•
The fictive voltage is discarded after
Voltage Mem time
•
The phase angle cannot be reliably measured before the fault situation.
67/51P, 67/50P can be forced to the non-directional operation with the
NON_DIR
input.
When the
NON_DIR
input is active, 67/51P, 67/50P operates as a non-directional
overcurrent protection, regardless of the
Directional mode
setting.
Operating zone
Non-operating zone
Memory function
operate zone
Min trip
voltage
Min trip
current
Polarizing
quantity
Operating
quantity
GUID-C30CD1A2-93E2-4A92-9FF3-58B7B2A98458 V1 EN
Figure 113:
Operating zones at minimum magnitude levels
Level detector
The measured phase currents are compared phasewise to the set
Pickup value
. If the
measured value exceeds the set
Pickup value
, the level detector reports the exceeding of
the value to the phase selection logic. If the
ENA_MULT
input is active, the
Pickup value
setting is multiplied by the
Pickup value Mult
setting.
1MAC059074-MB A
Section 4
Protection functions
615 series ANSI
235
Technical Manual
Summary of Contents for Relion 615 series
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