Description

The 750-P5-G5-S5-HI-A20-R-E is a high-performance, microprocessor-based feeder management relay from the GE Grid Solutions 750/760 series. This unit is engineered to provide comprehensive primary and backup protection for critical power infrastructure, including buses, transformers, and transmission lines. By utilizing a dual-processor architecture, the relay ensures high-speed signal processing and reliable fault detection, serving as a central control hub for utility and heavy industrial power distribution systems.

Features

• Dual-processor architecture featuring a 32-bit Motorola 68332 for protection algorithms and a 16-bit Intel 80C186 for communication and auxiliary I/O management.
• Eight programmable 4-20 mA analog outputs for flexible system integration and monitoring.
• Comprehensive current sensing inputs (5 A) covering phase, zero-sequence, and sensitive ground fault detection.
• Enhanced LCD display and dedicated LED status indicators, including a "Breaker Closed" visual confirmation.
• Wide-range power supply compatibility supporting both high-voltage AC and DC inputs.

Applications

This relay is designed for demanding environments such as power plants, substations, and large-scale industrial grids where high-speed fault protection and system monitoring are required to minimize downtime and protect expensive electrical assets.

Technical Specifications

Installation Guidelines

• Ensure the unit is mounted in a standard 19-inch rack (4U height) with adequate clearance for ventilation.
• Verify that all current and voltage inputs are correctly wired according to the terminal diagram provided in the product manual.
• Use shielded cables for communication and analog output signals to minimize EMI interference.
• Ensure the chassis is properly grounded to the cabinet earth bus to maintain protection integrity.
• Always disconnect power before inserting or removing the relay from the rack to prevent electrical damage or unexpected operation.

FAQ

What is the primary function of the 750-P5-G5-S5-HI-A20-R-E?

This relay provides primary and backup protection for feeders, transformers, and busbars, utilizing advanced protection logic to detect faults and trigger necessary control actions.

Does this unit support remote communication?

Yes, the relay is designed with communication capabilities managed by the internal 16-bit processor, allowing for integration into broader SCADA or plant control systems.

What is the operating temperature range?

The unit is rated for operation in environments ranging from -40 to 60 deg C, making it suitable for harsh industrial conditions.