ABB Relion 670 Series Commissioning Manual page 127

1MRK 511 403-UUS Rev. K
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:
If VDepMode = Slope, the minimum measured phase-to-phase voltage is lower than 0,25*VBase; if
VDepMode = Step, the minimum measured phase-to-phase voltage is lower than VHighLimit/
100*VBase:
•
•
•
Second section of the characteristic only:
If VDepMode = Slope, the minimum measured phase-to-phase voltage is between 0,25*VBase and
VHighLimit/100*VBase:
•
•
•
Last section of the characteristic:
If VDepMode = either Slope or Step, the minimum measured phase-to-phase voltage is higher than
VHighLimit/100*VBase:
•
•
•
Bay control REC670
Commissioning manual
_ CT sec 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
VA: Ampl = 10 / √3; Angle = 0°
VB: Ampl = 10 / √3; Angle = 240°
VC: Ampl = 100 / √3; Angle = 120°
VA: Ampl = 50 / √3; Angle = 0°
VB: Ampl = 50 / √3; Angle = 240°
VC: Ampl = 100 / √3; Angle = 120°
VA: Ampl = 105/ √3; Angle = 0°
VB: Ampl = 105/ √3; Angle = 240°
VC: Ampl = 105 / √3; Angle = 120°
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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
Testing functionality by secondary injection


 
Pickup Curr _ CT sec VDepFact

+ × × ×
 
IB a a se

 
100 CTprim 100
 

Section 11
(Equation 15)



(Equation 16)
(Equation 17)
121