Completing The Test; Breaker Failure Protection, Phase Segregated Activation And Output Ccrbrf; Function Revision History; Checking The Phase Current Operate Value, Ip - Hitachi RET670 Commissioning Manual

1MRK 504 165-UEN Rev. K
11.5.8.2

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.
11.5.9 Breaker failure protection, phase segregated activation and
output CCRBRF
Prepare the IED for verification of settings outlined in Section
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.
11.5.9.1

Function revision history

Document
revision
A
B
C
D
E
F
G
H
11.5.9.2 Checking the phase current operate value, IP>
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>.
Transformer protection RET670
Commissioning manual
Product History
revision
2.2.1 I>BlkCBPos setting functionality correction.
2.2.1 -
2.2.2 -
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.
2.2.3 -
2.2.4 -
2.2.4 -
2.2.5 -
If RetripMode = Off and FunctionMode = Current is set, only backup trip can be used
to check set IP>.
© 2017 - 2022 Hitachi Energy. All rights reserved
Testing functionality by secondary injection
"Preparing the IED to verify
GUID-3A043295-3AE3-437E-BBE9-D7FD6F349892 v2
Section 11
SEMOD53632-51 v5
M12104-2 v13
settings".
M12104-23 v14
171