Measuring The Operating Limit Of Set Values - ABB RET670 Commissioning Manual

1MRK 504 154-UUS B
Table 30: Test points for phase-to-ground C-G (Ohm/Loop)
Test point
1
2
3
4
5
6
7
8
9
10
11
12
13
10.4.8.1

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
table 29. Compare the result of the measurement with the set value.
3. Repeat steps
Commissioning manual
Reach Value
X (2 x X1 +X0 )/3
set set
R 0
X (2 x X1 + X0 )/3
set set
R 2 x R1 + R0 )/3
set set
X 0.8 x (2 x X1 + X0
set
R 0.8 x (2 x R1 + R0
set
+RFPG
set
X 0.5 x (2 x X1 + R0
set
R 0.5 x (2 x R1 +R0
set
RFPG
set
X 0.85 x RFPG x tan(LdAngleset)
set
R 0.85 x RFPG
X RLdFwdset x tan(LdAngleSet)
R RLdFwd
set
X 0
R RLdFwd
set
X –02143 x RLdFwd
R 0.8 x RLdFwd
set
X –0.8 x RLdFwd
set
tan(ArgDir=20°)
R 0.8 x RLdFwd
set
X 0.17 x (2 x X1 + X0
set
R -0.36 x (2 x X1 + X0
set
X 0.27 x (2 x X1 +X0
set
R –0.57 x (2 x X1 + X0
set
X 0.5 x (2 x X1 + X0
set
R 0.5 x (2 x R1 + R0
set
X 0
R
1 to 2 to find the operating value for test points 2, 3 in table 29.
Comments
)/3
set
)/3
set
)/3
set
)/3 +
set
LdAngle = angle for the maximal load transfer
Exact: 0.8 x RFPG x tan (ArgDir=20°)
set
x
) Exact: 0.5 x (2 x X1
set
) Exact: 0.5 x (2X1
set
) Exact: 0.8 x (2 x X1
set
) Exact: 0.8 x (2X1set + X0set)/(3 x tan(AgNegDir=30°)
set
)/3
set
)/3
set
Testing functionality by secondary injection
X0 )/3
set set
+ X0 )/(3 x tan(AgNegDir=30°)
set set
+ X0 )/3
set set
GUID-24FEBCE7-3409-4204-AA15-A1E0A1605866 v3
26 and
Section 10
107