Brand: ABB
Category: Other
Document Type: Manual
Language: EN
Manual for REF601
Uploaded: April 20, 2026, 7:53 p.m.
Manual Publish Date: 2012-03-27
Warranty Information
Refer to warranty terms for specific coverage details.
The REF601 is a dedicated feeder protection relay designed for the protection and control of utility substations and industrial power systems. It uses Rogowski coil sensors for current measurement and offers pre-configured functionality for easy commissioning. The relay provides protection, control, measurement, and condition monitoring. It features three-stage phase segregated overcurrent protection and two-stage earth-fault protection, along with a transformer inrush detector. The device offers local HMI control, measurement of phase and earth currents, and stores sequence-of-events information. It also records fault data for post-fault analysis. The REF601 includes self-supervision and a built-in test mode.
Troubleshooting and error codes
| Description | Value |
|---|---|
| Relay fault | For a permanent relay fault, the protection functions will be blocked to prevent incorrect operation. Details can be found in the system logs. |
| Trip circuit fault | Indicated via LED and event log. Monitor trip circuit availability and operability. Detects open-circuit and loss of control voltage. |
| Protection start/trip indication | LED indications for Ready/IRF, Protection start, protection trip, Phase fault, and Earth fault trip. |