Completing The Test; Overcurrent Protection With Binary Release Brptoc; Function Revision History; Measuring The Operate Limit Of Set Values - Hitachi RED670 Commissioning Manual

Section 11
Testing functionality by secondary injection
6. Switch on the fault current (110% of the setting).
No TRIP signal should appear.
7. Switch off the fault current.
8. For a short while inject a current (fault current) in same phase to about 90% of the set
operating current, and switch the current off.
9. Switch the fault current on.
No TRIP signal should appear.
10. Switch off the fault current.
11. Reset the RELEASE binary input.
12. Switch the fault current on.
No TRIP signal should appear.
13. Switch the fault current off.
11.5.9.3

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.
11.5.10

Overcurrent protection with binary release BRPTOC

Prepare the IED for verification of settings outlined in Section
Logical signals for BRPTOC protection are available on the local HMI under Main menu /
Settings /IED Settings /Current protection /OvercurrBinRel (50, 3I>) /BRPTOC (50, 3I>):x .
The Signal Monitoring in PCM600 shows the same signals that are available on the local HMI.
11.5.10.1

Function revision history

Document
revision
A
B
C
D
E
F
G
H
J
11.5.10.2

Measuring the operate limit of set values

1. Check that the input logical signals BLOCK and BLKTR and the output logical signal TRIP are
all logical zero.
2. If required, activate the input RELEASE on the BRPTOC function block.
3. Set MeasType to DFT for overcurrent operation.
4. For a short while inject a current (fault current) in phase L1 to about 110% of the set operating
current I>, and switch the current off.
Observe to not exceed the maximum permitted overloading of the current circuits in the IED.
5. Switch the fault current on and observe that STL1 and START appears. Also, measure the
operating time of BRPTOC.
170
Product History
revision
2.2.1 -
2.2.1 -
2.2.2 -
2.2.3 -
2.2.3 -
2.2.4 -
2.2.4 -
2.2.4 -
2.2.5 New function release
© 2017 - 2022 Hitachi Energy. All rights reserved
1MRK 505 378-UEN Rev. K
GUID-EB5AEFC4-6F51-4E1E-8055-4FEC53CA81FD v3
"Preparing the IED to verify
GUID-23898A65-D896-479E-9122-E8D9D6CC4FEB v1
GUID-4FF9AAC6-04B7-4A26-9093-C199C0C50540 v4
Line differential protection RED670
Commissioning manual
M14922-50 v4
settings".