Completing The Test; Voltage-Restrained Time Overcurrent Protection Vrpvoc; Verifying The Settings - ABB Relion 670 Series Commissioning Manual

Section 11
Testing functionality by secondary injection
11.4.15.2

Completing the test

Continue to test another functions or end the test by changing the Test mode setting to
Restore connections and settings to their original values, if they were changed for testing
purposes. Make sure that all built-in features for this function, which shall be in operation, are
enabled and with correct settings.
11.4.16

Voltage-restrained time overcurrent protection VRPVOC

Prepare the IED for verification of settings as outlined in section
section
11.4.16.1

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,
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.
The set operate value in secondary amperes is calculated according to the following
equations:
First part of the characteristic (Restrain voltage ≤ 25% of
StartCurr
IECEQUATION2432 V1 EN-US
Second part of the characteristic (25% of
100*







 

IECEQUATION2433 V1 EN-US
Third part of the characteristic (
StartCurr
IECEQUATION2434 V1 EN-US
Example (rated secondary current = 1A):
CT ratio
VT ratio
StartCurr
Table continues on next page
118
"Preparing for test" in this chapter.
Operation is set to On .
In the following equations, restrain voltage is the magnitude of the
minimum phase-to-phase voltage in secondary volts.
CT sec
IBase
× × ×
100 CTprim
UBase ), valid when setting parameter VDepMode = Slope :


StartCurr CT sec VDepFact
× ×  × −
IBase  1


100 CTprim 100
( )
−
UH i i ghLimit 25
VT sec
× ×
UBase
100 VTprim
CT sec
IBase
× ×
100
CTprim
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VDepFact
100
UBase ≤ Restrain voltage ≤ UHighLimit /




25
× − ×
 Re strainVoltage U U Base
 100
UHighLimit /100* UBase ≤ Restrain voltage):
10 000/1A
10 kV/100 V
100%
GUID-5AB7880E-629C-45E5-AF91-3EBDF19DEA79 v2
GUID-764DA61A-D987-4358-867A-DA43ADDC6E57 v5
"Requirements"
GUID-3A2B7FF5-330E-4A0D-AB74-EBAE6258C176 v1
GUID-39632D30-A8D8-417D-985C-8F886106783E v4
UBase ):


 
VT sec StartCurr C C T sec

× + × ×
  IBase

VTprim   100 CTprim
 

Commissioning manual
1MRK 511 403-UEN E
Off .
and
(Equation 15)

VDepFact
×

100 
(Equation 16)
(Equation 17)
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