KYORITSU 6016 User Manual
Page 33
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Protection by gG fuses
with Uo of 230V
Protection by MCBs with Uo of 230V
(Disconnection time 0.4 and 5s)
Rating
(A)
Disconnection
time 5s
Disconnection
time 0.4s
Characteristic
B
Characteristic
C
Characteristic
D
Ia
(A)
Zs
(Ω)
Ia
(A)
Zs
(Ω)
Ia
(A)
Zs
(Ω)
Ia
(A)
Zs
(Ω)
Ia
(A)
Zs
(Ω)
6
17
13.5
38
8.52
30
7.67
60
3.83
120
1.92
10
31
7.42
45
5.11
50
4.6
100
2.3
200
1.15
16
55
4.18
85
2.7
80
2.87
160
1.44
320
0.72
20
79
2.91
130
1.77
100
2.3
200
1.15
400
0.57
25
100
2.3
160
1.44
125
1.84
250
0.92
500
0.46
32
125
1.84
221
1.04
160
1.44
320
0.72
640
0.36
40
170
1.35
--
--
200
1.15
400
0.57
800
0.29
50
221
1.04
--
--
250
0.92
500
0.46
1000
0.23
63
280
0.82
--
--
315
0.73
630
0.36
1260
0.18
80
403
0.57
--
--
100
548
0.42
--
--
The most complete loop testers or Multifunction testers also have the Prospective Fault
current measurement. In this case, Prospective Fault current measured with instruments
must be higher than the tabulated Ia of the protective device concerned.
Below is a practical example of verification of the protection by MCB in a TN system
according to the international Standard IEC 60364.
Ω
L-PE
230
V
50.0Hz
L-PE
L-N
!
ATT:ON
Fig.25