What is BS EN 3774-004 - Product standard for UNC thread terminals about ?
BS EN 3774 is a European standard on aerospace that discusses guidelines on three-pole circuit breakers as well as UNC thread terminals.
BS EN 3774-004 is the fourth part of a multi-part series that specifies the characteristics of three-pole circuit breakers, temperature compensated with a rated current from 1 A to 25 A, used in aircraft on-board circuits at a temperature between - 55 °C and 125 °C for ratings ≤ 15 A and - 55 °C to 90°C for ratings > 15A and at an altitude of 22000 m max.
These circuit breakers are operated by a push-pull type single push button (actuator), with delayed action "trip-free" tripping. They can continue to function up to the short-circuit current.
Who is BS EN 3774-004 - Product standard for UNC thread terminals for ?
BS EN 3774-004 on product standard for UNC thread terminals is applicable for:
- Aerospace avionic electrical and fibre optic technology
- Manufacturers of circuit breakers
- Aerospace and defence industries
- Designers of circuit breakers
- Aircraft electrical manufacturers
- Design engineers for airplanes
- Quality control personnel for aircraft and related applications
Why should you use BS EN 3774-004 - Product standard for UNC thread terminals ?
UNC is generally used for mass production of threaded fasteners, such as bolts, screws, nuts, etc and are often used within the agricultural industry because of their strong coarse threads. The thread is deeper and more generic than that of a fine thread and allows for easy removal, whilst they also have a higher tolerance for manufacturing and plating.
Three-pole circuit breakers are used most often in a three-phase electrical system, and that connects three different conductors, such as is often required by heavy-duty industrial motors. When a surge exists anywhere in the system, across one or more of the conductors, the breaker trips, the power bridge collapses, and the circuit opens. As a manufacturer of circuit breakers, you can use BS EN 3774-004 to improvise the production process of three-pole circuit breakers.
BS EN 3774-004 provides best practice guidance on the dimensional characteristics, mass, material, marking, packaging, and panel mounting.
BS EN 3774-004 also provides you with the mechanical, electrical, environmental, qualification and material tests of three-pole circuit breakers. By adopting guidelines under BS EN 3774-004, you can manufacture high-quality circuit breakers that are efficient as well as durable to support aircraft electrical systems.
With obedience and compliance to BS EN 3774-004, you can enhance the efficacy of three-pole circuit breakers and manufacture a standardized high-quality product to ensure the reliability of your products and build trust in their use throughout the aerospace supply chain.