Hitachi RED670 - Function Revision History; Single Ended Fault Locator

11.13.14.1 Function revision history
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Document
revision
Product
revision
History
A 2.2.1 -
B 2.2.1 -
C 2.2.2 -
D 2.2.3 -
E 2.2.3 -
F 2.2.4 -
G 2.2.4 -
H 2.2.4 -
J 2.2.5 Two ended based fault locator included. This update is valid for 2.2.5 release only.
11.13.14.2 Single ended fault locator
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Table 47: Test settings
Parameter Condition
I Higher than 30% I
r
Healthy conditions U = 63,5 V, I = 0 A & ZF = 0°
Impedance |Z| Test point
Note:
• Z
x
£ (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 current
Impedance angle ZF Test angle
• ZF arctan[(X0 + 2 · X1) / (R0 + 2R1)] For single-phase faults
• ZF arctan(X1/R1) For two-phase faults
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Measuring the fault distance
1. Set the test point (|Z| fault impedance and ZF impedance phase angle) for a condition that
meets the requirements in Table
47.
2. Subject the IED to healthy normal load conditions for at least two seconds.
3. Apply a fault condition.
4. Check the fault distance under disturbance records or function status.
Check that the distance-to-fault value displayed on the HMI complies with Equations
111, 112
and 113.
p
Z
x
X1
-------
100×=
EQUATION123 V1 EN-US (Equation 111)
in % for two-phase and three-phase faults
1MRK 505 378-UEN Rev. K Section 11
Testing functionality by secondary injection
Line differential protection RED670 247
Commissioning manual
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