Furnas 47VA32D Voltage Monitor

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BrianMuir

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Comox BC
Hi,
I'm dealing with one of these on a project and as far as I know it is still working, but I would like to find a data sheet. It looks like when Siemens acquired Furnas they buried the old spec sheets.

By the way, the part # definitely has a "D" as the last character. A similar # with an H seems to be out there in some warehouses. (but so far I haven't found a data sheet for that either).

Failing that, if someone can confirm that this guy simply trips out on an undervoltage condition on any phase line that would be helpful.

If I decide to call for replacement, do you have a favorite modern equivalent?

thanks
FF

photo attached
 
We always refered to them a "phase failure relays". By the size it looks like an older model . They are much smaller today.
 
friendlyfire said:
so it trips out if any phase line drops below the preset level?
Click to expand...

It's supposed too. It looks like yours is monitoring 3 phases and then breaking a control circuit with the 2 wires on the right.

Our shop uses phase fail relays made by Timemark. They plug into an 8 pin octal relay base.
 
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