In the area of electrical power engineering, ELGRA VISION D.O.O. is engaged in designing, organizing, and executing works from the domain of low (0.4 kV), medium (10.35 kV) and high voltage (110, 220 and 400 kV). These include construction, overhaul and revision of substations, power lines, low voltage and medium voltage divisions, electrical installations in technical and residential buildings, various types of lighting and other electric power facilities.
Revisions and overhauls of transformer stations include testing of power transformers, setting and testing of switching equipment, testing of protection, inspection of the condition of the cable heads and Safety Equipment and others at the usual voltage levels 110/35, 35/10 and 10 / 0, 4 kV, as well as on specific 110 / 25, 10/6, 1/3, 3/1, 1 / 0,4kV voltage levels with frequencies 50, 400 Hz and other…
Testing the insulation resistance of coils
Testing the coil resistance
Thermo-vision transformer testing
Silica gel replacement
Dielectric oil penetration testing
Testing the buholc relay
Testing the contact thermometer
Differential protection testing
Examination of boiler protection
Complete replacement of the sealant
Replacement of NN and VN insulators
Revisions and overhauls with adjusting busbars, switches, output busbars with grounding knives
Testing the voltage drop in contacts
Secondary and primary relay testing
Inspections and overhauls of other equipment:
Distribution and equipment of the 400 Hz aircraft power supply system
Distribution of own consumption 400 / 230 V, 50 Hz
Distribution of own consumption 24,48,110 V, j.s.s.
Distribution boards for supplying inverters and rectifiers
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