Technical Guide/Paper
Protection of electrical networks
Generally, with an HV power supply, a private distribution network comprises (see Figure 1-1): An HV consumer substation fed by one or more sources and made up of one or more busbars… Read more
May 05, 2012 | By Edvard Csanyi
Energy and Power
Using AC and DC together in electrical system?
There are a number of issues to using AC and DC together in the same electrical system. Briefly, they are: circuit boxes and hardware, outlets, wiring schemes and sizes, and switches. The Electrical… Read more
May 05, 2012 | By Edvard Csanyi
Maintenance
Measurement of insulation resistance (IR) – 2
Continued from first part: Measurement of insulation resistance (IR) – Part 1 1. IR Values For Electrical Apparatus & Systems 2. IR Value for Transformer 3. IR Value for Tap Changer… Read more
Apr 29, 2012 | By jiguparmar
Lighting
Light Emission Depreciation
Illuminance provided initially by a lighting installation will decrease in a gradual way during its use due to a reduction in lamp lumens, to lamps which burn down, and to… Read more
Apr 24, 2012 | By Edvard Csanyi
Technical Guide/Paper
Difference Between Switchgear and Switchboard
One important element of good power system design is the proper selection of the distribution equipment. The choice of using either switchgear or switchboard must be based on many different… Read more
Apr 07, 2012 | By Edvard Csanyi
High Voltage
Substation Main Functions and Classification
An electrical substation is an assemblage of electrical components including busbars, switchgear, power transformers, auxiliaries etc. These components are connected in a definite sequence such that a ckt. can be… Read more
Mar 29, 2012 | By Edvard Csanyi
Technical Guide/Paper
ETAP
ETAP is the most comprehensive analysis platform for the design, simulation, operation, and automation of generation, distribution, and industrial power systems. ETAP is developed under an established quality assurance program… Read more
Mar 23, 2012 | By Edvard Csanyi
Energy and Power
Smart Grid Concept and Characteristics
A smart grid is an electricity network that uses digital and other advanced technologies to monitor and manage the transport of electricity from all generation sources to meet the varying… Read more
Mar 21, 2012 | By Edvard Csanyi
Cables
Copper or aluminium? Which one to use and when?
Apart from their electrical conductivity, the other technologically important properties of copper and aluminium differ so significantly (density is an obvious example) that their areas of application are and have… Read more
Mar 16, 2012 | By Edvard Csanyi
High Voltage
Using HVDC Technology For Transmitting Electricity
An alternate means of transmitting electricity is to use high-voltage direct current (HVDC) technology. As the name implies, HVDC uses direct current to transmit power. Direct current facilities are connected… Read more
Mar 05, 2012 | By Edvard Csanyi
Metering
Voltage Instrument Transformer (VT) – Introduction
Instrument transformers are primarily used to provide isolation between the main primary circuit and the secondary control and measuring devices. This isolation is achieved by magnetically coupling the two circuits…. Read more
Feb 20, 2012 | By Edvard Csanyi
Technical Guide/Paper
Guide to MV/LV transformer substations
An electrical transformer substation consists of a whole set of devices (conductors, measuring and control apparatus and electric machines) dedicated to transforming the voltage supplied by the medium voltage distribution… Read more
Feb 10, 2012 | By Edvard Csanyi
Electric Motor
Internal losses that reduce efficiency of a DC generator
There are four internal losses that contribute to lower efficiency of a DC generator. Copper losses Eddy-current losses Hysteresis losses Mechanical losses Copper loss is the power lost as heat… Read more
Feb 03, 2012 | By Edvard Csanyi
Cables
EHV/HV Underground Cable Sheath Earthing (part 1/2)
In urban areas, high voltage underground cables are commonly used for the transmission and distribution of electricity. Such high voltage cables have metallic sheaths or screens surrounding the conductors, and/or… Read more
Jan 19, 2012 | By jiguparmar
High Voltage
Segregated Phase Bus System
In this construction all the phases are housed in one metallic enclosure as earlier, but with a metallic barrier between each phase, as illustrated in Figure 1. The metallic barriers provide the required… Read more
Jan 18, 2012 | By Edvard Csanyi
