The insulation resistance test or megger test is a technique of testing making use of an insulation tester resistance meter. It will assist to confirm the state of electrical insulation. Megger tester is fame raised since the long back device is similar in its uses and idea of testing; little real development appeared in the last years with its design and tester quality. Now, the option of top quality is offered which is easy to use and quite safe.
Megger Testing is a spot padding test that makes use of the applied DC voltage, either 250Vdc, 500Vdc 1,000Vdc, or <600V, 2,500Vdc, and 5,000Vdc to calculate insulation resistance in either kΩ, MΩ or GΩ. The calculated resistance is planned to show the condition of the insulation or dielectric in the middle of the two conductive parts, where the higher the confrontation, the better the setup of the insulation. Perfectly, the insulation resistance would be never-ending, but as no insulators are ideal, leakage currents through the dielectric will make sure that a finite resistance value is calculated.
Why Megger Testing is important to follow up?
The quality of the insulation resistance of an electrical system humiliates with time, and environment state i.e. temperature, dampness, moisture, and dust parts. It also finds impacted unenthusiastically due to the presence of mechanical and electrical stress, so it turns quite important to check the Insulation resistance of tools at a constant regular interval to avoid any calculate electrical or fatal shock.
Take an example. If the home has simply experienced a fire and you need to begin the rebuilding procedure. The Insurance Company inform you that the local authority, or the Insurance Company at their level, needs a “Megger Test” to find the uprightness of the wiring system in your house.
Megger testing does not reason any harm, making it a good choice when somebody does not desire to put holes in walls to test electrical insulation for any troubles or issues. The testing device just goes in the middle between 500 and 1,000 volts, which is comparatively low. Due to the low voltage, several punctures in the insulation go hidden. It commonly gives information about the leakage current and whether lagging areas have extreme dirt or moisture, and winding faults.
What is to be done at the time of Megger Testing?
One can test the circuits for the present connections or melted areas of the fault that may take place during a fire event. The results can be easily analyzed and particular circuits can be isolated. It can be changed to insure that there are no further troubles on your affected routes. If you have fire talk to the Adjuster and check if Megger Testing is necessary. It is commonly wrapped by Insurance as the last thing they wish to perform another claim a month after you can get back your domicile.
The megger testing services have the tool on hand and the proficiency to perform your Megger Testing. They can get the results logged and filed with your insurance transporter and the Local Building Department. It is important to make sure that the present wiring is secure. No doubt, to install new wiring as required as well.
How Megger Testing is carried out?
A multimeter is widely used as an insulation tester in similar setups and mostly a continuity test just is carried out. However, for detecting and testing for a leak current during a normal or overloaded state, a special gadget known as the Insulation tester is utilized.
It calculates electrical leakage in wire and the results are quite trustworthy as we shall be passing an electric current through the device in the way of testing. We confirm the electrical insulation level of any device such as cable, motor, generator winding, or common electrical installation.
It is quite a popular test being performed for quite a long back. Not required it shows us the precise area of electrical puncture but shows the quality of the leakage current and level of moisture inside the electrical equipment and winding system.
Here look into the process of the insulation resistance test or megger test that is shared here:
Initially, we will cut down all the line and neutral terminals of the transformer.
The test of the Megger results in the connection to LV and HV bushing studs to calculate the Insulation Resistance IR value in the middle of the LV and HV windings.
Megger test leads are a connection to HV bushing studs and transformer tank earth point to calculate the value of the Insulation Resistance IR in the middle of the HV windings and earth.
Megger test leads are joined to LV bushing studs and transformer tank earth point to calculate the Insulation Resistance IR value in the middle of the LV windings and earth.
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Testing assures a clear image of the health of your cable system with a Risk of Failure Analysis. The analysis rightly grades the different states of the cables and gives recommended remedies according to the severity of the conditions. It assists the asset managers to know the expected failures on system loops and radials, implies the process of rehabilitation, and puts you on the way ahead of effective solutions.
The professional and experienced service provider in UAE performs testing jobs for different companies in the area. No project is supposed to be large or small for the expert technicians, and we’ll confirm that you get familiar with the system’s results before we leave. Focus on the team to know about the condition of the electrical equipment you use for regular operations. Talk to the team of experts for more information.
