Blog

Motor Rewinds

Sidewinders is excited to announce that our brand-new SAMATIC 2780-EXT is installed, plugged in, and busy rewinding a variety of AC and DC motors! The SAMATIC automatic coil winder can wind any motor, armature, or generator that incorporates mush (or random) winding—both stators and rotors.

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EASA Accreditation

Good for Us and Good for Our Customers Sidewinders is proud of our recent accreditation by EASA (the Electrical Apparatus Service Association). According to Linda Raynes, the President and CEO of EASA, “The intent of this groundbreaking accreditation program is to evaluate service centers for evidence of compliance to assure that they are using prescribed […]

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GENERATOR ROTOR TESTING

Before we talk about generator rotor testing, let’s make sure we are all on the same page in terms of understanding what a rotor does.  First, let’s start with a quick discussion of terminology.  Some OEMs such as GE refer to the rotating portion of the generator as the field.  Others, such as Siemens refer […]

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FREQUENCY-RESPONSE ANALYSIS (AKA: BUMP TESTING)

Just as every bell has a unique tone when struck by a hammer, so do all generator winding components.  Every structure, in fact has its own characteristic modes of mechanical response when deformed after being struck.  While not very musical in nature, the response waveform gives the trained Technician valuable information on the integrity of […]

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Insulation Resistance and Polarization Index Testing of Generators

Megger & P.I. as it’s commonly referred to, is one of the quickest, safest, and simplest tests in the arena of generator electrical testing, but it is also one of the most useful.  It is this simplicity that often makes the test somehow seem less important than some of the “big ticket” tests such as […]

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