Dry type transformer installation

The necessary contact pressure must be maintained at the electrical connection of each wiring, and elastic elements such as disc-shaped plastic rings or spring washers should be used.

When tightening the connecting bolts, a torque wrench should be used. The grounding point of the dry-type transformer is on the base of the low-voltage side, and a special grounding bolt is led out, which is marked with a grounding center. The grounding of the dry-type transformer must be reliably connected to the protective grounding system through this point. When the dry type transformer has a shell, the shell should be reliably connected to the grounding system.

When the low-voltage side adopts a three-phase four-wire system, the neutral wire should be reliably connected to the grounding system. SG B 10 series non-sealed H-class dry-type power transformers adopt the special process technology of German MORA dry-type transformers to ensure that the products fully meet the requirements of fireproof, waterproof, and environmental protection.

It is an ideal product for power distribution systems and is widely used in subways, shipbuilding, mining, chemical, power companies, and personnel-intensive buildings and other special requirements for safety occasions. Hoisting, tooling, and testing equipment are complete. Our company has passed the ISO international standard quality management system certification. All performance indicators of the product have reached relevant national and international standards.

If you want to get more information about good quality dry-type transformers, please contact us. Company Profile Certificate Projects. Home Products. This resin develops a thicker varnish that is extremely resilient to salt, moisture, and high humidity, making it an ideal option for harsher atmospheres. They are used in application areas that are vulnerable to alkalis, chlorides, and acids. Open Wound Transformers.

In this process, the coils are heated and dipped in high-temperature varnish and then baked. Cast Coil Transformers. Cast coil transformers are trustworthy even in harsh environmental conditions and hardly need any maintenance. They are usually seen inside buildings, tunnels, offshore platforms, onboard ships, mining services, production plants, and nuclear plants.

Be it commercial, residential, or industrial applications, dry type transformers are going to be an integral part of the electric systems. Moreover, continuous technological developments along with growing focus toward the replacement of traditional insulated systems are like to surge the demand for dry-type transformers and propel the growth of the dry type transformer industry in the coming years.

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COVID has impacted all businesses across the globe. Check Out. The novel coronavirus has affected all businesses across the globe Click Here. Otherwise, you should contact a professional to evaluate and repair the transformer. During routine maintenance, you must conduct several tests of the transformer in addition to the inspection.

These tests verify the operation of the unit and can find issues that do not produce visual defects. For instance, if you notice signs of discoloration during your inspection, electrical issues could be at fault, and you would need to do a TTR. For accuracy of this test and safety to your personnel, do not do a TTR test yourself. Instead, contact a professional who has access to the latest testing equipment for this service.

An expert will have the tools and protective gear needed to run this test correctly and safely. Call Us Today. For a dielectric absorption test, conduct it for 10 minutes from windings to windings as well as the winding to the ground. This test uses measurements at 10 minutes and one minute and divides them in a ratio, the Polarization Index PI ratio. To be acceptable, the PI should be greater than 2. We offer the following services for medium voltage transformers :. We are the leading medium voltage transformer service company and are on call to offer you emergency and standard services and repairs for your unit.

Maintenance of Dry Type Transformer While Energized For safety, do not perform any maintenance tasks when the transformer has energy flowing through it. Maintenance While the Dry Type Transformer Is De-energized For testing the transformer, de-energize the transformer to begin inspection and maintenance. Tests to Conduct for Routine Maintenance During routine maintenance, you must conduct several tests of the transformer in addition to the inspection.

Call Us Today 2. Dielectric Absorption Test For a dielectric absorption test, conduct it for 10 minutes from windings to windings as well as the winding to the ground. Preventive Maintenance Checklist for Dry Type Transformer Use the following as a checklist for maintenance of your dry type transformer: De-energize the transformer before continuing with cleaning and repairs.

Check the system for dust or dirt. Vacuum and blow out the dust or dirt with compressed air.