Installations and computer software for heavy-current engineering and for conducting, transforming, accumulating, regulating or controlling electricity, power, current and voltage; Installations and computer software for influencing and controlling of power supply systems and power supply networks, and for influencing, controlling, safeguarding and improving quality of supply in power supply systems and power supply networks; Electricity transformers; Electricity transformers; Regulating transformers; Step transformers; Quadrature boosters; Converter transformers; Furnace transformers; Adjustable local network transformers; Installations for influencing and controlling energy flows in alternating current networks; Flexible AC transmission systems (FACTS); Unified power flow controllers (UPFC); Current transformers; Installations for controlling reactive power; Static synchronous compensators (STATCOM); Installations for controlling and compensation of reactive power without using rotating machines; static var compensators; Reactive power compensation installations; Adjustable and non-adjustable throttles and capacitors for reactive power compensation; Power controllers; Power factor correction filters; Analogue and digital filters; Network filters; Harmonic filters; Resistors; Switching apparatus; stepping switches; Advance retard switches (ARS); Motor drives, transition resistances and polarisation resistances for step switches; Installations and computer software for weak-current engineering, measuring technology, computer technology, regulating technology and control technology; Installations and computer software for actuating, regulating, controlling, monitoring and testing of transformers, installations for influencing and controlling energy flows in alternating current networks, flexible AC transmission systems (FACTS), unified power flow controllers (UPFC), converters, installations for controlling reactive power, static synchronous compensators (STATCOM), installations for controlling and compensation of reactive power without using rotating machines, static reactive power compensators, reactive power compensation installations, adjustable and non-adjustable throttles and capacitors for reactive power compensation, power regulators, power factor correction filters, analogue and digital filters, network filters, harmonic filters, resistances, apparatus for commutation, step switches, advance retard switches (ARS) and of motor drives for step switches,; Installations and computer software for monitoring and testing of the operating state and operational ability of transformers, installations for influencing and controlling energy flows in alternating current networks, flexible AC transmission systems (FACTS), unified power flow controllers (UPFC), converters, installations for controlling reactive power, static synchronous compensators (STATCOM), installations for controlling and compensation of reactive power without using rotating machines, static reactive power compensators, reactive power compensation installations, adjustable and non-adjustable throttles and capacitors for reactive power compensation, power regulators, power factor correction filters, analogue and digital filters, network filters, harmonic filters, resistances, apparatus for commutation, step switches, advance retard switches (ARS) and of motor drives for step switches; Mechanical, electromechanical, electric, electronic and sensor-based measuring equipment, regulating equipment and monitoring equipment; Calculating machines; Processors (central processing units); Regulating apparatus and controlling apparatus, in particular electric, electronic, automatic and programmable apparatus; Electric and Electronic control systems; Computer software, in particular for controlling industrial processes; Laboratory instruments [other than for medical use]; Measuring instruments; Sensors, in particular electric, electronic, electro-optic, fibre optic, acoustic, optical, photoelectric and piezoelectric sensors and for installation control and engine control; Sensors for acceleration, pressure, temperature, liquid level, flow of liquids and gases, moisture, surface waves, acoustic surface waves, sound, for electric current, voltage, energy, power, impedance and power factor and for analysis of dissolved gases; Sensor switches; Synchro sensors; Ultrasonic sensors; Microwave sensing apparatus; Individual parts and assemblies for the aforesaid gases.

Planning, assembling, commissioning, maintenance, servicing, inspection, repair and improvement of installations and equipment for heavy-current engineering and for conducting, transforming, accumulating, regulating or controlling electricity, power, current and voltage; Planning, assembling, commissioning, maintenance, servicing, inspection, repair and improvement of installations and equipment for influencing and controlling of power supply systems and power supply networks, and for influencing, controlling, safeguarding and improving quality of supply in power supply systems and power supply networks; Planning, assembling, commissioning, maintenance, servicing, inspection, repair and improvement of transformers, installations for influencing and controlling energy flows in alternating current networks, flexible AC transmission systems (FACTS), unified power flow controllers (UPFC), converters, installations for controlling reactive power, static synchronous compensators (STATCOM), installations for controlling and compensation of reactive power without using rotating machines, static reactive power compensators, reactive power compensation installations, adjustable and non-adjustable throttles and capacitors for reactive power compensation, power regulators, power factor correction filters, analogue and digital filters, network filters, harmonic filters, resistances, apparatus for commutation, step switches, advance retard switches (ARS) and of motor drives for step switches; Planning, assembling, commissioning, maintenance, servicing, inspection, repair and improvement of installations and equipment for weak-current engineering, measuring technology, computer technology, regulating technology and control technology; Planning, assembling, commissioning, maintenance, servicing, inspection, repair and improvement of installations and equipment for actuating, regulating, controlling, monitoring and testing of transformers, installations for influencing and controlling energy flows in alternating current networks, flexible AC transmission systems (FACTS), unified power flow controllers (UPFC), converters, installations for controlling reactive power, static synchronous compensators (STATCOM), installations for controlling and compensation of reactive power without using rotating machines, static reactive power compensators, reactive power compensation installations, adjustable and non-adjustable throttles and capacitors for reactive power compensation, power regulators, power factor correction filters, analogue and digital filters, network filters, harmonic filters, resistances, apparatus for commutation, step switches, advance retard switches (ARS) and of motor drives for step switches; Planning, assembling, commissioning, maintenance, servicing, inspection, repair and improvement of installations and equipment for monitoring and testing of the operating state and operational ability of transformers, installations for influencing and controlling energy flows in alternating current networks, flexible AC transmission systems (FACTS), unified power flow controllers (UPFC), converters, installations for controlling reactive power, static synchronous compensators (STATCOM), installations for controlling and compensation of reactive power without using rotating machines, static reactive power compensators, reactive power compensation installations, adjustable and non-adjustable throttles and capacitors for reactive power compensation, power regulators, power factor correction filters, analogue and digital filters, network filters, harmonic filters, resistances, apparatus for commutation, step switches, advance retard switches (ARS) and of motor drives for step switches; Planning, assembling, commissioning, maintenance, servicing, inspection, repair and improvement of mechanical, electromechanical, electric, electronic and sensor-based measuring equipment, regulating equipment and monitoring equipment; Planning, assembling, commissioning, maintenance, servicing, inspection, repair and improvement of calculating apparatus, central processing units (processors), regulating apparatus and controlling apparatus, electric and electronic control systems, laboratory apparatus, measuring apparatus, sensors, sensor switches, synchro sensors, ultrasound sensors, microwave sensor apparatus.