ABB REG670 - Voltage-Restrained Time Overcurrent Protection VRPVOC(51 V); Verifying the Settings

8. Finally check that pickup and trip information is stored in the event menu.
9. Inject rated symmetric three phase voltage to the IED.
10. Set the injected current to 200% of the operate level of the tested stage, switch on
the current. The function does not pickup and trip.
11. Inject 95% of the set 27_pick_up value symmetric three-phase voltage to the IED.
12. Set the injected current to 200% of the operate level of the tested stage, switch on
the current. The function does pickup and trip.
13.5.14 Voltage-restrained time overcurrent protection VRPVOC(51V)
GUID-764DA61A-D987-4358-867A-DA43ADDC6E57 v5
Prepare the IED for verification of settings outlined in Section
"Preparing the IED to
verify settings".
13.5.14.1 Verifying the settings
GUID-3A2B7FF5-330E-4A0D-AB74-EBAE6258C176 v1
Verifying settings by secondary injection
GUID-39632D30-A8D8-417D-985C-8F886106783E v4
1. Connect the test set for three-phase current injection and three-phase voltage
injection to the appropriate IED terminals.
2. Go to Main menu/Settings/IED Settings/Current protection/
VoltageRestOverCurr ( 51V,2(I>/V<))/VRPVOC (51V,2(I>/V<)):1/General
and make sure that the function is enabled, that is, Operation is set to Enabled.
3. The test of the function may be performed by injecting restrain voltage and
increasing the injected current(s). Note the value at which the PICKUP and
STOC signals are set.
In the following equations, restrain voltage is the magnitude of the
minimum phase-to-phase voltage in secondary volts.
The set trip value in secondary amperes is calculated according to the following
equations:
First part of the characteristic (Restrain voltage ≤ 25% of VBase):
Picup Curr
IBase
CT
CTprim
VDepFact_ sec
100 100
× × ×
ANSI13000291 V1 EN-US (Equation 89)
Second part of the characteristic (25% of VBase ≤ Restrain voltage ≤ VHighLimit/
100*VBase), valid when setting parameter VDepMode = Slope:
Pickup Curr
IBase
CT
CTprim
VDepFact_ sec
100
1
100
× ×






× −






VVHighLimit
VBase
VT
VTprim
strainVoltage
−
( )
× ×
× −
25
100
25
10sec
Re
00 100
× ×




















+ ×VBase
VT
VTprim
Pickup Curr
IB
sec _
aase
CT
CTprim
VDepFact
× ×






sec
100
ANSIEQUATION2433 V2 EN-US (Equation 90)
1MRK 502 073-UUS A Section 13
Testing functionality by secondary injection
Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062 213
Commissioning manual