A 132 kV circuit running 80 km between two substations, built with a two conductor bundle of 400 mm2 ACSR per phase, will carry about 150 MVA and los...

At a 132 kV site, one loose busbar connection can turn a routine switching operation into a multi-hour outage. A high-voltage electrical substation ...

Closing a circuit breaker a few milliseconds too early or too late can turn a routine switching operation into a serious electrical disturbance. Ener...

Ask five people in the electrical trade what counts as high voltage work and you will get five answers. A plant technician changing a 480 V feeder br...

A 10 kV substation energizes the same shunt capacitor bank twice a quarter. Every close operation produces an inrush current that peaks at six to eig...

A 35 kV feeder stops at the fence of an industrial park. The utility needs a switching point it can operate safely. The plant needs 400 V at the end ...

Energizing a 10 MVA transformer is not supposed to be dramatic. In an uncontrolled medium-voltage switchboard, however, it often is: the breaker clos...

When a 110 kV circuit breaker fails to clear a fault, the consequences do not stay inside the substation fence. Downstream feeders lose supply, the d...

Electric Power Quality Problems Start Inside the Plant On a hot summer afternoon, an automation packaging line at a metal products plant kept trippin...

A 400 kW compressor starts on the far side of the plant, the workshop lights dip for half a second, and three variable speed drives on the packaging ...

What Is a Dry-Type Transformer? A dry-type transformer is an electrical transformer that cools and insulates its windings using air, resin, or anothe...

The Direct Answer: How High Voltage Lines Should Be Arranged A well-planned high voltage line layout keeps conductors at safe vertical and horizontal...