I am currently designing a system and have run into a few hurdles. The system includes two motors. One 0.5kW and one 7.5kW. I need to monitor the current for each one and display the current on the enclosure. Normally this would not be an issue. However the display window is extremely limited and I only have enough room for one ammeter. My plan is to use two current transformers feeding the one ammeter but have a switch in line to allow switching between the two current transformer feeds. In theory this would allow monitoring of both currents without interrupting the main supply and allow me to use one ammeter.
I am having difficulty sourcing an appropriate CT for the 0.5kW motor. The current rating will be between 0 and 2 amps. This is fairly low. I also have the issue of potential losses or inaccuracy due to the switching. My cable is 2.5mmSQ.
Does anyone have any suggestions or recommendations? The main goals is to be able to monitor two separate currents but only using one ammeter.
Thanks
I am having difficulty sourcing an appropriate CT for the 0.5kW motor. The current rating will be between 0 and 2 amps. This is fairly low. I also have the issue of potential losses or inaccuracy due to the switching. My cable is 2.5mmSQ.
Does anyone have any suggestions or recommendations? The main goals is to be able to monitor two separate currents but only using one ammeter.
Thanks
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