4.1.1.6
Timer characteristics
PHxPTOC 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 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 ABB praxis and are referred to as RI and RD. In addition
to this, a user programmable curve can be used if none of the standard curves are
applicable. The DT characteristics 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 timer characteristics supported by different stages comply with the list in
the IEC 61850-7-4 specification, indicate the characteristics supported by different
stages:
Table 218: Timer characteristics supported by different stages
Operating curve type
PHLPTOC
PHHPTOC
(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 Inverse
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
(15) IEC Definite Time
x
x
(17) User programmable
x
x
(18) RI type
x
(19) RD type
x
PHIPTOC supports only definite time characteristic.
For a detailed description of timers, see
in this manual.
1MRS757644 H
Protection functions
620 series
Technical Manual
243
