As you already know, reliable overcurrent protective devices, such as fuses and circuit breakers, prevent or minimize costly damage to transformers, conductors, motors, equipment, and the other many components and… Read more
Jul 31, 2017 | Edvard
The protection of shunt capacitor banks against internal faults involves several protective devices in a coordinated scheme. Typically, the protective elements found in a shunt capacitor banks (SCB) for internal… Read more
Jul 26, 2017 | Edvard
The National Electrical Code (NEC) covers grounding and bonding in several articles, but the primary coverage is in Article 250. Typical commercial electrical systems are grounded systems. Within the system,… Read more
Jul 21, 2017 | Edvard
Let’s take an example of electrical circuit design. A consumer lives in a bungalow with a detached garage and workshop, as shown in Figure 1. The building method is traditional… Read more
Jul 19, 2017 | Edvard
Ferroresonance is a non-linear resonance phenomenon that can affect power networks. The abnormal rates of harmonics and transient or steady state overvoltages and overcurrents that it causes are often dangerous… Read more
Jul 17, 2017 | Edvard
Choice of system earthing affects not only dependability (in the largest sense) but also installation, in particular with respect to the low voltage switchgear to be implemented. The three system… Read more
Jul 05, 2017 | Edvard
Low voltage networks, unless a replacement uninterruptible power supply (with galvanic insulation) or a LV/LV transformer is used, are influenced by MV. This influence takes the form of: capacitive coupling, galvanic… Read more
Jun 30, 2017 | Edvard
Synchronisers are required at points on a power system where two supplies (either generator and grid, or two grid supplies) may need to be paralleled. They are more than just… Read more
Jun 26, 2017 | Edvard
All home electrical systems must be bonded and grounded according to code standards. This entails two tasks: First, the metal water and gas pipes must be connected electrically to create… Read more
Jun 19, 2017 | Edvard
It’s always a good idea to put the sparks into your memory and shed light on things you have learned years ago. Whether you are a rookie in a field… Read more
Jun 07, 2017 | Edvard
