DC Current Transformer and Indicator

Automation and Control Sensors Transducers
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1

I’m looking for a DC current transformer and appropriate display indicator (digital preferred). Can someone help specify a few components that will meet my application?

Here are the details:

-I’ll be measuring the current between the VFD and a motor. So I believe I need a RMS current transducer??

-This will be for measuring a DC current that will not exceed 11.3 amps. So I would like a display that will have pretty good resolution (minimum of one decimal place, more is better) down in the 0-15 amp range.

-The voltage will be varied from 0V to 260V

-I also need to fit the current transducer into a very small enclosure. So smaller current transducers would be best.

Please let me know if you need anything else for this.

Thank you!

2

David welcome to Tech Form
So you are lookin for a Current Sensors ?

3

Hello Robert,

Yes, but the ones in the link you posted are only for AC. I need this for DC and I can’t find them anywhere.

I also need an indicator so I can read the DC current.

Any suggestions?

4

thanks for the question, im also looking for the answer.

5

I am sorry about that here is DC sensors

Click here

6

Hello David, JackJoy123
I was digging into this a little bit and I am not sure what kind of cabling is coming from your VFD but it seems to me that 582-1064-ND would be a good option especially if you are looking to integrate a display. For the display we have a number of options that would be most ideal for integrating with the transducer. https://www.digikey.com/short/r8n5jr9q.

If you have any other questions, please let us know.

7

I found the DC sensors. What is need is a recommendation for the most accurate one that will fit my project criteria.

Project criteria:

  • Measure DC current from 0amps to 15amps. (this is the available amperage range the drive will supply)
  • Voltage going through the wire to be sensed is 0-260V (German machine)
  • Must be as accurate as possible and have a fast response time.
  • Must be able to display the amperage value on an indicator

So what I would like are specific part numbers on what meets this criteria for both a current transducer and indicator.

I see there are lots of options like closed loop, open loop, Hall Effect, etc. I don’t know which ones I should be looking at. I was told that I should get a RMS current transducer, but I don’t know what that means.

8

582-1176-ND is another option
CR5210 CR5220 Response Time: 250 ms

9

I’d kindly suggest that the matter may have become confused by the form in which the question was posed, considering that the output of a Variable Frequency Drive contains little to no DC by definition.

A product such as the ACA-20RM-2-AC4-RL-C might prove sufficient to address the need, at reasonable cost and convenience.

2 Likes
10

thanks for the awesome information.