Power Substation
Four design criteria for human machine interface (HMI) in a substation
With the introduction of IEDs (Intelligent Electronic Devices), the traditional switchboard interface is being replaced by Human Machine Interface (HMI) software loaded on computer hardware. The designer has a wide… Read more
Jan 11, 2017 | By Edvard
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… Read more
Jan 09, 2017 | By Edvard
Energy and Power
31 practical do’s and don’ts to avoid loud transformer humming
The user thinking of loud transformer humming (practically noise) should start at the conceptual stage. If he can, he must consider if he has a noise problem before he specifies… Read more
Jan 06, 2017 | By Edvard
Energy and Power
Selection of distribution transformers for supplying power to LV networks
The characteristic data of distribution transformers are determined by the requirements of the network. The effective power determined must be multiplied by the power factor cosφ to give the rated power… Read more
Jan 04, 2017 | By Edvard
Energy and Power
Respect Murphy’s Law and don’t remote control all systems via SCADA
Every technology has applications for which it seems admirably suited, other applications for which it seems only marginally suited, and a group of applications for which it simply should not… Read more
Jan 02, 2017 | By Edvard
Energy and Power
Say hello to new challenges in 2017! Engineers, Happy New Year!
Well engineers, it’s been a long year 2016. A lot of good things happened in the last 365 days. The most important for me personally and EEP are you –… Read more
Dec 31, 2016 | By Edvard
Energy and Power
Four essential ingredients of an electrical power system
Generally speaking, you must agree that electrical power system is a complex project consisting of the four main ingredients. Now, let’s observe each ingridient in details: Electricity supply Transmission Distribution… Read more
Dec 30, 2016 | By Edvard
High Voltage
Consider this when planning high voltage switchgear installations
The following three criteria must be considered when planning high voltage switchgear installations: Voltage levels Plant concept and configuration Dimensioning High voltage installations are primarily for power transmission, but they… Read more
Dec 28, 2016 | By Edvard
Protection
Fundamental overcurrent, distance and differential protection principles
The aim of this technical article is to cover the most important principles of four fundamental relay protections: overcurrent, directional overcurrent, distance and differential for transmission lines, power transformers and busbars…. Read more
Dec 26, 2016 | By Edvard
Electric Motor
Main features that make AC drive the leading motor control method
We can confidently say that the AC drive is the leading motor control method. This technical article deals with a closer look at the different features of the AC drive, and… Read more
Dec 23, 2016 | By Edvard
Metering
A case study of 110/10 kV substation with centralized protection, automation and control system
Centralized substation protection and control has been attempted in the past based on the available technology. This evolution is now at the intersection of sensing, protection and communication technologies, providing… Read more
Dec 21, 2016 | By Edvard
Energy and Power
Thumb rules for installing AC converter into metal enclosure
If the environmental conditions are likely to exceed normal working ranges of an AC converter, then arrangements should be made to provide additional cooling and/or environmental protection. The temperature limits… Read more
Dec 19, 2016 | By Edvard
Protection
The basic calculation of transmission line protection
The excessive currents accompanying a fault, are the basis of overcurrent protection schemes. For transmission line protection in interconnected systems, it is necessary to provide the desired selectivity such that… Read more
Dec 16, 2016 | By Edvard
Energy and Power
6 wiring and grounding problems that lead to low power quality
In this technical article, typical wiring and grounding problems, as related to power quality, are presented. Possible solutions are given for these problems as well as the possible causes for the… Read more
Dec 14, 2016 | By Edvard
Electric Motor
Sizing of motors and frequency converters for a particular machine load
Manufacturers of electric motors and frequency converters have evolved various methods for quickly selecting the size of motors and frequency converters for a particular machine load. The same basic procedure… Read more
Dec 12, 2016 | By Edvard
