ISI / BIS Certification for Outdoor Type Door Oil Immersed Distribution Transformers upto and including 2500 kVA, 33 kV-Specification Part 1 Mineral Oil Immersed

External door type A particular class of electrical transformer intended for outdoor installation in electrical distribution networks is known as mineral oil immersed distribution transformers. These transformers are essential components of electrical distribution networks because they reduce the high voltage energy produced at power plants to levels that are appropriate for residential, commercial, and industrial use. They are perfect for installation in a variety of outside situations because of their exterior design and door for access, which also make them easily serviceable and maintainable. Since mineral oil provides efficient electrical insulation and heat dissipation, it is frequently used in distribution transformers as an insulating and cooling medium.

The need for external door oil immersion distribution transformers stems from a number of issues, such as the growth of the energy infrastructure, energy efficiency objectives, environmental concerns, and the changing energy market.

In order to guarantee that the transformers used in power distribution systems are secure, dependable, and able to satisfy the requirements of outside installations, criteria for outdoor type door oil immersion distribution transformers are crucial. A precise set of technical standards is provided by these specs, which manufacturers must adhere to while designing and producing these transformers. 

Under IS standard IS 1180 (Part 1): 2014, all outdoor type door oil immersed distribution transformers up to and including 2500 kVA, 33 kV-specification part 1 mineral oil immersed, are required to be certified by ISI. 

This product must have the ISI Mark on it in order to be sold, imported, or exported to India.

About ISI / BIS Certification

Indian Standards Institute, or ISI was renamed the Bureau of Indian Standards (BIS) in 1987. The official mark that the Bureau of Indian Standards provides for manufacturers of various goods is the ISI Mark. It is used to indicate compliance with Indian standards (IS) set by the Bureau of Indian Standards (BIS) and has been used as a conformity marking for industrial products. Manufacturers received permission from BIS to use the ISI Mark on items that comply with relevant Indian requirements through the product certification program. 

Only manufacturers (domestic or foreign) who produce the finished product will be awarded ISI Certification. This will not be given to any product importers, traders, dealers, or distributors.

Documents Required for ISI / BIS Certification

The following documentation is required to get an ISI certification:

• Main Application Form V
• Address Proof of Manufacturing Unit
• Details of Manufacturing Process
• Test Report of products

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Process of ISI / BIS Certification

There are two approaches for Indian manufacturers to become certified with the ISI Mark:

• Regular Procedure
• Simplified Procedure 

Regular Procedure

With the possible exception of cases deemed "All India first," which might take up to 180 days, the licensing procedure is expected to be finished in 120 days. This timeline starts on the day the application is received, assuming that at different points in time the documentation, unit assessment, and product conformance are all deemed acceptable.

Step 1: Manufacturing Unit Customization in Compliance with Applicable Indian Standards

• Identifying the applicable Indian Standard
• Establishing in-house testing facilities as per the Standard's requirements

Step 2: Submission of the Application Form

• Preparing an Internal Test Report for the product by the relevant Indian Standard
• Compiling all necessary documents
• Completing the Online Application Form
• Online payment of application fees directly to BIS
• Submitting hard copies of the Application Form with all enclosures to the relevant Branch Office (BO) of BIS

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Simplified Procedure

This is a much faster process than the standard procedure. After a factory inspection is deemed satisfactory and the initial evaluation establishes that the sample complies with the applicable Indian Standard(s), the license application process is expected to be finished in 30 days.

Step 1: Adapting the Manufacturing Unit to Comply with the Relevant Indian Standard

• Identifying the applicable Indian Standard
• Establishing in-house testing facilities to meet the Standard's requirements

Step 2: Sample Testing

• Obtaining the necessary certificate for raw materials (Material Test Certificate - MTC)
• Conducting product sample testing at a BIS-recognized testing laboratory

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ISI Mark Certification Process for Foreign Manufacturers

The process of obtaining ISI Mark Certification for Foreign Manufacturers typically includes the following steps:

Step 1: Application

• Compile all the required documents.
• Submit the documents along with the Application Fee.
• An Application Number will be allotted.
• Scrutiny of the Application will be conducted within a specified time frame.​

Step 2: Query Raised (If Any)

• If any documents are missing or there is non-compliance, you will be informed.
• You need to submit a reply within the given timeframe.

​For more detailed information, please click here.

Why choose Brand Liaison?

Brand Liaison provides helpful support for achieving ISI Mark Certification. Among our offerings are:

•  Expert guidance
•  Streamline process
• Comprehensive support
• Cost-effective solutions
• Time efficient

Please click here to get in contact with our team of specialists for a deeper explanation of the paperwork and steps needed to get ISI Mark Certification.