Hitachi Relion 670 Series Commissioning Manual page 231
Line distance protection
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Also See for Relion 670 Series:
- Applications manual (438 pages) ,
- Commissioning manual (242 pages) ,
- Product manual (192 pages)
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1MRK506371-UUS Rev. M
1.
Inject the polarizing voltage 3V0, which is 5% of VBase (EF4PTOC, 51N67N) 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.
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 (85) 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.
10.
Switch the fault current and the polarizing voltage off.
11.
Reset the CR binary input and the BLOCK digital input.
11.11.5.3
Completing the test
Continue to test another function or end the test by changing the TESTMODE setting to Disabled.
Restore connections and settings to the original values, if changed for testing purposes.
11.11.6
Current reversal and weak-end infeed logic for residual
overcurrent protection ECRWPSCH (85)
Prepare the IED for verification of settings as outlined in section
for test"
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.
First, test the four step residual overcurrent protection function EF4PTOC (51N/67N) and then the current
reversal and weak-end infeed logic according to the corresponding instructions. Then continue with the
instructions below.
11.11.6.1
Testing the current reversal logic
Line distance protection REL670
Commissioning manual
No TRIP signal should appear, and the CS binary output should be activated.
No TRIP signal should appear.
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Testing functionality by secondary injection
"Requirements"
and section
Section 11
M13926-71 v5
M13936-2 v8
"Preparing
M13936-9 v7
225
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