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Q-----WAT IS MEGGAR TEST?

 A----The Megger test is a method of testing making use of insulation

Insulation Tester 

Resistance meter that will help to verify the condition of electrical insulation.

This is certainly not a new test, and has been in use for a number of years.

One of the reasons that it is still such a popular option is because it is

nondestructive. The test does have a limit of between 500 and 1000 volts,

so it may not always be able to detect some insulation punctures. It will

usually show the amount of moisture, the leakage current no the moist or 

dirty areas of the insulation, and winding faults and deterioration.

The best way to make sure that you have the right information and

readings is to make sure that you are using the right test equipment. 

Fortunately, quite a bit of high quality equipment is on the market today.

Q----WHAT IS MEGGAR TEST USED FOR?

 A----The main purpose behind the Megger test is so that you will be able

to test for electrical leakage in wires. They are helpful in detecting issues

and leakage that other devices, such as the ohm detector, might not. This

is because you will actually be running current through the device while you

are testing it.

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Q---WAT CAN BE TESTED WITH MEGGAR TEST?

 A---You will find that the Megger test, or insulation resistance test, is going

to be useful in a host of different situations and for different purposes. It willbe possible to detect leaks on bad motors, generators, transformers, and

many other devices. In addition, it is possible to test the wiring in buildings.

Q---WHAT ARE THE COMPONENETS USED FOR MEGGAR TEST?

 A---When performing a Megger test, you are going to need to have

a number of different components. You may need to have a

handheld tester for some of the small jobs, such as working on the small

motors and windings, or the electrical components in a residential home.

However, some of the jobs might be larger and require that you have

a heavy-duty bench style tester  instead. Both of the testers will come with

the small cables that you can attach to the areas that you are testing.

Q---HOW MEGGAR TEST SETUP?

 A---One has to be very careful when setting up and performing the Megger 

test. If one applies too much voltage, for example, it would be possible to

destroy the piece of equipment that you are testing. You will connect theoutput terminals to the device being tested and then turn on the device.

Make sure that you are testing at the right current and make sure that you

are on the maintained output mode of the tester. Select the continuous

ammeter mode, and then you will be able to start gauging the results of 

your test. The tests are usually performed over a period of about 5 to 10

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minutes at 30-second intervals, and one has to record the results each

minute. Finally, you will compare the results.

Q---WHAT ARE POSSIBLE RESULTS OF MEGGAR TEST?

 A---Once you start to record your readings, you will be able to compare

them with the output readings that the device should have based on the

manufacturer’s specifications. If you find that the readings are incorrect, it 

could mean one of several things. It could mean that there is a hole

somewhere in the insulation, or that the device is not running optimally.

What is a Megger Tester?

Megger testers are devices that are used in order to test out electrical

wiring as well as other components of buildings, government structures,

manufacturing facilities like factories and other types of businessoperations. Megger testers will conduct ground testing, insulation testing,

battery testing, low resistance testing, hi-pot testing and many more.

Megger testers are useful for basically any kind of electric testing

necessities. Does this Spark an idea? 

Q---How to Test a Motor With a Megger Tester?

The Megger, a trademarked device, is the nickname for a megaohmmeter,

a battery-operated device used to read high voltage resistance measures inelectrical environments. It is used to properly test the resistance in

industrial electrical motors, because it has the capacity to read high voltage

values with accuracy not available with conventional ohmmeters, and it is

able to detect very subtle electrical anomalies

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WHAT IS MEGGAR AND EARTH TESTER?

 A---Megger is a brand of tester that measures the resistance to ground

“earth" through a conductor that you cannot visually check. The tester normally can put 500v-5000v on the conductor to check the ground

resistance by measuring the induced current. R=I/V

Q--How to Use a Megger Insulation Tester 

 A---A megger, or a megohmmeter, uses a high voltage to test the insulation

value of wires. A megohm is equal to 1,000,000 ohms of resistance. This

high value of resistance measurement ensures that the wire's insulationdoes not have any breaks along the length of wire. In order to measure the

high resistance value, a high voltage is placed on the wire conductor--in

some cases, as much as 15,000 V. Most battery-type meggers generate a

voltage from 1000 to 3000 V.

Q---HOW 2 USE MEGGAR TESTERS?

 A---Megger is an instrument to check the insulation resistance of electrical

equipment. This is having a hand driven generator, produces rated voltage

at a given speed. This induced voltage thus fed to the Phase to phase

terminals to check IR values between two phases or phase to body to

check the IR value between Ph to body. As a thumb rule the minimum IR

values to accept the equipment is rated voltage of the equipment in KV +1

mega ohm.

Q---What is the meaning of OL showing in the display of megger 

tester?

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A---OVER LOAD.

Q---How do you operate and computation of megger tester?

 A---On the whole megger testing is non destructive. What happens is a DC

voltage is applied to the device or winding under test. It is an insulation test

to see is the insulation has been injured in any way to cause a short circuit

when normal power is applied to it. On my megger there are 3 ranges

300V, 750V, and 1000 volts. Applying the proper voltage is essential to not

damaging the device you are testing. Working voltages up to 240 voltsshould use the 300 range. Working voltages up to 600 volts use the 750

volt range and working voltages above 600 use the 1000 volt range. As you

can see if you used the 1000 volt range on a device that had a working

voltage of say 24 volts you could damage the insulation just by testing it.

So meggering a device is non destructive if you use the tester as its

instructions tell you to.

Q---Why earth tester uses an AC voltage and a megger uses a DC

voltage? A---Because the megger will be use only for dc supply system and megger 

will value measure mega ohm

Q---