Current sensor with contact closure

[potts.mike]

I am looking for one of those current sensing donuts that has a contact closer once a certain amperage is passed. I've tried a few searches but must be using the wrong terms because u have not had any luck.

I plan on googling this to a contact closure sensor on a gc-100 for power status of a tv.

 

[RAL]

There are a number of current sensors that could be used for this.  Many have fixed current sensing limits, but some are adjustable.
 
Try searching for "current switch"
 
On eBay, check out the following search terms:
 
Veris h800  (fixed current 0.75A trip, 200A max)
 
Senva c-1200  (fixed current 0.25A trip,  50A max)
 
[Edit: corrected JC model number and current range]:
 
Johnson Controls CSD-CA1G0-1  (or search for "Johnson Controls current switch" )
 
This Johnson Controls sensor is adjustable, and this model can sense a range of 1.25A to 135A.  But it's rather large compared to the other two. There are many other JC models that have different ranges and not all are adjustable, so be careful and make sure the one you purchase can sense the current of the TV .
 
One other thing to note.  Some current switches, like the Veris and Senva models I mentioned, have solid cores and you may have to cut the wire to pass it through the core.  Others, like the JC CSD-CF0A0-1, have split cores that open to allow you to insert the wire without cutting it.   Also, only one conductor of the TV's power cord should go through the core.  If you run both conductors through it, it won't work.

 

[BraveSirRobbin]

http://cocoontech.com/forums/topic/25448-power-monitoring-a-tv/?p=203264

 

[potts.mike]

Thanks for the reference. I guess I should get an extra power cord that I can butcher.

 

[BraveSirRobbin]

Thanks for the reference. I guess I should get an extra power cord that I can butcher.

With the one I referenced, you don't have to 'cut' the cord...you just have to separate the wires from each other.  Also, the one referenced does not require any external power to operate, and can adjust to any trip point desired (within the current range of the model/part number selected).

 

[tmbrown97]

With the one I referenced, you don't have to 'cut' the cord...you just have to separate the wires from each other.  Also, the one referenced does not require any external power to operate, and can adjust to any trip point desired (within the current range of the model/part number selected).

Furthermore, you can increase the current by winding the hot multiple time through the donut - that'll increase the detected voltage with each wind.

 

[BraveSirRobbin]

Furthermore, you can increase the current by winding the hot multiple time through the donut - that'll increase the detected voltage with each wind.

That method is great for current sensors that have an analog output and are not in your desired range.  With this unit, you adjust the point at which the level of current will give you a contact closure, so you really don't want to do multiple wraps.  Also, just a minor correction, it is 'current' and not 'voltage' detected.