Oil-immersed distribution transformers are vital electrical devices used to control the voltage of electricity in power distribution systems. These transformers are designed to step down high-voltage electricity received from power generation or transmission lines to lower, usable voltages suitable for local distribution. They are called "oil-immersed" because they are filled with transformer oil, a specially formulated insulating and cooling liquid that surrounds the transformer's core and windings. The main components of an oil-immersed distribution transformer include the core, primary and secondary windings, and the oil-filled tank.

The core, typically made of laminated steel, provides a magnetic path for the efficient transfer of energy. The primary winding receives high-voltage electricity, while the secondary winding delivers lower-voltage electricity to consumers. The transformer's tank is hermetically sealed to prevent moisture ingress and filled with transformer oil. This oil serves multiple critical functions: it insulates the windings, dissipates heat generated during operation, and provides a medium for cooling.

This standard, IS 1180 (Part 1):2014, pertains to outdoor type oil-immersed distribution transformers. It specifically covers naturally air-cooled, three-phase, double-wound non-sealed type transformers. Transformers within the scope have ratings up to and including 2500 kVA. These transformers are designed for use on systems with nominal system voltages up to and including 33 KV. Part 2 of IS 1180:2014 addresses sealed type outdoor distribution transformers with similar voltage and KVA ratings. 

REQUIREMENTS FOR IS 1180 (PART 1): 2014

1. Connect the primary winding in a delta shape, and the secondary winding in a star shape.

2. This way, they will be slightly offset by 30 degrees, which is good for their job.

3. Make sure the transformer's tank is really strong.

4. It needs to handle the pressure that builds up inside.

5. Use transformer oil that meets the standard's requirements.

6. Good oil is important for the transformer's performance.

7.  Attach three high-voltage and four low-voltage outdoor bushings to the transformer.

8.  These should be rated for the right voltage and power levels.

9.  Check if the transformer can handle the power it's supposed to.

10.  It should be able to deal with the electrical tests for its voltage class.

11.  The company making the transformers must say which types they want to make under their license.

12.  The Bureau of Indian Standards (BO) will check all the different types during the license period.

13.  When labeling and marking outdoor transformers, you must follow the guidelines set in IS 1180 (part 1):2014.

14.  Every transformer should have a sturdy, non-removable rating plate. This plate must be made from weather-resistant material.

15.  It should be placed in an easily seen spot on the transformer.

16.  The rating plate should display the specific information outlined in the standard.

17.  Apply the ISI mark to each transformer.

18.  To use this official mark, the manufacturer needs to obtain a BIS license from the Bureau of Indian Standards.

19.  Following these instructions ensures that outdoor transformers are properly labeled, marked, and meet the quality standards specified in IS 1180 (part 1):2014.

TESTS

Tests shall be carried out in accordance with the method specified.

·  General requirements Test

·  Type Test

·  Routine Test

·  Air Pressure Test

·  Special Test

Process for BIS ISI Mark Certification

To know the process in detail, please visit:

• ISI Mark Certification for Domestic Manufactures
• ISI Mark Certification for Foreign Manufactures

Under BIS Registration Products ISI and CRS

• BIS CRS Registration For IT Products List
• ISI Mark Registration For ISI Products List

Benefits of BIS Certification

Getting BIS (Bureau of Indian Standards) registration for your products has some really good advantages:

1. More Sales: When your products have BIS registration, it means they're likely to be better quality. Customers trust this, so you'll probably sell more.

2. Saves Money on Quality: Once you get the certification, you don't need to worry about extra quality rules because your products are already known to be good.

3. Builds Trust and Less Risk: BIS-certified items are real and reliable. They work well and last a long time, so there's less chance of problems or harming the environment.

4.  High-Quality Guaranteed: When a product has a BIS registration number, it's a sign that it's top-quality and trustworthy.

5.  Helps Your Business Grow: BIS certification makes your product's reputation better, which can lead to more growth and getting noticed in the market. It's good for expanding your business.

CONCLUSION

Oil immersed distribution transformers has been included in the mandatory ISI Certification Scheme under the IS 1180 (Part 1):2014 standard. Manufacturers cannot import, export, or sell this product in the Indian consumer market without the ISI Mark.

If you require assistance with BIS ISI registration for Oil immersed distribution transformers or ISI mark certification for Oil immersed distribution transformers you can rely on Evtlindia. We offer comprehensive support with all documentation formalities at India's BIS office, ensuring a smooth and hassle-free registration experience. We will guide you through the entire process, from start to finish.

You can contact us via email at contact@evtlindia.com or by phone at 9560935898. Please feel free to reach out to us at any time for the support you need.