Table 111:
OV2PTOV Non group settings (basic)
Name
Values (Range)
Unit
Step
Default
Description
ConnType
PhN DFT
PhPh DFT
PhN RMS
PhPh RMS
-
-
PhN DFT
Group selector for connection type
GlobalBaseSel
1 - 12
-
1
1
Selection of one of the Global Base
Value groups
7.2.6
Monitored data
PID-3535-MONITOREDDATA v6
Table 112:
OV2PTOV Monitored data
Name
Type
Values (Range)
Unit
Description
UL1
REAL
-
kV
Voltage in phase L1
UL2
REAL
-
kV
Voltage in phase L2
UL3
REAL
-
kV
Voltage in phase L3
7.2.7
Operation principle
M15330-3 v11
Two step overvoltage protection OV2PTOV is used to detect high power system
voltage. OV2PTOV has two steps with separate time delays. If one-, two- or three-
phase voltages increase above the set value, a corresponding START signal is
issued. OV2PTOV can be set to START/TRIP, based on
1 out of 3
,
2 out of 3
or
3
out of 3
of the measured voltages, being above the set point. If the voltage remains
above the set value for a time period corresponding to the chosen time delay, the
corresponding trip signal is issued.
The time delay characteristic is individually chosen for the two steps, and can be
either definite time or inverse time delayed.
The voltage related settings are made in percent of the global set base voltage
UBase
, which is set in kV, phase-to-phase.
OV2PTOV can be set to measure phase-to-earth fundamental value, phase-to-phase
fundamental value, phase-to-earth RMS value or phase-to-phase RMS value. The
choice of measuring is done by the parameter
ConnType
.
The setting of the analog inputs are given as primary phase-to-earth or phase-to-
phase voltage. OV2PTOV will operate if the voltage gets higher than the set
percentage of the set base voltage
UBase
. This means operation for phase-to-earth
voltage over:
(%)
(
)
3
U
UBase kV
>
×
EQUATION1434 V1 EN-US
(Equation 26)
1MRK 505 384-UEN A
Section 7
Voltage protection
Breaker protection REQ650 2.2 IEC
181
Technical manual
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