Design and construction of two 20/6,3 kV, 10 МVА Step-down Movable Substations

Maritsa Iztok Mines, Radnevo


Assigned: 2015 / Completed: 2017

Project description

Subject of the contract is elaboration of detailed design and construction of two identical 20/6,3 kV, 10 МVА movable Substations designed for permanent power supply of mining consumers in the Troyanovo-Sever Mine at Martsa-East Mines, Radnevo.


Project envisages installation of 20/6 kV Power Transformer, construction of electro-houses onto concrete foundations, delivery and installation of 20 kV Switchgears and 6 kV Switchgears, 20/0.4 kV auxiliary transformer, three-pole disconnector, rectifier, accumulator battery, inter connected star grounding transformer, and active resistance.

Furthermore, assigned activities include laying and connection of power and control cables, construction of earthing, lightning-protection and lighting installations. Manufacturing and installation of AC and DC auxiliary switchboards, and control panel. Completion of SCADA and wireless data transfer via radio connection. Commissioning works and putting the movable Substations under operation.



Certificate BG          Certificate EN