Life cycle considerations for microprocessor relays

摘要

With proper maintenance, users of older technology electromechanical (EM) relays have considered 50+ years as the normal life cycle for these devices. When applying microprocessor relays new considerations must be taken into account for lifecycle expectations. This paper proposes to examine microprocessor relay life cycle and the sometimes unexpected costs associated with their use. During the course of microprocessor relay life there are inherent costs associated with the maintenance of these devices which are generally not considered but are critical to the performance of the device and the intended application. To be examined is non-planned mission critical updates and product notifications. Microprocessor relay challenges from a manufacturer and user perspective will also be examined. Consideration of the costs associated with extending the service duty of these devices past their intended designed life will be discussed as well as a case study.