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Section 11
Testing functionality by secondary injection
single phase current/voltage test set is available the test set should be connected to a selected
input for one phase current and voltage.
2.
Adjust the injected current and voltage to the set rated values in % of IBase and UBase
(converted to secondary current and voltage). The angle between the injected current and
voltage shall be set equal to the set direction Angle1, angle for stage 1 (equal to 0° for low
forward power protection and equal to 180° for reverse power protection). Check that the
monitored active power is equal to 100% of rated power and that the reactive power is equal to
0% of rated power.
3.
Change the angle between the injected current and voltage to Angle1 + 90°. Check that the
monitored active power is equal to 0% of rated power and that the reactive power is equal to
100% of rated power.
4.
Change the angle between the injected current and voltage back to Angle1 value. Increase the
current slowly from 0 until the START1 signal, start of stage 1, is activated. Check the injected
power and compare it to the set value Power1, power setting for stage 1 in % of Sbase.
5.
Increase the current to 100% of IBase and switch the current off.
6.
Switch the current on and measure the time for activation of TRIP1, trip of stage 1.
7.
If a second stage is used, repeat steps
11.5.13.2
Completing the test
Continue to test another function or end the test by changing the TESTMODE setting to Off. Restore
connections and settings to the original values, if changed for testing purposes.
11.5.14
Broken conductor check BRCPTOC
Prepare the IED for verification of settings as outlined in section
section
11.5.14.1
Function revision history
Document
revision
A
B
C
D
E
F
G
H
J
11.5.14.2
Measuring the operate and time limit of set values
1.
Check that the input logical signal BLOCK to the BRCPTOC function block is logical zero and
note on the local HMI that the output signal TRIP from the BRCPTOC function block is equal to
the logical 0.
2.
Set the measured current (fault current) in one phase to about 110% of the set operating
current IP>.
Observe to not exceed the maximum permitted overloading of the current circuits in the
terminal.
3.
Switch on the fault current and measure the operating time of BRCPTOC.
174
"Preparing for test"
in this chapter.
Product
History
revision
2.2.1
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2.2.1
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2.2.2
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2.2.3
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2.2.3
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2.2.4
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2.2.4
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2.2.4
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2.2.5
A fixed time delay of 50 ms is added before asserting START signal.
© 2017 - 2022 Hitachi Energy. All rights reserved
2
to
6
for the second stage.
"Requirements"
Line differential protection RED670
1MRK 505 378-UEN Rev. K
SEMOD175058-66 v4
SEMOD175021-3 v5
and
GUID-912F1AC6-6A15-49D7-8224-BC100CA1905A v1
SEMOD175021-7 v6
Commissioning manual
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