Fuji Electric BT2 Series, Manual

Page: 21 / 65

21
Air Circuit Breakers
BT2 series
0.2 0.8 10 100 1
In
0.1
1
100
1000
10000
t (s)
200
10
t
C1
I
LC1
t
C2
I
LC2
I
LC1
=(0.2~1)In
t
C1
=t
1
/2(t
1
=15, 30, 60, 120, 240, 480s)
I
LC2
=(0.2~1)In
t
C2
=t
1
/4(t
1
=15, 30, 60, 120, 240, 480s)
I
LC2
≤ I
LC1
Characteristic curve
• T/I (time / current) curve of type M25, M26, H26, P25 and P26 intelligent controllers (OCR) for load-monitoring pattern one.