11.4.9.3
Checking the residual (earth fault) current operate value IN> set below IP>
M12104-80 v10
Check the low set
IN>
current where setting
FunctionMode
=
Current
and setting
BuTripMode
=
1 out
of 4
1.
Apply the fault condition, including START of CCRBRF, with a current just below set
IN>
.
2.
Repeat the fault condition and increase the current in steps until trip appears. Note that the
START signal shall be re-applied for each new current value.
3.
Compare the result with the set
IN>
.
4.
Disconnect AC and START input signals.
11.4.9.4
Checking the re-trip and back-up times
M12104-93 v12
The check of the set times can be made in connection with the check of operate values above.
Choose the applicable function and trip mode, such as
FunctionMode
=
Current
and
RetripMode
=
UseFunctionMode
.
1.
Apply the fault condition, including start of CCRBRF, well above the set current value. Measure
the time from START of CCRBRF.
2.
Check the re-trip
t1
and back-up trip times
t2
and
t3
.
In applicable cases, the back-up trip for multi-phase start
t2MPh
and back-up trip 2,
t2
and
t3
can also be checked. To check
t2MPh
, a two-phase or three-phase start shall be applied.
11.4.9.5
Verifying the re-trip mode
M12104-36 v6
Choose the mode below, which corresponds to the actual case.
In the cases below it is assumed that
FunctionMode
=
Current
is selected.
Checking the case without re-trip, RetripMode = Off
M12104-107 v8
1.
Set
RetripMode
=
Off
.
2.
Apply the fault condition, including start of CCRBRF, well above the set current value.
3.
Verify that no re-trip, but back-up trip is achieved after set time.
Checking the re-trip with current check, RetripMode = UseFunctionMode
M12104-48 v8
1.
Set
RetripMode
=
UseFunctionMode
.
2.
Apply the fault condition, including start of CCRBRF, well above the set current value.
3.
Verify that re-trip is achieved after set time
t1
and back-up trip after time
t2
.
4.
Apply the fault condition, including the start of CCRBRF, with the current below the set current
value.
5.
Verify that no re-trip, and no back-up trip is obtained.
Checking re-trip without current check
M12104-58 v10
1.
Set
RetripMode
=
Always
.
2.
Apply the fault condition, including start of CCRBRF, well above the set current value.
3.
Verify that re-trip is achieved after the set time
t1
, and the back-up trip after time
t2
.
4.
Apply the fault condition, including start of CCRBRF, with current below set current value.
5.
Verify that re-trip is achieved after set time
t1
, but no back-up trip is obtained.
Section 11
1MRK 511 403-UEN Rev. L
Testing functionality by secondary injection
100
Bay control REC670
Commissioning manual
© 2017 - 2022 Hitachi Energy. All rights reserved
Summary of Contents for REC670
Page 1: ...Relion 670 SERIES Bay control REC670 Version 2 2 IEC Commissioning manual ...
Page 2: ......
Page 28: ...22 ...
Page 54: ...48 ...
Page 60: ...54 ...
Page 66: ...60 ...
Page 90: ...84 ...
Page 212: ...206 ...
Page 218: ...212 ...
Page 232: ...226 ...
Page 240: ...234 ...
Page 241: ...235 ...