DEKRA Industrial Inspection

Using the latests robotics technologies to increase efficiency, prodcutivity and reliability

DEKRA Industrial Inspection

Using the latests robotics technologies to increase efficiency, prodcutivity and reliability

DEKRA Industrial Inspection

Using the latests robotics technologies to increase efficiency, prodcutivity and reliability

DEKRA Industrial Inspection

Using the latests robotics technologies to increase efficiency, prodcutivity and reliability

HomepageServicesIndustrial InspectionElectrical rotating machine

Electrical motor and generator inspection

Testing with rotor-in-situ technology

Turbo and Hydro generators as well as large motors are crucial components in an industrial power plant and are designed to operate reliably for many years. One of the most expensive parts of a 3-phase generator is the stator, which is where the energy from the magnetic field is converted into electrical energy/ mechanical energy. The condition of the stator core of a rotating electrical machine deteriorates over time, increasing the likelihood of failures. Quantitative testing and periodic inspections of the generator core are necessary to avoid outages.

The common trend is to inspect the generator during a minor outage with the rotor in-situ. This has a big advantage as it is less labor intensive and is associated with lower cost compared to removing the rotor. Aside from saving time and money during an outage by inspecting with the rotor in place, the results allow for planning of a major outage (e.g. ordering components with a long lead time). Reduced disassembly requirements during the overhaul means less people on site, higher availability of crane and more lay-down space. Possible consequential damage due to rotor dismantling is avoided.

Electrical motor and generator inspection services

Advanced Robotic Generator Inspection System (ARGIS)

Air gap inspections with the rotor in place have become commonplace to assess the condition of the generator. With our ARGIS robot (only 15 mm thick), we can inspect a broad range of generators.

Details

Bump Testing

When natural frequencies of the end windings are close to twice the frequency of the power grid, resonance will lead to rapid wear of the windings. Bump testing will reveal the end windings’ natural frequencies.

Details

Retaining Ring Inspection (KIRR)

With the KIRR manipulator, suited for almost all generators, retaining rings can be tested with the rotor in place in just a few shifts.

Details

Regular testing increases reliable operation and prevents potentially costly downtime and repairs. Our experts can provide you with information and recommendations regarding:

Condition of the Turbo generator/ Hydro Generator / Large motor
Routine maintenance/overhaul
Long-term condition

If you have any other requirements, like eddy currents testing of Turbo generator coolers, UT/PAUT on rotor wedges (for built-out rotors), NDT on fan blades, bearings or other, please get in touch.

Measurements, inspections and testing

Online guidance session

Would you like to know how we can help you with our electrical motor and generator inspection services? Please get in touch! During a free online session you can ask specific questions to our expert and we will guide you through the process. Complete the form below. We will call you back at a time of your convenience.