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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 volts should 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.
What else can I help you with?
Why ac megger not use in cable meggering?
Because the cable has capacitance, and an AC source would not be able to distinguish between capacitance and leakage.
How meggering is done?
Megger testOn 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 volts should 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.
How do you measure electrical insulation resistance value?
By Megger testing (meggering) of the motor any one can measure the IR of the motor. MEGGER is a device used to measure IR. Analog Megger device may generate 500 volts..it gives coil to coil or coil to body IR value...it should not be less than 2 Mega ohm, generally it should be or kept more than 5 mega ohm...thanks ...DEEPAK RAJPUT
What does the voltage of a batter mean?
Do you mean 'battery'
What do you mean by multiplication factor of wattmeter?
what do you mean by multiplication
How much volt apply to instrument cable meggering?
500v
Why is AC meggering not used?
You do not use AC to megger a device, because the purpose of meggering is to measure the insulation resistance of the device. You use DC to do that. If you used AC, you would be unable to differentiate between insulation leakage and capacitance.
Why MICC cables are meggering?
since the MICC cable the isolation between core is less as well as the outer sheath has probability of getting damaged during installation so meggering is important Any clarification mail to amal_elias@ymail.com
When using a megger at 1000v and your reading is 2700 megohms is it a problem?
What is the acepable rating on a #3 wire when meggering @1000v
Can you use ac supply for cable meggering?
No. The cable has capacitance, and an AC source would not be able to distinguish between capacitance and leakage.
Why ac megger not use in cable meggering?
Because the cable has capacitance, and an AC source would not be able to distinguish between capacitance and leakage.
Where can you get on line IEEE standard for 600 volts cable testing?
You can try the IEEE website, but for any good, useful info from them, you have to be a member. Have you tried the NEC (book, or online) for info on 600V cable testing? I would think that a basic "Meggering", and/or "High-Pot" testing of the cable would suffice.
What are the type of pre commissioning testings done before commissioning a electrical substation of voltage rating 110 kilovolt?
Depending on the equipment required for the substation,some of the tests are as follows: meggering,hi-pot testing,continuity checks,c.t. testing,relay testing,ngr testing, capacitance bridge test's on transformers.
What will happen if a light fixture was accidentally megger?
Accidentally meggering a light fixture could potentially damage the fixture, especially if the voltage level of the megger is too high. It could result in short circuits, burned wires, or even electrical shock if proper safety precautions are not taken. It is important to always use the correct tools and follow proper safety procedures when performing electrical testing.
How meggering is done?
Megger testOn 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 volts should 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.
Why apply in dc voltage in winding meggering time?
The DC between windings is analogous to DC on capacitor plates. Windings, like capacitors, require time to charge up to the applied voltage, at which, there will be a constant current. Since Voltage / current= Resistance, the Megohm reading will change/increase until the windings are fully charged to a quiescent, steady leakage current. When current is at a stable leakage level, you will have an accurate reading. xfrmrman
What does (.)(.) mean?
you mean what you mean
