The brief was reasonably open, but the aim was clear-operators wanted to avoid the downtime and cost that was associated with the traditional method of disassembly and visual inspection. To answer these challenges, two years ago the SDO Industrial Generator Service Unit and the SPG Non-Destructive Test department at Siemens began collaborating on a project to provide a more efficient inspection method for smaller generators. One of these aspects is the gap between the stator and the retaining ring, which can be as little as 20 millimeters (mm). Performing the work with a robot can save time and money, but there are limiting factors that can make accessing the generator with a robot troublesome. One of the most challenging elements of any inspection is to examine the internal workings, such as the stator and rotor. Performing thorough generator inspections at regular intervals is vital to the continued safe and efficient operation of a power plant, so it is a regime that cannot be neglected. An impressive new visual inspection robot can save owners many days of unnecessary downtime and hundreds of hours of work. Inspecting generators has always been a time-consuming and expensive job, yet one that needs to be done at regular intervals.
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