BS ISO 20949:2018,Aircraft – Smart contactor – General requirements.BS ISO 20949:2018 pdf download for free.
BS ISO 20949:2018 specifies the definitions, titles of design and general requirements and test methods to determine the performance of smart contactors for use in aircraft electrical power systems. The smart contactor consists of a switching driving circuit and a power switch for protection, action on control signals, and providing status information.
BS ISO 20949:2018 provides general requirements of the smart contactor for aircraft.
Smart Contactor based power distribution systems are emerging among advanced aircraft applications, especially among More Electric Aircraft and All Electric Aircraft. Standardization is increasingly needed for Smart Contactors in aircraft power systems based on intelligent high current switching and protecting technology.Those systems have the potential for higher reliability and longer operating life, with higher capability for status sensing, over-current protection, lower maintenance costs, higher flexibility of designing power switching as well as protecting performance compared with conventional contactor switched systems.
In order to satisfy the purpose of this document, requirements such as physical, environmental and
individual items are specified in accordance with the detail requirements that are issued individually.
Normative references
ISO 1540, Aerospace – Characteristics of aircraft electrical systems;
ISO 2678:1985, Environmental tests for aircraft equipment – Insulation resistance and high voltage tests
for electrical equipment;
ISO 7137:1995, Aircraft- Environmental conditions and test procedures for airborne equipment.