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It is done with an instrument called a megohm meter or megger. 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 meter bridge can't be used to measure low resistance and high resistance?
used to measure low Resistance since it must reach a null.
What is the ohm unit used to measure?
Ohms measure electrical resistance. The resistance in ohms is the voltage divided by the current.
Does resistance use amps or voltage?
Resistance doesn't "use" either. Resistance is the division of voltage by current. It can be though of as a measure of how hard it is to push electrons through a substance.
How do you measure inductance?
You can use a LCR (Inductance, Capacitance, Resistance) meter if you can find one.
Describe chracterstics of static and dynamic resistance in case of diode?
actually we can measure the static and dynamic resistance in dc supply mode . static resistence vf/if dynamic resistance vf1-vf2/if1-if2 elumalai.r
What units do you measure resistance in?
Your measure resistance in OHMS ΩOhms.
The will measure resistance only?
The ohmmeter is usually used to measure the resistance of a given wire only.
How do you measure the resistance in a parallel circuit?
You have to measure the voltage, and the current. The resistance is then calculated by using Ohm's Law.
Why meter bridge can't be used to measure low resistance and high resistance?
used to measure low Resistance since it must reach a null.
What is the ohm unit used to measure?
Ohms measure electrical resistance. The resistance in ohms is the voltage divided by the current.
What device is used to measure the resistance of a resistor?
You can use a multi-meter to measure resistance. The specific portion of the meter for measuring resistance is called an ohmmeter.
State 3 functions of wheatstone bridge?
Wheatstone bridge is used to calculate the resistance of unknown resistor in the circuit.
How do you measure the unknown resistance?
You can measure an unknown resistance by using a multimeter set to the resistance measurement function. Connect the unknown resistance in series with the multimeter and apply a known voltage across them. The multimeter will display the resistance value based on the voltage and current readings.
Compute resistance for a circuit with resistance of 10 us?
This question makes no sense. You are asking for resistance and then saying the resistance is 10 us. "US" is not a measure of resistance. The measure is called Ohms. Ohm's Law states that Voltage = Current x Resistance Hence Resistance = Volts divided by Amps.
How do you measure the earth resistance?
megger
When you measure an object's resistance to motion you must measure what?
Inertia is an objects resistance to change in motion. Frictional forces resist motion.
What is elettric resistance?
Resistance is a measure of how much an object opposes the passage of electrons
