Patent ID: 8284066
Filing Date: 2012-10-09
Classification: F25B,F25D,H04Q

Abstract:
1. A shipping container, comprising: a refrigeration unit; a power line connected to the refrigeration unit; said power line being connectable to one of a utility power source or a shipboard power source subject to limited transients in response to refrigeration unit load changes on the one hand and an engine driven genset subject to higher transients in response to refrigeration load changes on the other; an electrical transient sensor connected to the power line of the container and having an output revealing the existence of a transient, and a two-condition threshold indicator switch responsive to the output of the transient sensor; said threshold indicator switch exhibiting one of two conditions; one of said conditions indicating a transient beyond a threshold as a demonstration that the power line is connected to the genset; and a threshold-exceeding transient condition transmitter.