ABB RELION REF615R, Technical Manual

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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 219: Detection of three-phase voltage interruption
The module measures voltage variation magnitude on each phase separately, that is,
phase-segregated status for voltage variation indication is available in monitored data
(PICKUP_A, PICKUP_B and PICKUP_C). 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 dip voltage amplitude.
The activation of the
BLOCK
input resets the function and outputs.
1MRS240050-IB C
Section 8
Power quality measurement functions
REF615R 423
Technical Manual