Voltage Detection Circuit
Voltage Detection Circuit
(OP)
Hello,
I am looking to make a small circuit that is capable of detecting 600Vac. All it would need to do is detect if the voltage was present and then turn on a dry contact.
I need it to be small, so I was thinking electronics...otherwise I would just use a PT.
Any ideas...
Regards,
TULUM
I am looking to make a small circuit that is capable of detecting 600Vac. All it would need to do is detect if the voltage was present and then turn on a dry contact.
I need it to be small, so I was thinking electronics...otherwise I would just use a PT.
Any ideas...
Regards,
TULUM





RE: Voltage Detection Circuit
For 600 VAC, you might have to use a low current transformer to step-down to the maximum voltage of this device. Optionally you could put some series high-voltage power zeners to step down for the device.
600 VAC is more in the HVAC realm, so a proper "small circuit" does leaves some questions on isolation, safety, and agency issues. Just what is your application?
RE: Voltage Detection Circuit
More info needed!
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Sometimes I only open my mouth to swap feet...
RE: Voltage Detection Circuit
Basically, I just want to know definitly when the power is on.
With the system it does not matter when it drops out (I was thinking of sealing in the contact after it is picked up)
As far as detecting when it pickups up... it should be in the realm of 80% full voltage (like a relay) or if possible 90-95%.
Just looking for a point in the right direction to a power electronics device that I can start a read on...
Regards,
TULUM
RE: Voltage Detection Circuit
JRaef.com
Eng-Tips: Help for your job, not for your homework Read FAQ731-376
RE: Voltage Detection Circuit
RE: Voltage Detection Circuit
By the time you are done with it, a $15 relay with a 600V coil will be looking pretty good to you.
JRaef.com
Eng-Tips: Help for your job, not for your homework Read FAQ731-376
RE: Voltage Detection Circuit
If you just want to indicate, use a neon lamp with a
resistive voltage divider
If low power is important, use a comparator and divide
down the input VTG.
You can use a series cap to drop the voltage without
generating heat.
Plesae read FAQ240-1032
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RE: Voltage Detection Circuit