What is BS EN 3475-307- Corona extinction voltage of electrical cables for aircraft use about?  
BS EN 3475-307 is one of the parts of the BS EN 3475 series of standards that defines methods to cover the detection and measurement of partial discharge (corona) under an applied test voltage, including the determination of partial discharges (corona) inception and extinction voltages as the test voltage is raised and lowered, of electrical cables for aircraft use. It shall be used together with EN 3475-100.
BS EN 3475-307 has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN).
Who is BS EN 3475-307- Corona extinction voltage of electrical cables for aircraft use for? 
BS EN 3475-307 on corona extinction voltage is useful for: 
- Spacecraft and space products manufacturers         
- Aerospace products manufacturers   
- Testing agencies involved in the inspection of spacecraft and aerospace products         
- Quality control personnel for spacecraft products      
- Aeronautical engineers 
- Space researchers
Why should you use BS EN 3475-307- Corona extinction voltage of electrical cables for aircraft use?  
For an electrical cable, the presence of partial discharges effects at operating voltage may result in a significant reduction of service life.
Some insulation materials are more susceptible to such discharge damage than others.
Evidence of partial discharges during operation signifies for example:
- The insulation thickness is insufficient for the applied voltage
- The quality of the insulation is inadequate possibly due to excessive size or quantities of internal cavities or voids
- An overstress is present, resulting in a local reduction of the cable insulation properties.
BS EN 3475-307 provides information on the materials and construction of cables. BS EN 3475-307 is important because it enhances quality and user satisfaction. BS EN 3475-307 can boost the customer’s faith and confidence in the aircraft and enhance their experience working with the aircraft in the long run.
