ABB REG670 - Measuring the Operating Limit of Set Values

Test point Reach Value Comments
8 X –02143 x RLdFwd
set
Exact: 0.8 x RFPGZx x tan (ArgDir=20°)
R 0.8 x RLdFwd
set
9 X –0.8 x RLdFwd
set
x
tan(ArgDir=20°)
R 0.8 x RLdFwd
set
10 X 0.17 x (2 x X1
set
+ X0
set
) Exact: 0.5 x (2 x X1
set
X0
set
)/3
R -0.36 x (2 x X1
set
+ X0
set
) Exact: 0.5 x (2X1
set
+ X0
set
)/(3 x
tan(AgNegDir=30°)
11 X 0.27 x (2 x X1
set
+X0
set
) Exact: 0.8 x (2 x X1
set
+ X0
set
)/3
R –0.57 x (2 x X1
set
+ X0
set
) Exact: 0.8 x (2X1
set
+ X0
set
)/(3 x
tan(AgNegDir=30°)
12 X 0.5 x (2 x X1
set
+ X0
set
)/3
R 0.5 x (2 x R1
set
+ R0
set
)/3
13 X 0
R
13.4.3.1 Measuring the operating limit of set values
GUID-24FEBCE7-3409-4204-AA15-A1E0A1605866 v3
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 to find the operating value for test points 2, 3 in table 21.
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 to find the operating value for the phase-to-ground fault C-G
according to figure 45 and table 22.
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
1MRK 502 073-UUS A Section 13
Testing functionality by secondary injection
Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062 155
Commissioning manual