PSCC/PFC

[Nordberg]

Experts please answer quickly, most appreciated.

Whats the difference between PSCC and PFC?

Theres no punch line to follow by the way!!!

Big big thanks in advance.

 

[pdcelec]

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

 

[Nordberg]

Is the PSSC measurement concerned with the distributors part only?

 

[pdcelec]

No. It is all equipment in the electrical installation. mcb's have the rating on them (usually expressed as M3, M7, M9 etc). Light switches etc all have a rating too

 

[Nordberg]

Just trying to get to grips with testing, please go in depth regarding these test's if you please.

Test cert is asking for two measurements PFC and PSSC.
What point in the installation are these test's done?

Have got a multifunction tester HT2000.

Muchas gratiass or something like that.

 

[pdcelec]

These are taken at the origin of the installation at the same point as Ze (and done at the same time). Some meters give you a direct reading. If the meter does not then

I = V/R

and substituting gives

PFC = V/Ze

 

[Nordberg]

Cheers my dears,

many thanks for prompt responce.

Why is abbreviation for Prospective Short Circuit Current PSSC?

 

[Jaymack]

Cheers my dears,

many thanks for prompt responce.

Why is abbreviation for Prospective Short Circuit Current PSSC?

Go on you're trying to wind us up!, P.O.

PSCC - Prospective Short Circuit Current

 

[Nordberg]

No wind up sorry.

pdcelec called it pssc and it is also called pssc on an example test cert i have obtained.

Thought i was losing my marbles for a while then pdcelec edited his reply.

Confusion now sorted thankyou.