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

1MRK 502 073-UUS A
13.4.3.1
Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062
Commissioning manual
Test point Reach Value
8 X –02143 x RLdFwd
R 0.8 x RLdFwd
9 X –0.8 x RLdFwd
tan(ArgDir=20°)
R 0.8 x RLdFwd
10 X 0.17 x (2 x X1
R -0.36 x (2 x X1
11 X 0.27 x (2 x X1
R –0.57 x (2 x X1
12 X 0.5 x (2 x X1
R 0.5 x (2 x R1
13 X 0
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 44 and table 21. Compare the result of the measurement 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
according to figure
Test points 8, 9, 10 and 11 are intended to test the directional lines
of impedance protection. Since directionality is a common
function for all six measuring zones, it is only necessary to test
points 8, 9, 10 and 11 once, in the forward direction in order to
test the accuracy of directionality (directional angles). Directional
functionality testing (trip inside, no-trip outside) should always be
Testing functionality by secondary injection
set
set
x
set
set
+ X0 )
set set
+ X0 )
set set
+X0 )
set set
+ X0 )
set set
+ X0 )/3
set set
+ R0 )/3
set set
to find the operating value for test points 2, 3 in table 21.
to find the operating value for the phase-to-ground fault C-G
45 and table 22.
Section 13
Comments
Exact: 0.8 x RFPGZx 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 (2X1 + X0 )/(3 x
set set
tan(AgNegDir=30°)
GUID-24FEBCE7-3409-4204-AA15-A1E0A1605866 v3
)/3
155