Woodward High PROTEC MRU4, Руководство пользователя

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Protective Elements
V 012 – Voltage Asymmetry [47]
Available elements:
V012[1] ,V012[2] ,V012[3] ,V012[4] ,V012[5] ,V012[6]
Within the Device planning menu this module can be projected in order to supervise the positive phase sequence
voltage for over- or undervoltage or the negative phase sequence system for overvoltage. This module is based on
the 3-phase voltages.
The module is alarmed, if the threshold is exceeded. The module will trip, if the measured values remain for the
duration of the delay timer above the threshold continuously.
In case that the negative phase sequence voltage is monitored, the threshold »
V2>« can be combined with an
additional percentage criterion » %V2/V1« (AND-connected) in order to prevent faulty tripping in case of a lack of
voltage within the positive phase sequence system.
Application Options of the V 012 Module Setting in Option
ANSI 47 – Negative Sequence Overvoltage
(Supervision of the Negative Phase
Sequence System)
Setting within the Device Planning (V2>)
Device Planning Menu %V2/V1:
The Module trips, if the threshold
U2>
and the ratio of negative to
positive phase sequence voltage is
exceeded (after the delay timer has
expired).
This criterion is to be activated and
parametrized within the parameter
set.
ANSI 59U1 Overvoltage within the Positive
Phase Sequence System
Setting within the Device Planning (V1>)
Device Planning Menu -
ANSI 27U1 Undervoltage within the Positive
Phase Sequence System
Setting within the Device Planning (V1<)
Device Planning Menu -
425 MRU4 DOK-HB-MRU4-2E