tp & n isolator

[xesemesa666]

Where and why is the tp & n isolator used?

 

[delmel]

TPN isolator exactly what it says. Basic terminology

A Big Swicth to isolate a three phase supply. Could be used for manythings, but all its doing is turning of the outgoing power from the switch.
Often seen in machine workshops

 

[Big_Spark]

Rather simplified answer from delmel there.

Any Isolator that breaks, simultaneously, all incoming Phase conductors and the incoming Neutral conductor is a TP&N Isolator. This should not be confused with a TP Isolator that will only nreak the incoming Phases.

The TP&N variety are used for all three phase supplies that incorporate a neutral, usually as a main switch on 3 phase distribution boards, but other 3 phase equipment that require a neutral will usually have a TP&N at their incoming point.

Motors, contrary to what Delmel said, do not usually have TP&N Isolation as 3 phase motors do not require a neutral, so they will have a TP Isolator, if they incorporate some device that requires a neutral then it is possible it may have one, but this is very rare indeed. Usually devices requiring a Neutral have seperate single phase (230V) supplies as this equipment is ancillery to the main motor, although some such equipment may have been designed to operate across phases at 400V as well.

These are not Items that any DIYer should even contemplate touching in their wildest fantasy of competence as 400V shocks are usually fatal, and if wiring mistakes are made, phase to phase faults are similar to hand grenades detonating and do kill anyone within a few feet, blow boards of walls and start fires, these are not the things that may happen, all will happen in a phase to phase fault.

If you have any doubts about a 400V supply, call in a professional, this is not DIY work.

 

[xesemesa666]

tHIS ISOLATOR IS IT CONNECTED DIRECTLY IN THE MACHINE, OR IS THERE A SOCKET IN BETWEEN THEM?

 

[ban-all-sheds]

xesemesa666, coming here asking random questions as they occur to you is not the way that you are going to properly learn what you need to know to gain your diploma.

You should be using proper text books, attending lectures and asking your lecturer(s) these questions....