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Power-User

Join Date: Jul 2011
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Optical Transducer

04/15/2018 11:56 AM

we want to send line current from a 5A CT to a remote control center for monitoring.any idea about some transducer model from reputed manufacturer that can convert 5A CT current to 4~20mA with optical port for remote communication.regards

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Guru

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#1

Re: optical transducer

04/15/2018 12:12 PM

Go ahead, nobody's stopping you.

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Power-User

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#2
In reply to #1

Re: optical transducer

04/15/2018 12:20 PM

i do not think so , you are trying for last 5 years

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#7
In reply to #2

Re: optical transducer

04/16/2018 6:31 AM

There must be a reason for that.

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#8
In reply to #2

Re: optical transducer

04/16/2018 4:16 PM

I thought I was encouraging you.

#2

Disregard: NEC or IEC? Electrical Standards Listed by Country - E&S Grounding

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#3

Re: optical transducer

04/15/2018 12:22 PM
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#4

Re: Optical Transducer

04/15/2018 10:40 PM

http://www.kiscurrentsensors.com/ is the new organization that has taken over the manufacture of Riley Instruments, in business for over 40 years, I believe.

These are loop powered instruments that I have used and applied for the past 30 years or so. Just need to check the sensor diameter to match it up to your conductor, and select the primary current rating.

Not sure what further information beyond the milliamp output you might need for an optical port, this sort of an instrument is very simple. Measure 1 signal, 1 signal output. If you are referring to optical isolation from the ac line, the loop signal is galvanically isolated from the ac line, and has never presented even the hint of a problem when applied with many different manufacturer's analog input modules, even single ended input channels with multiple instruments, and poor to non-existent shielding practices.

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#5

Re: Optical Transducer

04/16/2018 5:47 AM

Try this.

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#6

Re: Optical Transducer

04/16/2018 5:52 AM

<...reputed manufacturer...>

What sort of reputation is sought, please (rhetorical question NNTR)?

One of the ways of doing a poll is to put each manufacturer's name separately into a response to the original posting in a list below, and inviting CR4 contributors to vote on them by clicking on the "good answer" button for each one.

Attempts to do this in the past have always net with a nil response, though.

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#9

Re: Optical Transducer

04/17/2018 9:06 AM

If you are looking for a manufacturer of good utility-grade electrical transducers, you could explore the RIS (Rochester Instrument Systems)/Scientific Columbus brands of transducers from Ametek Power Instruments, or else the products of Transdata. Both of these are used in utility and power distribution industries, and I have seen good quality and accuracy.

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#10

Re: Optical Transducer

04/18/2018 8:46 AM

You might go the route of 4-20 mA to ethernet & ethernet to fibre. e.g.

https://www.cometsystem.com/products/web-sensor-p2520-two-channel-remote-0-20ma-inputs/reg-P2520

http://www.fibrefox.co.uk/ccs-media-converters/33377-st-multimode-100mbps-fibre-media-converter.html

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