Verifying The Settings - ABB RET670 Commissioning Manual

Section 10
Testing functionality by secondary injection
10.5.16.1

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>/V<))/VRPVOC (51V,2(I>/V<)):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 PICKUP and STOC signals are set.
The set trip value in secondary amperes is calculated according to the following equations:
First part of the characteristic (Restrain voltage ≤ 25% of
Picup Curr
ANSI13000291 V1 EN-US
Second part of the characteristic (25% of
valid when setting parameter
 Pickup Curr






 

ANSIEQUATION2433 V2 EN-US
Third part of the characteristic (
Picup Curr
ANSIEQUATION2434 V1 EN-US
Example (rated secondary current = 5A):
CT ratio
VT ratio
Pickup_Curr
VDepFact
VHighLimit
IBase
VBase
A test for each section of the characteristic of the function VRPVOC may be performed; that
may be achieved by applying the following voltages:
First section of the characteristic:
164
Operation is set to Enabled .
In the following equations, restrain voltage is the magnitude of the minimum
phase-to-phase voltage in secondary volts.
_ CT sec VDepFact
IBase
× × ×
100 CTprim
_ CT sec VDepFact


IBase 1
× ×  × −

100 CTprim 100


( V V HighLimit 25 )
− VT sec
VBase
× ×
100 VTprim
_ sec
CT
IBase
× ×
100 CTprim
100
VBase ≤ Restrain voltage ≤ VHighLimit /100* VBase ),
VDepMode = Slope :


25 VT sec


Re strainVoltage VBase
× − × ×

10 0 0 VTprim

VHighLimit /100* VBase ≤ Restrain voltage):
10 000/5A
10 kV/100 V
100%
25%
100%
10 000 A
10 kV
GUID-3A2B7FF5-330E-4A0D-AB74-EBAE6258C176 v1
GUID-39632D30-A8D8-417D-985C-8F886106783E v4
VBase ):


Pickup Curr _ CT sec VDepFact
 

IB a a se
+ × × ×
 

100 CTprim 100
 
 

Commissioning manual
1MRK 504 154-UUS B
(Equation 91)



(Equation 92)
(Equation 93)