ABB RELION REB500 Operation Manual page 56

Section 6
Additional protection options
CLOSE
coil
command
IEC18000337 V1 EN-US
Figure 17:
50
Pick-up delay
11530_Isolator/
Breaker
t
position
CB "OPEN"
auxiliary contact
11505_Close Command CB
CB close
I > EFP setting
L1
I > EFP setting
L2
I > EFP setting
L3
14205_Block EFP
34215_Block EFP (CU)
14605_EFP ext release_1
Signal "14605_EFP ext release_1" configured?
14610_EFP ext release_2
Signal "14610_EFP ext release_2" configured?
1) EFP = end Fault
Typical setting 1.2 I when engineering scheme
The signal "EFP remote TRIP" is available for transfer tripping. Its duration
2)
can be set using the operator program under Settings/System response.
Block diagram of EFP with CTs on the line side
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0
&
EFP timer
0 (36 ms)
&
1)
1)
1
1)
EFP blocked
&
&
N
1MRK 505 400-UEN B
24805_EFP start
24305_EFP trip
44305_EFP trip (CU)
24105_EFP REMOTE TRIP
2)
Intertripping
pulsewidth
24405_EFP blocked
44405_EFP blocked (CU)
1
&
EFP enabled
1
14000029-IEC18000337-1-en.vsd
Distributed busbar protection REB500
Technical manual