GE Vernova D25 Multilin D25 Substation Automation Controller IED

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

• Substation automation and control for utilities and industrial power systems.

• Monitoring and management of legacy relays and third-party devices.

• Data acquisition, fault recording, power quality analysis, and local HMI operation.

• Software-based automation schemes via LogicLinx® soft logic.

Technical Specifications

Key Features

• Combines PLC, RTU, gateway, metering, and monitoring into one modular device.

• Supports a wide range of communication protocols for full interoperability.

• Modular and scalable design adapts to substations of any size.

• Local HMI with touch screen option enables operator control and dynamic visualization.

• LogicLinx® soft logic supports software-based automation without hardwiring.

• Event and digital fault recording ensures accurate diagnostics and relay verification.

• Measures total harmonic distortion, harmonic spectrum, RMS, voltage sag/swells, and interruptions.

• 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:

• For bay control: C30 or C60

• For gateway applications: G100

• 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.