, and integration
Expect a rich feature set typical of the SR750 family: multiple relay protection algorithms, flexible metering, configurable I/O, and diverse communication options (serial and IEC 61850-capable interfaces in many variants). The HI option indicates high-impedance interlocking or high-accuracy measurements, which improves selectivity and reduces nuisance trips in complex feeder networks. The A20-R designation points to a particular accessory or regional option package that aligns with panel layouts and serviceability. Overall, the model provides fast, reliable protection with clear diagnostics, aiding maintenance planning and fault analysis while supporting scalable deployment across multiple feeders.

Installation Notes & Maintenance Best Practices
Two concise paragraphs
During installation, verify that the SR750 module’s rack location, power supply, CT/VT connections, and bus communications are correctly wired to match the feeder topology and protection scheme. Ensure proper grounding and bonding, verify communications settings, and document all configuration choices for future audits. In maintenance, run routine health checks on communication links, event logs, and protection parameters; schedule firmware updates per GE advisories, and maintain a detailed change log for setpoint adjustments and topology changes to ensure ongoing protection accuracy.