
Development, manufacturing and commissioning of test benches, power electronics, media conditioning and testing services for drive and energy systems
Kristl, Seibt & Co. Gesellschaft m.b.H.
Graz (Headquarter, Manufacturing, Software) · St. Veit an der Glan · Bregenz · Kernen · Friedrichshafen · Kressbronn am Bodensee · Munich · Stuttgart · Mannheim · Zollikon · Pune · Livonia/NorthvilleNew on Amplifa
About KS Engineers
KS Engineers (Kristl, Seibt & Co. Gesellschaft m.b.H.) is an Austrian technology company headquartered in Graz that has been developing and manufacturing test technology, automation and energy technology for over 50 years. The portfolio includes engine, powertrain, vehicle, e-axle, battery, fuel cell and electrolysis test benches, battery simulators, highly dynamic power converter systems (KS-AMPS), media conditioning systems for lubricating oil, coolant, air and fuel as well as turnkey PEM electrolysers (KS-H2GEN). Systems are manufactured or pre-fabricated in Graz, with fusion welding of metallic materials (EN ISO 3834-2) and the manufacture of load-bearing steel structural components up to EXC 3 (EN 1090-2) part of the company's own value creation. Own test fields in Graz and Friedrichshafen offer testing services including accredited power measurement at the wheel hub. Customers come from the automotive, heavy duty, aviation, marine, rail, energy, defence and research sectors; assembly, commissioning and service are provided via locations in the DACH region, India and the USA.
- Site
- Graz
- Processes
- Engine testing (ICEs and alternative fuels) - Testing service, Media conditioning (lubricating oil, coolant, air, fuel, special media such as ethanol, AdBlue), Fusion welding of metallic materials (EN ISO 3834-2 certified), Manufacture of load-bearing steel structural components up to EXC 3 (EN 1090-2), Vehicle and powertrain testing (R2R, ADAS testing, hot braking), Battery and fuel cell testing with battery simulators (DC source/sink), Inverter testing (PowerHIL, battery simulation + e-machine emulation), Testing services for drive technology and energy systems (test fields Graz and Friedrichshafen)
- Materials
- metallic materials (fusion welding), steel (load-bearing steel structural components up to EXC 3), Steel, Fusion welding of metallic materials
- Certificates
- EN ISO 9001:2015, EN ISO 14001:2015, EN ISO 45001:2018, EN ISO 3834-2, EN 1090-2 (steel construction up to EXC 3), VDA ISA TISAX AL3 + Prototype Protection, Accredited testing laboratory according to EN ISO/IEC 17025:2017 (ID 0474), ISO 9001, ISO 14001, ISO 45001, EN 1090-2 (up to EXC 3), TISAX AL3 + Prototype Protection, EN ISO/IEC 17025 (ID 0474)
- Industries
- Automotive, Heavy Duty & Offroad, Aviation, Marine, Rail Vehicles, Energy
- 01
Engineering and design
- 02
Steel construction/welding manufacturing in Graz
- 03
Electrical and software development (Tornado Automation)
- 04
Prefabrication and plant construction at the Graz site
- 05
On-site assembly and commissioning at the customer
- 06
Service, maintenance and testing services
Materials & Processes
Steel
Manufacture of load-bearing steel structural components up to EXC 3 in accordance with EN 1090-2.
Fusion welding of metallic materials
Certified welding of metallic materials for plant and test bench construction.
Locations

Graz (Baiernstraße 122a)
ATHeadquarter

Graz (Harter Straße 4)
ATManufacturing and Engineering
- Materials
- Steel, metallic materials (welding)
- Engine test benches up to 4.900 kW
- R2R complete vehicle test benches
- 8 B2B e-axle test benches
- Fuel cell and electrolysis stack test systems

Graz (Peter-Rosegger-Straße 24)
ATManufacturing and Engineering
- Materials
- Steel, metallic materials (welding)

Graz (Asperngasse 4)
ATSoftware Development and Engineering
- Tornado Automation System

Friedrichshafen
DETesting Center (Testing Services)
- Engine test benches up to 4.900 kW
- Powertrain test benches
- R2R CV e-drive test bench
Kernen
DEGerman Headquarters
Zollikon
CHSwiss Headquarters
Pune
INEngineering / Service & Support (Kristl Seibt India Private Limited)
Livonia / Northville
USEngineering / Service & Support
Products & Systems






Inside the production



Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Engine testing (ICEs and alternative fuels) - Testing serviceTesting | – | – | – | – | internal combustion engines, alternative fuels |
| Testing | – | – | – | – | – |
| Media conditioning (lubricating oil, coolant, air, fuel, special media such as ethanol, AdBlue)Engineering | – | – | – | – | lubricating oil, coolant, air, fuel, ethanol, AdBlue |
| Testing | – | – | – | – | electrolysis stacks, DI water |
| Fusion welding of metallic materials (EN ISO 3834-2 certified)Joining | – | – | – | – | metallic materials |
| Manufacture of load-bearing steel structural components up to EXC 3 (EN 1090-2)Engineering | – | – | – | – | steel |
| Vehicle and powertrain testing (R2R, ADAS testing, hot braking)Testing | – | – | – | – | – |
| Battery and fuel cell testing with battery simulators (DC source/sink)Testing | – | – | – | – | batteries (traction battery packs), fuel cells, inverters |
| Inverter testing (PowerHIL, battery simulation + e-machine emulation)Testing | – | – | – | – | inverters |
| Testing services for drive technology and energy systems (test fields Graz and Friedrichshafen)Testing | – | – | – | – | – |
| Software development and automation (Tornado Software Suite)Engineering | – | – | – | – | – |
| Simulation & Modelling / Digital Twin & SimulationEngineering | – | – | – | – | – |
| PEM hydrogen production (turnkey PEM electrolysers, KS-H2GEN, power levels of 5 MW)Engineering | – | – | – | – | PEM electrolysers |
21 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Classic engine test benches with 4-quadrant asynchronous machines | KS Engineers KS FU | – | 29.000 Nm S1, pallet system for engines up to 4900 kW, conditioned test cell (80000 m³/h) | – | Graz / Friedrichshafen |
| R2R complete vehicle integration test bench | KS Engineers KS-R2R | – | Testing of ADAS functions, IPG Carmaker compatible, KS test wheel | – | Graz |
| R2R CV e-drive test bench, 2-machine | KS Engineers KS R2R FU | – | – | – | Graz / Friedrichshafen |
| Powertrain test benches, 2-machine | KS Engineers | – | – | – | Graz / Friedrichshafen |
| Back-2-Back e-axle test benches (B2B) | KS Engineers | 8 | Battery simulation 120 kW / 200 A / 40-800 V, climatic chamber -40 to 120°C, 0 to 98 % humidity | – | Graz |
| R2R powertrain test bench, 2-machine with ICE | KS Engineers | – | 2x asynchronous machines, each 375/440 kW, 3.200/3.500 Nm (overload 6.700 Nm), max. 3.000 1/min | – | Graz |
| R2R powertrain test bench 4/5M (all-wheel drive) | KS Engineers | – | – | – | Graz |
| R2R powertrain test bench, 3-machine | KS Engineers | – | – | – | Graz |
| Electric motor test benches | KS Engineers KS R2R frequency converter | – | – | – | Graz |
| Fuel cell test bench | KS Engineers | – | Dynamic control of pressure, temperature and humidity | – | Graz |
| Fuel cell stack test benches (short stack) | KS Engineers | – | – | – | Graz |
| Electrolysis stack test systems | KS Engineers | – | up to approx. 50 barg cathode / 30 barg anode circuit, up to 2.000 kW electrical stack power | – | Graz |
| KS-Fitbox (complete vehicle test bench in container format) | KS Engineers KS-FITBOX | – | – | – | Graz |
| Complete vehicle test bench with test wheel (axial flux motors) | KS Engineers KS-F4R (FIT4ROAD) | – | per wheel: nominal 400 Nm / 70 kW, peak 900 Nm / 100 kW, max. 2.500 rpm | – | Graz |
| Battery simulator (DC source/sink) | KS Engineers KS-BATTSIM 4 / 5 / 5-RC (SiC) | – | e.g. KS-Battsim 5RC: P = 500 kW, I = 1000 A, U = 16-1500 V, fs = 160-240 kHz | – | Graz |
| Modular power converter system (powercubes HB17/HB12/RC12) | KS Engineers KS-AMPS | – | HB17: 600 kW (1700 V), HB12: 1070 kW (1200 V), RC12: 265 kW (40 kHz), system clock 2 MHz | – | Graz |
| System test benches | KS Engineers | – | Measurement data acquisition up to 10 kHz | – | Graz |
| Lubricating oil conditioning systems | KS Engineers | – | 20°C to 150°C, 1-16 bar, 0-500 l/h | – | Graz |
| Coolant conditioning systems | KS Engineers | – | -40 to 150 °C, 1-10 bar, 0-2000 l/h | – | Graz |
| Air conditioning systems | KS Engineers | – | 15-50 °C, 250-1100 mbar abs., volume flow up to 10.000 m³/h; turbocharged up to 4 bar, 500 kg/h | – | Graz |
| Fuel conditioning and consumption measurement systems (e.g. Horiba, 15-60 °C) | Horiba / KS Engineers | – | 20-70 °C, 1-10 bar, 0-200 kg/h | – | Graz / Friedrichshafen |
Additional services
Quality & Certifications
Certified to ISO 9001, ISO 14001, ISO 45001, ISO 3834-2 and EN 1090-2 (steel construction up to EXC 3) as well as TISAX AL3 with prototype protection. The company's own test laboratory is accredited to EN ISO/IEC 17025:2017 (ID 0474) for power measurement at the wheel hub.
| Evidence | Graz | Friedrichshafen |
|---|---|---|
| ISO 9001 | ||
| ISO 14001 | ||
| ISO 45001 | ||
| EN ISO 3834-2 | ||
| EN 1090-2 (up to EXC 3) | ||
| TISAX AL3 + Prototype Protection | ||
| EN ISO/IEC 17025 (ID 0474) |
History
Over 50 years of experience in test technology, automation technology and building services (no exact founding year published)