Measuring The Operate Limit - ABB Relion 670 Series Commissioning Manual

1MRK 504 165-UEN E
The Fault locator function LMBRFLO depends on other functions to work properly, that is,
phase selection information from distance protection function and analog information
supplied by the trip value recorder function. Check that proper binary start and phase
selection signals are connected and voltage and current signals are configured (parameter
settings).
The result is displayed on the local HMI or via PCM600. Distances to faults for the last 100
recorded disturbances can be found on the local HMI under Main menu/Disturbance Records/
Disturbance #n(n = 1–100)/General Information
If PCM600 is used, the result is displayed on the recording list after upload, including loop
selection information.
Table 41:
Parameter
I
Healthy conditions
Impedance |Z|
Impedance angle ZF
11.13.5.1

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 table 41.
2. Subject the IED to healthy normal load conditions for at least two seconds.
3. Apply a fault condition.
Check that the distance-to-fault value displayed on the HMI complies with equations 121,
122
p
EQUATION123 V1 EN-US
in % for two- and three-phase faults
p
EQUATION124 V1 EN-US
in % for single-phase-to-earth faults
Transformer protection RET670
Commissioning manual
Test settings
Condition
Higher than 30% I
U = 63,5 V, I = 0 A & ZF = 0°
Test point
Note:
•
•
•
Test angle
•
•
and 123
Z
x
×
------ - 100
=
X1
×
3 Z
= ×
x 100
+ ×
X0 2 X1
© Copyright 2017 ABB. All rights reserved
r
Z £ (X0 + 2 · X1)/3 For single-phase faults
x
Z £ X1 For three and two phase faults
x
Z £ (X0 + 2 · X1 XM)/3 For single-phase fault with mutual zero-
x
sequence current
ZF arctan[(X0 + 2 · X1) / (R0 + 2R1)] For single-phase faults
ZF arctan(X1/R1) For two-phase faults
Testing functionality by secondary injection
(Equation 121)
(Equation 122)
Section 11
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