Hitachi Relion 670 Series Commissioning Manual page 230

Section 11
Testing functionality by secondary injection
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11.11.5.2 Testing the directional comparison logic function
Blocking scheme
1. Inject the polarizing voltage 3V0 at 5% of VBase (EF4PTOC, 51N67N) where the current is lagging
the voltage by 65°.
2. Inject current (65° lagging the voltage) in one phase at about 110% of the set operating current, and
switch the current off with the switch.
3. Switch the fault current on and measure the operating time of the communication logic.
Use the TRIP signal from the configured binary output to stop the timer.
4. Compare the measured time with the set value tCoord.
5. Activate the CR binary input.
6. Check that the CRL output is activated when the CR input is activated.
7. Switch the fault current on (110% of the set operating current) and wait longer than the set value
tCoord.
8. Switch the fault current off.
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.
12. Switch the fault current and the polarizing voltage off.
13. Reset the BLOCK digital input.
Permissive scheme
224
Product History
revision
2.2.2 -
2.2.3 -
2.2.3 -
2.2.3 -
2.2.4 -
2.2.4 -
2.2.4
2.2.5 Added separate DOs for teleprotection permissive (TxPrm & RxPrm1), blocking (TxBlk &
RxBlk1) and direct trip (TxTr & RxTr1) transmit and receive signals in accordance with 61850
Ed 2.0.
2.2.6 -
2.2.6 -
No TRIP signal should appear.
No TRIP signal should appear.
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1MRK506371-UUS Rev. M
M13926-7 v2
M13926-9 v6
M13926-42 v8
Line distance protection REL670
Commissioning manual