Measuring The Operating Limit Of Set Values - ABB REG670 Commissioning Manual

1MRK 502 073-UEN A
13.4.2.1
Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062
Commissioning manual
Testing functionality by secondary injection
Test point Reach Value
4 X
R
5 X
R
6 X
R
7 X
R
8 X
R
9 X
R
10 X
R
11 X
R
12 X
R
13 X
R

Measuring the operating limit of set values

Procedure:
1. Subject the IED to healthy normal load conditions for at least two seconds.
2. Apply the fault condition and slowly decrease the measured impedance to
find the operating value of the phase-to-phase fault for zone 1 according to
test point 1 in figure
with the set value.
3. Repeat steps 1 to 2
Observe that the zones that are not tested have to be blocked and the zone that
is tested has to be released.
4. Repeat steps 1 to 3
E according to figure
0.5 x (2 x X1 + R0 )/3
set set
0.5 x (2 x R1 +R0 )/3 +
set set
RFPEZx
set
0.85 x RFPEZx x tan(ArgLdset)
set
0.85 x RFPEZx
RLdFwset x tan(ArgLdSet)
RLdFw
set
0
RLdFw
set
–02143 x RLdFw
set
0.8 x RLdFw
set
–0.8 x RLdFw x tan(ArgDir=20°)
set
–0.8 x RLdFwd x
set
tan(ArgDir=20°)
0.8 x RLdFw
set
0.17 x (2 x X1 + X0 )
set set
-0.36 x (2 x X1 + X0 )
set set
0.27 x (2 x X1 +X0 )
set set
–0.57 x (2 x X1 + X0 )
set set
0.5 x (2 x X1 + X0 )/3
set set
0.5 x (2 x R1 + R0 )/3
set set
0
RFPEZx
42 and table 19. Compare the result of the measurement
to find the operating value for test points 2, 3 in table
to find the operating value for the phase-to-earth fault L3-
43 and table 20.
Section 13
Comments
ArgLd = angle for the maximal load
transfer
Exact: 0.8 x RFPEZx x tan
(ArgDir=20°)
Exact: 0.5 x (2 x X1 X0 )/3
set set
Exact: 0.5 x (2X1 + X0 )/(3 x
set set
tan(AgNegDir=30°)
Exact: 0.8 x (2 x X1 + X0
set set
Exact: 0.8 x (2X1set + X0set)/(3 x
tan(AgNegDir=30°)
GUID-3FA4B640-38E7-406E-8FCC-8DEDABB024C4 v4
)/3
19
139