Earthing of high voltage conductors with earthing lances

Earthing and short-circuiting forms an important part of work on or in the vicinity of electrical installations.

In substations, earthing lances form the short circuit-proof connection between high voltage conductor (bus bar or other types of conductor) and the earthing system. 

Portable or stationary

Both systems are designed for a maximum short circuit load of 80 kA / 0.5 s and a peak load of 200 kA.

Usually portable earthing lances can be used up to a conductor height of approximately 8 m.

For conductor heights above 8 m, stationary earthing lances apply. These can be used with little effort for conductor heights up to 12 m.