Max ZS for BS60947-2...?

[sythai]

Trying to find this in the regs (got my doubts)...? Anyone help me out please..?

Many Thanks,

Sy

 

[nickblake]

Bs 60947 is a switch / isolator there is no Zs for it ,Zs youll find for overcurrent protective devices

 

[sythai]

Ok thankyou.... whoops, will re check, think I must have written down wrong BS number!!

 

[nickblake]

number is normally used on the main switch in the dist board it is listed as an over current device on page 73 432.4 ,its actually listed as isolation and switching table 53.2

 

[sythai]

What it is... got a submain and this is the isolation for it - there is a 100A main switch and next to it 80A mcb, I'm sure I wrote this number down from from MCB? Got to go back next week so will re check?

 

[nickblake]

MCB's are normally 60898 or the earlier ones are bs 3871 so if its isolation a sub main it will be a main switch ,good to check they are listed as over current devices but ill be honest ive not come across an MCB with that number

 

[lamb]

IIRC bsen 60947-3 is a switch disconnector.
bsen 60947-2 is a MCCB

 

[sythai]

Is there a max Zs for an MCCB then, is it the same an MCB ?

Trying to fill out test sheet, but not sure what to put for max tabulated Zs?

 

[Guest123]

Lamb is correct, a -3 is a main switch plain and simple, and a -2 is a moulded case circuit breaker.

You may need to consult the manufaturers for any applicable info as it's not in the regs.

A quick google may throw up some tech info for you.

 

[sythai]

cheers guys... done a google and looks like a common question... and answer seems to be to refer to manafacturer.

Was crappy basics one I think so will try and get in touch with them.

Sy

 

[nickblake]

Oh what a Donkey of course it is an MCCB where the wall my heads on its way to it