'(& )( )'& &) ( &!& ")& &$(( $# Ć %&( $# #)" &&#$
6 - 19
Siemens AG ⋅ May 1998
The DC monitoring is performed for each measuring
system. The differential current is compared with the
set threshold . For the selective protection zones and
the check zone, a common limit can be parameteriĆ
zed.
Tripping is blocked, unless the measured value falls
below the limit within a fixed time. The status is indiĆ
cated. Blocking is maintained until the measured vaĆ
lue falls below the limit. (refer to chapter 4.7.8.7).
&&!% "$ #$"&&"! ! $'& $)
$ &%&
"
A
6 3 1 1 A U T O T E S T
= a c t i v e
Cyclic testing (refer to chapter 4.7.8.8)
= active
= inactive
Testing must be operative during normal service, disĆ
connection is only permissible for testing purposes.
"
A
6 3 1 2 T E S T F A U L T
= a l a r m o n l y
Response for pick-up of the cyclic tests
= alarm only
= block prot.
After failure clearance, the protection blocking can be
released via or the protection system is
reactivated by restart.
"
A
6 3 1 3 I < M A N T R I P
= . 0 5 I / I N
Current threshold for performing the circuit breaker
test (refer to chapter 4.7.5.1)
minimum setting: /
N
...........
maximum setting: /
N
...........
&&!% "$ & "($'$$!& $% "
& " ! "
Y
B
6 5 0 0 S E T T I N G S :
I > T r i p B a y 0 1 – 4 8 ?
This parameter prevents the trip signal to be issued
unless the current in the bay has exceeded the set
limit value.
The setting is referred to the respective CT ratios.
If "0" is set for a bay, then tripping occurs regardless
of bay current.
"
A
6 5 X X I > T R P B A Y X X
= . 0 0 I / I N
Current limit value for bay XX (01 to 48)
minimum setting: /
N
...........
maximum setting: /
N
..........
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