Operating instructions7SV512
V1
101C53000---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.
Oneofthe binary inputfunctions forthe 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 isinjected viaone 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 offtest current, de-energize allbinary 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).
Oneofthe binary inputfunctions forthe breaker aux-
iliary contacts isenergized (FNo16, FNo17, FNo18,
or FNo20), which is allocated to a binary input (e.g.
INPUT 6 for the conditions as delivered), preferably
onethat isactually used. Thebinary inputsassigned
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 isinjected viaone 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 isgiven
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 offtest current, de-energize allbinary inputs.
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