e997039.pdf

(21 KB) Pobierz

138908612 UNPDF

modified mains switch

039

a larger load than it was designed for. Normally, a relay is used for

these situations, but this has the disadvantage of needing an auxiliary

voltage for operating the relay.

The diagram shows that the wanted aim can also be achieved

by two thyristors instead of a relay, which has the advantage of not

requiring an auxiliary supply. The arrangement depends on the

leakage current of one thyristor firing the other. It is important

that the thyristors are sensitive types, otherwise there is a risk that

the setup does not work. The thyristors used in the prototype are

Type S0602MH from SGS-Thomson. These fire at an I GT as low as

200 µA and can switch currents of up to 3.8 A. For safety’s sake,

the fuse is rated at 2 A (slow). It hardly needs mentioning that the

switch must be a Class II approved type.

F1

S0602MH

K1

2A T

Th1

K2

230V

230V

S1

Th2

S0602MH

994021 - 11

H. Bonekamp

It sometimes happens that it is necessary for the contacts of a

mains switch to be isolated or for the switch to be able to handle

[994021]

138908612.019.png

138908612.020.png

138908612.021.png

138908612.022.png

138908612.001.png

138908612.002.png

138908612.003.png

138908612.004.png

138908612.005.png

138908612.006.png

138908612.007.png

138908612.008.png

138908612.009.png

138908612.010.png

138908612.011.png

138908612.012.png

138908612.013.png

138908612.014.png

138908612.015.png

138908612.016.png

138908612.017.png

138908612.018.png

Plik z chomika:

Inne pliki z tego folderu:

bge.jpg (22 KB)
detail1.htm (5 KB)
detail10.htm (6 KB)
detail12.htm (12 KB)
e991018.pdf (794 KB)

Inne foldery tego chomika:

Zgłoś jeśli naruszono regulamin