Overhead Lines
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Working on De-Energized Electric Circuits, Networks & Equipments
De-Energized Work procedure & Safety in Electrical Engineering Introduction Electricity presents to the workers and installations different hazards and for this reason local operations and maintenance of electrical equipment should…
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Electrical Shock Hazards & Its Effects on Human Body
Electrical Shock Hazards & Effects What is Electrical Hazard? Electrical hazard or Electric Shock may be defined as “Dangerous event or condition due to direct or indirect electrical contact with…
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Protective Actions to Avoid & to Reduce Electric Hazardous
Protective Actions to Reduce & Avoid Electric Hazardous General Rules As general safety rules for EHV, HV and MV installations (EHV: Extra High Voltage – V ≥ 150 kV. HV:…
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Treeing in XLPE Insulated Medium & High Voltage Cables
Electrical Treeing in XLPE Insulated MV & HV Cables (Manuel Bolotinha) Nowadays XLPE (Cross-linkedpolyethylene) is the most used insulation material of medium and high voltage cables, which presents important advantages over…
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MV & HV Cable Termination to Equipment & Joints
Medium & High Voltage (MV & HV) Cable Termination & Joints General Problems & Factors for Termination Terminations to indoor switchgears, electric motors, power transformers, instrument transformers and other electrical…
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Types & Characteristics of Surge Arresters
Surge Arresters – Types & Characteristics Introduction Atmospheric lightning phenomenon on overhead lines and bare conductors or metallic structures of an outdoors substation and over voltages due to switching operations…
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Electrical Transmission Networks – EHV and HV Overhead Lines
Electrical Transmission Networks and Overhead Lines Generally, EHV and HV (High Voltage; 60 kV ≤ V < 150 kV, EHV: Extra High Voltage; V ≥ 150 kV) is used for…
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Electric Stress Control in Cable, Joints & Terminations
How to Control Electric Stress in Cable Joints & Terminations? Introduction Power cables are of great importance in power transmission and distribution systems. Terminations and joints are the basic accessories…
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Busbars and Connectors in HV and EHV installations
Busbars and Connectors in Indoor & Outdoor Installations What is Electric Busbar? A conductor or group of conductor used to collect the power from incoming feeders and distribute to the…
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Overhead Lines Protection – Faults and Protection Devices
Overhead Lines Faults & Protection in Power System Common Faults in Overhead Lines The most common causes of faults in overhead lines are: Aircraft and cars hitting lines and structures…
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