Identifying The Function To Test In The Technical Reference Manual; Differential Protection; Busbar Differential Protection; General - ABB REB670 Commissioning Manual

1MRK 505 372-UEN A
10.2
10.3
10.3.1
10.3.1.1
Busbar protection REB670 2.2 IEC
Commissioning manual
Testing functionality by secondary injection
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.
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.

Differential protection

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.

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.
The connection of the test set to REB670 is greatly simplified if the RTXP 24 test
switch is included.When the test handle RTXH 24 is inserted in the test switch, the
preparations for testing are automatically carried out in the proper sequence, that is:
1. firstly blocking of the tripping circuits
2. then short-circuiting of the current circuits on the transformer side
3. then opening of current transformer circuits
4. then making IED terminals accessible from the terminals on the test plug
handle.
Section 10
M11748-2 v4
IP10805-1 v1
SEMOD127371-1 v2
GUID-2B18C54A-3D20-49B3-A0AF-BBD2B99D8A80 v1
SEMOD65859-3 v4
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