Assignor
Electricity System Operator EAD – Haskovo Network Operating District (ESO EAD – Haskovo NOD)
Contractor DZZD RETROFIT – Partnership under the Obligations and Contracts Act
Location
Haskovo, Region of Haskovo
Assigned:May, 2020/ Completed:December, 2021
Contract for Rehabilitation of 20 kV cable connections in S/st Dimitar Kanev was assigned to the Partnership RETROFIT in which EL KONTRO is a leading partner. Project was awarded and implemented 100% by EL KONTROL.
The following activities were executed:
• Elaboration of design for primary and secondary commutation;
• Reconstruction of existing trolleys, by replacing oil-filled circuit breakers with vacuum circuit breakers - 34 units;
• Reconstruction of existing trolleys with sectional disconnectors - 2 units;
• Dismantle of existing equipment and installation of new one: current measuring transformers - 6 units, voltage measuring transformers - 72 units, surge arresters - 102 units.
• Substitution of the entire secondary commutation of the Low Voltage Section - 36 cubicles.
• Delivery of all necessary additional materials and equipment for implementation of the project. The main equipment - circuit breakers, measuring transformers, surge arresters and digital relay protection, were supplied by the client.
• Control tests and commissioning of the installed equipment.
Works were carried out in stages, in coordination with the client, complying with the possibilities for switch off the equipment without interrupting the normal operating mode.
