Monitored Data; Operation Principle - ABB RET650 Technical Manual

1MRK 504 135-UEN A
Name Values (Range)
OperationStep2
OpMode2
U2<
t2
Table 133: UV2PTUV Non group settings (basic)
Name Values (Range)
GlobalBaseSel
ConnType
9.1.6
9.1.7
Technical manual
Unit
Off -
On
1 out of 3 -
2 out of 3
3 out of 3
1 - 100 %UB
0.000 - 60.000 s
Unit
1 - 6 -
PhN DFT -
PhN RMS
PhPh DFT
PhPh RMS

Monitored data

Table 134: UV2PTUV Monitored data
Name
UL1
UL2
UL3

Operation principle

Two-step undervoltage protection (UV2PTUV) is used to detect low power system
voltage. UV2PTUV has two voltage measuring steps with separate time delays. If one,
two or three phase voltages decrease below the set value, a corresponding START
signal is generated. UV2PTUV 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 below the set point. If the voltage
remains below the set value for a time period corresponding to the chosen time delay,
the corresponding trip signal is issued. The time delay characteristic is settable for step
1 and can be either definite or inverse time delayed. Step 2 is always definite time
delayed.
UV2PTUV can be set to measure phase-to-earth fundamental value, phase-to-phase
fundamental value, phase-to-earth true RMS value or phase-to-phase true RMS value.
The choice of the measuring is done by the parameter ConnType. The voltage related
settings are made in percent of base voltage which is set in kV phase-to-phase voltage.
This means operation for phase-to-earth voltage under:
Step Default
- On
- 1 out of 3
1 50
0.001 5.000
Step Default
1 1
- PhN DFT
Type Values (Range)
REAL -
REAL -
REAL -
Section 9
Voltage protection
Description
Enable execution of step 2
Number of phases required to operate (1
of 3, 2 of 3, 3 of 3) from step 2
Voltage start value (DT & IDMT) in % of
UBase for step 2
Definie time delay of step 2
Description
Selection of one of the Global Base Value
groups
Group selector for connection type
Unit Description
kV Voltage in phase L1
kV Voltage in phase L2
kV Voltage in phase L3
205