Transient-Intermittent Earth-Fault Protection Intrptef (Ansi 67Ntef/Nief) - ABB RELION REX640 Technical Manual

Protection functions
4.2.2.15 Technical revision history
Table 554: DEFLPDEF Technical revision history
Product
connectivi
ty level
PCL4
4.2.3 Transient-intermittent earth-fault protection INTRPTEF
(ANSI 67NTEF/NIEF)
4.2.3.1 Identification
Function description
Transient/intermittent earth-fault
protection
4.2.3.2 Function block
Figure 272: 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.
4.2.3.4 Analog channel configuration
INTRPTEF has two analog group inputs which must be properly configured.
Table 555: Analog inputs
Input
IRES
URES
482
Technical Change
revision
Start value maximum value extended to 10.000xIn.
H Setting
IEC 61850 IEC 60617
identification identification
INTRPTEF Io> -> IEF
Description
Residual current (measured or calculated)
Residual voltage (measured or calculated)
1MRS759142 F
ANSI/IEEE C37.2
device number
67NTEF/NIEF
REX640
Technical Manual