Voltage Transducer

bluenoser337 · Aug 10, 2013

I'm looking for a transducer that will take a 600v 3-phase AC input and convert the average phase-to-phase voltage to a 4-20mA or 0-10v output for connection to a PLC. Anyone know of such a beast that isn't in the thousands of $$ ? Thanks!! RB

Lancie1 · Aug 10, 2013

The NK Technologies brand VTR6-420-24L-DIN model is about $180 U.S. and will convert 600 VAC to a 4-20 mA signal.

http://www.tequipment.net/NKVTR.asp

Mickey · Aug 10, 2013

convert the average phase-to-phase voltage

I doubt you will find a transducer to average the three phases and give you an analog output. I think you would have to monitor each phase and do the averaging within the PLC.

Kidblue · Aug 10, 2013

Hi,

Have used these before with a 4-20mA output and using the Modbus interface.

http://www.socomec.co.uk/webdav/site/Socomec/shared/SCP/pdf_catalogue/GB/cat_dirisa4041_gb.pdf

There are several other manufacturers (Schneider also produce a similar range) that should do what you want...may come down to budget.

Regards,

Rob

jdbrandt · Aug 10, 2013

bluenoser337 said:
I'm looking for a transducer that will take a 600v 3-phase AC input and convert the average phase-to-phase voltage to a 4-20mA or 0-10v output for connection to a PLC. Anyone know of such a beast that isn't in the thousands of $$ ? Thanks!! RB

If the voltage you are reading is "across the line", or, directly off the power company grid, anything will work.

IF, OTOH, this is the output of a Variable Drive of some sort, keep in mind that the high frequency components of that signal can cause false readings on traditional transducers (in my opinion)

NetNathan · Aug 11, 2013

How about voltage to ground to use in looking for shorts?

bluenoser337 · Aug 13, 2013

Thanks all!! I think the tequipment unit might do the trick.

Investigation in progress! RB

Voltage Transducer

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