Table 303: Measurement modes supported by (F)EFxPTOC stages
Measurement mode FEFLPTOC EFHPTOC EFIPTOC
RMS x x
DFT x x
Peak-to-Peak x x x
For a detailed description of the measurement modes, see
Chapter 11.5
Measurement modes
in this manual.
4.2.1.6 Timer characteristics
(F)EFxPTOC supports both DT and IDMT characteristics. The user can select the
timer characteristics with the
Operating curve type
and
Type of reset curve
settings. When the DT characteristic is selected, it is only affected by the
Operate
delay time
and
Reset delay time
settings.
The protection relay provides 55 IDMT characteristics curves, of which seven comply
with the IEEE C37.112 and six with the IEC 60255-3 standard. Two curves follow the
special characteristics of ABB praxis and are referred to as RI and RD. One user
programmable curve can be used if none of the standard curves are applicable. In
addition to this, there are 39 curves for recloser applications. The user can choose
the DT characteristic by selecting the
Operating curve type
values "ANSI Def. Time"
or "IEC Def. Time". The functionality is identical in both cases.
The following characteristics, which comply with the list in the IEC 61850-7-4
specification, indicate the characteristics supported by different stages:
Table 304: Timer characteristics supported by different stages
Operating curve type (F)EFLPTOC EFHPTOC
(1) ANSI Extremely Inverse x x
(2) ANSI Very Inverse x
(3) ANSI Normal Inverse x x
(4) ANSI Moderately Inverse x
(5) ANSI Definite Time x x
(6) Long Time Extremely In-
verse
x
(7) Long Time Very Inverse x
(8) Long Time Inverse x
(9) IEC Normal Inverse x x
(10) IEC Very Inverse x x
Table continues on the next page
Protection functions 1MRS758755 C
280 REC615 & RER615
Technical Manual
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