"Lightning Arresters and Generators."

Assalamu Alaikum

_{I am @shadow04
From #bangladsh🇧🇩}

🥰 Dear Steemians 🥰

Hope everyone is well. Alhamdulillah, I am also very well. Today I appeared for participating in the ongoing SLC22/WK3: Lightning Arresters and Generators contest hosted by @mahadisalim Sir. Honorable Mahadisalim sir, Thank you for giving us such a beautiful lesson.

_{Made in Canva}

✅ Write three basic differences between the electrical generator, motor, and transformer.

Three basic differences between electric generators, motors and transformers in terms of performance, power source and output and presence of moving parts are mentioned below:-

🔰Procedure

Generator	Motor	Transformer
Converts mechanical energy into electrical energy.	Converts electrical energy into mechanical energy.	Changes voltage levels while keeping electrical energy unchanged.

🔰 Sources and Mechanisms of Energy

Generator	Motor	Transformer
Takes mechanical energy as input and gives electrical energy as output.	Takes electrical energy as input and gives mechanical energy as output.	Takes electrical energy as input and changes voltage level as output.

🔰 Presence of dynamic parts

Generator	Motor	Transformer
Moving parts rotate.	Moving parts rotate for work	It has no moving parts.

B. Give details about lightning arresters used in the electricity sector in your country

As a result of lightning or high voltage surge, electrical equipment is not damaged, so the method of sending that excess current safely to the ground is called lightning arrester. As a result, our electrical equipment and lives are safe and secure.

The arresters used in the power sector of our country are mentioned below:-

🟢 Horn gap lightning arrester:-

• Horn gap lightning arrester is generally used in LT electricity loads. Two horn shaped metal electrodes usually made of copper are placed facing each other. There is a certain distance between them, called gap. One end is connected to the electrical connection or equipment and The other end is connected to earthing.

Under normal conditions, no current flows through this arrester. However, when an additional surge occurs due to lightning, an arc is formed between the gaps of this arrester and the excess voltage is safely sent to the ground through earthing. Due to the horn shape, the arc rises upwards and Cooling off protects electrical equipment.

🟢 Lightning arrester of HT power:-

• It protects electrical equipment from lightning strikes as well as protects electrical equipment from transient overvoltages coming through substations.

It remains insulated during normal voltage, so no current flows through it. During surge voltage or lightning, the arrester starts to conduct after a certain voltage, and the excess voltage is sent to ground through earthing.

It reverts back to the non-conducting state when the surge is removed.

🟢 Lightning arrester used in HT electricity equipment

• A type of lightning arrester is used for different types of HT equipment. As an example, we can mention here the VCB used in substations. It protects the electrical equipment from damage caused by sudden surge voltages. Three lightning arresters are installed in three phases in VCB. VCB sends the excess voltage to ground using earthing to protect electricalent from excessive surge during lightning.

✅ C. What is the actual current of a three-phase 1500 KVA, 0.9 power factor generator?

* If the generator is given an 80% electrical load, what will the load current be?

✅D. How much KVA generators should you buy for five 30-watt lights, three 70-watt fans, one 1500-watt refrigerator, and one 2000-watt air conditioner?

✅E. Practical: Make a lightning arrester to protect your home from lightning and show us step by step with pictures.

I built a lightning arrester using the knowledge I gained from the lesson to protect my home. Its tools and methods are sequentially shared below:-

S.L	Necessary equipment
1	A copper 3 feet long, 16 mm round.
2	An insulator
3	An earthing
4	Required cables
5	One Earthing

🟢 Step 1

• In the first step I took a copper rod 3 feet long and 16mm in diameter. Then I set up the copper rod well with a ceramic insulator as an insulator to keep the copper separate from the other metal.

🟢 Step 2

• Now I come to the roof of the house to place it on a high place and choose a good place where there is no other metal around. And I will also take care that no other metal can come around it

🟢 Step 3

• Then I connect a 6RM cable to the copper rod and connect it to earthing as learned from last week's lesson, so that during surge voltage the excess current can go through this cable to earthing.

Device :Realme 8w3w location code https://w3w.co/haunting.offhand.steamships

I want to invite @zisha-hafiz @josepha @saikot01 to join this contest.📎Here is the contest link.

25% to @null

🔰Thanks for your valuable time 🔰

• Thanks by,,
• @shadow04