Megger and continuity test of cable, How to check cable скачать в хорошем качестве

Megger and continuity test of cable, How to check cable

Megger testing is used to check the insulation resistance of a cable. Here are the steps to perform a Megger test on a cable: First, ensure that the cable is de-energized and grounded. This means that any power source to the cable must be turned off and the cable must be disconnected from any equipment it may be connected to. Next, select the appropriate Megger instrument for the voltage rating of the cable being tested. For example, if the cable is rated for 600 volts, a Megger instrument that can output 1000 volts would be suitable. Connect the Megger instrument to the cable by attaching one lead to the cable’s conductor and the other lead to the cable’s shield or ground wire. Turn on the Megger instrument and select the insulation resistance range. The instrument should be set to the highest range possible to get the most accurate reading. Once the instrument is set, press the “test” button to begin the test. The Megger instrument will send a high voltage pulse down the cable and measure the resistance of the insulation. The Megger instrument will display the insulation resistance reading. A good rule of thumb is that the insulation resistance of a cable should be at least 1 megaohm per 1000 volts of the cable’s rated voltage. If the insulation resistance is within an acceptable range, the cable is considered to be safe and can be put back into service. If the insulation resistance is too low, the cable may need to be repaired or replaced. After the test is complete, disconnect the Megger instrument from the cable and re-connect the cable to any equipment it was previously connected to. Finally, record the results of the Megger test for future reference.