Aircraft switch and relay inductive-circuit test loads

Present contact-system inductive-circuit test procedure and standard inductors are shown to be inadequate for evaluating the performance of aircraft and missile relays and switches. The need for inductive-circuit testing of contact systems is shown to be critical since contact deterioration is proportional to the energy dissipated in the contact gap which, for inductive circuits, is likely to be many times the energy dissipated in interrupting resistive loads. An inductive test procedure for contact systems and a standard inductor design are proposed which can closely simulate aircraft and missile inductive loads and are calibratable to a practical degree.