Measuring The Operating Limit Of Set Values - ABB Relion 670 Series Commissioning Manual

Section 11
Testing functionality by secondary injection
Test point
3
4
5
6
7
8
9
10
11
12
13
11.4.7.3

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 and table . 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
and table .
126
Reach Value
X 0.8 x (2 x X1 + X0
set
R 0.8 x (2 x R1 + R0
set
X 0.5 x (2 x X1 + X0
set
R 0.5 x (2 x R1 +R0
set
X 0.85 x RFPG x tan(LdAngle)
R 0.85 x RFPG
X RLdFwd x tan(LdAngle)
R RLdFwd
X 0
R RLdFwd
X -0.8 x R x tan( ArgDir)
min
R 0.8 x R
min
X -0.4 x R x tan( ArgDir)
min
R 0.4 x R
min
X 0.5 x (2 x X1 + X0
set
R -0.5 x (2 x X1 + X0
set
tan( ArgNegRes-90⁰)
X 0.8 x (2 x X1 + X0
set
R -0.8 x (2 x X1 + X0
set
tan( ArgNegRes-90⁰)
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 to figure
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Comments
)/3
set
)/3 +RFPG
set
)/3
set
)/3 + RFPG
set
If RLdFwd < 0.85 x RFPG
If RLdFwd < RFPG
If RLdFwd < RFPG
R = minimum of RFPG & RLdFwd
min
ArgDir = 15⁰ fixed
ArgNegRes = 120⁰ fixed
)/3
set
Formula applies if R Set value < RFPG
)/3 x
set
)/3 ArgNegRes = 120⁰ fixed
set
Formula applies if R Set value < RFPG
)/3 x
set
)/3
set
)/3
set
If RFPG < RLdFwd
1MRK 504 165-UUS Rev. J
GUID-3FA4B640-38E7-406E-8FCC-8DEDABB024C4 v5
Transformer protection RET670
Commissioning manual