Measuring The Operate Limit - ABB Relion 670 Series Commissioning Manual

Section 11
Testing functionality by secondary injection
Table 24: Test settings
Parameter
I
Healthy conditions
Impedance |Z|
Impedance angle ZF
11.12.5.1

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 24.
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 41,
42
p
EQUATION123 V1 EN-US
in % for two- and three-phase faults
p
EQUATION124 V1 EN-US
in % for single-phase-to-earth faults
p
EQUATION125 V1 EN-US
in % for single-phase-to-earth faults with mutual zero sequence current.
Where:
p
Z
X0
X1
XM
178
Condition
Higher than 30% I
U = 63,5 V, I = 0 A & ZF = 0°
Test point
Note:
•
•
•
Test angle
•
•
and 43
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
= set zero-sequence reactance of a line
= set positive-sequence reactance of a line
= set mutual zero-sequence impedance of a line
© 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
1MRK 511 403-UEN E
M14955-48 v5
(Equation 41)
(Equation 42)
(Equation 43)
Bay control REC670
Commissioning manual