Installation methods
for Line Lightning Protection Devices (LLPDs)
1 piece рег circuit phase alternation: А→ В→ С→ А→ В→ С
Basic recommendations for using LLPD i-series:
Sections of an overhead line located on:
- For grounded poles: steel, concrete or wooden poles with ground lead
- For ungrounded (wooden without grounding) poles (for both bare and covered conductors)
Basic recommendations for using LLPD i-series:
Sections of an overhead line located on:
- Line is surrounded by high objects shielding it from direct lightning strikes (forest, city, over lines, etc.)
- Valley/ravine areas
- Areas subjected to frequent lightning strikes
- Areas with poor accessibility
1, 2 or 3 pcs per pole depending оn:
Basic recommendations for using LLPD d-series:
Sections of an overhead line located on:
- Ground flash density
- Terrain profile
- Shielding factor
- Line geometry
- Footing resistance
- BIL of the line presence of shielding wire
- ... and other factors*
Basic recommendations for using LLPD d-series:
Sections of an overhead line located on:
- Open areas without natural shielding
- Hilly, mountainous areas
- River crossings
- Areas subjected to frequent lightning strikes 3-4 poles before substation (for nominal system voltage < 35kV - considering average span of 50-70 m; considering 35 kV average span
- of 150-200 m)
It is necessary to protect not only the line and insulators from damage and unwanted outages but also the pole-mounted distribution transformers which are deployed along the line.
The main device for transformers protection from lightning surges is a surge arrester. Unfortunately, with frequent activations due to overvoltages, the arrester reaches the limit of its capability and is unable to damp pulses anymore which leads to breakdowns, leaving the transformer unprotected in case of new overvoltage. This is especially true for poles with high values of footing resistance. To avoid this situation, SETREON has developed a solution for protecting arresters and improving the reliability of the transformer.
SETREON recommends installing 3 LLPD d-series on poles adjacent to the transformer and to ground them. In case of DLS or IOV, LLPD limits surge of overvoltage on both sides of the protected transformer, reducing the load on the arresters and preventing the arresters from breaking down.
Thus, the SETREON's solution allows to extend the lifespan of the arresters and as a result provides protection of the transformer.
The main device for transformers protection from lightning surges is a surge arrester. Unfortunately, with frequent activations due to overvoltages, the arrester reaches the limit of its capability and is unable to damp pulses anymore which leads to breakdowns, leaving the transformer unprotected in case of new overvoltage. This is especially true for poles with high values of footing resistance. To avoid this situation, SETREON has developed a solution for protecting arresters and improving the reliability of the transformer.
SETREON recommends installing 3 LLPD d-series on poles adjacent to the transformer and to ground them. In case of DLS or IOV, LLPD limits surge of overvoltage on both sides of the protected transformer, reducing the load on the arresters and preventing the arresters from breaking down.
Thus, the SETREON's solution allows to extend the lifespan of the arresters and as a result provides protection of the transformer.