OT: CT transducer - PLCS.net

the_msp · March 18th, 2023, 01:35 PM

I have a set of these:

https://www.i-s.gr/files/ND%20Clamp-...20Brochure.pdf

Specifically M1.UM which outputs Voltage.

I am looking to use these Monday for some test measurements into a PQA however it only takes 1A or 5A Current inputs.

Are there any transducers available that will scale this for me?

I have one Rogowski coil here that will sort of let me away, but ideally I'd like 3 phase. My local supplier has no more Rogowskis' in stock right now.

Space is too limited for standard Open-coil CTs.

the_msp · March 18th, 2023, 01:41 PM

Sorry, there are several M1.UM. Mine are 1A:1V

the_msp · March 18th, 2023, 01:53 PM

Something like this is close:

http://www.sil.co.uk/pdf/dtm3u.pdf

The load I'm measuring is motor FLC at 80A, but currently star-delta so a peak inrush is expected.

The PQA is a Janitza 512 Pro, and whilst I've only ever used 1A or 5A input, in the software it lets you select mA.... hmmm...

March 18th, 2023, 01:35 PM	#1
the_msp Lifetime Supporting Member Join Date: May 2008 Location: Northern Ireland Posts: 1,180	OT: CT transducer I have a set of these: https://www.i-s.gr/files/ND%20Clamp-...20Brochure.pdf Specifically M1.UM which outputs Voltage. I am looking to use these Monday for some test measurements into a PQA however it only takes 1A or 5A Current inputs. Are there any transducers available that will scale this for me? I have one Rogowski coil here that will sort of let me away, but ideally I'd like 3 phase. My local supplier has no more Rogowskis' in stock right now. Space is too limited for standard Open-coil CTs. __________________ Regards, Patrick G. B.Eng MIET Making the flashy lights flash since the 90's SCADA - Inductive Automation Gold Integrator \| PLC \| Control Panels \| Robotics \| Training Connect with Matrix Engineering My son was chewing on an electrical cord, so I had to ground him. He is doing better currently and conducting himself properly. My electrical skills are quite poor, which is a shock to some people

March 18th, 2023, 01:41 PM	#2
the_msp Lifetime Supporting Member Join Date: May 2008 Location: Northern Ireland Posts: 1,180	Sorry, there are several M1.UM. Mine are 1A:1V __________________ Regards, Patrick G. B.Eng MIET Making the flashy lights flash since the 90's SCADA - Inductive Automation Gold Integrator \| PLC \| Control Panels \| Robotics \| Training Connect with Matrix Engineering My son was chewing on an electrical cord, so I had to ground him. He is doing better currently and conducting himself properly. My electrical skills are quite poor, which is a shock to some people

March 18th, 2023, 01:53 PM	#3
the_msp Lifetime Supporting Member Join Date: May 2008 Location: Northern Ireland Posts: 1,180	Something like this is close: http://www.sil.co.uk/pdf/dtm3u.pdf The load I'm measuring is motor FLC at 80A, but currently star-delta so a peak inrush is expected. The PQA is a Janitza 512 Pro, and whilst I've only ever used 1A or 5A input, in the software it lets you select mA.... hmmm... __________________ Regards, Patrick G. B.Eng MIET Making the flashy lights flash since the 90's SCADA - Inductive Automation Gold Integrator \| PLC \| Control Panels \| Robotics \| Training Connect with Matrix Engineering My son was chewing on an electrical cord, so I had to ground him. He is doing better currently and conducting himself properly. My electrical skills are quite poor, which is a shock to some people

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