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what is the meaning of potential free contact.
difference between dry and wet contact?
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Answer Posted / sk
Potential free contacts (also called "dry contacts") are
simply contacts which are physically operated with the main
device, but not electrically connected to it. For example a
motor contactor often has auxiliary contacts that are
operated by the main coil and open and close at the same
time as the main contacts but are not used for control of
the motor starter. If they are connected to an outside
circuit to indicate the status of the starter without being
powered by the motor supply they would be considered
potential free contacts.
These type also called Signal-Contacts.
Read more:
http://wiki.answers.com/Q/What_is_potntial_and_potential_free_contact#ixzz1d6LFHY9N
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