
1.
Set
RetripMode
=
CB Pos Check
.
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
1.
Set
RetripMode
=
No CBPos Check
.
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.
12.5.8.5
Verifying the back-up trip mode
In the cases below it is assumed that
FunctionMode
=
Current
is selected.
Checking that back-up tripping is not achieved at normal CB tripping
Use the actual tripping modes. The case below applies to re-trip with current check.
1.
Apply the fault condition, including start of CCRBRF, with phase current well
above set value
IP>
.
2.
Interrupt the current, with a margin before back-up trip time,
t2
. It may be made
at issue of re-trip command.
3.
Check that re-trip is achieved, if selected, but no back-up trip is obtained.
The normal mode
BuTripMode
=
1 out of 3
should have been verified in the tests
above. In applicable cases the modes
1 out of 4
and
2 out of 4
can be checked. Choose
the mode below, which corresponds to the actual case.
Checking the case
BuTripMode = 1 out of 4
It is assumed that the earth-fault current setting
IN>
is below phase current setting
IP>
.
1.
Set
BuTripMode
=
1 out of 4
.
2.
Apply the fault condition, including start of CCRBRF, with one-phase current
below set
IP>
but above
IN>
. The residual earth-fault should then be above set
IN>
.
3.
Verify that back-up trip is achieved after set time. If selected, re-trip should also
appear.
4.
Disconnect AC and START input signals.
Section 12
1MRK502053-UEN B
Testing functionality by secondary injection
162
Generator protection REG670 2.0 IEC
Commissioning manual
Содержание REG670 2.0 IEC
Страница 1: ...Relion 670 series Generator protection REG670 2 0 IEC Commissioning manual ...
Страница 2: ......
Страница 16: ...10 ...
Страница 30: ...24 ...
Страница 58: ...52 ...
Страница 62: ...56 ...
Страница 76: ...70 ...
Страница 90: ...84 ...
Страница 94: ...88 ...
Страница 108: ...102 ...
Страница 246: ...240 ...
Страница 252: ...246 ...
Страница 267: ...261 ...