In the world of power generation and
electrical transmission, Paper Covered Copper Conductors (PCC) play a vital
role, especially in the winding of power and distribution transformers. These
conductors are known for their excellent thermal stability, dielectric
strength, and mechanical properties, which make them highly reliable for
critical applications.
To ensure the safety, reliability, and
performance of PCCs used across industries, the Bureau of Indian Standards
(BIS) has introduced the standard IS 7404 (Part 1): 1991. BIS certification
under this standard ensures that the product meets all technical and safety
requirements and is approved for use in the Indian market.
What Are Paper Covered Copper Conductors?
Paper Covered Copper Conductors are
copper wires (round or rectangular) that are insulated using layers of
specially treated paper. The paper serves as an electrical insulator and
protects the conductor from short-circuits, overheating, and breakdown in
high-voltage environments.
These paper layers are often
impregnated with insulating oils or resins to enhance their dielectric
properties, moisture resistance, and thermal endurance. The resulting product
is a conductor capable of withstanding high voltages, temperatures, and
mechanical stress, making it ideal for transformer windings, reactors and
chokes, oil-filled equipment, and other high-voltage electrical apparatus.
About IS 7404 (Part 1):1991 - BIS Standard For PCC
The Indian Standard IS 7404 (Part 1):
1991 pertains specifically to paper-covered round copper conductors. It lays down
the specifications, construction requirements, dimensions, and testing
procedures for ensuring uniformity and safety in these conductors.
This standard is applicable to
manufacturers of PCC used in electrical equipment such as:
●Oil-immersed transformers
●Instrument transformers
●Special motors and generators
Why BIS Certification Is Important For PCC
Obtaining a BIS Certification (ISI Mark) is essential for the following
reasons:
- ●Safety Assurance: Ensures the product
can withstand electrical, thermal, and mechanical stresses.
- ●Regulatory Compliance: Required to
legally sell the product in the Indian market under the BIS Conformity Assessment Scheme.
- ● Industrial Credibility: Builds
confidence among transformer manufacturers and power companies that the conductor
meets national standards.
- ●Market Access: Makes participation in
public tenders and government procurement possible.
- ●Avoid Penalties: Non-compliance can lead
to rejection of shipments or cancellation of contracts.
Key Requirements As Per IS 7404(Part 1):1991
To comply with
the standard and obtain BIS certification, the following parameters must be
met:
- ●Conductor Material: The conductor must
be made of either annealed or hard-drawn copper, in accordance with IS 191:
2007 (or the latest version). It should be free from impurities and must be
mechanically sound.
- ●Insulating Paper: The insulating paper
must have high dielectric strength and be properly wrapped. The paper layers
should be free of tears, creases, or overlaps. Acceptable types of paper may
include kraft paper, crepe paper, or other treated varieties.
- ●Conductor Size and Tolerance: Round
conductors must conform to the diameters specified in the standard tables. The
dimensional tolerances should be within the limits prescribed in IS 7404.
Testing Parameters For BIS Certification
| to APPLY FOR BIS CERTIFICATION, MANUFACTURERS NEED TO SUBMIT THE FOLLOWING DOCUMENTS:- |
| Application Form |
| Manufacturing Process Details |
| Quality Contorl Plan |
| Test Report From BIS- approval laboratories |
| Factory layout and equipment details |
| Proof of business registration |
| Product specifications and technical details |
Declaration of conformity to indian standards
|
Additionally, manufacturers may be required to provide proof of compliance with environmental and safety regulations, depending on the specific type of product being certified.
Process To Obtain BIS Certification For PCC
The certification process involves the
following steps:
- ●Application Submission: Apply to BIS
through the online portal (ManakOnline). Include product specifications,
manufacturing details, and relevant test reports.
- ●Factory Inspection: BIS officials will
inspect your manufacturing facilities, production controls, and internal
testing capabilities.
- ●Sample Testing: Random samples of the
product will be collected and tested in BIS-recognized laboratories.
- ●Evaluation and Grant of License: If your
products comply with the required standards, BIS will grant a license
permitting the use of the ISI mark on certified products.
- ●Post-Certification Surveillance: The BIS
will conduct regular audits and sample checks to ensure ongoing compliance.
To Know The Process In Detail, Please Visit:
Under BIS Registration Products ISI and CRS
Documents Required For BIS Certification
To apply for BIS certification, manufacturers need to submit the following documents:
- Application form
- Manufacturing process details
- Quality control plan
- Test reports from BIS-approved laboratories
- Factory layout and equipment details
- Proof of business registration
- Product specifications and technical details
- Declaration of conformity to Indian standards
Additionally, manufacturers may be required to provide proof of compliance with environmental and safety regulations, depending on the specific type of product being certified.
BIS ISI Mark Certification Costing And Timeline
Marking & Packing Guidelines
As per BIS regulations, the following
information must be marked on each spool
or coil of the conductor:
●Manufacturer’s name and
trademark
●Type and size of conductor
●Standard reference: IS 7404
(Part 1): 1991
●Lot or batch number
●Date of manufacture
●ISI Mark, if certified
The conductors should be packed in a
way that prevents damage to the insulation during transportation or storage.
Why Choose EVTL India?
At EVTL India, we specialize in guiding manufacturers through the complete
BIS certification process—from documentation and sample testing to audit
preparation and license acquisition. If you manufacture Paper Covered Copper
Conductors, securing BIS certification is essential for legal compliance,
market trust, and competitive advantage.
