The GE 750-P5-G5-S5-HI-A1-R-E operates as a microprocessor-based feeder management relay for power distribution networks. This intelligent device provides complete protection, metering, and control for incoming and outgoing feeders. It consequently safeguards equipment while delivering detailed operational data to system operators.
Physical Characteristics
Engineers designed this relay in a rugged metal enclosure suitable for switchgear mounting. The unit measures approximately 22 centimeters in height, 18 centimeters in width, and 20 centimeters in depth. Its total weight reaches roughly 3.2 kilograms, reflecting robust internal construction. The front panel includes a backlit LCD display and navigation keypad.
Technical Specifications
| Parameter | Specification |
|---|---|
| Dimensions | 22 cm (H) x 18 cm (W) x 20 cm (D) |
| Weight | 3.2 kg |
| Enclosure | Metal, panel-mount with bezel |
| Display | Backlit LCD, 4 lines x 20 characters |
| Control Power | 120-240 VAC/VDC, 25 VA |
| Current Inputs | 5 A nominal, 100 A continuous |
| Voltage Inputs | 600 VAC maximum direct |
| Frequency | 50/60 Hz auto-sensing |
| Protection Elements | 50/51, 50N/51N, 46, 27, 59, 81 |
| Output Relays | 5 form-C programmable |
| Input Contacts | 5 opto-isolated |
| Communication | RS485 Modbus RTU |
| Optional Fiber | HI = High-speed fiber port |
| Event Recorder | 256 time-stamped events |
| Operating Temp | -20°C to +60°C |
Model Configuration Breakdown
The 750-P5-G5-S5-HI-A1-R-E designation specifies a precise set of features. P5 indicates the base unit with 5 A current inputs. G5 adds enhanced metering with harmonics and demand recording. S5 provides the advanced communications processor. HI includes the high-speed fiber optic module. A1 specifies one analog output. R-E indicates rear terminals and English manuals.
Protection and Metering Functions
This relay incorporates comprehensive overcurrent protection with definite-time and inverse-time characteristics. Phase and ground elements coordinate with downstream devices for selective tripping. The GE 750 continuously measures voltage, current, power, and energy on the protected feeder. Harmonic analysis up to the 15th order helps diagnose power quality issues.
Input and Output Configuration
Five programmable output relays allow flexible tripping and alarm scheme implementation. Each output can map to any combination of protection elements. Five digital inputs accept status signals from external devices like switch positions. This flexibility enables complete integration with existing protection schemes.
Communication Capabilities
The 750-P5-G5-S5-HI-A1-R-E includes RS485 Modbus RTU as standard for SCADA integration. The HI option adds a high-speed fiber optic port for critical applications. You can access all metering values and event records through the communication interface. The relay supports multiple masters for redundant SCADA connections.
Event Recording
Internal memory stores up to 256 time-stamped events with detailed descriptions of each occurrence. Oscillography captures waveform data for fault analysis purposes. You can retrieve these records locally or remotely via communications. This data proves invaluable for post-fault analysis and system optimization.
Details
| Weight | 0.1 kg |
|---|---|
| Dimensions | 25 × 108 × 127 mm |
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