The Change Over Switch I a
device used to switch off a power supply and subsequently switch on another
power supply. Basically it is aimed at switching on a more convenient power
supply to the load.
Since it switches on power to
the load, precautions has to be taken while choosing the type of Change Over
Switch, while selecting the appropriate size, the control of arcing has to be
put into consideration.
A good switch should be the one whose contact is made in
such a way as to limit the arc formation by having no contact-bounce and by
having contacts made of good conductive, corrosion resistance and wear
resistance materials.
A good change over switch must
have adequate insulation and must be so
constructed and located as not to constitute a potential hazard.
A good change over switch should also have tight contact
points so as to limit or eliminate the possibility of partial contact at the
contact point. The partial contact leads to over heating of the components and
may lead to fire outbreak in the entire room.
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