ABB Relion 670 Series Commissioning Manual page 252

Section 11
Testing functionality by secondary injection
p
EQUATION125 V1 EN-US
in % for single-phase-to-ground faults with mutual zero sequence current.
Where:
p
Z
X0
X1
XM
11.13.5.2 Completing the test
continue to test another function or end the test by changing the
Restore connections and settings to their original values, if they were 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.
11.13.6.1 Completing the test
Continue to test another function or end the test by changing the Test mode setting to
Restore connections and settings to their original values, if they were changed for testing
purposes.
11.13.7 Through fault monitoring PTRSTHR (51TF)
Prepare the IED for verification of settings outlined in Section
settings".
11.13.7.1 Verifying the signals and settings
The voltage or current can be injected using a common test equipment.
246
×
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
1MRK 506 371-UUS E
TESTMODE setting to Disabled .
GUID-7EBDC372-3407-4577-8B9A-6AB1758A1F34 v2
GUID-325F040B-BADC-4281-B965-9B7D6BFA3E15 v2
GUID-7AE60CB5-3CD5-4FE2-8D54-664AA78DD2DE v1
GUID-079BCF22-469C-42EA-B857-E28154EC13D9 v1
"Preparing the IED to verify
GUID-0295EF7C-217E-4400-B7C2-68C00A38ADF3 v1
Line distance protection REL670
Commissioning manual
(Equation 108)
M14955-84 v6
Off .