Timer Characteristics - ABB RELION 620 Series Technical Manual

Section 4
Protection functions
4.1.2.5
246
Blocking logic
There are three operation modes in the blocking functionality. The operation modes
are controlled by the BLOCK input and the global setting in Configuration/System/
Blocking mode, which selects the blocking mode. The BLOCK input can be controlled
by a binary input, a horizontal communication input or an internal signal of the IED
program. The influence of the BLOCK signal activation is preselected with the global
setting Blocking mode.
The Blocking mode setting has three blocking methods. In the "Freeze timers" mode,
the operation timer is frozen to the prevailing value. In the "Block all" mode, the whole
function is blocked and the timers are reset. In the "Block OPERATE output" mode,
the function operates normally but the OPERATE, OPR_A, OPR_B and OPR_C
outputs are not activated.

Timer characteristics

PH3xPTOC 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 ABB praxis and are referred to as RI and RD. In addition, 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 following characteristics, which comply with the list in the IEC 61850-7-4
specification, indicate the characteristics supported by different stages:
Table 245: IDMT curves supported by different stages
Operating curve type
(1) ANSI Extremely Inverse
(2) ANSI Very Inverse
(3) ANSI Normal Inverse
(4) ANSI Moderately Inverse
(6) Long Time Extremely
Inverse
(7) Long Time Very Inverse
(8) Long Time Inverse
(9) IEC Normal Inverse
(10) IEC Very Inverse
(11) IEC Inverse
(12) IEC Extremely Inverse
Table continues on next page
Supported by
PH3LPTOC
x
x
x
x
x
x
x
x
x
x
x
1MRS757644 F
PH3HPTOC
x
x
x
x
x
620 series
Technical Manual