ABB 615 Series - Commissioning

87L
Local phasors Local phasors
Time align PCSRTPC PCSRTPCSample latency Phase shift
I_INST_REM
I_INST_LOC
87L
I_INST_REM
I_INST_LOC
Operation ”Test / blocked” Operation ”On”
CTratio
correction
CTratio
correction
CTratio
correction
0
Remote phasors
GUID-23F2C11A-D27F-4767-9826-79F9F4B7BAA1 V1 EN
Figure 236: 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 protection relays. 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 protection relay
• Calculated settings
• Terminal diagram
• Circuit diagrams
• Technical and application manuals of the protection relay
• 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 protection relays
• PC with related software, a Web browser for WHMI
The setting and configuration of the protection relay must be completed before testing.
The terminal diagram, available in the technical manual, is a general diagram of the
protection relay.
1MAC059074-MB A Section 4
Protection functions
615 series ANSI 483
Technical Manual