Design Guide for Underground Transmission Line

Design Guide for Electrical Energy Transmission in Underground Cable Network Voltage level of transmission line network is the key considering design guide factor for bouth overhead transmission system and underground cable transmission system. Schematic line diagramin below , the specific voltage level guide are used for conventional overhead transmission and new concept underground transmission network system for- Power Generation; Bulk Transmission; Sub-Transmission; & Distribution System. What The Distribution Voltage Level Is?In electrical power transmission and distribution system, voltage levels are divided into different category considering the equipment operating capability, such as- Low Voltage (LV)              - up to 1000Volt; Medium Voltage (MV)       - 1000 Volt ~ 35 kilo Volt; High Voltage (HV)            - 35kilo Volt ~ 230 kilo Volt; Extra High Voltage (EHV)  - above 230 kilo Volt; & Ultra High Voltage (UHV)  - above 800 kilo Volt. Also, very safe low voltage like less…

Transfer Switch Diagram And Operation

What Is Transfer SwitchTransfer Switch is nothing but an electrical device that allows to transfer electrical flow safely from multiple source to load. On the other way the load can trans-receive electrical energy from multiple source safely.

To prevent the power outage from main utility power supply a transfer switch can take power from alternate utility source or standby generator source or even emergency power backup source.

Transfer Switch can operate automatically as soon as failure the main source or after a certain period of time to reinstate the main source. This type of transfer switch is known as Auto Transfer Switch or in short ATS.

Other Transfer Switch is known as manual transfer switch which is operates manually.When the utility power goes out, its simply need to plugin the alternate source into transfer switch to start it up, and flip the transfer switch from the main source position to the alternate source position.

In very basic, transfer switches are two types-
Auto Tra…


Resisting severe or extreme  temperature like very hot or very cold is very challenging for electrical energy transmission power cable. But cable manufacturer are continuously changing their gear to design a upper product to take a new challenge for severe hot and cold temperature resistance along with mechanical and chemical loading.

Power Cables Can Work in Extreme High Temperature Cable manufacturers claim that they use some intelligent materials to combat temperature extremes like + 90°C to -180°C. Cable having the aid of pure nickel conductors can work in as high as 500°C without any problem. Quartz and silica taping makes electric cables flame-resistant and heat-resistant to over 1100°C.
Power Cables Can Work in Blaze and Self-ExtinguishDuring high flame, cable can protect itself using self-extinguishing technique. Doping chlorine, fluorine and bromine cable become a flame retardants and self-extinguish. Using some silicon-based material, metal clad or ceramicized cable even can …


Electricity Myths Can be a KillerThere are lots of juicy myths on various subjects like earthquake, eclipse, etc. in almost every nations; but fact is that electricity myths are not jukes or fun, just a little mistake can cause of severe electrical shock, burn or even death!! If you don’t sure or without advice from electrician, do not believe any myth on electricity. To know the fact contact your nearest electricity utility company or any electrical professional or electrician. Our post on electricity myth and fact may not be juicy or folky but  will give you some important information that will help to use safe electricity as well as save your electricity. Myths and Facts on Electrical SafetyMyth: Power lines are insulated, no chance to shock.                                Fact: Most of the powerlines are not insulated and insulated powerlines also can lost their insulation any time very easily. Myth:This line is safe because it is not high voltage line. Fact: Actually high voltage is n…

Safety Clearance to Exposed Live Conductors

Working Safety Clearance and Phase Gap between Exposed Live Conductor Herein this article we will focus on “safety clearance to live bare live conductors during working in electrical power distribution substations or switching stations” and “phase gap or safety clearance to electrical energy transmitting energized conductors between others power conductors, communication conductors or transportation navigation system” to ensure safety for human and property, as well as operate a proficient electrical energy network system. Safety Clearance during Works in SubstationsLine crews often work in a substations or switching stations where all the equipment and conductors are not possible to be dead; but possible to ensure minimum safe distance for the working section from the exposed live section following as below: 1.Dead or working section should be identified clearly and barricaded appropriate barrier-rope; 2.Electrical live or non-working portion must be defined with appropriate signs; 3.Rec…

Power Factor Correction and Harmonic Filter for Electrical Plant

To ensure quality power supply in an electrical plant, Engineers know in mass the importance of Power Factor Correction equipment, and in advance Harmonic Resonance or Harmonic Filter. The common and essential  term Power Factor Improvement (PFI) or power factor correction in Electrical Engineering sect is denoted in another previous post as Electrical Power Factor in Schematic Diagram where Electrical Power Factor in Schematic Diagram and Bangladesh Electricity Distribution Code Published by Bangladesh Energy Regulatory Commission is described briefly. So, in this article Harmonic Filter is highlighted only. What is Harmonic Filter? Harmonics are currents and voltages that are continuous multiples of the fundamental frequency 50 Hz such as 100 Hz (2nd harmonic) and 250 Hz (5th harmonic). So, harmonic filter is used to eliminate the harmonic distortion caused by loads. How Does Harmonic Filter Work?The working principle of Harmonic Filter is shown schematic line diagram below:
In figure …
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