Power/Teleco Separation

[Stonemug]

What is the proper method/procedure for separation between power facilities and telecommunication cable, when feeding a telecommunications circuit to a power station? I was under the impression the power company would provide a fiber network for the telecommunications company to attach to, for proper separation? Any help would be greatly appreciated.

 

[dpc]

Use of fiber is one option. The concern is ground potential rise (GPR) during faults on the power system that could cause the telco ground potential to rise above remote earth, causing safety concerns for other telco customers. The copper-to-fiber conversion has to be far enough away from the power station to keep the GPR at a safe level.

Another approach is use of telephone line isolation equipment that will provide isolation and protection of the incoming telco copper line from GPR. Check out

http://www.positronpower.com.

 

[k2panman]

The communications cable must not bring a grounded conductor into the substation, particularly to prevent currents from flowing in the conductor during faults on the power system. We installed fiber optic cable into our substations, and I mistakenly bought some "all dielectric" underground optical cable that had a metallic armor. We didn't use this because the armor needed to be grounded - so we got some true all dielectric optical cable to bring int the substations.

K2ofKeyLargo

 

[toiap]

I have used the positron equipment on numerous jobs. It works very well.