Technical Notes
Short, practical notes from our site teams on how power network work is planned, executed and checked.
How Lattice Towers Are Erected on 380 kV and 500 kV Lines
The sequence a tower erection crew follows on an extra-high-voltage line: material segregation, ground assembly, lifting, bolt torquing and locking, and what the inspector checks before stringing.
Read the noteReplacing a 33 kV Ring Main Unit: How the Outage Is Planned
What a contractor surveys, prepares and tests when a 33 kV RMU is replaced, so that the outage is short and the unit is energised first time.
Read the noteWhy Medium-Voltage Cable Joints Fail, and How Jointing Prevents It
The workmanship errors behind most MV cable joint failures, why a joint can pass its test and still fail later, and the controls that prevent it.
Read the note