Showing posts from November, 2015


General Requirements And Importance Of Drawings-Diagrams For Underground Power Cable ProjectThe employer may engaged or contract with service-provider to execute an underground power cable project, service-provider actually carry out the whole works as per employer requirements. Here in this article we would like to focus on general requirements and importance of various drawings, designs and calculation sheet to execute an underground power cable project.
The term “drawing” should also included here diagrams, schedules, performance curves, and calculations etc. required for the comprehensive design of the works. The Service Provider should be responsible for the provision of all drawings required for the various stages of the Contract to execute the project.
All drawings, apart from workshop drawings, should be submitted to the nominated Engineer for his approval, in accordance with an approved program. The Service Provider should ensure that drawings are submitted for approval in pri…


How Do Make Earthing/Grounding For Equipment?We know earthing/grounding is very vital part of electrical power transmission and distribution system; but how can we make earthing connection? Yes, to make the earthing system uniform we must follow some standards. Here in this article we will focus on IEC types of earthing system. What is Earthing or Grounding?a general term used to describe the connection of metallic parts of an Electrical Installation or an appliance to earth or ground is called Earthing or Earthed. Notable that the terms ‘Grounding’ or ‘Grounded’ are sometimes used to mean the same as the above. If you look at the most electrical power transmission and distribution system you will see several different three-phase voltage levels like-  400volts, 11000volts, 33000volts, 66000volts, 132000volts and so on.

Important point is that these all voltage levels of electricity coming from same source generator or transformer; but each level of voltage system is isolated from each …


What Is Lightning Arrester Or Surge Arrester?

In a simple and shortly we can say surge arrester or lightning arrester is a device used in electrical power system to protect others equipment from switching surges or high energy lightning surges.

If you are hearing the terms “lightning arrester” or “surge arrester” very first time and thinking, it’s like something “police arrest terrorist”! Yes, you not quite wrong; lightning or surge like a destructive terrorist for electrical power system, surge arrester works like a police man, catch it and send to ground before destruct the system equipment.
Don’t confuse lightning or surge arrester with lightning rod, surge suppressor or TVSS. Lightning Rod is a grounded potential device that divert the lightning surge; Suppressor is a lightning diverter device that uses in low voltage (below 1000V) system; TVSS is Transient Voltage Surge Suppressor used for divert the transient surge in low voltage (below 100v) system.

So as summary, we can say surge or …

চন্দ্র গ্রহণ ও সূর্য্য গ্রহণের কল্প কথা

দেশ-বিদেশর কল্প-কথায় চন্দ্র গ্রহণ ও সূর্য্য গ্রহণ বর্তমান বিজ্ঞানের যুগে আর কোন কল্প কথার স্থান নাই। প্রমান ছাড়া এখন আর কোন কিছুই যেন বিশ্বাস করা বা করানো সম্ভব না। কখনও এমনও ঘটছে যে বাবা-মা ও সন্তানের সম্পর্ক প্রমানের জন্যও বৈজ্ঞানীক প্রমানের প্রয়োজন হয়ে পড়ছে। মানুষ চাদের পিঠে গিয়ে দেখে আসছে, সূর্য্য সম্পর্কে জানছে অনেক অজানা তথ্য।
কিন্ত তার পরেও মাঝে মধ্যে জানতে ঈচ্ছা করে কল্প কথা, কল্প কাহিনী। আর তাই আজকের আয়োজন চন্দ্র গ্রহণ ও সূর্য্য গ্রহণের দেশ বিদেশের কল্প কথা। তবে এ লেখা কাউকে হেয় বা ছোট করার জন্য নয়; নয় কারও বিশ্বাসে আঘাত করার জন্য। শুধুই জানার জন্য। তাই সকলের প্রতি অনুরোধ কাউকে আক্রমন করে মন্তব্য করবেন না। 01. চন্দ্র গ্রহণ বা সূর্য্য গ্রহণ আসলে সূর্য্য ও চাদের মধ্যে যুগ যুগ ধরে চলে আসা বিরোধের জন্য ঝগড়ার ফল। গ্রহণের সময় মানুষেরা যখন ঘর থেকে বের হয়ে আসে দেখার জন্য, তখন চাদ ও সুর্য্য মনে করে পৃথিবীর মানুষরা তাদের ঝগড়া থামাতে আনুরোধ করছেন, তাই তো ঝগড়া থেমে যায়। আফ্রিকা মহাদেশের টগো ও বেনিন দেশের মানুষের মধ্যে এমন কল্প কথাই প্রচলিত। 02. চন্দ্র গ্রহণ আসলে কিছুই না, একটা চিতা-বাঘ চাদক…


How Increase Your Blog Traffic to Build a Long Visitors List Easily and Keep It There
It’s seems rude to say, but reality is that there is no easy or shortcut way to get more visitors or traffic for a new blog. If you search in online relating to your desire more traffic in your blog, you will get huge post about it. But, immediately you will realize that most of these for increasing traffic on their own blog, not for you.
We are not saying it’s not helpful for you, of course it’s helpful and you could able to realizeafter reading each dedicated post  how hard time need to pay behind a blog to increase blog traffic.
Don’t be hopeless any beginner blogger, we want to inform you that high page ranked blog having millions monthly visitors didn’t create overnight and of course they passed lots of struggling, testing, failing and hard working.
Today we are here on this blog post, just show the basic way to the new blogger, how increase blog traffic and earn more visitors simply organizing the…


Trenches Excavation  and Underground Cable Installation
The exact location of each trench should be selected and approved by the Engineer  before cable trench excavation for power cable of any underground cable project.
Trenches should be kept as straight as possible and each trench shall be excavated to an approved formation and dimensions and shall have vertical sides which would be timbered where necessary so as to avoid subsidence and damage.

It’s important to excavate up to depth of at least 100 mm below the base of cable laying. The bottom of each trench should be firm and of smooth contour. Where trenches pass from a foot way to a roadway or at other positions where a change of level is necessary, the bottom of the trench shall rise or fall gradually. Minimum width shall be at least 600 mm for a single cable. For multiple cables, the trench width would be determined from the minimum separation specified and diameter of cables and approved by the qualified Engineer.
The servicer sh…


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