Hamilton Sundstrand Corporation

Nicholas J Robertson

Donald G Kilroy

Josef Maier

Bernd Löfflad

Bernd Lofflad

A switch arrangement includes a switch with a source lead and a load lead, a sensor coupled to the switch, and a switch monitor. The switch monitor is in communication with the sensor and is responsive to instructions recorded on a memory to receive a measurement of a switch parameter from the sensor, compare the measurement to a baseline associated with the switch, and determine switch margin using the comparison of the measurement with the baseline associated with the switch. Aircraft electrical systems and methods of monitoring electrical systems are also disclosed.

Power distribution health management and monitoring

An apparatus, and a method of controlling a solid state power controller ('SSPC') selectively allows a current through a solid state power control switch in response to the current in a plurality of SSPCS exceeding at least one threshold. A microprocessor module collects power surge data from a plurality of groups of SSPCs, and determines if the amount of power surge data within a group of SSPCs is sufficient to constitute a lightning threat. If the microprocessor module determines a lightning threat is present, the microprocessor module sends a command to certain SSPCs in the afflicted group to lockout an instantaneous trip protection for the duration of the lightning threat, allowing the power surge to pass from the SSPCs to a load or plurality of loads, leaving the SSPCs undamaged.

Increasing the system stability and lightning capability in a power distribution system that utilizes solid-state power controllers

A method of controlling a solid state power controller includes selectively allowing a transient current through a solid state power control switch in response to the transient current exceeding at least one threshold.

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Rockford, IL, United States of America

Nicholas J Robertson