Monitoring; Supervision Of Ma Input Signals; Event Counter Cntggio; Disturbance Report Drprdre - ABB RED670 Product Manual

Line differential protection RED670 ANSI
Customized
Product version: 1.2
an IED, either for forcing the unused inputs in other function
blocks to a certain level/value, or for creating certain logic.

13. Monitoring

Measurements CVMMXN, CMMXU, VNMMXU, VMMXU,
CMSQI, VMSQI
The measurement functions are used to get on-line information
from the IED. These service values make it possible to display
on-line information on the local HMI and on the Substation
automation system about:
• 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:
• Sequential of events
• Indications
• Event recorder
ABB
• Trip value recorder
• Disturbance recorder
• Fault locator
The Disturbance report function is characterized by great
flexibility regarding configuration, initiating 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.
Sequential of events DRPRDRE
Continuous event-logging is useful for monitoring the system
from an overview perspective and is a complement to specific
disturbance recorder functions.
The sequential of events 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 short term (for
example corrective actions) and in the long term (for example
functional analysis).
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