Three/Single-Phase Selection Variation Examples - ABB RED615 Technical Manual

1YHT530004D05 D
10.3.4.5
615 series
Technical Manual
limit setting common for the three duration settings. The maximum duration setting
is common for all variation types.
The duration measurement module measures the voltage variation duration of each
phase voltage separately when the Phase mode setting is "Single Phase". The phase
variation durations are independent. However, when the Phase mode setting is
"Three Phase", voltage variation may start only when all the monitored phases are
active. An example of variation duration when Phase mode is "Single Phase" can
be seen in Figure 418. The voltage variation in the example is detected as an
interruption for the phase B and a dip for the phase A, and also the variation
durations are interpreted as independent U_B and U_A durations. In case of single-
phase interruption, the DIPST output is active when either ST_A or ST_B is
active. The measured variation durations are the times measured between the
activation of the ST_A or ST_B outputs and deactivation of the ST_A or ST_B
outputs. When the Phase mode setting is "Three Phase", the example case does not
result in any activation.
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Figure 418: Single-phase interruption for the Phase mode value "Single Phase"

Three/single-phase selection variation examples

The provided rules always apply for single-phase (Phase Mode is "Single Phase")
power systems. However, for three-phase power systems (where Phase Mode is
"Three Phase"), it is required that all the phases have to be activated before the
activation of the START output. Interruption event indication requires all three
phases to undershoot Voltage Int set simultaneously, as shown in
the requirement for interruption for "Three Phase" is no longer fulfilled, variation
is indicated as a dip as long as all phases are active.
In case of a single-phase interruption of
another phase but the third phase is not active, there is no variation indication start
when Phase Mode is "Three Phase". In this case, only the Phase Mode value
"Single Phase" results in the ST_B interruption and the ST_A dip.
Power quality measurement functions
Figure 418, when there is a dip indicated in
Section 10
Figure 414. When
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