Earthing lightning arrester
Earthing lightning arrester
(OP)
Dear friends,
please advice regarding method of earthing LA at distribution line. In our current practice 13.8 kV line with using pipe pole, the LA is always earthed to gound via pole (brazed), but our new study shown that the earthing of LA must be via a special wire to reduce impact of surge impedance at pole.
Is it realistic??
please advice regarding method of earthing LA at distribution line. In our current practice 13.8 kV line with using pipe pole, the LA is always earthed to gound via pole (brazed), but our new study shown that the earthing of LA must be via a special wire to reduce impact of surge impedance at pole.
Is it realistic??






RE: Earthing lightning arrester
RE: Earthing lightning arrester
This surge current has high frequency components and the added inductance of a steel conductor will present a high impedance.
RE: Earthing lightning arrester
Actually our pole design is using pipe pole, and static wire is barecooper 35 mm.
If we consider that the impedance of barecooper is lower than pipe, this method is okey, otherwise...
RE: Earthing lightning arrester
RE: Earthing lightning arrester
For certain pole, we also ground the static in order to get lower system impedance.
RE: Earthing lightning arrester