Verifying The Settings - ABB Relion 670 Series Commissioning Manual

Section 11
Testing functionality by secondary injection
11.5.18.2

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,
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.
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
ANSI13000291 V1 EN-US
Second part of the characteristic (25% of VBase ≤ Restrain voltage ≤ VHighLimit/100*VBase), valid
when setting parameter VDepMode = Slope:


Pickup Curr





 

ANSIEQUATION2433 V2 EN-US
Third part of the characteristic (VHighLimit/100*VBase ≤ Restrain voltage):
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:
198
In the following equations, restrain voltage is the magnitude of the minimum phase-
to-phase voltage in secondary volts.
_ sec
CT VDepFact
IBase
× × ×
100 CTprim


_ CT sec VDepFact
× ×  × −
IBase  1


100 CTprim 100
( )
−
V V HighLimit 25 VT sec
× ×
VBase
100
VTprim
_ CT sec
IBase
× ×
100 CTprim
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100




25 VT sec
× − × ×
 Re strainVoltage VBase
 10 0 0 VTprim
10 000/5A
10 kV/100 V
100%
25%
100%
10 000 A
10 kV
1MRK 504 165-UUS Rev. J
GUID-3A2B7FF5-330E-4A0D-AB74-EBAE6258C176 v1
GUID-39632D30-A8D8-417D-985C-8F886106783E v4


 
 Pickup Curr _ CT sec VDepFact
+ × × ×
  IB a a se

  100 CTprim 100
 

Transformer protection RET670
Commissioning manual
(Equation 95)



(Equation 96)
(Equation 97)