Section 7 IEC 61850 communication engineering
7.1 IEC 61850 protocol references and pre-conditions
To engineer the IEC 61850 protocol interface for the protection relay, the following
additional manuals or knowledge of their contents is required.
• Knowledge of the IEC 61850 engineering process as described in the IEC 61850
standard
• The technical manual describes the function blocks defined as logical nodes
• The IEC 61850 engineering guide
• The IEC 61850 conformance documents for the protection relay to be engineered
• The IEC 61850 parameter list
7.2 IEC 61850 interface
For more information on the implementation of IEC 61850 in
protection relays, see IEC 61850 engineering guide and conformance
documents.
Table 9: Function blocks and IEC 61850 Edition 1 and Edition 2 Logical Nodes
Function
IEC 61850 Logical device Logical nodes in
Ver.2.0
Logical nodes in
Ver.1.0
Protection
Three-phase non-directional overcurrent protection, low
stage
PHLPTOC LD0 PHLPTOC PHLPTOC
Three-phase non-directional overcurrent protection, high
stage
PHHPTOC LD0 PHHPTOC PHHPTOC
Three-phase non-directional overcurrent protection,
instantaneous stage
PHIPTOC LD0 PHIPTOC PHIPTOC
Non-directional earth-fault protection, low stage EFLPTOC LD0 EFLPTOC EFLPTOC
Non-directional earth-fault protection, high stage EFHPTOC LD0 EFHPTOC EFHPTOC
Non-directional earth-fault protection, instantaneous stage EFIPTOC LD0 EFIPTOC EFIPTOC
Three-phase directional overcurrent protection, low stage DPHLPDOC LD0 DPHLPTOC
DPHLRDIR
DPHLPTOC
DPHLRDIR
Three-phase directional overcurrent protection, high stage DPHHPDOC LD0 DPHHPTOC
DPHHRDIR
DPHHPTOC
DPHHRDIR
Directional earth-fault protection, low stage DEFLPDEF LD0 DEFLPTOC
DEFLRDIR
DEFLPTOC
DEFLRDIR
Table continues on next page
1MRS241255 B Section 7
IEC 61850 communication engineering
611 series 71
Engineering Manual
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