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

1MRK 504 154-UUS B
Test point
4
5
6
7
8
9
10
11
12
13
10.4.7.1

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 27. Compare the result of the measurement with the set value.
3. Repeat steps
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
to figure
Commissioning manual
Reach Value
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 RLdFw x
set
tan(ArgDir=20°)
–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 RFPG
1 to 2 to find the operating value for test points 2, 3 in table
1 to 3 to find the operating value for the phase-to-ground fault C-G according
25 and table 28.
Comments
)/3
set
)/3 +
set
LdAngle = angle for the maximal load transfer
Exact: 0.8 x RFPE 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-3FA4B640-38E7-406E-8FCC-8DEDABB024C4 v4
24 and
27
Section 10
103