ABB RELION REX640 - 4.2.3 Transient-intermittent earth-fault protection INTRPTEF (ANSI 67 NTEF;NIEF); 4.2.3.1 Identification; 4.2.3.2 Function block; 4.2.3.3 Functionality

4.2.2.15 Technical revision history
Table 554: DEFLPDEF Technical revision history
Product
connectivi
ty level
Technical
revision
Change
PCL4 H Setting Start value maximum value extended to 10.000xIn.
4.2.3 Transient-intermittent earth-fault protection INTRPTEF
(ANSI 67NTEF/NIEF)
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 67NTEF/NIEF
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 Description
IRES Residual current (measured or calculated)
URES Residual voltage (measured or calculated)
Protection functions 1MRS759142 F
482 REX640
Technical Manual