Circuit Breakers and Trip Curves (5 - Electricity Distribution)

How long does it really take a circuit breaker to trip? Let's learn about trip curves (Type B, for example) and time how long it really takes a typical breaker to trip. We'll also learn the difference between a 1-pole and 2-pole breaker.

Full edX course with interspersed practice problems to help you learn:

Aaron Danner is a professor in the Department of Electrical and Computer Engineering at the National University of Singapore.

Video filmed and edited by Cheryl Lim.
@randomcheryl

[doldrmaster]

One of my favorite channels, thank you for your work! Very insightful

[lapub.]

C curve is the standard for house in France, maybe because in France a ground fault is limited by the ground rod (TT) while in Britain or US it's more like a direct short with the TN system.
And all installation have a sealed device that is a 500 ma RCD + breaker installed by the public grid after the meter.
This device is delayed to allow downstream RCD to trip and clear the fault on the circuit without an house blackout.
Even if it's capable to trip for over amping as the smart meter include a switch that kill the power if you go over your subscription, it's more a redundancy, and if the breaker fail there is "plain good old fuses" sealed too before the meter. Fuses may look dumb but they just can't fail to cut the circuit at last resort !

[knm]

What is considered a high current level for electronic/computer equipment?