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What voltage on a megger meter would you use to meg a 480 volt motor?
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Would cause a meter to read negative voltage across a dc motor?
A DC motor generates power when it is rotating even when no supply is connected.
How do you connect a megger on a three phase wye - wye transformer for testing?
First you would disconnect the HO bushing connection from ground. Then you would megger low-side phase to ground.. Next you would megger high-side phase to ground.. Lastly megger high-side to low-side phase to phase. You would not megger phase to phase on each side because this is a direct connection.
Why is multimeter not used for insulation testing instead of a megger?
No, you cannot use a multimeter in place of a megger. The megger is used to measure insulation resistance, which could be hundreds of megohms or so. In order to do that, you need a high voltage so as to develop the current needed to sense the resistance. Using an ordinary multimeter would not work as the applied voltage is not high enough, causing the sensed current to be too small to detect.
When speed of fan is increase what is effect on voltage?
voltage would go up typically (you would raise the voltage, not the fan circuit), but it depends on the motor
How do you use megger tester?
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.
What is the minimum resistance when megohming 13.2kv transformer?
A megger would not be suitable for testing insulation resistance of a 13.2-kV transformer, as the transformer's voltage rating is significantly higher than the output voltage from a megger.
What would cause a meter to read negative voltage across a DC motor?
A DC motor generates power when it is rotating even when no supply is connected.
Would cause a meter to read negative voltage across a dc motor?
A DC motor generates power when it is rotating even when no supply is connected.
Why 5KV voltage is applied to Megger for insulation resistance measurement?
It is a easy voltage to obtain and can check for breakover in the insulation. The voltage is higher then what would be put through most wire and shows any weakness.
How do you connect a megger on a three phase wye - wye transformer for testing?
First you would disconnect the HO bushing connection from ground. Then you would megger low-side phase to ground.. Next you would megger high-side phase to ground.. Lastly megger high-side to low-side phase to phase. You would not megger phase to phase on each side because this is a direct connection.
Why is multimeter not used for insulation testing instead of a megger?
No, you cannot use a multimeter in place of a megger. The megger is used to measure insulation resistance, which could be hundreds of megohms or so. In order to do that, you need a high voltage so as to develop the current needed to sense the resistance. Using an ordinary multimeter would not work as the applied voltage is not high enough, causing the sensed current to be too small to detect.
What type of test equipment would you use to check the resistance between motor winding?
Ideally megger test is the best test used to check the resistance of motor winding.
Why would a hayward pool pump shut off after 3 minutes?
The most common reason would be LOW VOLTAGE. CHECK THE POWER AT THE MOTOR. MOST PUMPS RUN ON 220V IF ITS ONLY GOT 110 THATS WHY. CHECK THE POWER AT THE TIMER AND BREAKER ALSO USE A VOLT METER AND CHECK THE POWER AT THE MOTOR, BOTH LINES AND NOT TO GROUND.. CHECK THE VOLTAGE AT THE MOTOR..
What should be the minimum insulation value of a 20 kw 415v phase motor?
415V commonly available wire is 300V or 600V so that would need to be 600V wire to use a megger or a hipot tester (2* operating voltage +1000V) 2000 volt megger or hipot should verify the wiring in this instance 2500v megger will be necessary for 600V wire and wiring devices you also must look and ambient temperature and humidity a test after some operation time can verify this
How do you ohm out a motor?
To ohm out a motor one would use an ohm meter. If one does not own or can not obtain a meter, the motor can be taken to a shop and ohmed out there for a fee.
Why would you get a negative voltage reading?
Because the meter is connected backwards
When speed of fan is increase what is effect on voltage?
voltage would go up typically (you would raise the voltage, not the fan circuit), but it depends on the motor
