Electrical Lectures
10 Important Definitions Applied To Low Voltage Fuses
The simplest of all overcurrent protective devices are fuses. A fuse is an overcurrent protective device with a circuit-opening fusible part that is heated and severed by the passage of the overcurrent through it. Let’s talk about ten important definitions that are… Read more
Oct 10, 2015 | By Edvard Csanyi
Energy and Power
Few things that capacitors do perfectly
Capacitors provide tremendous benefits to distribution system performance. Most noticeably, capacitors reduce losses, free up capacity, and reduce voltage drop. Let’s go a little bit into details. By canceling the reactive power to motors and other loads with low power… Read more
Oct 05, 2015 | By Edvard Csanyi
Energy and Power
Synchronizing Generator To The Grid
Having discussed the principles of synchronizing the generator to the grid, we will look briefly at the physical method of accomplishing it. In theory, there are at least two simple measurements or indications, which can be used for synchronizing a… Read more
Oct 02, 2015 | By Edvard Csanyi
Energy and Power
Substation AC Auxiliary Supply For Inessential Loads
The purpose of auxiliary power supply systems is to cater for the necessary energy for the operation of primary and secondary devices at the substation. The auxiliary power systems are normally divided in two categories, namely the AC system and… Read more
Sep 30, 2015 | By Edvard Csanyi
Energy and Power
Acceptable levels of distortion in the mains supply system
In the mains supply system, harmonic voltage distortion is the consequence of the flow of harmonic currents through the impedances in the power supply circuit connected to the converter. A typical power supply system at an industrial or mining plant… Read more
Sep 26, 2015 | By Edvard Csanyi
Energy and Power
Surge Protective Devices In TN Systems (Guide For Low Voltage Electricians)
For “protection against electric shock under fault conditions“ in TN systems, overcurrent and residual current devices have been approved. For the use of surge protective devices (SPDs) this means that these protective devices may only be arranged downstream of the… Read more
Sep 25, 2015 | By Edvard Csanyi
Energy and Power
Analysis of pole-mounted MV/LV transformer grounding
Let’s discuss in some detail the reasons for the grounding philosophy adopted for pole-mounted MV/LV transformer substations illustrated in Figure 0. Contents: LV grounding MV grounding Combined MV/LV grounding Separate MV/LV grounding MV electrode LV electrode Pole transformer basics (VIDEO)… Read more
Sep 23, 2015 | By Edvard Csanyi
Energy and Power
Substation DC Auxiliary Supply – Battery And Charger Applications
A power substation can have one or several DC systems. Factors affecting the number of systems are the need for more than one voltage level and the need for duplicating systems. Today, normal DC auxiliary supply systems in power substations are… Read more
Sep 21, 2015 | By Edvard Csanyi
Electrical Lectures
Voltage Drop Calculations For Engineers – Beginners
Voltage drop calculations using the DC-resistance formula are not always accurate for AC circuits, especially for those with a less-than-unity power factor or for those that use conductors larger than 2 AWG. Table 1 allows engineers to perform simple ac voltage drop calculations…. Read more
Sep 19, 2015 | By Edvard Csanyi
Energy and Power
Guidelines To Residential Room Lighting
Architects of development houses usually select the locations for switches, receptacles, and luminaires at a quality and price level determined by the builder. However, purchasers of architect-designed, custom-built homes usually have an opportunity to decide on the selection of luminaires… Read more
Sep 18, 2015 | By Edvard Csanyi
Energy and Power
4 Factors To Consider When Selecting a Sectionalizer
Sectionalizers are (beside overcurrent relays, reclosers and fuses) one of the most used for distribution system protection. A sectionalizer is a device that automatically isolates faulted sections of a distribution circuit once an upstream breaker or recloser has interrupted the… Read more
Sep 16, 2015 | By Edvard Csanyi
Energy and Power
6 Customer Requirements For a Generator Regarding Power Demand
To select an on-site engine/generator sets (gensets), you’ll need to determine the power demand requirements which must be met under operating conditions, of course. Let’s talk about six recognized customer genset requirements regarding power demand // On Site Power Requirement Load… Read more
Sep 12, 2015 | By Edvard Csanyi
Energy and Power
5 Steps To Safely Shutdown a Large Generator
Normally, units are removed from service through operator initiation of distributed control system (DCS) commands or turbine trip buttons that shutdown the prime mover. Closure of steam or fuel valves will then initiate anti-motoring or reverse power control circuits that… Read more
Sep 11, 2015 | By Edvard Csanyi
Energy and Power
The Basics of Electrical Bus Protections
When we examine electrical protection schemes, the best place to start is with electrical bus protections, as they are the easiest to protect. They utilize the fundamental concept of the overcurrent relay (Figure 1). An overcurrent relay is an electromagnetic device in which current in… Read more
Sep 05, 2015 | By Edvard Csanyi
Energy and Power
Can you really reduce kVA billing after installing power capacitors?
This technical article I dedicate to stubborn factory owners who still don’t believe and don’t want to spend the money on optimizing the factory costs. Not all of them are like that, but the most of them ‘not-much-electrically-educated’ are. So,… Read more
Sep 04, 2015 | By Edvard Csanyi
