ABB CI830 3BSE013252R1 Fieldbus communication interface
Software modules
Station level functions
(Applicable for nominal frequencies of 50, 60 and 16.7 Hz)
Table 16 Busbar protection (87B)
Min. fault current pick-up setting (Ikmin)
Neutral current detection
500 to 6000 A in steps of 100 A
100 to 6000 A
Stabilizing factor (k) 0.7 to 0.9 in steps of 0.05
Differential current alarms
current setting
time delay setting
5 to 50% x Ikmin in steps of 5%
2 to 50 s in steps of 1 s
Isolator alarm
time delay 0.5 to 90 s
Typical tripping time 20 to 30 ms at Idiff/Ikmin 5 incl. tripping relays; for fN = 50, 60 Hz
30 to 40 ms at Idiff/Ikmin 5 incl. tripping relays; for fN = 16.7 Hz
CT ratio per feeder 50 to 10 000/1 A,
50 to 10 000/5 A, adjustable via HMI
Reset time 30 to 96 ms (at 1.2 <Ik/Ikmin <20); for fN = 50, 60 Hz
45 to 159 ms (at 1.2 <Ik/Ikmin <20);for fN = 16.7 Hz

Table 17 Breaker failure protection (50BF)
Measurement:
Setting range 0.1 to 2 x IN in steps of 0.1 x IN
Accuracy ±5%
Timers:
Setting range for timers
t1:
t2:
10 to 5000 ms in steps of 10 ms
0 to 5000 ms in steps of 10 ms
Accuracy ±5%
Remote trip pulse 100 to 2000 ms in steps of 10 ms
Reset ratio typically 80%
Table 18 End-fault protection (51/62EF)
Timer setting range 100 to 10,000 ms in steps of 100 ms
Current setting range 0.1 to 2 x IN in steps of 0.1 IN
Reset ratio 95%
Reset time 17 to 63 ms (at 1.2 <I/Isetting <20); for fN = 50, 60 Hz
Table 19 Overcurrent protection (51)
Characteristic definite time
Measurement:
Setting range 0.1 to 20 x IN in steps of 0.1 x IN
Setting range time delay 10 ms to 20 s in steps of 10 ms
Reset ratio typically 95%
Reset time 20 to 60 ms (at 1.2 <I/Isetting <20); for fN = 50, 60 Hz