R-Series Trip Curves
B, C and D Trip
Less than 10A
120
60
40
20
Minutes
Minutes
B, C and D Trip
10A and higher
7200
3600
2400
1200
600
480
360
240
120
60
40
20
Tripping time t
2
1
40
20
10
5
Tripping time t
10
5
1
0.5
1
0.5
Seconds
0.05
0.01
B C
1
1.13 1.45
2
3
4
Multiple of Rated Current
D
Seconds
0.1
0.05
0.1
5 6 7 8 9 10 12 14 16 20
0.01
B C
1
1.13 1.45
2
3
4
Multiple of Rated Current
D
5 6 7 8 9 10 12 14 16 20
Temperature and Power Loss Specifications
Rated
current
of MCB
Internal Impedances & Power Loss
Internal
impedance
Power
loss on
CB
Maximum allowable
impedance of
breakdown loop (0.2/0.4s)
MCB T
emperature Compensation
E ective rated current allowing for ambient temperature.
I cor (A)
Z (m
Ω)
I
n
(A)
0.50
1.00
2.00
3.00
4.00
6.00
8.00
10.00
13.00
16.00
20.00
25.00
32.00
40.00
50.00
63.00
Char.
B,C,D
6600
1650
370
210
126
51
21
14.8
11.3
7.5
6.3
4.4
3.1
2.5
2.2
1.6
P (W)
Char.
B,C,D
1.7
1.7
1.5
1.9
2.0
1.8
1.3
1.5
1.9
1.9
2.5
2.8
3.2
4.0
5.5
6.4
Char.B
42.0
46.0
23.0
15.3
11.5
7.7
5.8
4.6
3.5
2.9
2.3
1.8
1.4
1.2
0.9
0.7
Z
s
(
Ω)
Char.C
51.1
25.6
12.8
8.5
6.4
4.3
3.2
2.6
2.0
1.6
1.3
1.0
0.8
0.6
0.5
0.4
Char.D
28.8
14.4
7.2
4.8
3.6
2.4
1.8
1.4
1.1
0.9
0.7
0.6
0.4
0.4
0.3
0.2
-20°C
0.61
1.21
2.42
3.63
4.84
7.30
9.70
12.1
15.7
19.4
24.2
30.3
38.7
48.4
60.5
76.2
-10°C
0.59
1.18
2.36
3.54
4.72
7.10
9.40
11.8
15.3
18.9
23.60
29.50
37.80
47.20
59.0
74.30
0°C
0.57
1.14
2.28
3.42
4.56
6.80
9.10
11.40
14.80
18.20
22.80
28.50
36.50
45.60
57.00
71.80
10°C
0.55
1.10
2.20
3.30
4.40
6.60
8.80
11.00
14.30
17.60
22.00
27.50
35.20
44.00
55.00
69.30
Ambient Temperature
20°C
0.53
1.05
2.10
3.15
4.20
6.30
8.40
10.50
13.70
16.80
21.00
26.30
33.60
42.00
52.50
66.20
30°C
0.50
1.00
2.00
3.00
4.00
6.00
8.00
10.00
13.00
16.00
20.00
25.00
32.00
40.00
50.00
63.00
40°C
0.47
0.93
1.86
2.79
3.72
5.60
7.40
9.30
12.10
14.90
18.60
23.30
29.80
37.20
46.50
58.60
50°C
0.44
0.88
1.76
2.64
3.52
5.30
7.00
8.80
11.50
14.10
17.60
22.00
28.20
35.20
44.10
55.50
60°C
0.83
1.67
2.50
3.33
5.00
6.70
8.30
10.80
13.30
16.70
20.80
26.70
33.30
41.70
52.50
0.42
Altech Corp.
®
• 35 Royal Road • Flemington, NJ 08822-6000 • P 908.806-9400 • F 908.806.9490 • www.altechcorp.com
67
ANNEX
Earth Leakage
Circuit Breakers
UL 1077
Equipment Breakers
UL 1077
UL 508
10
8
6
4
UL 489
ALTECH [ ALTECH CORPORATION ]
