IRI1-ER Earth Fault Relay

Product detail

Product code:
Request a quote Select options below to request a price.

Product Information

Download Area

Available options

Documentation (Brochures & Manuals)

General HighTECH Line User Manual

The stabilized earth fault current relay IRI1-ER serves as a supplement for the transformer differential protection.

It allows for example implementation of a zero-current differential protection by integrating the star-point current (IRI1-ER).

With the view to its higher resistance to disturbances from outside the protection area, it can be set much more sensitively than the simple transformer differential protection, in order to prevent false trippings.

The IRI1-ER can be used as:

  • Zero-current differential protection of the star point winding (restricted earth fault) of a transformer (IRI1-ER).

Benefits and Key Features

  • 19“ racks – fully withdrawable

  • Door mounting – withdrawable and sealable

  • Panel mounting – fully withdrawable

  • Intuitive HMI

  • Easy setting software – Smart view

  • Compact form factor


  • Protection of power transformers (HV, MW, LV) against internal phase and ground faults as well as external faults.

Inputs and Outputs
Current transformer inputs 1
Output relays 1
Protection ANSI
Earth fault protection 50N/51N
Differential protection: Restricted earth fault 87N
Mounting Type
Housing is withdrawable
Housing suitable for door mounting
Housing suitable for mounting plate

© 2022 SEG ELECTRONICS GMBH | All rights reserved
webstránky | webdesign | eshopy |
Website uses cookies
We use cookies to ensure that we give you the best experience on our website. If you continue to use this site we will assume that you are happy with it. Learn More