Transmission and Distribution
Voltage Distribution In a Suspension Insulator Strain
A suspension insulator strain consists of a series of alternately insulators and metal parts, which bind each insulator to the next. This constitutes a series of connected capacitors, with each… Read more
Jul 01, 2013 | By Emmanouil Angeladas
Transmission and Distribution
Overhead Transmission Lines – Static Mechanical Support
When designing an overhead transmission line, we should pay attention to ensure that the tension force does not exceed, in any case, the limit of the mechanical strength of the… Read more
Jun 17, 2013 | By Emmanouil Angeladas
SCADA
3 generations of SCADA system architectures you should know about
SCADA systems have evolved in parallel with the growth and sophistication of modern computing technology. The following sections will provide a description of the following three generations of SCADA systems: First Generation… Read more
Apr 22, 2013 | By Edvard Csanyi
High Voltage
Conductor Types Used For Overhead Lines
The international standards covering most conductor types for overhead lines are IEC 61089 (which supersedes IEC 207, 208, 209 and 210) and EN 50182 and 50183 (see Table 1). For… Read more
Apr 20, 2013 | By Edvard Csanyi
Low Voltage
Defining Size and Location of Capacitor in Electrical System (2)
Continued from part 1: Defining Size and Location of Capacitor in Electrical System (2) Size of circuit breaker (CB), fuse and conductor of capacitor bank: A. Thermal and magnetic setting… Read more
Mar 11, 2013 | By jiguparmar
High Voltage
Using High-Speed Grounding Switches
Automatic high-speed grounding switches are applied for protection of power transformers when the cost of supplying other protective equipment is deemed unjustifiable and the amount of system disturbance that the… Read more
Feb 15, 2013 | By Edvard Csanyi
Protection
Connections Of Overcurrent Relay (part 2)
Continued from first part: Types and Applications Of Overcurrent Relay (part 1) It’s used for: 3-phase faults the overcurrent relays in all the 3-phases act. Phase to phase faults the… Read more
Feb 02, 2013 | By jiguparmar
Protection
Types and Applications Of Overcurrent Relay (1)
Types of protection: Unit Type Protection Non-unit schemes Overcurrent protection Earth fault protection Various types of Line Faults Overcurrent Relay Purpose and Ratings Primary requirement of Overcurrent protection Purpose of… Read more
Feb 01, 2013 | By jiguparmar
Cables
Differences Between Earthed and Unearthed Cables
In HT electrical distribution, the system can be earthed or unearthed. The selection of unearthed or earthed cable depends on distribution system. If such system is earthed, then we have… Read more
Jan 21, 2013 | By jiguparmar
Cables
Underground residential distribution layouts
Where general appearance, economics, congestion, or maintenance conditions make overhead construction inadvisable, underground construction is specified. While overhead lines have been ordinarily considered to be less expensive and easier to… Read more
Jan 18, 2013 | By Edvard Csanyi
High Voltage
Purpose of Disconnect Switches In HV Substation
Switches may be of several types, the common characteristic is that none are designed to interrupt fault currents and the insulation or insulators associated with them must coordinate with the… Read more
Jan 14, 2013 | By Edvard Csanyi
High Voltage
Environmental Stresses On External Insulation
The external insulation (transmission line or substation) is exposed to electrical, mechanical, and environmental stresses. The applied voltage of an operating power system produces electrical stresses. The weather and the… Read more
Jan 07, 2013 | By Edvard Csanyi
High Voltage
Enhance Grid Reliability With Hybrid HVDC Breaker
Introduction to HHVDC How does Hybrid HVDC Breaker work? (VIDEO) Hybrid HVDC Breaker Construction Proactive control Prototype Design Of The Hybrid HVDC Breaker Comparison/Summary The advance of voltage source converter-based… Read more
Dec 15, 2012 | By Edvard Csanyi
Protection
Power Line Carrier Communication (PLCC)
Use of PLCC in modern electrical power system is mainly for telemetry and telecontrol. Tele means remote. Telemetry refers to science of measurement from remote location. Introduction Major goal/Application of… Read more
Dec 14, 2012 | By Asif Eqbal
Transmission and Distribution
How Distribution Systems Control Customer Loads?
Distribution systems obviously exist to supply electricity to end users, so loads and their characteristics are important. Utilities supply a broad range of loads, from rural areas with load densities… Read more
Dec 10, 2012 | By Edvard Csanyi
