ABB Relion 620 Series, Technical Manual

Page: 379 / 1224

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 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 375: Timer characteristics supported by different stages
Operating curve type 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 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 curve x x
(18) RI type x
(19) RD type x
EFIPTOC supports only definite time characteristics.
For a detailed description of timers, see
Chapter 11 General function
block features
in this manual.
Table 376: Reset time characteristics supported by different stages
Reset curve type EFLPTOC EFHPTOC Note
(1) Immediate x x Available for all operate time curves
(2) Def time re-
set x x Available for all operate time curves
(3) Inverse reset x x Available only for ANSI and user
programmable curves
1MRS757644 H Protection functions
620 series
Technical Manual
379