What should the inspection and maintenance of a substation include?

Revision and maintenance of the substation

What all should be done in the inspection and maintenance of a high-voltage substation?


If your company or business has a substation on its property, it is essential that it is looked after, and it is important that all the necessary inspection and maintenance work is carried out to keep it running properly.

Our company places a high emphasis on comprehensive maintenance and inspection of all equipment in order to determine the exact condition and prevent breakdowns.

Substation maintenance is important for the safety and reliability of the electricity supply. Regular maintenance helps prevent breakdowns and prolongs the life of the equipment.

Core Activities Include:

  • tranformer check - checking for leaks, insulators, temperature and correct setting of fuse values;
  • inspection of HV distribution systems - inspection of HV switchboards, accessories, fuses, section switch and other components;
  • check of LV distribution - check of low-voltage switchgear, fusing, temperature of connections;
  • grounding check;
  • checking safety warnings and warning notices;
  • documentation control;
  • control of the Local Operating Regulations;
  • checking the condition of cables and leads, including checking for insulation and mechanical damage.
  • Lubrication of the equipment to help prolong life.
  • many other activities to check the condition of the substation.
  • Replacement of worn parts.

Distribution of substation maintenance

  • Regular maintenance that is carried out at regular intervals, usually once every year or two years.
  • Preventive maintenance, which is carried out on the basis of predicted failures or on an as-needed basis.
  • Reparative maintenance, which is carried out in the event of a breakdown.
  • Revision of HV and LV switchboards.
  • Reconstruction of the substation.

read more in our article: Revision of HV and B

Act No. 251/2012 Coll. on Energy Efficiency

Decree No. 254/2012 Coll. on technical requirements for electrical equipment

Decree No 255/2012 Coll. on technical requirements for electrical equipment in operation