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Discuss 60947 Zs VALUE S in the UK Electrical Forum area at ElectriciansForums.net
Silence must mean there is a frantic search for the correct answer. Lol!
I don't have to look up or search. An MCB cannot conform to the requirements of 60947-2, and 60947-2 do not have MCB type standardised tested time/current tripping curves.
I await spark 68's picture with interest!!
I don't have to look up or search. An MCB cannot conform to the requirements of 60947-2, and 60947-2 do not have MCB type standardised tested time/current tripping curves.
I await spark 68's picture with interest!!
Technically correct E54, they are known as MCCB
The 60947-2 standard is a lot deeper though, it covers low voltage circuit breakers up to and including ACBs, the Beamer Guide just classifies them as "Low Voltage Circuit Breakers"
I don't own the standard, Net Blind Paul is the Standards guru on here.
I have here in my Possession an ABB 16A "MCB" that complies to 60947-2, it is a DPSN type that has a "C curve", it also has provisions for auxiliaries to be fitted.
Ps. will post a picture later on, my phone takes cr*p pictures, I will have to wait for my camera to charge lol
Provision for additional auxiliaries such as modules via a side operated mechanical connection containing shunt trip, N/O N/C contacts etc, etc, that can be operated by the MCB or trip the MCB.What do you mean by provisions for auxiliaries?
Okay then if the curve is fixed then use
230/(In X Type multpier) = A
A X 0.8 = max Zs
And if to amd3 multiply again by Cmin
C type multiplier worst case is X 10
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