Assalam-o-Alaikum! |
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Hello friends! Myself @moazzamushtaq from #pakistan. Welcome all of you to my post. I hope that you all will be healthy and will be enjoying your lives. Today I'm going to participate in SLC-S22/W3 's course and teacher is @mahadisalim. The topic is "Lightning Arresters and Generators". Let's start the topic;
A. Write three basic differences between the electrical generator, motor and transformer |
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Below are three basic differences between electrical generator, motor and transformer.
| Generator | Motor | Transformer |
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| It converts mechanical energy into electrical energy. | It converts electrical energy into mechanical energy. | It changes AC on one voltage into Ac of different voltages (mean either step up or step down). |
| It works on the pricipal of electromafnetic induction using a conductor. | It operates on the pricipal of electromagnetism. | It also works by electromagnetic induction but using two coils primary and secendory. |
| It produces an electricity and mostly used in power plants. | It uses in electrical appliances and for drivinv mechanical loads. | Commonly uses in electrical destribution systems for efficient transmission of electricity. |
B. Give details about lightning arresters used in the electricity sector in your country |
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Lighting arresters which are also known as surge protectors or lighting protection devices are commonly used in my country because these are very essential for protecting the electrical grid and overall infrastructure. These lighting arrester protects electrucal equipments from any damages caused by electrical strikes. Below are some common lighting arresters used in my country.
Types of lightning arresters used in Pakistan:
1. Valve-Type lightning arresters: These arresters are less common today but are still in use in some areas of my country. For preventinv electrical surges, a series of valves are used in these arresters.
2. Gap-Type lightning arresters: These are commonly used in older electrical systems in which a higher protection level is not much needed. These arresters consist of an air gap which play a role to ionize current during a lightning strike or surge to allow the current to pass through the ground
3. MOV lightning arresters: MOV (metal oxide varister) are a type of arresters which are commonly used in Pakistan. These arreaters provide protection of equipments by controlling down high voltages and sending the energy of the circuit to the ground.
C. What is the actual current of a three-phase 1500 KVA, 0.9 power factor generator? |
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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? |
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E. Practical: Make a lightning arrester to protect your home from lightning and show us step by step with pictures. |
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As we have descussed above that light arresters are very essential for protecting electrical equipments and for preventing electrical surges. Below in some steps I have shown that how to make a lighting arrester.
Required equipment:
- Copper rod
- A copper bowl
- Insulater
- Copper wire
- Earthing
First I took a copper rod of 3 mm diameter and about 3 feet length.
Four copper rods of about 0.25 mm diameter for connecting to the main rod.
In this step I have connected those four rods to main rod.
Insulator is also necessary for safe fitting of rod to the ground. I have used a rubber instead of ceramic as rubber is also act as insulator.
In last step I have connected the arrester to the earthing bu using copper wire.
so in these steps I have shown you that how to make an arrester. This is a simple aresters and I have not fit it to my house as I am away from my home for study.
I am inviting @abdullahw2, @josepha, @sahar78 to participate in this learning course.
Thanks.
Best regards:
@moazzamushtaq.