EGU – HV Laboratory a.s.

call-answer +420 267 193361 Visit website

Podnikatelska 267
Praha 9 - Bechovice, 190 11
Czech Republic

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Fully independent and internationally recognized High Voltage Testing Laboratory with 65 years of continuous experience in the testing and research.
The High Voltage Testing Laboratory has been accredited acc. to ISO / IEC 17025 for more than 25 years.

It has been accredited acc. to ISO / IEC 17025 for the High Voltage Testing for more than 20 years.

Key Contact Personnel:
Jan Lachman, Managing Director
Marek Brosch, Testing Lab Manager
Pavel Jányš, Quality Manager
Lubomír Kočiš, Head of R&D Department

Major Markets Served: Europe, USA, Asia, Middle East, Africa, Australia

Other Website:

EGU – HV Laboratory is approved for the testing from following companies: DEWA, TRANSCO, SEC, TNB Malaysia, NTDC Pakistan


High Voltage Laboratory

Number of Employees in High Voltage Laboratory: 15
Dimension of Main Test Hall: 54 m length x 25 m width x 24 m height
Dimension of Secondary Test Hall: 30 m length x 12 m width x 11 m height
Dimensions of a Third Test Hall (NEW): 35 m lenght x 18 m width x 10 m height

Dielectric Testing Facilities:

Max. Voltage / Current Standard/Remarks
Impulse Testing:
Lightning Impulse 2600 kV IEC / IEEE
Switching Impulse 1600 kV IEC / IEEE
A.C. Testing: up to 1200 kV IEC / IEEE
D.C. Testing: up to 300 kV IEC / IEEE
Partial Discharge & RIV Testing: 800 kV IEC / IEEE
Capacitance & Tan ∂ Testing: 800 kV IEC / IEEE
Pollution Testing salt fog / solid layer / special tests IEC 60507
Temperature Rise Testing
on Bushings
8 000 Amp IEC 60137 / IEEE Std C57.19.00

• Three test chambers for the tracking and erosion salt fog testing as per IEC 62217.
• One test chamber (475 m3) for the pollution testing as per IEC 60507.
• Tracking wheel test as per IEC / ANSI

Other Test Capabilities

RIV & Corona Measurement: 800 kV -IEC 60437, CISPR 18-2, IEC 61284
Temperature Rise Tests: Bushings up to 550 kV / all types / IEC + IEEE
Pollution tests: Salt fog testing, solid-layer testing (clean fog, flow-on method, rapid clean fog etc.)
Mechanical Tests: Horizontal testing machine – tension / max. load 600 kN / max. length 5 m
Vertical testing machine – cantilever / max. load 30 kN
Thermal Mechanical Tests:  Two thermal – mechanical chambers; up to 300 kN tensile, up to 50 kN bending / -60°C to +100°C.
Insulator Sets: Dielectric type testing of insulator sets – RIV / AC / LI / SI
Setups according to IEC 60383-2 and customer requirements.
High Voltage Bushings: Type testing of insulator bushings acc. to IEC and IEEE standards.
Electrical testing, cantilever testing, tightness testing, temperature rise testing, thermal stability testing
Insulators: Full design and type testing of glass, porcelain and composite insulators as per IEC and ANSI standard. Hollow Core Insulators: Design and Type testing – interface test, internal pressure test, leakage test
Environmental and On Site Tests: Measurement of pollution degree and state of external insulation, measurements of radio interferences, electric and magnetic fields, audible noise and overvoltages, simulation in ATP/EMTP
Other tests: Performed on hollow core insulators: design and type testing – interface test, internal pressure test, leakage test, surge arresters, bushings, disconnectos, switchgears
R&D Activities: Overhead line design, insulation coordination studies, ferroresonances, HV cable performance studies, Transient-overvoltage studies and measurements, international research activities, standardization.
Activities in IEC and CIGRE: Company experts are active in IEC TC 36, CIGRE SC D1, C4 and B2.
MV & HV power cables testing to be introduced within 2019.