Electrical engineering

We have experience in various electric engineering fields – laboratory and field tests, laboratory design, energy management and power engineering. We have extensive experience in conducting precise measurements for industrial applications.

Furthermore, we work jointly with High-voltage Laboratory of the Technical University of Sofia, which is a convenient place for the design of complex solutions and tests of completed products in the field of electrical power distribution. The laboratory gear includes an auto-transformer 40kVA, an AC testing transformer 700kV / 0,5A, light impulse voltage generator 750kV and measuring equipment up to 750kV.

We design electrical installations and products such as:

  • Non-standard automated laboratories for conducting various electric tests

  • Energy management systems (EMS) with Ignition SCADA

  • Commissioning of VFD (Variable Frequency Drives)


Design & Solutions

Automated laboratories for conducting various electric tests

Automated and autonomous laboratories for conducting electric tests are very good solution when a manufacturer wants to certify that his products meet certain quality standards. This is applicable to manufacturers producing wire and cables, electric motors, transformers and other electrotechnical products.

Energy management systems (EMS)

The energy management systems designed by us include measurement, monitoring, analysis, control and management. Furthermore, we can conduct analysis of the current state and offer possible energy-saving solutions.

Reports:

  • Reports

  • Monthly reports on consumption

  • Consumption reports on machines and workshops

  • Reports on a 10-minute basis

  • Reports for any period of time – for emergencies

  • Report on the Common Energy Balance

  • Alarming in case of disturbance of energy parameters

  • Load Schedules

Parameters

  • RMS I1, I2, I3

  • RMS U1, U2, U3

  • Active power

  • Reactive power

  • Full power

  • Network Frequency

  • Phase angles

  • Cos phi

  • Power factor

  • Harmonics analysis

  • Min, Max, Average values

  • Etc

more about Energy and High Voltage laboratory

High Voltage Laboratory

Tests Performed

  • Standard high voltage testing

  • Testing and evaluation of porcelain, glass and composite insulators (dry and wet, withstand and flashover)

  • Testing of bushings

  • Testing of switchgear, disconnecting switches, and circuit breakers

  • Testing and commissioning of power cables and accessories

  • Testing of power transformers (partial discharge and impulse tests)

  • Testing of SF6 insulated equipment

  • Testing and evaluation of instrument transformers

  • Partial discharge testing of equipment

  • Evaluation and analysis of transformer condition and faults

  • Correspondence to standards

  • 50 Hz dry & wet voltage flashover test

  • Lightning impulse voltage withstand and flashover test

  • Corona test (electrical and visible image detection)

  • Tan delta measurement (24kV; 0,1Hz)

  • Insulation watts loss test

Laboratory

High Voltage Lab Testing Services

  • Maximum impulse voltage: 750 kV

  • Maximum 50 Hz voltage: 700 kV

Test Facilities

  • Indoor HV lab dimensions: 17 m (l) x 10 m (w) x 11m (h)

AC Test Equipment

  • Test transformer: 50Hz, 700 kV, 0.5 A Cont.

  • Capacitive voltage divider: 700 kV

  • Resistive voltage divider: 750 kV

  • Digital oscilloscope

  • Radio interference voltage (RIV) meter

Impulse Voltage Test Equipment

  • Impulse generator: 750 kV, 1,2 kJ

  • Capacitive voltage divider: 750 kV

  • Resistive voltage divider: 750 kV

  • High-resolution digital recording system

  • Digital oscilloscope

  • Storage analogue oscilloscope

DC Voltage Test Equipment

  • DC generator: 125 kV, 100 mA

  • Resistive voltage divider: 750 kV

Mechanics

We design physical or mechanical systems, such as power and energy systems, kinematic chains, transmissions, powertrains, hydraulic systems and metal structures.

We work on the creation and manufacturing of complete solutions and products. Therefore, we are responsible not only for the ideation, design, and engineering of the products, but also had the task for sourcing of necessary parts and materials and have supervised the actual manufacturing process and subsequent tests.


We design and engineer physical or mechanical systems, such as:

  • kinematic chains

  • transmissions

  • powertrains

  • hydraulic systems

  • pneumatic systems

  • metal structures.

Automation

We design, develop and manage control and supervision systems by combining information flows, hardware configurations and software solutions.

Efficiency, flexibility, and productivity are decisive success factors for the industry and engineering plays a central role in the automation process as it relates to ever more complex machinery and plants. There is a need for greater integration of information technologies and automation equipment. Today, this process has been labelled Industry 4.0 or smart factory.


The design of an automation system may include the following:

  • Initial research and assessment

  • Object research, functions definitions and area of the control system

  • Control system layout and process flow sheets

  • Business and Technical requirements

  • Software development:

    • SCADA development

    • PLC programming

    • HMI programming

    • Other

  • Design, engineering and construction of automation control systems

  • Design, engineering and construction of industrial communication infrastructure

  • System configuration and parameters definition

  • Setting up of alarm events

  • Simulations

  • Training

  • Support

Measurement equipment

We have an extensive experience in setting up, programming and using the industrial measurement equipment of our partners: Laurel Electronics, Sonel, Status Instruments, Wago, Allen-Bradley and etc.

You can find more information on our web store and you can always contact us for further questions.


Laurel Electronics:

Sonel:

Status Instruments

  • Temperature Transmitters
  • Rail Mounted Temperature Transmitter
  • Signal Conditioners / Trip Amplifiers
  • Loop Powered Isolators, Converters, Splitters
  • Temperature Probes, Thermowells, Connection Heads
  • Exia , Exd Hazardous Area Products
  • Loop Powered Indicators
  • Panel Meters
  • Battery Powered Process Gauges
  • Pressure Transmitters
  • Humidity Transmitters
  • Infrared Temperature Sensor
  • Wireless Temperature Transmitter
  • Sub Sea Temperature Measurement

Software

We are focused on industrial software development – HMI, PLC, SCADA, MES, IIoT as well as Linux, Apache, PHP, MySQL and others that are directly related to our engineering projects.

We have significant expertise in the following technologies:


  • Ignition – we are certified integrator of Ignition SCADA and we use this software platform as a tool to build SCADA, MES, EMS and IIoT solutions. Ignition has a historian based on SQL Databases and a powerful OPC-UA server.

OPC is the method used to connect to devices like programmable logic controllers (PLCs) and programmable automation controllers (PACs), which are the foundation for most industrial automation systems. In the automation industry, OPC functions similarly to how printer drivers function on a personal computer. Without it, devices just aren’t able to understand each other and work together. OPC-UA is a unified architecture for OPC. It’s the next generation of OPC standards created to provide a more uniform and reliable framework for accessing real-time and historical data.

  • Human Machine Interface (HMI) – the interaction between an operator and input devices such as touch screen panels, buttons, and switches. For HMI programming we use Ignition, е!COCKPIT and our own web-based Siviko OS. We follow the methodology of the High-Performance HMI.

  • Programmable Logical Controller (PLC) – PLC software can be found in industrial or building automation controllers responsible for the automation of electromechanical processes. Our engineers can create PLC software in accordance with the IEC61131 standard: ladder logic, structured text, function block diagram and sequential function chart. We have experience in working with PLCs from Siemens, Allen Bradley and CodeSys-based controllers such as WAGO, Schneider Electric, and others.

  • SQL Databases – SQL-compatible databases are the most popular databases in the world, used to store information of all types in every industry you can imagine. Even though SQL databases are standard for many enterprise solutions, this is not the case in industrial automation, where are used proprietary process historians. This allows us to break away from them and to create powerful solutions that any IT department can easily support. We use mainly MySQL.

  • Software programming – we use programming in our SCADA integration or other automation projects as this allows us to offer custom-made solutions. We often use Python, HTML5, PHP and etc.

  • Networking and communication EtherCAT, EtherNet/IP, PROFINET, POWERLINK, SERCOS III, CC-Link IE, Modbus TCP etc.

  • For Microcontroller Embedded Software Development we use mainly ANSI C and C++.

  • We see the future of industrial automation in software such as Linux, Apache, PHP, MySQL (LAMP).

Manufacturing

We manufacture and assemble our products and non-standard projects in-house.

We have the capacity to organize the manufacturing and assembly of our product and non-standard projects, such as:

  • Wire Pay-off machines, such as WPO-850

  • Automated Bobbin Winders, such as AWB-800

  • Other non-standard machines by

  • Custom-made metal constructions and details of small and medium size

We do the assembly on our own to ensure product quality and timing. This allows us to perform continuous tests throughout the assembly process and to innovate with different solutions.