RF for communication and data Transfers

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dereckbc

Moderator
Staff member
Location
Plano, TX
Not sure what you are talking about, but as Charlie elluded to if it is for metering the meter has a transponder built into it. When the transponder recieves a properly encoded radio signal, it then transmits it data.

Most of them I have seen a vary low power, where the meter reader drives along say an alley behind the houses, points the antenna at the meter and reads it via RF.

You will also see them in homes where the owner has visious dogs.
 
RF Frequencies

RF Frequencies

I am not sure myself. I am familiar a little with RF circuits. I had put in for a job with Duke power for Electric Trans Tech. Just thought maybe some one familiar with this job and what RF and Digital Circuits for Communications and Data transfer knowledge Duke Power wants. Plus I am interested in knowing all I can about it. Thank You:)
 

tom baker

First Chief Moderator & NEC Expert
Staff member
Location
Bremerton, Washington
Occupation
Master Electrician
1. Find a radio read power meter
2. Note the mfg
3. Google or go to the mfgs web site, you'll find more than you want to know!
Look specifically for instruction manuals.
 

nc5p

Member
Location
Tempe, AZ
A lot of SCADA RTU's use radio links. Some are pole mounted to switch capacitor banks or load break switches to tie feeders together. Microwave links at substations are used for SCADA, protective relaying, and telemetry. There are also the "wired" RF links, known as current carrier used on transmission lines. Those are easy to spot at the substation as there is a big trap coil on one of the conductors. Fiber is replacing a lot of those systems but they are still in widespread use.
 

mdshunk

Senior Member
Location
Right here.
It's not exactly in the RF range, but some utilities are still using the 720 cycle signal to turn on or off load switches installed at a customer's premises.
 
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