Section 2 1MDU07212-YN Rev. D
REF601/REJ601/REM601 overview
12 REF601 / REJ601 / REM601
Application Manual
Additionally, the relay count the number of phase fault trip and earth fault trip into
dedicated trip counters. These trip counters cannot be reset by the user and are
stored in nonvolatile memory.
The values of fault records and trip counters are accessible locally LHMI and
remotely via communication interface of the relay.
2.4.3 Event Log
To collect sequence-of-events (SoE) information, the relay incorporates a non-
volatile memory to store 100 event logs. Each event log includes type of event
along with date and time stamping. The event logs are stored sequentially, the most
recent being first and so on.
The SoE information are accessible locally via LHMI and remotely via
communication interface of the relay.
Table 3: List of event types and related description
Unit ready contact activation will be stored as
an event. This unit ready contact is activated
when power supply is on and no internal
relay fault detected
When trip circuit becomes faulty, an event of
trip circuit faulty will be recorded. & when it
becomes health shall also record it as an
event
Settings (I>,I>>,I>>>,Io>,Io>> and
t>,t>>,t>>>,to>,to>>) alteration will be
captured as an event without setting value.
I>, I>>, I>>>, Io>,
Io>>, t>, t>>,t>>>,
to>, to>>
Circuit breaker failure protection settings -
IBF,I0BF,t Retrip,t Backup
Icbfp,I0cbfp,
t Retrip, t Backup
Negative sequence setting change - I2> and
tI2>
Phase discontinuity setting change - I2/I1>
and tI2/I1>
Thermal protection setting change-
ϑ0,Ib, t↑, t↓s, t↓r, ϑalm, ϑtrip, ϑstrinhibit,
ϑEM
ϑ0,Ib, t↑, t↓s, t↓r,
ϑalm, ϑtrip,
ϑstrinhibit, ϑEM
Under current parameter change - 3I< and
t3I<
Phase reversal setting change – I2R> and
Auto resclose function setting change -
Mode,CB Ready, Activate t Shot, Pulse tp,
cycle t1, cycle t2,cycle t3, cycle t4, Reclaim
tr, Block tb
O→I - Mode, CB
Ready, Activate t #
of Cycle, Pulse tp,
cycle t1, cycle t2,
cycle t3, cycle t4,
Reclaim tr, Block tb
Motor startup and stall protection parameter
change I start> ,Istartup, t startup,
t lockrotor, Max Strt, tn, Restrain 68M
t startup,
t lockrotor,
Max Strt, tn,
Restrain 68M