Table 23: Test points to measure the boundary of a measuring zone in primary ohms
Test point R X Comment
P1 0
XFw
P2
RFw XFw
P3 (0.8 ∗
RFw
) +
RFFwZx
0.8 ∗
XFw
P4 0.8 ∗
RFFwZx
0.8 ∗
RFFwZx
∗
tan(
ArgLd
)
P5
RLd
0
P6
RFFwZx
0 If LEModeZx = Off
P7 0.5 ∗
RLd
0.5 ∗
RLd
∗
tan(
ArgDir
)
P8 0.5 ∗
RFRvZx XFw
P9 0.8 ∗
XFw
∗
tan(
ArgNegRes
)
0.8 ∗
XFw
4. Change the magnitude and angle of voltage to achieve impedances at test
points P1, P2,...,.P9.
5. The test points P7 and P9 are intended to test the directional lines of
impedance protection and are used to find the directional accuracy.
6. For each test points, observe that the start output signals, START, STZx and
STNDZx are activated.
7. Trip signals TRIP and TRZx appears after a set delay time of tZx.
Completing the test
GUID-5C822F5B-16A3-41A4-8586-53D2A4D3719E v1
Continue to test another function or end the test by changing the TESTMODE
setting to Off. Restore connections and settings to their original values, if they were
changed for testing purposes.
10.4.4 Underimpedance protection for railway transformers
ZGTPDIS
GUID-2DE57C53-0D98-4C7D-83F4-FEA15C369A55 v2
Prepare the IED for verification of settings outlined in Section
"Preparing the IED
to verify settings".
Values of the logical signals for ZGTPDIS are available on the local HMI under
Main menu/Tests/Function status/Impedance/ZGTPDIS (21T, Z<)/
ZGTPDIS:x, where x = 1, 2. The Signal Monitoring in PCM600 shows the same
signals that are available on the local HMI.
10.4.4.1 Verifying the signals and settings
GUID-9545E35A-2419-4353-8165-97329B804BB3 v2
Keep the current constant while measuring operating characteristics. Keep the
current as close as possible to its rated value or lower. However, make sure it is
higher than set minimum operating current.
1MRK 506 377-UEN C Section 10
Testing functionality by secondary injection
Railway application RER670 2.2 IEC 101
Commissioning manual
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