16
Air Circuit Breakers
BT2 series
Ir1
0.4
1
1.5
3
10
15
0.01
0.02
0.1
0.2
1
10
100
1000
10000
t (s)
0.3
0.4
I
r1
t
1
long-time delay curve
I
r2
I
2
T ON
I
2
T OFF
Instantaneous curve
t
2
Short-time delay curve
Instantaneous range
Illustrational curve
The range of long-time delay
I
r1
=(0.65~1)In
t
1
=15s~480s
The range of short-time delay
I
r2
=(1.5~10)I
r2
+OFF
t
2
=0.1s~0.4s
Instantaneous range
I
r3
=(3~15)I
r1
+OFF
Characteristic curve
Characteristic curve of general l
2
t
• BT2-1600~BT2-6300
T/I (time / current) curve of type L25 intelligent controllers (OCR)
