Operating instructions
7SV512
V1
101
C53000---G1176---C91
6.6.3 Testing the end fault protection
The end fault protection is made effective. To
achieve this, the time T---ENDFAULT (address 1220)
must be set back to a definite value (not
1
), e.g. to
the default value 0.10 s.
One of the binary input functions for the breaker aux-
iliary contacts is energized (FNo 16 to FNo 20),
which is allocated to a binary input (e.g. INPUT 6 for
the conditions as delivered), preferably one that is
actually used.
In addition, the binary input function ”
>Start
” (FNo
70, INPUT 10) is energized.
Testing can be performed with single-phase, two-
phase or three-phase test current above the pick-up
value of the breaker failure protection (address
1202, 0.1
¡
I
N
when delivered). When testing single-
phase, the test current is injected via one phase and
earth.
Caution!
!
Test currents larger than 4 times I
N
may
overload and damage the relay if applied
continuously (refer to Section 3.1.1 for
overload capability). Observe a cooling
down period!
After expiry of the time T---ENDFAULT (address
1220, factory setting 0.10 s) the annunciation ”
BFP
TendFault
appears (FNo 514, not marshalled
when delivered). Check that the trip relay assigned
to the function ”
BFP TransTrip
(FNo 508, trip
relay 2 when delivered) closes its contacts.
It must be noted that the set times are pure delay
times; operating times of the measurement func-
tions are not included.
Switch off test current, de-energize all binary inputs.
6.6.4 Testing the circuit breaker pole
discrepancy supervision
For these tests the pole discrepancy supervision
must be configured as POLE DISCR =
EXIST
(ad-
dress 7838) during configuration (refer to Section
4.5.2) and switched on (address 3801 POLE---DISC
=
ON
).
One of the binary input functions for the breaker aux-
iliary contacts is energized (FNo 16, FNo 17, FNo 18,
or FNo20), which is allocated to a binary input (e.g.
INPUT 6 for the conditions as delivered), preferably
one that is actually used. The binary inputs assigned
to FNo 19 ”>
CB Aux. 3p
C
and FNo 70
”
>Start
must not be energized!
Testing can be performed with single-phase, two-
phase or three-phase test current above the pick-up
value of the breaker failure protection (address
1202, 0.1
¡
I
N
when delivered). When testing single-
phase, the test current is injected via one phase and
earth.
Caution!
!
Test currents larger than 4 times I
N
may
overload and damage the relay if applied
continuously (refer to Section 3.1.1 for
overload capability). Observe a cooling
down period!
After expiry of the time T---DISCREP (address 3802,
factory setting 2 s) three-pole trip command is given
by the pole discrepancy supervision. Check that the
trip relays assigned to the local trip ”
Pole-
Dis.Trip
(FNo 610, trip relays 3 to 5 when deliv-
ered) close their contacts.
It must be noted that the set times are pure delay
times; operating times of the measurement func-
tions are not included.
Switch off test current, de-energize all binary inputs.
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