Measuring The Operate Limit; Completing The Test; Limit Counter L4Ufcnt - ABB Relion 670 Series Commissioning Manual

Section 11
Testing functionality by secondary injection
11.13.5.3

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
Equation 109
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
11.13.5.4

Completing the test

Continue to test another function or end the test by changing the
Restore connections and settings to the original values, if changed for testing purposes.
11.13.6

Limit counter L4UFCNT

The Limit counter function L4UFCNT can be tested by connecting a binary input to the counter
and applying pulses to the counter. The speed of the pulses must not exceed the cycle time of
the function. Normally the counter will be tested when testing the function that the counter is
connected to, such as the trip function. When the function is configured, test it together with
the function that operates it. Trigger the function and check that the counter result
corresponds to the number of operations.
242
and Equation 110
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 Hitachi Power Grids. All rights reserved
Table 45.
1MRK 505 378-UEN Rev. H
Equation
(Equation 108)
(Equation 109)
(Equation 110)
TESTMODE setting to Off .
GUID-7EBDC372-3407-4577-8B9A-6AB1758A1F34 v2
Line differential protection RED670
Commissioning manual
M14955-48 v7
108,
M14955-84 v6