Considering the damage that was experienced nearby, You got off easy.
#1 Paul Kepler on 2013-11-18 18:34
It is good thing that the damage wasn't more severe. The most important thing is that nobody got hurt or killed from the storm. Look what happened in Washington, Illinois.
#2 Wally Unglaub on 2013-11-18 22:19
are the power lines on those poles, particularly what I take to be the 3ph 25kv line on the top crossarms live? C Kronenwetter IRM member
#3 c kronenwetter on 2013-11-23 22:15
At the time the photos were taken everything was still live and operating. Max Tyms
#3.1 Max Tyms on 2013-11-28 14:44
I believe they are 4160 volts (measured line to line with 2400 from each line to ground). That's the voltage at which the utility delivers power to the museum. Yeah, the size of the insulators would have you think it is more. But where does it go? Is there a substation down the line? Steve
#4 Steve on 2013-11-27 09:56
ComEd delivers 34KV to the museum to a 1MW transformer that drops it down to 4160.
#4.1 Jamie K on 2013-11-28 06:44
The section of line that was damaged was built to resemble a typical interurban railroad. The top arm is 34kV construction resembling the sub-transmission line which would have supplied substations along the route of a railroad. In this case, It is 2400/4160 volt distribution that feeds the signal system for the entire 5 mile railroad. Near each signal location there is a transformer that reduces the voltage to 120 volts. At each signal hut the transformer supplies 120/240 volts due to the increased power requirements in the hut. Max
#4.2 Max TYyms on 2013-11-28 14:39
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