• The fictive voltage is discarded if the fault current disappears while the fictive
voltage is in use
• The phase angle cannot be reliably measured before the fault situation.
DPH3xPDOC can be forced to non-directional operation with the NON_DIR input.
When the NON_DIR input is active, DPH3xPDOC operates as a non-directional
overcurrent protection regardless of the Directional mode setting.
GUID-718D61B4-DAD0-4F43-8108-86F7B44E7E2D V1 EN
Figure 101: Operating zones at minimum magnitude levels
Level detector
The measured phase currents are compared to the set Start value. If the measured
value exceeds the set Start value, the level detector reports the exceeding of the
value, together with the directional results of that phase, to the phase selection
logic. If the ENA_MULT input is active, the Start value setting is multiplied by the
Start value Mult setting.
The IED does not accept the
Start value or Start value Mult setting
if the product of these settings exceeds the Start value setting range.
Section 4 1YHT530004D05 D
Protection functions
204 615 series
Technical Manual
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