An invaluable tool for any integration solution using SEL Relays

SUBNET SEL Relay Data Emulator™ is a SUBNET software application that emulates the data communications of SEL relays. SUBNET SEL Relay Data Emulator assists you in configuring substation systems without having direct access to devices. Accessing live relay data isn’t always possible when configuring a new system, and when it is available, there is potential to disrupt systems. Bench testing systems using actual relays can be expensive, time-consuming and disruptive.

SUBNET SEL Relay Data Emulator Software can automatically learn a SEL relay’s communication capabilities. SUBNET SELRDE Software can then be directly substituted for the physical SEL relay to safely and reliably commission relay communications. Effortlessly change target and meter data through SUBNET SELRDE Software without the inconvenience or risk of physically jumpering contacts or using expensive and often unavailable test sets to directly inject voltage/current. Furthermore, breaker and remote bits can be safely operated without the concern of an inadvertent mis-operation.

SUBNET SEL Relay Data Emulator Application

SUBNET SEL Relay Data Emulator is a versatile software tool that is used by a variety of people including:



Integrators will appreciate having a whole host of virtual SEL relays at their fingertips. Integrators use SUBNET SEL Relay Data Emulator to bench-test systems and troubleshoot communication networks before performing the live installations.

For a fraction of what it would cost to house a family of SEL relays, instant access to simulated SEL relay data is as close as your laptop.


Training developers and instructors at every level will be thrilled to simulate SEL relay data. Whether you train people to use substation software applications, or you’re a utility bringing new staff up to speed, SUBNET SEL Relay Data Emulator provides realistic relay data that can be manipulated and collected. Now you can bring all your simulated relay data into any classroom, anywhere.

Engineers and Technicians

Commissioning substations, configuration testing, validation and firmware testing just became a whole lot easier. SUBNET SEL Relay Data Emulator automatically mirrors your actual SEL relays. Once configured, engineers and technicians can test firmware upgrades on remote terminals units (RTUs), configure human machine interface (HMI) applications, test master/slave communications, troubleshoot network connections and more.


The configuration wizard imports connected device information in a matter of minutes. Once imported, you can disconnect from the device, and all of the imported data points will be displayed in the main window. Once you turn the emulation on, you can perform actions with the points, such as changing analog unit’s magnitude and phase, changing values from true to false, or even simulating terminal commands or fault reports. These changes can then be viewed in an HMI or master device, just as if the data was being produced by a real connected relay.