ABB Relion RER615 - Transient;Intermittent Earth-Fault Protection INTRPTEF

4.2.3 Transient/intermittent earth-fault protection INTRPTEF
4.2.3.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Transient/intermittent earth-fault
protection
INTRPTEF Io> -> IEF 67NIEF
4.2.3.2 Function block
Figure 158: Function block
4.2.3.3 Functionality
The transient/intermittent earth-fault protection function INTRPTEF is a function
designed for the protection and clearance of permanent and intermittent earth
faults in distribution and sub-transmission networks. Fault detection is done from
the residual current and residual voltage signals by monitoring the transients.
The operating time characteristics are according to definite time (DT).
The function contains a blocking functionality. It is possible to block function
outputs, timers or the function itself, if desired.
4.2.3.4 Operation principle
The function can be enabled and disabled with the Operation setting. The
corresponding parameter values are "On" and "Off".
The operation of INTRPTEF can be described with a module diagram. All the
modules in the diagram are explained in the next sections.
1MRS758755 C
Protection functions
REC615 & RER615
Technical Manual
333