Electrical Lectures
Superposition Theorem Used To Solve The Simple Network
Using Superposition theorem, find the current through the 2Ω resistor of the network of Figure 1 above. The presence of three sources will result in three different networks to be analyzed. Considering the effect of the 12-V source (Fig. 2):… Read more
Apr 30, 2016 | By Edvard Csanyi
Energy Efficiency
How To Reduce Transformer Losses At Design Stage
Design changes to reduce transformer losses, just as in a motor, always involve trade offs. For example, consider varying the cross-sectional area of the transformer core. An increase tends to lower no-load loss while raising the winding loss. An increase… Read more
Apr 29, 2016 | By Edvard Csanyi
Industrial Automation
Purpose And Applicable Processes Of a SCADA System
SCADA is the technology that enables a user to collect data from one or more distant facilities and to send limited control instructions to those facilities. It’s important to note the words “distant” and “limited” in this definition. SCADA has… Read more
Apr 27, 2016 | By Edvard Csanyi
Energy and Power
Features of 3 circuit protection devices (MCB, RCCB and RCBO) you have probably forgotten
Traditionally, fuses were the main devices chosen for final circuit protection, up until the 1970’s when circuit breaker technology started to become dominant. Today, the three principle circuit protection devices are: Miniature Circuit Breakers (MCBs), Residual Current Circuit Breakers (RCCBs)… Read more
Apr 25, 2016 | By Edvard Csanyi
Electrical Lectures
Electric Circuits? It’s All About Nodes, Branches, and Loops
Since the elements of an electric circuit can be interconnected in several ways, we need to understand some basic concepts of network topology. To differentiate between a circuit and a network, we may regard a network as an interconnection of… Read more
Apr 23, 2016 | By Edvard Csanyi
Energy and Power
What Would Be The Worst Type Of Three Phase Faults (And Why It Happens)
In a three phase power system, the type of faults that can occur are classified by the combination of conductors or buses that are faulted together. In addition, faults may be classified as either bolted faults or faults that occur… Read more
Apr 22, 2016 | By Edvard Csanyi
Energy and Power
3 Designs of DC Distribution Systems In Power Substations
The method of connection of the battery, battery charger, and DC distribution systems depends on the duty, the type or load, and whether the system needs to be duplicated or whether duplicate chargers are required. One typical example for a… Read more
Apr 20, 2016 | By Edvard Csanyi
Electric Motor
Two Basic Methods Used For Braking a Motor (DC Injection and Dynamic)
Two common basic methods used for braking a motor are DC injection braking and dynamic braking. We will look at both in detail, starting with electric braking. DC Injection Braking Dynamic Braking DC injection braking is a method of braking… Read more
Apr 18, 2016 | By Edvard Csanyi
Energy and Power
You can use water pipes for grounding purposes, but…
Water pipes have been used extensively in the past as a grounding electrode. Water pipe connections are not testable and are unreliable due to the use of tar coatings and plastic fittings. City water departments have begun to specifically install… Read more
Apr 16, 2016 | By Edvard Csanyi
Electrical Lectures
Why do we care so much about power factor correction?
Power factor, as every electrical engineer should know, is defined as the ratio of real power to volt-amperes and is the cosine of the phase angle between the voltage and current in an AC circuit. These are neatly defined quantities with sinusoidal… Read more
Apr 15, 2016 | By Edvard Csanyi
Electrical Lectures
AC versus DC. Those were the days…
Take warning! Alternating currents are dangerous. They are fit only for powering the electric chair :) The only similarity between an AC and a DC lighting system is that they both start from the same coal pile. And thus did… Read more
Apr 13, 2016 | By Edvard Csanyi
Power Quality
5 anomalies in AC power that can damage your home devices
In addition to lightning, there are a number of other disturbances that can come in on the AC power lines and damage equipment. Some surge protectors can reduce or eliminate damage from some of these perturbations. There is considerable confusion… Read more
Apr 11, 2016 | By Edvard Csanyi
Energy and Power
What would be the best conductor material for electrical wires and cables
The conductivity of copper is 65% higher than that of aluminium which means that the conductor size of similarly rated cables is proportionately smaller. Correspondingly less expense is then incurred in providing for insulation, shielding and armouring the cables themselves…. Read more
Apr 09, 2016 | By Edvard Csanyi
Electrical Lectures
What Is The Energy, But For Real?
Energy is best defined as “the capacity for doing work”. Electricity is but one of many forms of energy. Other familiar forms of or descriptions of energy are thermal or heat, light, mechanical, and so on. Energy is also described… Read more
Apr 08, 2016 | By Edvard Csanyi
Energy and Power
Power Measurement On Four-Wire System Using Wattmeter Methods
A four-wire system is suitable to supply unbalanced, three-phase loads or single phase loads distributed on all three phases of a low voltage installation. When measuring power on a three-phase system, it is really necessary to take into consideration the… Read more
Apr 06, 2016 | By Edvard Csanyi
