ABB Relion 670 series - Section 7 Differential Protection; High Impedance Differential Protection, Single Phase HZPDIF (87); Identification; Application

Section 7 Differential protection
7.1 High impedance differential protection, single phase
HZPDIF (87)
7.1.1 Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
High impedance differential protection,
single phase
HZPDIF
Id
SYMBOL-CC V2 EN
87
7.1.2 Application
The 1Ph High impedance differential protection function HZPDIF (87) can be used as:
• Generator differential protection
• Reactor differential protection
• Busbar differential protection
• Autotransformer differential protection (for common and serial windings only)
• T-feeder differential protection
• Capacitor differential protection
• Restricted ground fault protection for transformer, generator and shunt reactor
windings
• Restricted ground fault protection
The application is dependent on the primary system arrangements and location of
breakers, available CT cores and so on.
1MRK 506 369-UUS - Section 7
Differential protection
Line distance protection REL670 2.2 ANSI 135
Application manual