Excitation and response
An instrumented hammer and sensors record the response of selected accessible points.
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MEXICO · PLANNED SPECIALIST SERVICES
Generator stator end-winding bump testing
Obtain evidence of end-winding mechanical response to support maintenance planning. TEMISA Power Gen® coordinates test scope, access and specialist scheduling.
Request early. Scope and dates confirmed after technical review.
What does this inspection assess?
A bump test uses instrumented impact to identify natural frequencies of stator end windings. It helps assess proximity to relevant excitation frequencies and determine whether further evaluation is needed.
Natural frequencies
Frequency response functions help characterize the behaviour of the structure under assessment.
Technical interpretation
Results are reviewed against configuration, supports, test conditions and applicable references.
PLANNED INSPECTIONS
Contact us before you finalize the outage
This is a planned specialist service. Contact TEMISA as early as possible so we can review the machine, define scope and coordinate equipment, personnel and logistics. An enquiry does not reserve a date.
- 01
Request early
Share manufacturer, model, rating, site, inspection objective and proposed outage dates before finalizing the plant schedule.
- 02
Review feasibility
We review drawings, photographs, history and access. We identify missing information and the specialists and equipment required.
- 03
Agree scope and dates
The proposal defines tests, deliverables, exclusions, responsibilities and schedule. Mobilization requires confirmed availability and commercial conditions.
- 04
Prepare and execute
The site provides agreed access and equipment release. The team verifies readiness, coordinates other work and records the actual test coverage.
- 05
Report and plan next steps
Findings, limitations and recommendations are delivered on the agreed timetable. Further tests or repairs are scoped separately.
What determines lead time?
Machine geometry, completeness of technical information, specialist and equipment availability, site preparation, location and travel or customs requirements. The proposal separates preparation, testing, reassembly and reporting; test duration is not total outage duration.
Information to start the review
- Manufacturer, model, rating and nominal generator frequency.
- Drawings or photographs of end windings and their supports.
- Vibration history, repairs, support changes and previous test results.
- Outage window and access for sensor installation and instrumented impacts.
Expected deliverables
- Documented measurement points, directions and test conditions.
- Frequency response results and identified frequencies within the agreed scope.
- Report of findings, limitations and recommendations for further evaluation.
Full modal analysis is specified where appropriate. This test does not replace operating vibration monitoring and does not include repair or rebracing.
Coordination in Mexico; Latin America assessed by project
For sites outside Mexico, TEMISA reviews location, access, specialist availability, travel and customs requirements before confirming a programme. Scope, dates and report delivery are agreed in the proposal.
Before scheduling
Is bump testing performed while the generator is running?
The service described is planned with the equipment offline, accessible and released for testing. Measurements during operation are a separate scope.
Does the result automatically approve the generator for operation?
No. Results must be interpreted with machine history, test conditions and applicable criteria. An individual frequency alone cannot establish the overall condition of the machine.
How far in advance should I request the service?
Contact us during outage planning, before finalizing the schedule. Lead time is confirmed after reviewing technical information, scope, access, specialists, equipment and logistics. There is no single lead time for every machine.
Does an enquiry reserve an inspection date?
No. An enquiry starts the assessment. Mobilization is scheduled once scope, commercial conditions, availability and required site preparation are confirmed.
Can several tests be coordinated during one outage?
Yes, subject to feasibility and availability. We define the sequence and work interfaces; combining services does not mean they can all run simultaneously.
COORDINATED OUTAGE SERVICES
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A test programme defined for the machine and the diagnostic objective.
Review scope →Start with your machine and your outage window
Share the available information. We will identify the next technical review step.
Request technical assessment →