Arc Voltage, Recovery Voltage, Restriking Voltage, RRRV

We will discuss here in details the concept of Arc Voltage, Recovery Voltage, Restriking Voltage, RRRV Basic Concept of Arc Voltage, Recovery Voltage, Restriking Voltage, RRRV When contacts of a circuit breaker open under current carrying condition, electric arcs form in the gap between the contacts. This is due to ionization of the surrounding medium. … Read more

Greenhouse Effect of SF6 Gas and Alternative Gas of SF6

Lifespan and Environmental Impact of SF6 Gas SF6 can stay in the atmosphere up to 3200 years. So, the atmospheric life of SF6 gas is immense. You cannot see it, you cannot feel it, you cannot smell it. The global warming potential is currently 24,000 times more than \(CO_2\). What do I mean by global … Read more

Lightning Arrester – Gapless Metal Oxide (ZnO) Arrester

Why was the gapless ZnO lightning arrester developed over the valve-type lightning arrester? In a valve-type lightning arrester, we connect spark gaps in series with non-linear resistors. This is necessary because silicon carbide (SiC) has a relatively low non-linearity coefficient (α ≈ 5–7). As a result, the knee point in the V–I characteristic of an … Read more