What is BS 419 - Specifications to measure properties of varnished fabrics and tapes about?
BS 419 covers fabrics woven from cotton, silk, nylon polyethylene-terephthalate (PTP)5) and glass, coated on both sides with varnish, and of nominal thickness from 4 mil (0.10 mm) to 10 mil (0.25 mm) supplied in the full width of approximately 36 inches (915 mm) or slit into tape. Although the types of varnished fabric are described throughout BS 419 as “yellow” and “black”, any varnish having the appropriate properties but differing in colour may be used, by agreement between the purchaser and the supplier.
Who is BS 419 - Specifications to measure properties of varnished fabrics and tapes for?
BS 419 on varnished fabrics and tapes is useful for:
- Electrical engineer
- Manufacturer of winding wire
- Manufacturer of trasformers
- Manufacturer of heavy electrical equipments
- Manufacturer of electrical appliances
- Power Distribution companies
Why should you use BS 419 - Specifications to measure properties of varnished fabrics and tapes?
Varnished fabric and tapes are used for providing insulation at joints and terminations. It is important for a designer and manufacturer to select insulation of varnished fabrics and tapers appropriately for the their use otherwise may cause system failure, and short circuits.
BS 419 provides best practice guidelines for manufacturers and even the users for obliging to agreements.
BS 419 provides specifications such as:
- Designation
- Quality
- Thickness
- Width
- Length
- Joins
- Packaging
- Electric strength (proof)
- Other properties
- Varnish stability
- Extensibility
Using these specification mentioned in BS 419 can help you with selection and inspection process to make electrical systems safer and reliable.