ABB RED670 Commissioning Manual page 265

1MRK 505 378-UUS Rev. J
Table 46:
Parameter
I
Healthy conditions
Impedance |Z|
Impedance angle ZF
11.13.13.3 Measuring the operate limit
1. Set the test point (|Z| fault impedance and ZF impedance phase angle ) for a condition that meets
the requirements in
2. Subject the IED to healthy normal load conditions for more than the prefault recording time in
DRPRDRE function.
3. Apply a fault condition.
Check that the distance-to-fault value displayed on the HMI complies with
110
p
EQUATION123 V1 EN-US
in % for two- and three-pole faults
p
EQUATION124 V1 EN-US
in % for single-phase-to-ground faults
p
EQUATION125 V1 EN-US
in % for single-phase-to-ground faults with mutual zero sequence current.
Where:
p
Z
Table continues on next page
Line differential protection RED670
Commissioning manual
Test settings
Condition
V = 69.3 V, I = 0 A & ZF = 0°
Test point
Note:
•
•
•
Test angle
•
•
Table 46.
and Equation 111
Z
x
×
------ - 100
=
X1
×
3 Z
= ×
x 100
+ ×
X0 2 X1
×
3 Z
x
-------------------------------------------- - 100 ×
=
× ±
X0 2 X1 XM +
= the expected value of a distance to fault in percent
= set test point on the test set
x
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£ (X0 + 2 · X1)/3 For single-phase faults
Z
x
£ X1 For three and two phase faults
Z
x
£ (X0 + 2 · X1 XM)/3 For single-phase fault with mutual zero-sequence
Z
x
current
ZF arctan[(X0 + 2 · X1) / (R0 + 2R1)] For single-phase faults
ZF arctan(X1/R1) For two-phase faults
Section 11
Testing functionality by secondary injection
Equation 109, Equation
(Equation 109)
(Equation 110)
(Equation 111)
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