Whats PSC stand for and what is it?

[cairns]

Just wondering what it is, iv'e looked online and cant find it.

Cheers,

John

 

[Guest123]

PSCC - Prospective Short Circuit Current. Also known as PSC.

 

[mad frankie]

and pfc prospective fualt current

 

[telectrix]

short out L/N or L/E. then you've got PSC. can be painful!

 

[Jimmy Boy]

If your doing installs and testing them you would be wise to brush up in this area, as Lenny said it's PSSC, along side which you also measure the PEFC, Prospective Earth fault Current the highest of these recorded values is the PFC which is entered on the EIC expressed as kA

 

[accordfire]

If your doing installs and testing them you would be wise to brush up in this area, as Lenny said it's PSSC, along side which you also measure the PEFC, Prospective Earth fault Current the highest of these recorded values is the PFC which is entered on the EIC expressed as kA

LOL! Or as 30mA as I saw on one form handed to us recently!

Here's two pages giving further info:

Wikipedia

Posts on this forum about PSCC Calculation

 

[Jimmy Boy]

612.11 explains brb

 

[Jimmy Boy]

LOL! Or as 30mA as I saw on one form handed to us recently!

Here's two pages giving further info:

Wikipedia

Posts on this forum about PSCC Calculation

I does sometimes beg the question if the 6000 marking on a breaker is there just to make it aesthetically pleasing to the eye...

 

[Colin Integrale]

P.F.C.

Pan Fried Chicken.

Plain straight lovable.

 

[mad frankie]

If your doing installs and testing them you would be wise to brush up in this area, as Lenny said it's PSSC, along side which you also measure the PEFC, Prospective Earth fault Current the highest of these recorded values is the PFC which is entered on the EIC expressed as kA

sorry steve your right i should have been a bit more concise in my post

 

[cairns]

Cheers for all your answers-

so I have now established that:

PSCC = prospective short circuit current (L-N fault single phase L-L three phase)
PEFC = prospective earth fault current (L-E fault)
PFC = prospective fault current is the higher value obtained of the other two



What are the formulas for calculating these?

Why do we need to know what the PSCC and PEFC?



Thanks- John

 

[Jimmy Boy]

Cheers for all your answers-

so I have now established that:

PSCC = prospective short circuit current (L-N fault single phase L-L three phase)
PEFC = prospective earth fault current (L-E fault)
PFC = prospective fault current is the higher value obtained of the other two



What are the formulas for calculating these?

Why do we need to know what the PSCC and PEFC?



Thanks- John

You don't need to know them on an individual basis you need to measure both to obtain the highest reading= PFC. You need to know it to make sure the protective device(s) in an installation are capable of breaking the maximum fault current that may flow in a dead short scenario, there is a max for a 230v single phase installation the figure eludes me at the moment, someone will chirp up with it shortly I expect

 

[Jimmy Boy]

As a matter of interest have a look at the front of a breaker, you will see a figure in a box usually 6000 what do you think this tells you ?

 

[telectrix]

6000 is the number of wylex breakers recalled each month

 

[Jimmy Boy]

6000 is the number of wylex breakers recalled each month

*Spits tea all over keyboard *