9.
Reset the CR binary input.
10.
Activate the BLOCK digital input.
11.
Switch the fault current on (110% of the set operating current) and wait for a period longer than
the set value
tCoord
.
No TRIP signal should appear.
12.
Switch the fault current and the polarizing voltage off.
13.
Reset the BLOCK digital input.
Permissive scheme
M13926-42 v8
1.
Inject the polarizing voltage 3U0, which is 5% of
UBase
(EF4PTOC) where the current is
lagging the voltage by 65°.
2.
Inject current (65° lagging the voltage) into one phase at about 110% of the set operating
current, and switch the current off with the switch.
3.
Switch the fault current on, (110% of the set operating current) and wait longer than the set
value
tCoord
.
No TRIP signal should appear, and the CS binary output should be activated.
4.
Switch the fault current off.
5.
Activate the CR binary input.
6.
Switch the fault current on (110% of the set operating current) and measure the operating time
of the ECPSCH logic.
Use the TRIP signal from the configured binary output to stop the timer.
7.
Compare the measured time with the setting for
tCoord
.
8.
Activate the BLOCK digital input.
9.
Switch the fault current on (110% of the set operating current) and wait for a period longer than
the set value
tCoord
.
No TRIP signal should appear.
10.
Switch the fault current and the polarizing voltage off.
11.
Reset the CR binary input and the BLOCK digital input.
11.11.4.3
Completing the test
M13926-71 v5
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.
11.11.5
Current reversal and weak-end infeed logic for residual
overcurrent protection ECRWPSCH
M13936-2 v8
Prepare the IED for verification of settings as outlined in section
in this chapter.
Values of the logical signals for ECRWPSCH are available on the Local HMI under Main menu/Tests/
Function status/Scheme communication/ECRWPSCH(85)/ECRWPSCH:1.
The Signal Monitoring in PCM600 shows service values that are available on the Local HMI as well.
Section 11
1MRK 511 403-UEN Rev. L
Testing functionality by secondary injection
184
Bay control REC670
Commissioning manual
© 2017 - 2022 Hitachi Energy. All rights reserved
Содержание REC670
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