Kyoritsu 6016 Manual do Utilizador descarregar pdf (Página 33)

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

(A)

(Ω)

(A)

(Ω)

(A)

(Ω)

(A)

(Ω)

(A)

(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 tabu

lated 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

50.0Hz

L-PE

L-N

ATT

:ON

Fig.25

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 59 60

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Kyoritsu 6016 Manual do Utilizador Página 33

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