ABB REG670 Commissioning Manual page 205

1MRK 502 073-UEN A
Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062
Commissioning manual
Testing functionality by secondary injection
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:
If VDepMode = Slope, the minimum measured phase-to-phase voltage is
lower than 0,25*UBase; if VDepMode = Step, the minimum measured phase-
to-phase voltage is lower than UHighLimit/100*UBase:
• UL1: Ampl = 10 / √3; Angle = 0°
• UL2: Ampl = 10 / √3; Angle = 240°
• UL3: Ampl = 100 / √3; Angle = 120°
Second section of the characteristic only:
If VDepMode = Slope, the minimum measured phase-to-phase voltage is
between 0,25*UBase and UHighLimit/100*UBase:
• UL1: Ampl = 50 / √3; Angle = 0°
• UL2: Ampl = 50 / √3; Angle = 240°
• UL3: Ampl = 100 / √3; Angle = 120°
Last section of the characteristic:
If VDepMode = either Slope or Step, the minimum measured phase-to-phase
voltage is higher than UHighLimit/100*UBase:
• UL1: Ampl = 105/ √3; Angle = 0°
• UL2: Ampl = 105/ √3; Angle = 240°
• UL3: Ampl = 105 / √3; Angle = 120°
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 is slightly above 0.25 A on the secondary
side. The corresponding trip signals TROC and TRIP will be activated after
the pre-set time delay has expired.
5. Decrease the current IL1 slowly and note the reset value.
6. Repeat steps 4 and 5 applying voltages that are related to the second and the
last section of the characteristic; the function operates when IL1 is slightly
higher than: 0.5 A in the second section; 1A in the last section.
7. Connect the trip output contact to the input channel of the test set in order to
stop the injection and measure the trip time.
8. If definite time delay is used for the overcurrent step, set the setting
Characterist = IEC Def. Time. Apply the voltages related to the last part of
Section 13
10 000/1A
10 kV/100 V
100%
25%
100%
10 000 A
10 kV
199