Search

Archive: Category «High Voltage»

Page 11 of 11« First 7891011

Transients – Line Disturbances

Lightning strikes and switching transients on power lines will propagate down the line and eventually arrive at a substation. There, the voltage will be clamped by lightning arresters to a… Read more

Jan 21, 2011 | Edvard

Transients - Line Disturbances

Gas-Insulated Transmission Line – GIL

The gas-insulated transmission line (GIL) is a system for the transmission of electricity at high power ratings over long distances. In cases where overhead lines are not possible, the GIL… Read more

Jan 12, 2011 | Edvard

Gas-Insulated Transmission Line - GIL

SF6 gas as insulating and arc-quenching medium

Sulphur hexafluoride gas (SF6) is employed as insulation in all parts of the installation, and in the circuit-breaker also for arc-quenching. SF6 is an electronegative gas, its dielectric strength at… Read more

Jan 06, 2011 | Edvard

Use Of Vacuum As A Breaking Medium

SF6 and vacuum are the two most modern breaking techniques in the fields of Medium Voltage (from 1 to 52 kV) and High Voltage (> 72.5 kV). They appeared in… Read more

Dec 22, 2010 | Edvard

Fig-1 Evolution Of MV Circuit Breaker Markets In Europe

Basics Of Subtransmission Systems

Subtransmission systems are those circuits that supply distribution substations. Several different subtransmission systems can supply distribution substations. Common subtransmission voltages include 34.5, 69, 115, and 138 kV. Higher voltage subtransmission… Read more

Dec 17, 2010 | Edvard

Transmission Lines

Gas-Insulated Substations – GIS

A gas-insulated substation (GIS) uses a superior dielectric gas, SF6, at moderate pressure for phase-tophase and phase-to-ground insulation. The high voltage conductors, circuit breaker interrupters, switches, current transformers, and voltage… Read more

Nov 10, 2010 | Edvard

Gas-Insulated Substations - GIS
Page 11 of 11« First 7891011


Premium Membership

Get access to premium electrical guides, technical articles and much more!