Description
Overview
The GE D25 is a multifunctional Intelligent Electronic Device (IED) and substation automation controller. It consolidates multiple roles—including PLC, RTU, data concentrator, bay controller, and power quality monitor—into a single, modular unit. Designed for both new installations and retrofit projects, the D25 enables streamlined substation monitoring, control, and automation with a single platform. Its rugged design ensures reliable operation under harsh electrical environments.
Applications
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Substation automation and control for utilities and industrial power systems.
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Monitoring and management of legacy relays and third-party devices.
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Data acquisition, fault recording, power quality analysis, and local HMI operation.
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Software-based automation schemes via LogicLinx® soft logic.
Technical Specifications
| Attribute | Details |
|---|---|
| Model | GE D25 (Multilin™ D25) |
| Manufacturer | GE Vernova (GE Grid Solutions) |
| Device Type | Substation Automation Controller / Intelligent Electronic Device (IED) |
| Processor | 32-bit RISC |
| Memory | 64 MB DRAM, 32 MB Flash |
| Operating System | QNX real-time OS |
| Digital Inputs | Up to 128 |
| Digital Outputs | Up to 64 |
| Analog Inputs | Up to 32 |
| Analog Outputs | Up to 16 |
| Communication Ports | Ethernet, serial, modem, fiber optic |
| Protocols Supported | Over 110, including DNP3, IEC 61850, Modbus, TCP/IP |
| Functions | PLC, RTU, LAN node, IED gateway, bay controller, metering, power quality monitoring, fault/event recording |
| Form Factor | Rack-mounted, modular design |
| Environment | Industrial-grade, suitable for substation conditions |
| Local HMI | Optional Data Display Panel or Graphical Display Panel (GDP) touchscreen |
| Power Quality Monitoring | Harmonics, RMS trends, voltage sags/swells/interruption |
| Fault Recording | Digital fault record transfer via LAN or email |
| Metering | 1-, 2-, 2½-, 3-element metering for 3-wire and 4-wire buses (revenue class, non-certified) |
Key Features
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Combines PLC, RTU, gateway, metering, and monitoring into one modular device.
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Supports a wide range of communication protocols for full interoperability.
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Modular and scalable design adapts to substations of any size.
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Local HMI with touch screen option enables operator control and dynamic visualization.
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LogicLinx® soft logic supports software-based automation without hardwiring.
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Event and digital fault recording ensures accurate diagnostics and relay verification.
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Measures total harmonic distortion, harmonic spectrum, RMS, voltage sag/swells, and interruptions.
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Integrates with legacy and third-party devices, simplifying retrofits.
Considerations / FAQ
Q: Is the D25 still in production?
A: Manufacturing for the D25 has been discontinued. Alternative models include:
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For bay control: C30 or C60
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For gateway applications: G100
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For RTU: G100 combined with D20.IO or C30/C60
Q: Can the D25 function as a protective relay?
A: The D25 is designed for automation, monitoring, and control, not for direct protective relay functions.
Q: How does the local HMI function?
A: The GDP option allows touch screen operation, dynamic display of alarms, and full local control, while the Data Display Panel provides basic status readouts.
Q: How is power quality monitored?
A: The D25 records harmonics (DC–21st), RMS trends, sags, swells, and interruptions, providing detailed data for diagnostics and energy quality analysis.
Q: Can it replace multiple devices?
A: Yes, it consolidates PLC, RTU, bay controller, gateway, metering, and monitoring into one unit, reducing wiring, footprint, and maintenance costs.
Features
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