#cable faults

Insulation resistance testing is very important for low voltage circuit breakers. Harsh temperature excesses and chemical contagion surroundings may add deterioration. The Insulation Resistance Testing is known as a Megger test which is used as a “Spot type” to measure the insulation’s dielectric condition at a given moment in time.

                                          Megger Insulation Tester.

This test is performed by applying a current limited DC test voltage between the conductors and the chassis of the equipment and then it measures any current leakage across the insulation’s di-electrically materials.Test equipment is used to apply an over-voltage to test the integrity of the insulation.

                                         Insulation Resistance Tester.

The main purpose of performing insulation resistance testing-

include-It is used as a quality control measure at the time a piece of electrical equipment is produced.

It is used as a periodic preventive maintenance task

It is used as a troubleshooting tool.

How to perform an Insulation Resistance Test?

                                       Insulations Resistance Test.

By connecting two leads a (positive and negative) across an insulation barrier one can perform an Insulation Resistance Test. A third lead establishes a connection to a guard terminal which can be available with the tester.It allows the person to be selective in evaluating certain specific components in a large piece of electrical equipment.

What affects Insulation Resistance Reading?

Insulation Resistance is temperature-sensitive. When temperature increases, insulation resistance testing decreases and vice versa. So to compare new readings with previous ones, the person requires correcting the readings to some base temperature.

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We have established in 2016, with the name of ELMEF. We are now a number one and a leading company in providing leading Services of PVC Conduit Testing, Electrical Conductors like ACSR, AAAC, AAC, Power Cables and provide many more services.

Registration of the Company

We have registered our names in MPEB and other government departments and offer them with our best services.  We are first to introduce FRLS/ FRLSH cable testing as well as PVC Conduit Testing in Indore, Madhya Pradesh.

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PVC conduit Testing is an automatic machines which forms a production for making so many transparent plastic boxes with the help of this machine. It can even stick and dry automatically at the same time without any scratches on plastic film. Its quality can be easily regulated.

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ELMEF Providing the highest levels of cable testing lab facility:-

Cable Testing Laboratories is an independent high voltage testing lab which is committed to provide the complete guidance regarding the cable wires and it also checks its availability. The evaluation of wires, power cables, accessories, and other electrical equipment and other related tools.

We are at ELMEF are here to deliver comprehensive technical support and superior service to our customers. Our team at our cable testing laboratory is here to provide the highest level of technical and experienced service to its clients. Our skilled and well-trained team is here to improve the services of the cable and to provide all the necessary equipment required for the tests.

Our team is highly productive and it covers a broad spectrum of applications across the industries. We have an experienced and technical team from where the clients can get the knowledgeable and practical advice of its products. Cable testing lab provides a cost effective solution to its clients so that they can have accurate information.

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We guarantee to deliver a quality of work to the client as superiority is the main target of our team. Our skilled and well-trained specialists take the quick initiatives to solve the problem of the client and with this we are able to take a bulk of work in our hands.

We are available for 24*7 hours at your service. So you can contact us and can take the benefit from our cable testing services. You will get all the tech support what you want from the corporation end. You can interact with us any time through the company website. You can call us at our Contact Number- +91 8586931455. You can e-mail us at [email protected] and can chat with our experts to get an expert advice.

The Basic Fundamentals of the Cable Insulation:

                                            Cable Insulation

The Basic discernment of the Cable Insulation properties  structure the foundation for the assessment of a cable operability. These same root provide the basis for formation like of various  physical and electrical  tests and measurements are cost-effective, meaningful and warranted, and are all beginning for the evaluation of present or regular cable test .

Properties of Cable Insulation:

Insulation performance always influenced by the different factors, Some of which include: Thermal bridging. Surface emissivity (“ε” value) Density. Thermal conductivity (“k” or “λ” value) Specific heat capacity. Insulation thickness. The insulating ability of a material is studied as this opposite of thermal conductivity (k).Low thermal conductivity is always to high insulating capability (Resistance value).

What is Good Cable Insulation?

                                          Good Cable Insulation

As we know all about that the good insulation always has the high resistance and the poor insulation having the relatively very low resistance.

The actual resistance values depend upon the factors as the moisture or temperature content of the insulation it can be higher or lower (resistance decreases in moisture or temperature ). When with any insulation system the voltage is impressed ,then some current leak around the insulation. During the testing with the direct high voltage ,insulation absorption current, capacities charging current and by-pass current are all need present to some degree.

Reasons why a Cable Insulation has failed?

When the design limit get exceed by the magnitude of the leakage current ,then cable deliver energy will be no longer efficiently. The main Failure of cable insulation breakdown is often similar with the low efficiently of solid or liquid cable insulation materials used inside the high voltage transformers or the capacitors in the electricity distribution grid, and at end in a short circuit or a blown fuse. The Cable insulation that has already been damaged and pierced just due to the compression of the heat (heat shrinking, soldering), (cable ties, strain reliefs) or stripping. The reason of a cable failure depend on many substances such as oil, water and chemicals can contaminate and made the reason for the shorten the life of cable insulation and cause the serious problems. All insulation cable deteriorates will naturally with the age, especially due to the high loading and when it is not the physically damaged it get exposed to the elevated temperature. In this case, there will be a distributed flow of the leakage current at while a test or energized.

Cable Faults Described