ABB Relion REC615 - Earth-Fault Protection; Non-Directional Earth-Fault Protection (F)Efxptoc

4.1.4.9 Technical data
Table 302: PHPTUC Technical data
Characteristic Value
Operation accuracy Depending on the frequency of the current
measured: f
n
±2 Hz
±1.5% of the set value or ±0.002 × I
n
Start time Typically <55 ms
Reset time <40 ms
Reset ratio Typically 1.04
Retardation time <35 ms
Operate time accuracy in definite time mode mode ±1.0% of the set value or ±20 ms
4.2 Earth-fault protection
4.2.1 Non-directional earth-fault protection (F)EFxPTOC
4.2.1.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Non-directional earth-fault protec-
tion, low stage
(F)EFLPTOC Io> 51N-1
Non-directional earth-fault protec-
tion, high stage
EFHPTOC Io>> 51N-2
Non-directional earth-fault protec-
tion, instantaneous stage
EFIPTOC Io>>> 50N/51N
4.2.1.2 Function block
FEFLPTOC
Io
BLOCK
START
OPERATE
ENA_MULT
EFHPTOC
Io
BLOCK
START
OPERATE
ENA_MULT
EFIPTOC
Io
BLOCK
START
OPERATE
ENA_MULT
Figure 138: Function block
1MRS758755 C
Protection functions
REC615 & RER615
Technical Manual
277