ABB REF 542plus, Product Manual

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Feeder Terminal REF 542plus
1MRS756269
7
Control
The control and automation capabilities of the
REF 542plus are extremely powerful. Com-
prehensive PLC functionalities are foreseen.
Simple interlocking against switching errors
as well as complex loadshedding schemes can
be easily implemented in the REF 542plus.
Even protection similar functionalities, like
e.g. circuit breaker failure protection or signal
comparison scheme can be programmed.
Fault recorder
The REF 542plus unit is equipped with a
powerful and flexible fault recorder function.
This function can be used to record at most
eight analog input channels and thirty-two
binary signals. The analog input signals are
recorded with a sampling rate of 1.2 kHz for a
time interval of at least 1 second and for a
maximum of 5 seconds. The recording time is
a combination of pre- and post-fault time.
The total recording capability is 5 seconds. It
can be configured 5 records of 1 seconds or a
single record of 5 seconds. The recording can
be started by a protection event, by a binary
signal change or by any user-defined condi-
tion.
Fault records can be transferred locally to a
personal computer from the HMI front port
by using the Operating Tool or remotely from
the communication interface. When uploaded
with the Operating Tool the fault records are
automatically converted into the standard
COMTRADE format. When the fault records
retrieve from the communication interface,
they can be converted with a utility program.
Fault records are stored in non-volatile mem-
ory, so they remain available also after a
power failure.