adiabatic equation

[m1ck_b87]

Right guys.

Adiabatic equation, I want to work out if the swa armourings are adequate enough for the circuit, now it's a sub main feed from main Db, do I use the maximum fault current from origin or pfc at sub board, also do I use the protective protecting sub board.

Look forward to your answers

 

[sparkymalarky]

http://www.electriciansforums.net/i...ons/28128-example-use-adiabatic-equation.html

That thread should sort ye out for tea time on a Friday

 

[ackbarthestar]

Right guys.

Adiabatic equation, I want to work out if the swa armourings are adequate enough for the circuit, now it's a sub main feed from main Db, do I use the maximum fault current from origin or pfc at sub board, also do I use the protective protecting sub board.

Look forward to your answers

Do you expect the fuse at the origin to protect the circuit or the fuse at the sub-main DB ?

IMO, you look upstream for MBC and downstream for OCP.

If you are going to use the SWA as a cpc then you'll need to know its R2 value and csa.
Someone has kindly provided a table on this forum

 

[m1ck_b87]

Fuse at the origin

 

[ackbarthestar]

I'll try again later .................

 

[m1ck_b87]

What does that mean