The Complete Guide to MCBs - Miniature Circuit Breakers

It's essential to keep our electrical installations safe and secure. In this learning module we'll explore how Miniature Circuit Breakers (MCBs) can provide protection, as well as what kind of MCB is best for your application.

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Also in this series the complete guide to RCDs
👉    • The Complete Guide To RCDs - Residual...  

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00:00 Minature Circuit Breakers - training
01:00 What types of fault to we need to protect against
03:25 How do minature circuit breakers work?
04:33 Overload protection
06:05 Fault protection
08:57 Nominal current
09:45 MCB types - B,C,D
10:10 Looking at the difference between type B & C MCBs
13:20 Problems with in-rush currents
14:25 Earth loop impedance and MCBs
17:15 Cmin correction factor
18:30 EN60928 manufacturer limits
20:16 Selecting the correct type of MCB
21:59 MCB Short circuit rating (Icn)
23:50 Prospective short circuit current
24:10 Service current Ics
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