Aircraft contactors

THE growing complexity of the electrical systems in use on modern aircraft has given rise to need for a complete line of magnetically operated switches or relays suited to conditions encountered in this type of service. Relays may be classified according to use as control relays and power relays, or in the terminology of the industrial-control engineer, relays and contactors. This paper will be confined to a discussion of power relays or contactors. Most aircraft in use at the present time have 24-volt d-c systems; consequently only low-voltage d-c contactors will be considered.