ABB RELION REG670 Commissioning Manual page 185

1MRK 502 067-UEN B
StartCurr
IECEQUATION2432 V1 EN-US
Second part of the characteristic (25% of
100*
 StartCurr






 

IECEQUATION2433 V1 EN-US
Third part of the characteristic (
StartCurr
IECEQUATION2434 V1 EN-US
Example (rated secondary current = 1A):
CT ratio
VT ratio
StartCurr
VDepFact
UHighLimit
IBase
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:
VDepMode = Slope , the minimum measured phase-to-phase voltage is lower than
If
0,25*
lower than
•
•
•
Second section of the characteristic only:
VDepMode = Slope , the minimum measured phase-to-phase voltage is between
If
0,25*
•
•
•
Last section of the characteristic:
If VDepMode = either Slope or Step , the minimum measured phase-to-phase voltage is
higher than
•
•
•
4. Inject the voltages that are related to the first part of the characteristic, and then slowly
increase the phase current IL1 from 0.0 A up to the value the function operates. The
START and STOC signals must be activated when the amplitude of the phase current IL1
Commissioning manual
CT sec VDepFact
IBase
× × ×
100 CTprim
UBase ), valid when setting parameter VDepMode = Slope :
CT sec VDepFact


IBase 1
× ×  × −

100 CTprim 100


( UH i i ghLimit 25 ) VT sec
−
UBase
× ×
100 VTprim
CT sec
IBase
× ×
100 CTprim
UBase ; if VDepMode = Step , the minimum measured phase-to-phase voltage is
UHighLimit /100* UBase :
UL1: Ampl = 10 / √3; Angle = 0°
UL2: Ampl = 10 / √3; Angle = 240°
UL3: Ampl = 100 / √3; Angle = 120°
UBase and UHighLimit /100* UBase :
UL1: Ampl = 50 / √3; Angle = 0°
UL2: Ampl = 50 / √3; Angle = 240°
UL3: Ampl = 100 / √3; Angle = 120°
UHighLimit /100* UBase :
UL1: Ampl = 105/ √3; Angle = 0°
UL2: Ampl = 105/ √3; Angle = 240°
UL3: Ampl = 105 / √3; Angle = 120°
100
UBase ≤ Restrain voltage ≤ UHighLimit /


25 VT


Re strainVoltage U U Base
× − × ×

100 VTprim

UHighLimit /100* UBase ≤ Restrain voltage):
10 000/1A
10 kV/100 V
100%
25%
100%
10 000 A
10 kV
Testing functionality by secondary injection


sec StartCurr C C T sec VDepFact
 

IBase
+ × × ×
 
 100 CTprim
 
 

Section 12
(Equation 89)


100

(Equation 90)
(Equation 91)
179