Circuit parameters

A project log for Mains protection box

Work more safely with mains power

yann-guidon-ygdesYann Guidon / YGDES 05/15/2019 at 01:250 Comments

Before powering it on for the first time, it's good to test all the parts and their connections, which is also a great opportunity to measure all the parameters :-)

Primary : 3 ohms, approx. 3.3 Henrys (disconnect the variac !)
Secondary : 4 ohms, approx. 3.8 Henrys (it seems to drift ???)

Between primary and secondary : > 2G ohms but 1.5nF...


The secondary is connected to quite a few things:

Let's see the incandescent bulbs : I measure the "cold" resistance

The variac is a different story, because it's variable...