Technology

ABB MCB
Science Technology
How does an MCB work?
This excerpt from ABB introduces the technology inside and miniature circuit breaker (MCB). What does an MCB do? The short answer: it protects wires from overloads and short-circuits. When we look on the inside of an MCB we can see how that actually works. For overload protection the temperature of a bimetal, through which the current passes (yellow area), is decisive. If the nominal current—the current the circuit breaker is…
Example of unfused spur
Design & Installation Technology
Connecting equipment to a socket-outlet circuit
This article provides guidance on how to connect items of equipment to socket-outlet circuits. Socket-outlets are typically supplied by either a ring or a radial final circuit. In either case, a number of items of permanently connected equipment may also be supplied by the circuit. Such equipment should preferably be of a rating not exceeding 2 kW. The choices available to the electrician for connecting items of equipment to socket-outlet…
Schneider circuit protection
Design & Installation Featured Technology
What is circuit protection?
Circuit protection, at its simplest, is the intentional addition of a ‘weak link’ in an electrical circuit. This link will be broken in the event of a fault – whether that’s high temperature, excessive current or a short circuit in a conductor, thus protecting the electrical circuit it’s part of from damage. Why are circuit protective devices important? Protective devices are important because they ensure that under fault conditions, a…