Showing posts from April, 2017

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 …

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…


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