Container power sensing system and method
First Claim
1. A monitoring system for a refrigeration unit in a shipping container, said shipping container having a power line connected to the refrigeration unit, wherein the power line is 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, said monitoring system, comprising:
- an electrical transient sensor connected to a power line the container, anda 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.
13 Assignments
0 Petitions
Accused Products
Abstract
An automated and/or remote method for identifying and/or changing the source of power for these generator sets, which may apply to any environment where there are alternative sources of power available which must be managed remotely (such as for other powered containers not used for refrigeration transport).
18 Citations
19 Claims
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1. A monitoring system for a refrigeration unit in a shipping container, said shipping container having a power line connected to the refrigeration unit, wherein the power line is 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, said monitoring system, comprising:
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an electrical transient sensor connected to a power line the container, 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. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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2. A method for monitoring a refrigeration unit in a shipping container having a power line connected to the refrigeration unit from 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, comprising:
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monitoring electrical conditions of the power line; delivering an indication that the power line is connected to a genset or not, said step of delivering, including sensing transients in the monitored electrical conditions; comparing the value of the transients to a threshold; and transmitting a signal indicative of whether or not a transient exceeds the threshold to a user as an indication of the power line being connected to a genset or not. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification