Voltage-Restrained Time Overcurrent Protection Vrpvoc; Verifying The Settings - ABB REG670 2.0 IEC Commissioning Manual

1MRK502053-UEN B
12.5.14
12.5.14.1
Generator protection REG670 2.0 IEC
Commissioning manual
Testing functionality by secondary injection
7. Check that all trip and start contacts operate according to the configuration
(signal matrises).
8. Finally check that start 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 start and trip.
11. Inject 95% of the set ArmU< 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 start and trip.

Voltage-restrained time overcurrent protection VRPVOC

Prepare the IED for verification of settings outlined in section
section "Preparing for test"

Verifying the settings

Verifying settings by secondary injection
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>/U<))/VRPVOC (51V,2(I>/U<)):1/
General and make sure that the function is enabled, that is, Operation is set to
On.
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 START 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 operate value in secondary amperes is calculated according to the
following equations:
First part of the characteristic (Restrain voltage ≤ 25% of UBase):
StartCurr CT
IBase
× ×
100 CTprim
IECEQUATION2432 V1 EN
Second part of the characteristic (25% of UBase ≤ Restrain voltage ≤
UHighLimit/100*UBase), valid when setting parameter VDepMode = Slope:
 StartCurr CT sec
 
IBase
× ×  ×


100 CTprim
 

 UH i i ghLimit 25
( − )
UBase
×
 
100

IECEQUATION2433 V1 EN
Third part of the characteristic (UHighLimit/100*UBase ≤ Restrain voltage):
in this chapter.
sec VDepFact
×
100
VDepFact
 
1
−
 
100 25

 
Re strainVoltage
× −

VT sec 100

×
VTprim
Section 12
"Requirements"
(Equation 89)


VT sec StartCurr
 

U U Base IBase
× × + ×
 

VTprim 100
 
 

and
C C T sec VDepFact

× ×

CTprim 100

(Equation 90)
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