ABB 615 Series - Variation Validation

V_A
V_C
V_B
DIPST
INTST
SWELLST
Voltage Int set
Voltage dip set
Voltage swell set
FALSE
TRUE
FALSE
TRUE
FALSE
TRUE
DIPST
INTST
SWELLST
FALSE
TRUE
FALSE
TRUE
FALSE
TRUE
A) Three phase mode
B) Single phase mode
GUID-F44C8E6E-9354-44E4-9B2E-600D66B76C1A-ANSI V2 EN
Figure 531: Detection of three-phase voltage interruption
The module measures voltage variation magnitude on each phase separately, that is, there
are phase-segregated outputs ST_A, ST_B and ST_C for voltage variation indication.
The configuration parameter Phase supervision defines which voltage phase or phases are
monitored. If a voltage phase is selected to be monitored, the function assumes it to be
connected to a voltage measurement channel. In other words, if an unconnected phase is
monitored, the function falsely detects a voltage interruption in that phase.
The maximum magnitude and depth are defined as percentage values calculated from the
difference between the reference and the measured voltage. For example, a dip to 70
percent means that the minimum voltage dip magnitude variation is 70 percent of the
reference voltage amplitude.
The activation of the BLOCK input resets the function and outputs.
10.3.4.3 Variation validation
The validation criterion for voltage variation is that the measured total variation duration
is between the set minimum and maximum durations (Either one of VVa dip time 1, VVa
Section 10 1MAC059074-MB A
Power quality measurement functions
1044 615 series ANSI
Technical Manual