ABB RET670 Product Manual page 22

Transformer protection RET670
Customized
Product version: 1.2
• measured voltages, currents, frequency,
active, reactive and apparent power and
power factor
• primary and secondary phasors
• positive, negative and zero sequence
currents and voltages
• mA, input currents
• pulse counters
Supervision of mA input signals
The main purpose of the function is to measure
and process signals from different measuring
transducers. Many devices used in process
control represent various parameters such as
frequency, temperature and DC battery voltage as
low current values, usually in the range 4-20 mA
or 0-20 mA.
Alarm limits can be set and used as triggers, e.g.
to generate trip or alarm signals.
The function requires that the IED is equipped
with the mA input module.
Event counter CNTGGIO
Event counter (CNTGGIO) has six counters which
are used for storing the number of times each
counter input has been activated.
Disturbance report DRPRDRE
Complete and reliable information about
disturbances in the primary and/or in the
secondary system together with continuous event-
logging is accomplished by the disturbance report
functionality.
Disturbance report DRPRDRE, always included in
the IED, acquires sampled data of all selected
analog input and binary signals connected to the
function block with a, maximum of 40 analog and
96 binary signals.
The Disturbance report functionality is a common
name for several functions:
• Event list
• Indications
• Event recorder
• Trip value recorder
• Disturbance recorder
The Disturbance report function is characterized
by great flexibility regarding configuration, starting
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1MRK 504 117-BEN D
conditions, recording times, and large storage
capacity.
A disturbance is defined as an activation of an
input to the AxRADR or BxRBDR function blocks,
which are set to trigger the disturbance recorder.
All signals from start of pre-fault time to the end
of post-fault time will be included in the recording.
Every disturbance report recording is saved in the
IED in the standard Comtrade format. The same
applies to all events, which are continuously
saved in a ring-buffer. The local HMI is used to
get information about the recordings. The
disturbance report files may be uploaded to
PCM600 for further analysis using the disturbance
handling tool.
Event list DRPRDRE
Continuous event-logging is useful for monitoring
the system from an overview perspective and is a
complement to specific disturbance recorder
functions.
The event list logs all binary input signals
connected to the Disturbance report function. The
list may contain up to 1000 time-tagged events
stored in a ring-buffer.
Indications DRPRDRE
To get fast, condensed and reliable information
about disturbances in the primary and/or in the
secondary system it is important to know, for
example binary signals that have changed status
during a disturbance. This information is used in
the short perspective to get information via the
local HMI in a straightforward way.
There are three LEDs on the local HMI (green,
yellow and red), which will display status
information about the IED and the Disturbance
report function (triggered).
The Indication list function shows all selected
binary input signals connected to the Disturbance
report function that have changed status during a
disturbance.
Event recorder DRPRDRE
Quick, complete and reliable information about
disturbances in the primary and/or in the
secondary system is vital, for example, time-
tagged events logged during disturbances. This
information is used for different purposes in the
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