11.4.8.2
Completing the test
SEMOD53632-51 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.
11.4.9
Breaker failure protection, phase segregated activation and
output CCRBRF
M12104-2 v13
Prepare the IED for verification of settings outlined in Section
"Preparing the IED to verify settings"
The Breaker failure protection, 3-phase activation and output function CCRBRF should normally be
tested in conjunction with some other function that provides a start signal. An external START signal
can also be used.
To verify the settings in the most common back-up trip mode
1 out of 3
, it is sufficient to test phase-
to-earth faults.
At mode
2 out of 4
the phase current setting,
IP>
can be checked by single-phase injection where the
return current is connected to the summated current input. The value of residual (earth fault) current
IN set lower than
IN>
is easiest checked in back-up trip mode
1 out of 4
.
11.4.9.1
Function revision history
GUID-3A043295-3AE3-437E-BBE9-D7FD6F349892 v2
Document
revision
Product
revision
History
A
2.2.1
I>BlkCBPos
setting functionality correction.
B
2.2.1
-
C
2.2.2
-
D
2.2.3
Setting
StartMode
is added to choose how retrip and backup trip timers are run. The
choices are; to run the timers by external start signal which is latched, to follow the
external start signal only or to follow the external start signal and the selected
FunctionMode
.
E
2.2.3
-
F
2.2.4
-
G
2.2.4
-
H
2.2.5
-
11.4.9.2
Checking the phase current operate value, IP>
M12104-23 v14
BuTripMode
=
1 out of 3
or
2 out of 4
.
1.
Apply the fault condition, including START of CCRBRF, with a current below the set
IP>
.
2.
Repeat the fault condition and increase the current in steps until a trip occurs. Note that the
START signal shall be re-applied for each new current value.
3.
Compare the result with the set
IP>
.
If
RetripMode
=
Off
and
FunctionMode
=
Current
is set, only backup trip can be used
to check set
IP>
.
1MRK 511 403-UEN Rev. L
Section 11
Testing functionality by secondary injection
Bay control REC670
99
Commissioning manual
© 2017 - 2022 Hitachi Energy. All rights reserved
Summary of Contents for REC670
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