ABB 1MDU07204-YNE Overview Feeder Protection REF601

Overview

REF601 is a dedicated feeder protection relay, intended for the protection

and control of utility substations and industrial power systems. 

The relay is compatible with the Rogowski coil sensor for current measurement. 

The feeder protection relay REF601 is designed to unleash the advantages of

current sensors for protection and control in medium voltage applications.

The REF601 features compact size and ease of use. 

The features include:

Sensor input for phase current measurement

Earth current measurement internally or externally through CBCT

Three-stage overcurrent protection

Two-stage earth-fault protection

Inrush detection for stability during transformer charging

Local and remote control of circuit breaker

Trip Circuit Supervision

Lockout function

100 event logs

Two analogue fault records

Non-resettable trip counter

On-line current measurements in primary value

Comprehensive local HMI

Universal auxiliary supply

Compact design suitable for circuit breaker or panel mounting

Optional MODBUS RTU communication

Non-volatile memory for setting and fault records

Self-supervision

User selectable rated frequency 50 / 60 Hz

Operation Functionality

Relay functions

REF601 offers pre-configured functionality which facilitates easy and fast

commissioning of switchgear. To emphasize the relay’s simplicity of usage,

only application specific parameters needs to set within the relay’s intended area of application.

The settings can be changed by LHMI (local human-machin interface) or

through optional communication interface MODBUS master with setting capability.

The relay offers protection, control, measurement and condition monitoring functionality.

The table indicates the Functions supported by the IED

Optional function

Communication on MODBUS RTU Protocol

Other Functions

Self Supervision

The IED is provided with an extensive self-supervision system which

continuously supervises the software and the electronics.

It handles runtime fault situations and informs the user about an existing fault via the LHMI.

When in an IED internal fault is detected, the green Ready LED ceases to

glow and the self-supervision output contact is activated. Internal fault

indications have the highest priority on the LHMI. None of the other

LHMI indications can override the internal fault indication. An indication

about the fault is also shown as a message on the LHMI. The text IRF with

an additional text message, a code is shown to indicate the fault type.

The user can try to eliminate the fault by restarting the IED. If the fault is

still found, the IED stays in internal fault mode. All other output contacts

are released and locked for the internal fault.

The self-supervision signal output operates on the closed circuit principle.

Under normal conditions the relay is energized and the contact gap 5-6 in

connector XK2 is closed. If the auxiliary power supply fail or an internal

fault is detected, the contact gap 5-6 is opened.