ABB REL 551 2.3 Series - Page 110

104
Line differential protection (DIFL) &KDSWHU
9HULI\LQJVHWWLQJVE\VHFRQGDU\
LQMHFWLRQ
 :LWKWKHWHUPLQDOLQQRUPDORSHUDWLRQQRWLQ7HVWPRGHDQG
ZLWKWKHOLQHHQHUJLVHGWKH,
'LII/
,
'LII/
DQG,
'LII/
DUHPHD
VXUHGXQGHUWKHVHUYLFHUHSRUWPHQXZLWK&&&RPSWHPSRUDU\
VHWWR2IIDWERWKWHUPLQDOV7KHUHDIWHUPHDVXUHWKHYDOXHV
ZLWKWKH&&&RPSVHWWR2Q
Note! Setting CCComp to Off might cause the terminal to trip.
Therefore make sure that the trip outputs are blocked.
 &KHFNWKHFKDUJLQJFXUUHQWFRPSHQVDWLRQE\FRPSDULQJWKH
PHDVXUHG,
'LII/[
YDOXHV
The measured I
DiffLx
shall be near zero in each separate phase with
the CCC used.
 5HPRYHWKHH[WHUQDOEORFNLQJRIWKHWULSVLJQDOZKHQWKLVWHVW
KDVEHHQVXFFHVVIXOO\SHUIRUPHG
 &RPSOHWLQJWKHWHVW
Continue to test another function or complete the test by setting the test mode to off.