Voltage variation measurement can be done to the phase-to-ground and phase-to-phase
voltages. The power quality standards do not specify whether the measurement should be
done to phase or phase-to-phase voltages. However, in some cases it is preferable to use
phase-to-ground voltages for measurement. The measurement mode is always TRMS.
10.3.7 Signals
Table 928: PQSS Input signals
Name Type Default Description
I_A SIGNAL 0 Phase A current magnitude
I_B SIGNAL 0 Phase B current magnitude
I_C SIGNAL 0 Phase C current magnitude
V_A SIGNAL 0 Phase-to-ground voltage A
V_B SIGNAL 0 Phase-to-ground voltage B
V_C SIGNAL 0 Phase-to-ground voltage C
BLOCK BOOLEAN 0=False Block signal for activating the blocking mode
Table 929: PQSS Output signals
Name
Type Description
TRIP BOOLEAN Voltage variation detected
PICKUP BOOLEAN Voltage variation present
SWELLST BOOLEAN Voltage swell active
DIPST BOOLEAN Voltage dip active
INTST BOOLEAN Voltage interruption active
10.3.8 Settings
Table 930: PQSS Group settings (Basic)
Parameter
Values (Range) Unit Step Default Description
Reference voltage 10.0...200.0 %Un 0.1 57.7 Reference supply voltage in %
Voltage dip set 1 10.0...100.0 % 0.1 80.0 Dip limit 1 in % of reference voltage
VVa dip time 1 0.5...54.0 cycles 0.1 3.0 Voltage variation dip duration 1
Voltage dip set 2 10.0...100.0 % 0.1 80.0 Dip limit 2 in % of reference voltage
VVa dip time 2 10.0...180.0 cycles 0.1 30.0 Voltage variation dip duration 2
Voltage dip set 3 10.0...100.0 % 0.1 80.0 Dip limit 3 in % of reference voltage
VVa dip time 3 2000...60000 ms 10 3000 Voltage variation dip duration 3
Voltage swell set 1 100.0...140.0 % 0.1 120.0 Swell limit 1 in % of reference voltage
Table continues on next page
Section 10 1MAC059074-MB A
Power quality measurement functions
1056 615 series ANSI
Technical Manual
To Next Page
Loading...
