2006-11-02 18:19:50 · 2 answers · asked by roopeesh123 1 in Education & Reference ➔ Standards & Testing
SAFETY! isolate operator from high powered circuits
WIRE SIZE! Can use smaller wires when running from operators panels to con troll panels.
COUNTABILITY! One switch can control many different operations automatically
Just to name a few! Don't know for sure what your professors is looking for or where you are at but will give you a place to start looking
2006-11-02 18:34:36 · answer #1 · answered by JUAN FRAN$$$ 7 · 0⤊ 0⤋
Because it gives you number of Normally closed and normally open contacts(Multiple circuit switching capability) and the control circuit is isolated from actual controlled circuit which may be power or communication or a different application.So isolation is available.
2006-11-03 02:26:31 · answer #2 · answered by Arun Frm Mumbai 2 · 0⤊ 0⤋