Generator Services International, Inc

We provide solutions for generators from multiple OEMs. Services are available on-site at your location. Our total package includes complete generator inspection and repair services, ranging from electrical inspection and testing of generator components to complex repairs of the stator and field rotor.

Ofc- 704-399-5422 / Rush - 704 - 496- 3090

Testing & Inspections

Electrical / Mechanical Testing

GSI offers many types of electrical and mechanical tests for turbine-generators, including customized diagnostic testing to help diagnose unique equipment problems.

• Specializing in customer representation during major generator rewinds of conventional cool, gas cooled and liquid cool short cycle rewinds.  
• Technical direction, professional consultation and second opinions
• Project management
• Complete labor services
• DC leakage testing
• Re-wedging of stator
• High-voltage bushing replacement
• Application of "tagging compounds" for core monitoring systems
• Installation of flux probes, and stator slot couplers
• Refurbishment of flex leads and provision of stand-off bushings
• Acoustic testing
• End winding resonance testing
• Flux probe testing

Generator Services International, Inc

We provide a wide variety of electrical and mechanical tests for any turbine-generator, regardless of manufacturer, to help shorten planned outages and eliminate unplanned outages. Our suite of non-destructive testing services can help you assess the condition of your machines economically, regardless of manufacturer.

Non-Destructive Testing

Plant maintenance programs based on periodic disassembly and inspection of critical turbine-generator components, while relatively costly, have proven remarkably effective as evidenced by the industry's consistently favorable plant reliability and availability statistics. New bottom line realities, however, are motivating many plant operators to re-evaluate established maintenance practices and deviate from them where they perceive net cost-to-risk advantages. Our suite of non-destructive testing services can help you assess the condition of your machines economically.

• We offer:
• Generator rotor bore sonic inspections
• Retaining ring inspections
• Generator Rotor Slot Tooth Eddy Current Inspection
• Custom test development

End Winding Resonance Tests

The end winding resonance test ensures the natural resonances of the generator series loops are not in close proximity to the operating frequencies. By testing for resonant frequencies, you can modify the support structure to avoid possible winding failures. We offer end winding resonance tests for all turbine-generators regardless of manufacturer.

We recommend an end winding resonance test when:

• The unit has been rewound or a bar replacement has been conducted
• Visual inspection such as dusting or greasing indicates relative motion
• The unit has undergone epoxy injection or another end winding repair requiring a rebuild of the   series loops
• Acoustic measurements during operation at a frequency of 120 Hz show elevated amplitude at the ends of the machine