The objective of this module is to draw attention to the high voltage hazards that can occur on telecommunication circuits entering substations and power stations, and to review the protection devices that are used to combat this problem. After study of the videotape and the associated workbook the participants should be able to understand the following overall concepts and apply them in their day-to-day activities. They will also be able to answer test related questions on these subjects: Communication line interface, Routing of telephone cables by Telco, Effect on telephone lines of power system faults, Longitudinal common mode induction, GPR - Ground Potential Rise, Remote ground and local ground, High voltage hazards to personnel and equipment, Location of demarcation interface, Standard telephone line protection, Air gap arrestors, Carbon block protectors, Gas tube protectors, Solid-state protectors, Limitations of protectors, Disadvantage of voltage clamping (i.e. circuit shut down), Mutual drainage reactor, High voltage interface, Dedicated entrance cable; features, Grounding of dedicated cable, High voltage special protection, Neutralizing transformer, Neutralizing reactor, Isolation transformers, High voltage relay for DC signals, Safety precautions for personnel, Optical isolators: teleline isolator, TUCON fiber optic link, Fiber optic cable and multiplexer.

If you are taking this course for NERC credit, the following credits will be reported.

NERC CE HOURS: CE HOURS = 4.00 OPS Topics=4.00 Standards=0.00 Simulation=0.00 EO=0.00