Cables
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Voltage Drop Analysis and Calculation Essentials (MS Excel Sheet Bonus)
A voltage drop is the total amount of voltage loss that happens through all or part of an electric circuit due to impedance and other factors. The more the voltage drops in the system, the more negative impacts will likely…...
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Nov 28, 2022 | By Mohammed Ayman
Power Substation
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Guidelines for HV substation designers to properly analyze, size and select equipment
Irrespective of the voltage level and capacity of any substation, the numbers of equipment and their size are usually the major factors in determining the overall capital cost of substations. In this article, we will primarily focus on analytical skills…...
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This content is not available in your premium membership plan. Please upgrade your plan in order to access this content. You can choose an annually based Basic, Pro, or Enterprise membership plan. Subscribe and enjoy studying specialized technical articles, online video courses, electrical engineering guides, and papers.With EEP's premium membership, you get additional essence that enhances your knowledge and experience in low- medium- and high-voltage engineering fields.
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Dec 13, 2021 | By Bishal Lamichhane
Low Voltage
With EEP's premium membership, you get additional essence that enhances your knowledge and experience in low- medium- and high-voltage engineering fields.
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A case study of fault level calculations for a MV/LV network using direct method
This technical article represents the case study of fault level calculations for an MV/LV network using the direct method. There are many advantages of the direct approach, and the main of them is that it directly uses the system single…...
Membership Upgrade Required
This content is not available in your premium membership plan. Please upgrade your plan in order to access this content. You can choose an annually based Basic, Pro, or Enterprise membership plan. Subscribe and enjoy studying specialized technical articles, online video courses, electrical engineering guides, and papers.With EEP's premium membership, you get additional essence that enhances your knowledge and experience in low- medium- and high-voltage engineering fields.
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Jul 19, 2020 | By Sivakumar K
Cables
Specifying energy efficient motor, cabling and local power transformer
Many energy saving actions can encourage specifiers and engineers to look closely at the savings which can be made by specifying an energy efficient version of a particular component. This technical article presents the case for taking the important step… Read more
Jan 09, 2017 | By Edvard Csanyi
Energy and Power
31 Common Household Circuit Wirings You Can Use For Your Home (2)
1st part | 2nd part | 3rd part The list of the next ten household circuit wirings: Double receptacle circuit with shared neutral wire (receptacles alternate circuits) Double receptacle small-appliance circuit with GFCIs & shared neutral wire Double receptacle small… Read more
Jun 14, 2016 | By Edvard Csanyi
Cables
Underground residential distribution – More hidden and more reliable
A classic underground residential distribution circuit is an underground circuit in a loop arrangement fed at each end from an overhead circuit (see Figure 1). The loop arrangement allows utilities to restore customers more quickly. After crews find the faulted… Read more
Mar 11, 2016 | By Edvard Csanyi
Cables
Electrical Design Project Of a Small Bakery
A small bakery with just a counter and storage areas is simple to design. The electrical design follows the layout for a house, but care must be taken on loading factors if direct-acting electric heaters are switched on all day. These days,… Read more
Aug 26, 2015 | By Edvard Csanyi
Energy and Power
Example for Coordination of Cascaded Circuit Breakers
A 440 V 60 Hz switchboard feeds a 4-wire distribution board for small loads such as socket outlets. The switchboard has a fault making capacity of 100kA rms. After applying diversity factors to the loads the total load current is… Read more
Jun 24, 2015 | By Edvard Csanyi
Electrical Lectures
Cable sizing of sub-main electrical circuits (working examples)
A sub-main electrical circuit can be defined as a circuit connected directly from the main LV switchboard to a sub-main distribution panel or a rising main for final connection of the minor current-using equipment. The Code requires that the maximum copper loss in… Read more
Apr 29, 2015 | By Edvard Csanyi
Energy and Power
Eleven major causes of power system failures
To gain a broader understanding of power system reliability, it is necessary to understand the root causes of system faults and system failures. A description of major failure modes is provided below. Underground Cable Transformer Failures Lightning Tree Contact Birds… Read more
Mar 18, 2015 | By Edvard Csanyi
Cables
Test On 110kV Power Cable After Installation (2)
In previous part of this technical article first three procedures were explained. Now the rest will be explained in details: Phase indication test (previous part) DC conductor resistance measurement (previous part) Capacitance test (previous part) DC Sheath test on outher sheath… Read more
Dec 26, 2014 | By Zafar Iqbal
Cables
Test On 110kV Power Cable After Installation (1)
Site test procedure covers all necessary electrical testing for the 110 kV cable and accessories to be carried out during and after installation of the cable system. This procedure is in line with the requirements of the contract suitable for… Read more
Dec 22, 2014 | By Zafar Iqbal
Cables
Characteristics of XLPE insulated cables
XLPE is the recognized abbreviation for cross-linked polyethylene. This and other cross-linked synthetic materials, of which EPR (ethylene propylene rubber) is a notable example, are being increasingly used as cable insulants for a wide range of voltages. Polyethylene has good… Read more
Nov 12, 2014 | By Edvard Csanyi
Cables
What engineers should know about using conduits in power substation designs
There are several locations where conduit is used in power substation designs. The most common one considered is conduit used to provide cable access to equipment, such as breakers, transformers, instrument transformers, and motor-operated disconnect switches located in the yard… Read more
Jul 25, 2014 | By Edvard Csanyi
Cables
An example how to calculate voltage drop and size of electrical cable
According to the National Electrical Code, in order for general use circuits to operate reasonably efficiently, the maximum voltage drop for branch circuit conductors is 3% and for feeder and branch circuit conductors combined it is 5%. When designing circuits… Read more
Jun 30, 2014 | By Jignesh Parmar
