Control; Measurement; Event Log; Recorded Data - ABB REJ601 Product Manual

Feeder protection and control / Feeder protection
REF601 / REJ601
Product version: 2.2 FP2
6.

Control

The relay offers control of one circuit breaker
with dedicated push-buttons and guidance on
local HMI for opening and closing. It includes two
dedicated outputs for breaker control. The
breaker control is also possible through optional
MODBUS communication.
7.

Measurement

The relay continuously measures phase currents
and earth current. Earth current can be
measured using external core balance current
transformer or can be calculated internally.
During service, the default view of display shows
the most loaded phase current in primary terms
(Amps) and the earth current. The values
measured can be accessed locally via the user
interface on the relay or remotely via the
communication interface of the relay.
The relay continuously measures negative
sequence current, thermal level and counter
values if these functions are supported as per
application configurations.
8.

Event log

To collect sequence – of – events (SoE)
information, the relay incorporates a non-volatile
memory with a capacity of storing 100 events
with associated time stamps with resolution of
1 ms. Event log includes trip circuit supervision
status, protection operation status, binary I/O
status and relay fault code. The event logs are
stored sequentially, the most recent being first
and so on. The non-volatile memory retains its
data also in case the relay temporarily loses its
auxiliary supply.
The event log facilitates detailed post-fault
analysis of feeder faults and disturbances. The
SoE information can be accessed locally via the
user interface on the relay front panel or
remotely via the communication interface of the
relay.
6
9.

Recorded data

The relay stores fault records of analogue values
for last five trip events in non-volatile memory.
The fault recording is triggered by the trip signal
of protection function. Each fault record includes
the current values for three phases and earth
current of five different instances along with time
stamp. These records enable the user to analyze
the five most recent power system events.
The relay records the number of phase and
earth fault trip events into dedicated trip
counters. These trip counters cannot be reset by
the user and are stored in non-volatile memory.
The recorded information can be accessed
locally via user interface on the relay front panel
and can be uploaded for subsequent fault
analysis.

10. Self-supervision and test function

The relay's built-in self-supervision system con-
tinuously monitors the state of the relay
hardware and the operation of the relay
software. Any fault or malfunction detected will
be used for alerting the operator. A permanent
relay fault will block the protection functions of
the relay to prevent incorrect relay operation.
The relay supports a built-in test mode which
enables user to test the relay HMI and binary
outputs.

11. Trip-circuit supervision

The trip-circuit supervision continuously monitors
the availability and operability of the trip circuit. It
provides open-circuit monitoring both when the
circuit breaker is in its closed and in its open
position. It also detects loss of circuit-breaker
control voltage.

12. Access control

To protect the relay from unauthorized access
and to maintain the integrity of information, the
relay is armed with a three level, role-based user
authentication system with individual password
1MDB07221-YN
Issued: 2017-05-09
Revision: A
ABB