Electrical Engineering Institute

1. KONČAR – Electrical Engineering Institute, Inc.
Zagreb, Croatia
Miroslav Poljak, Ph.D

2. Institute for research, development,
diagnostics, certification and monitoring in
energy conversion and power management
Forty five years of experience in research and
application of scientific achievements
Specialised laboratories and teams of experts for
application of new technologies

3. ENGINEERING FOR PLANT
INSTALLATION & COMMISS.
ELECTRIC VEHICLES
METAL STRUCTURES
ELECTRONICS AND
INFORMATICS
INSTRUMENT TRANSFORMERS
DISTRIBUTION AND SPECIAL
TRANSFORMERS
SWITCHGEAR
MEDIUM VOLTAGE APPARATUS
HIGH VOLTAGE SWITCHGEAR
GENERATORS AND MOTORS
POWER PLANT AND ELECTRIC
TRACTION ENGINEERING
ENERGY AND
TRANSPORT
LOW VOLTAGE SWITCHES AND
CIRCUIT BREAKERS
SMALL ELECTRICAL
MACHINES
ELEVATORS AND SERVICING
TOOLS
CATERING EQUIPMENT
HOUSEHOLD APPLIANCES
INDUSTRY AND TRADE
INFRASTRUCTURE AND
SERVICES
ELECTRICAL ENGINEERING
INSTITUTE
DEVELOPMENT AND
SERVICES
SWITZERLAND
THE CZECH REPUBLIC
BULGARIA
COMPANIES ABROAD
RUSSIAN FEDERATION
BOSNIA AND HERZEGOVINA
SERBIA AND MONTENEGRO
REPRESENTATIVE
OFFICES
POWER TRANSFORMERS
ASSOCIATED
COMPANIES
KONČAR Electrical Industries Inc.

4. Organisation
R&D PROJECTS
MANAGING BOARD
CONDITION
MONITORING SYSTEMS
ELECTROMOTOR TRAIN
GENERATING SET WITH
FUEL CELLS
SCIENTIFIC COUNCIL
DEPARTMENTS SECTIONS
TRANSFORMERS
R&D Section
SWITCHGEAR & CONTROLGEAR
ROTATING MACHINES
POWER ELECTRONICS & CONTROL
Laboratory for Rotating Machines
High Power Laboratory
Laboratory for Electronics & EMD
High Voltage Laboratory
R&D Section
R&D Section
Control, Communications & Informatics Sect.
Power Electronics Section
EMC Laboratory
Calibration Laboratory
Laboratory for Safety
EMC, SAFETY & CALIBRATION
MATERIALS & TECHNOLOGIES
SERVICES
QM and QA Systems, LAN and INDOC
Certification and Relations with Government Institutions
Legal, Personnel and General Administrative Services
Laboratory for Physical & Chemical Tests
Materials Laboratory
Purchasing & Sale
Accounting & Finance

5. Certified Quality Management and Environmental
Management systems

6. Mission
R&D of equipment and technologies for efficient and
reliable energy conversion and power transmission,
with minimum environmental influence.
Vision
Together with other KONČAR companies, to become the
leading regional company:
• in the development of specific products and equipment,
applying up-to-date technologies, and
• in testing, diagnostics and analysis of electrical
equipment and systems for electric power sector and
transport.

7. Business activities
ISPITIVANJA SUKLADNOSTI 11%
NADZOR 6%
10%
USLUGE RAZVOJA I STUDIJE 15%
I
58%
SALES TOTAL (million EUR) 7.04 10.35
DEVELOPMENT & STUDIES 18%
DIAGNOSTICS 14%
CONFORMITY TESTS 15%
SUPERVISION 8%
2005 2006
APPLIED RESEARCH & DEVELOPMENT 45%
OF INSTITUTE’S OWN PRODUCTS

8. Market segments in 2006
Industry
11%
Trade
3%
Power sector
31%
Transport
55%

9. Sales
0
2
4
6
8
10
12
1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006
mill.
€
Total
Others in
Croatia
KONČAR
Group
Export
Ministries

10. Market in 2006
- Slovenia 1.3 %
- Bosnia & Herzegovina 0.9%
- Germany 0.8%
- Italy 0.3%
- Other countries 0.7%
- Production 6.5%
- Transmission 4%
- Distribution 2.5%

11. Number and structure of employees in 2006
- 142 employees
- 10 scholarship students
- 25 post-graduate students
- 4 approved master’s theses
- 1 approved doctor’s thesis

12. Investments in the equipment and renovation of buildings
0
200
400
600
800
1000
1200
2001 2002 2003 2005 2005 2006
000
€
Equipment
Buildings
Total

13. Operational revenue, added value and human capital
per employee
0
10
20
30
40
50
60
70
80
2001 2002 2003 2005 2005 2006
000
€
Rev enue
Added
v alue
Human
capital

14. RESEARCH & DEVELOPMENT OF
INSTITUTE’S OWN PRODUCTS
2002 - 2006
Annual investments 10% of total sales

15. Multi-system converters for passenger coaches

16. Low-floor tram car: power converters and control units

17. Electronic equipment for commuter train
(under construction)
 Main drive converter
 Auxiliary power supply converter with battery charger
 Central control & communication system
 Intelligent controller

18. Transformer monitoring system

19. Machine monitoring system
MEASURED QUANTITIES:
• Vibrations
• Relative shifts
• Air gap
• Magnetic flux
• Partial discharge
• Process variables
• ...

20. HV switchgear monitoring system
Disconnector
VT
CT
Circuit breaker
Server
CRio
Internet
Disconnector
VT
VT
Circuit breaker

21. Electromagnetic field monitoring system

22. Wind turbine (under construction)

23. Gas electric generating unit with fuel cells and
cogeneration (under construction)
Heat
FUEL
CELLS
REFORMER
CONTROL
DC / AC
CONVERTER
GAS
HEAT
EXCHANGER
HYDROGEN
CO2
DC
W
A
T
E
R
Heat
El.
energy
Heat
DISTRICT HEATING
SYSTEM
ELECTRICAL
NETWORK

24. DIAGNOSTICS OF POWER EQUIPMENT AND
ON-SITE TESTS AND MEASUREMENTS
5 mobile test stations

25. Transformer diagnostics
TRANSFORMER OIL ANALYSIS:
• Physical and chemical oil analyses
• Dissolved gas analysis (DGA)
• Water content in transformer oil
MEASUREMENTS - WINDINGS AND
CORE:
• No-load current (Io)
• Winding resistance in all tap
positions (UI method)
• Transformer voltage ratio
• Winding leakage inductance
• Frequency response analysis (FRA)
MEASUREMENTS – TRANSFORMER BUSHINGS AND INSULATION:
• Capacitance and tan δ of transformer insulation
• Resistance of transformer insulation, U-I method
• Moisture content in transformer insulation (RVM)

26. Diagnostics of HV circuit breakers
TESTS OF:
 Gas quality
 Quality of solid insulation
 Resistance of main circuits
 Operating times
 Control times
 Contact movements
 Contact wear

27. Diagnostics of rotating machines
 AT REST:
- Load resistance, capacity, impedance, dielectric resistance,
discharge currents, loss angle, partial discharges
- Condition of bar, coil and winding insulation
- Stator core
- Condition of synchronous machine amortisseur and induction
squirrel cage
- Non-destructive tests of construction parts
 IN ROTATION:
- Vibrations, runout and rotational
speed
- Stray magnetic fields
- Shaft voltage or bearing currents
- Noise level
- Temperatures on key points
- Process variables

28. Power quality
 MEASUREMENTS AND ANALYSES OF:
- Power flows of fundamental and higher harmonics in
accordance with EN 61000-x-y
- Quality of electric power in accordance with EN 50160

29. Energy efficiency (start-up)
 MEASUREMENTS OF:
- Consumption of electric
and thermal power
- Grid and consumer loads
and losses
 CONCEPTUAL DESIGNS
AND IMPROVEMENTS:
- As-built analyses
- Proposals for improvements

30. LABORATORIES OF THE INSTITUTE
organised in accordance with IEC/EN 17025

31. High-Voltage Laboratory
ROUTINE AND TYPE TESTS:
 Dry and wet tests with power frequency voltage up to
1000kV
 Lightening impulse voltage tests (1.2/50μs)
up to 2000kV
 Switching impulse voltage tests (250/2500μs) up to
1500kV (dry and wet tests)
 Fast transient tests
 Up to 72.5 kV in artificial pollution
 Temperature rise tests of transformers and
HV apparatus and determination of thermal
stability
 Partial discharge
 Capacity and loss angle
 Calibration of HV measurement systems for
impulse and alternative voltage.

32. High-Power Laboratory
 Short-circuit strength of switching
devices, switchgear, instrument and
power transformers, and connection
accessories
 Make and break capacities and
electrical endurance of LV switching
devices and installation accessories
 Temperature rise and voltage drops
on HV and LV switching devices,
switchgear and other apparatus

33. Laboratory for Rotating Machines
 TESTS IN ACCORDANCE WITH
STANDARDS:
- Insulating materials, conductors and
cables
- Electrical and magnetic materials
- Resistance to vibrations of
equipment up to 100 kg
- No-load, short-circuit and load
characteristics of LV and HV machines up
to 400kW, 500A and 50/60Hz
- Torque characteristics of machines and
operating mechanisms with torques up to
5kN and speeds up to 3000 1/min.
- Temperature-rise and ventilation
measurements
- Noise measurements

34. Electronics and EMD Laboratory (1/2)
 MAKING models and prototypes of electric
devices for:
- Electric vehicles and
- Power electronic
 ROUTINE AND TYPE TESTS of electronic
devices and software
 Servicing and maintenances of electronic
systems and devices
 Tests of electric motor drives in
accordance with applicable standards:
- powers up to 400 kW
- alternating voltages up to 10000 V
- direct voltages up to 4000 V
- frequencies from 0 up to 600 Hz

35. Electronics and EMD Laboratory (2/2)
TESTING:
 Equipment in climatic
chambers
 Ventilation and thermal characteristics of machines
 Temperatures, pressures, flows and flow velocities of
fluids
 Characteristics of fans, pumps and heat exchangers
 Protection against ingress of
foreign bodies (IP 1x to IP 6x)
and water (IP x1 to IP x8)

36. Laboratory for Electromagnetic Comaptibility
MEASUREMENTS
AND ANALYSES OF:
 electric devices and equipment
 electromagnetic compatibility
 non-ionising electromagnetic fields

37. Laboratory for Safety
SAFETY TESTS OF:
 Gas and electrical household appliances
 IT and office equipment
 Electric machines, devices and
equipment
 Installations in areas with and without
explosive mixtures
 Working environment in and outside
premises
 Assessment of hazards
ASSESSMENT OF CONFORMITY
UNDER:
 Low Voltage Directive 73/23/EEC
 EMC Directive 89/226/EEC
 Machine Directive 98/37/EC
 Gas Directive 90/396/EEC

38. Calibration Laboratory
 Calibration of instruments and standards of
direct and alternating voltages and
currents, resistances, frequencies and
times
 Certification of multi-purpose meters
(for testing electrical installations,
dielectric and earthing strength etc.)
 Testing and calibration of electronic
measurement equipment

39. Laboratory for Physical and Chemical Tests
 Tests of properties and analysis of materials for installation in
electric machines and devices
 Diagnostic and dielectric tests of transformer oil and paper
insulation
 Environmental studies

40. Laboratory for Materials and Technologies
 Destructive and non-destructive
material tests
 Metalographic and fractographic
inspections of materials
 Thermal treatment of metals in
various protective atmospheres and
vacuum
 Corrosion protection
 Helium liquefaction
 Qualification tests for welders and
solders, and qualification of procedures
 Calibration of vacuum probes and tests
of air tightness

41. Recognitions 2006 – ZLATNA KUNA Award, Transformer
Monitoring System, Low-Floor Tram