Equipment · Hydroelectric
Hydroelectric Generator Repair & Rewinding
Independent multi-OEM workshop for salient-pole hydrogenerators. IEEE 56 + IEC 60034 + ISO 9001:2015. Specialized in pole-coil rewinding, stator VPI, ELCID core diagnosis.
Workshop capabilities
Specialized hydroelectric generator service
Salient-pole hydrogenerators require know-how that few independent workshops in Mexico hold. We perform field coil rewinding, pole rebuilding, stator VPI rewind, magnetic core repair, brushless excitation diagnosis, and final commissioning.
- Salient-pole rotor rewinding (4 to 80+ poles) including pole rebuilding, field coil reinsulation, dovetail repair
- Stator winding rewind: form-wound and Roebel bars, multi-turn coils, with VPI vacuum-pressure impregnation
- Magnetic core repair: ELCID core test (CIGRE TB 257) + lamination restoration where needed
- Pole voltage drop test, comparing each pole against the average and the asset history, to detect inter-turn shorts on field coils
- Vibration analysis on Kaplan + Francis + Pelton runners under ISO 10816
- Thrust + guide bearing diagnosis (Kingsbury, Michell) under API 670 standard
- Generator commissioning with IEEE 115 acceptance tests + IEC 60034
Coverage
Hydroelectric sectors we serve
CFE hydroelectric plants
From small hydro to large reservoir units, within our 1 to 365 MVA capacity. Field service in remote sites with limited access.
Run-of-river plants
Andritz, Voith, GE Vernova Kaplan + Francis turbines coupled to synchronous generators with brushless excitation.
Pumped-storage hydro
Reversible pump-turbine generators with high-cycle operation requiring frequent diagnostic and reduced-MTBF overhauls.
Mini-hydro IPP / cooperatives
Small private hydroelectric facilities 1-15 MW under IPP contract with CFE. Multi-OEM coverage.
Multi-OEM coverage
Independent service for hydroelectric OEMs
Frequently asked questions
Do you rewind salient-pole field coils on hydrogenerators?
Yes. We rebuild and rewind salient-pole field coils on hydroelectric generators from 4 to 80+ poles, including dovetail repair, insulation system replacement (Class F or Class H), VPI impregnation, and a final pole voltage drop test with the acceptance criterion agreed in writing in the protocol.
Which OEMs do you service on hydroelectric generators?
TEMISA is a non-exclusive authorized service representative for TDPS generators in Mexico (agreement dated 12 January 2026, signed 19 February 2026). Supply, parts and warranty terms are confirmed in writing for each project. TEMISA Power Gen is an independent multi-brand service shop; the manufacturer's name identifies the equipment serviced.
How long does a hydrogenerator major overhaul take?
The schedule depends on the condition of the generator, the agreed repair scope, parts availability and site logistics. Contact us in advance of your planned outage so we can review the requirements and confirm the project schedule with your quotation.
Contact
Need service for your industrial generator or turbogenerator?
Response and quote timing confirmed after reviewing your request. Emergency support by arrangement across Mexico and Central America.
Quote requests
ventas@temisapowergen.mxDirect line
+52 33 3614 2460Shop hours
Monday to Friday 8:30–17:30 and Saturday 8:30–13:30 (closed Sunday)
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ISO 9001:2015 · IEEE / IEC