GUID-FC28C85A-6199-4249-8E01-C8693B005D3D V3 EN
Figure 193: Operation during test operation of the line differential protection
4.3.1.5 Commissioning
The commissioning of the line differential protection scheme would be difficult
without any support features in the functionality because of the relatively long
distance between the IEDs. This has been taken into consideration in the design of
the line differential protection. The communication channel can be used for
echoing the locally fed current phasors from the remote end. By using this mode, it
is possible to verify that differential calculation is done correctly in each phase.
Also, the protection communication operation is taken into account with the
differential current calculation when this test mode is used.
Required material for testing the IED
• Calculated settings
• Terminal diagram
• Circuit diagrams
• Technical and application manuals of the IED
• Single of three-phase secondary current source
• Single of three-phase primary current source
• Timer with start and stop interfaces
• Auxiliary voltage source for the IEDs
• PC with related software, a Web browser for WHMI
The setting and configuration of the IED must be completed before testing.
The terminal diagram, available in the technical manual, is a general diagram of the
IED.
The same diagram is not always applicable to each specific
delivery, especially for the configuration of all the binary inputs
1YHT530004D05 D Section 4
Protection functions
615 series 367
Technical Manual
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