BS 2G 132:1981

This standard BS 2G 132:1981 Specification for general requirements for electromagnetically operated contactors for aircraft is classified in these ICS categories:

• 49.060 Aerospace electric equipment and systems

This British Standard specifies the requirements for single and three-pole electromagnetically operated contactors, in the range 25 A to 600 A for use in nominal 28 V d.c. and 115/200 V three-phase 400 Hz a.c. systems in aircraft.

Two environmental classes and two enclosure categories are specified as follows.

• Environmental classes
• Class 1. Contactors suitable for high altitude and wide temperature conditions.
• Class 2. Contactors suitable for lower altitudes and narrower temperature conditions.
• Enclosure categories
• Category A. Hermetically sealed contactors.
• Category B. Non-hermetically sealed contactors.