ABB
3
1MDB07207-YN
Feeder Protection
REF601
Product version: 2.0
1. Description
REF601 is a dedicated feeder protection relay,
intended for the protection and control of utility
substations and industrial power systems, in primary
and secondary distribution networks. REF601 is a
member of ABB’s Relion
®
product family and part of
its 605 series.
The relay uses the Rogowski coil sensors for cur-
rent measurement. The new feeder protection relay
is designed to unleash the advantages of current
sensors for protection and control in medium voltage
applications.
2. Relay functions
REF601 offers pre-configured functionality which fa-
cilitates easy and fast commissioning of switchgear.
To emphasize the relay’s simplicity of usage, only ap-
plication 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.
Issued: 2012-03-27
Revision: E
Table 1. Supported functions of REF601
Functionality
IEC
ANSI
Non-directional overcurrent protection, low-set stage
3I>
51
Non-directional overcurrent protection, high-set stage
3I>>
50-1
Earth-fault protection, low-set stage
Io>
51N
Earth-fault protection, high-set stage
Io>>
50N
Three phase transformer inrush detector
3I
2f
>
68
Non-directional overcurrent protection, very high-set stage
3I>>>
50-2
Control
Condition monitoring
Trip circuit supervision
TCS
TCM
Measurement
Circuit-breaker control
I <-> O CB I <-> O CB
Protection
Three-phase current measurement
3I
3I
Residual current measurement
Io
In
Содержание REF601
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