operate time setting. More information can be found in the General
function block features section in this manual.
The timer calculates the start duration value START_DUR, which indicates the
percentage ratio of the start situation and the set operation time. The value is
available in the monitored data view.
Blocking logic
There are three operation modes in the blocking functionality. The operation modes
are controlled by the BLOCK input and the global setting "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.
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 213: IDMT curves supported by different stages
Curve name
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
Table continues on next page
Section 4 1YHT530004D05 D
Protection functions
208 615 series
Technical Manual
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