2
SPCJ 4D28/E351
Overcurrent and earth-fault
relay module
Contents
Characteristics ................................................................................................................ 2
Description of function .................................................................................................. 3
Overcurrent unit ....................................................................................................... 3
Earth-fault unit.......................................................................................................... 3
Filter characteristics of the measuring inputa ............................................................. 4
Phase discontinuity unit ............................................................................................ 4
Circuit breaker failure protection unit ....................................................................... 4
Output signals ........................................................................................................... 4
Auto-reclose start initiation signals ............................................................................ 5
Second settings .......................................................................................................... 5
Resetting ................................................................................................................... 5
Block diagram ................................................................................................................. 6
Front panel ..................................................................................................................... 7
Operation indicators ....................................................................................................... 8
Settings ........................................................................................................................... 9
Measured data .............................................................................................................. 16
Recorded information ................................................................................................... 17
Menu chart ................................................................................................................... 20
Time/current characteristic curves ................................................................................ 22
Technical data .............................................................................................................. 30
Serial communication parameters ................................................................................. 31
Event codes ............................................................................................................. 31
Remote transfer data................................................................................................ 33
Fault codes.................................................................................................................... 38
Characteristics
Low-set overcurrent stage I> with definite time
or inverse definite time characteristic, the latter
with six selectable inverse-time curves.
High-set overcurrent stage I>> with definite
time characteristic. The high-set stage can be set
out of operation.
Superhigh-set overcurrent stage I>>> with defi-
nite time characteristic. The superhigh-set stage
can be set out of operation.
Low-set neutral overcurrent stage I
0
> with defi-
nite time or inverse definite time characteristic,
the latter with six selectable inverse-time curves.
High-set neutral current stage I
0
>> with defi-
nite time characteristic. The high-set stage can
be set out of operation.
Phase discontinuity stage with definite time
characteristic. The phase discontinuity stage
can be set out of operation.
Output relay matrix allowing any start or trip
signal from the protection stages to be routed to
the desired output relay.
Flexible configuration of auto-reclose start ini-
tiation signals.
Local display of measured and set values and
data recorded at the moment of a fault. Reading
and writing of setting values either via local
display and front panel push-buttons or from
higher-level systems over the serial interface and
the fibre-optic bus.
Self-supervision system continuously monitor-
ing the operation of the electronics and the
microprocessor. When a permanent fault is de-
tected the alarm output relay operates and the
other relay outputs are blocked.
1MRS 751890-MUM EN
Issued 2000-07-20
Version A
Checked
Approved
Data subject to change without notice
Содержание SPAA 341 C /E351
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