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Section 10
Testing functionality by secondary injection
It could be useful to have a printer for hard copies. The correct start criteria and behavior of the
disturbance recording function can be checked when IED protective functions are tested.
When the IED is brought into normal service it is recommended to delete all recordings, made during
commissioning to avoid confusion in future fault analysis.
All recordings in the IED can be deleted in two ways:
1.
in the local HMI under Main menu/Clear /Reset disturbances, or
2.
in the Disturbance handling tool in PCM600 by selecting Delete all recordings in the IED... in the
window Available Recordings in IED.
10.1.4
Event recorder (ER) and Event list (EL)
The result from the event recorder and event list can be viewed on the local HMI or, after upload, in
PCM600 as follows:
1.
on the local HMI under Main menu/Events , or in more details via
2.
the Event Viewer in PCM600.
The internal FIFO register of all events will appear when the event viewer is launched.
When the IED is brought into normal service it is recommended to delete all events resulting from
commissioning tests to avoid confusion in future fault analysis. All events in the IED can be cleared in
the local HMI under Main Menu//Clear/Clear internal event list or Main menu /Clear/Clear
process event list . It is not possible to clear the event lists from PCM600.
When testing binary inputs, the event list (EL) might be used instead. No uploading or analyzing of
registrations is then needed since the event list keeps running, independent of start of disturbance
registration.
10.2
Identifying the function to test in the technical
reference manual
Use the technical manual to identify function blocks, logic diagrams, input and output signals, setting
parameters and technical data.
10.3
Differential protection
10.3.1
Busbar differential protection
The two-zone busbar differential protections and the six-zone busbar differential protection do share
the same core features and fundamental principles of operation, although some features may differ.
For the installation and commissioning, they share also the same principles and similar procedures.
For presentation simplicity purpose, only the installation and commissioning of the two-zone busbar
differential protection applications are described here to illustrate the principle.
10.3.1.1
General
Secondary injection testing is a normal part of the commissioning. The operating value of all
protection functions, the output to the proper trip and alarm contacts and the operation of binary input
signals is checked and documented for future reference.
72
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1MRK 505 372-UEN Rev. K
M12645-2 v7
M11748-2 v4
IP10805-1 v1
SEMOD127371-1 v2
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SEMOD65859-3 v4
Busbar protection REB670
Commissioning manual
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