BIS Certification for Oil-Immersed Distribution Transformers – IS 1180 (Part 1):2014

Oil-immersed distribution transformers play a crucial role in the power distribution network by stepping down voltage to usable levels for commercial and residential applications. Ensuring their safety, reliability, and efficiency is vital for national power infrastructure. In India, such transformers must comply with IS 1180 (Part 1):2014, and BIS ISI mark certification is mandatory for manufacturers and importers.

This article outlines the scope of IS 1180 (Part 1):2014, the BIS certification process, and how Standphill India supports transformer manufacturers in achieving compliance.

What is IS 1180 (Part 1):2014?

IS 1180 (Part 1):2014 specifies the performance and construction requirements for outdoor-type, oil-immersed distribution transformers up to and including 2500 kVA, with a voltage class of up to 33 kV.

Key provisions include:

Energy efficiency levels (Star rated as per BEE guidelines)

Temperature rise and insulation class

No-load and load losses

Impulse and short circuit withstand tests

Noise levels and earthing terminals

Painting, labeling, and fittings

This standard aligns with energy conservation norms and safety regulations for transformer design and manufacturing.

Why BIS Certification is Mandatory

Under the BIS Compulsory Registration Scheme and relevant Quality Control Orders (QCOs):

All oil-immersed distribution transformers must be BIS-certified

Only transformers bearing the ISI mark can be legally manufactured, imported, or sold in India

Compliance is required for tenders from DISCOMs, utilities, and government bodies

Non-compliance may result in penalties, product seizures, and disqualification from key markets.

BIS Certification Process for IS 1180 (Part 1):2014

Step 1: Application via Manakonline Portal

Register manufacturer details

Submit plant layout, quality assurance plan (QAP), technical specs

Step 2: Sample Testing at BIS-Recognised Lab

Tests include:

Short circuit test

Impulse voltage test

Load and no-load losses

Insulation resistance

Temperature rise and routine tests

Step 3: Factory Audit by BIS Officials

Evaluation of test benches, internal controls, material traceability, and safety

Step 4: ISI Mark License Grant

Upon successful audit and testing, BIS issues a license to use the ISI mark

IS 1180 (Part 1):2014 must be referenced on the product nameplate and documents

Step 5: Post-Certification Obligations

Periodic product surveillance

License renewal and updated compliance reports

Why Choose Standphill India

Standphill India provides comprehensive BIS certification consultancy for transformer manufacturers nationwide. Our services include:

Accurate application filing

Technical document review

Sample testing coordination

Factory audit readiness

Objection response and license renewal

Final Thoughts

If you're manufacturing or importing oil-immersed distribution transformers, BIS certification under IS 1180 (Part 1):2014 is not optional – it is a legal requirement and a trust signal for buyers.

Let Standphill India help you streamline your certification process and stay ahead in a competitive market.

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