output" mode, the function operates normally but the
OPERATE
,
OPR_A
,
OPR_B
and
OPR_C
outputs are not activated.
4.1.4.5
Timer characteristics
DPH3xPDOC supports both DT and IDMT characteristics. The timer characteristics
can be selected 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 IED provides 16 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 the ABB praxis and are referred to as RI and RD. In addition
to this, a programmable curve can be used if none of the standard curves are
applicable. The DT characteristic can be chosen by selecting the
Operating curve
type values "ANSI Def. Time" or "IEC Def. Time". The functionality is identical in both
cases.
The list of characteristics, which matches the list in the IEC 61850-7-4 specification,
indicates the characteristics supported by different stages.
Table 294: IDMT curves supported by different stages
Operating curve type
Supported by
DPH3LPDOC
DPH3HPDOC
(1) ANSI Extremely Inverse
x
x
(2) ANSI Very Inverse
x
(3) ANSI Normal Inverse
x
x
(4) ANSI Moderately Inverse
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
(11) IEC Inverse
x
(12) IEC Extremely Inverse
x
x
(13) IEC Short Time Inverse
x
(14) IEC Long Time Inverse
x
(17) Programmable
x
x
For a detailed description of the timers, see
in this manual.
Protection functions
1MRS757644 H
306
620 series
Technical Manual
