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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesTechnical Consulting & EngineeringUsterTrafoexperts GmbH
Trafoexperts GmbH Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of Trafoexperts GmbH is the provision of consulting services for transformers, including: specification review, factory audits, bid evaluation, design analysis, factory acceptance tests, seminars, DGA diagnostics and other diagnostic procedures, on-site testing, fault analysis, litigation, wind and PV generation, and GIC verification. The company thus offers a comprehensive range of services for the transformer industry, from consulting on specifications and design to fault analysis and litigation.

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Products & services

Industry:Technical Consulting & Engineering
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Trafoexperts GmbH

✓ Offered12
Transformer consulting services
Transformer consulting services for manufacturers and users: specification review, factory audits, bid evaluation, design analysis, factory acceptance tests, diagnostics, on-site testing, failure analysis, litigation support, seminars, wind and PV, GIC verifications.
Transformer Specification Review
Review of technical transformer specifications to reduce unnecessary constraints, improve reliability, and achieve a cost-effective transformer without compromising performance.
Transformer Factory Audits
Audits of transformer OEM capabilities in design, manufacturing, and testing for power and special transformers on behalf of customers.
Transformer Bid Evaluation
Technical review of transformer bids, interviews with bidder engineering teams, follow-up review, and recommendations to align and compare offers meaningfully.
Transformer Design Analysis
Advanced design analyses for transformers and reactors, including insulation, losses, hot spots, stray losses, temperature, impedances, and electromagnetic forces.
Transformer Factory Acceptance Tests
Supervision of transformer acceptance tests, checking test setup and measurements, interpreting results, and spotting problems before delivery.
Transformer Seminars
Custom seminars on transformer design, standards, maintenance, insulation design, DGA interpretation, PD measurement, and FRA interpretation, delivered at the customer site.
Transformer DGA & Other Diagnostics
Interpretation of DGA, FRA, dielectric spectroscopy, and PDC results, including custom limits, fleet health assessment, and follow-up actions for transformer issues.
Transformer On-Site Testing
Supervision of on-site transformer tests, interpretation of results, decision on additional tests, and organization of new tests based on site equipment.
Transformer Failure Analysis
Technical failure investigations to determine root causes, collect evidence, and prevent repeat failures so transformers can return to service safely.
Support for Litigations Involving Transformers
Independent technical advice for transformer disputes, support to legal teams, and technical arguments understandable outside the engineering profession.
Transformers for Wind and PV Generation
Assessment of manufacturer capability, training for reliable wind and PV transformers, fleet diagnostics, forensic failure analysis, and litigation support.
Trust & reputation

ranQ Trust Score of Trafoexperts GmbH: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 54% · As of October 2026

Without public customer reviews the score stays capped.

Trafoexperts GmbH has no value in the Reputation area of the ranQ Trust Score because no data is available. The area carries 42% of the weighting and drops out of the calculation for this profile; it does not lower the score, only the reported data basis.
x
CriterionValueWeight
  • Review quality: No data point — the criterion is taken out of the weighting and does not lower the score.—24%
  • Review volume: No data point — the criterion is taken out of the weighting and does not lower the score.—10%
  • Review recency: No data point — the criterion is taken out of the weighting and does not lower the score.—8%
Trafoexperts GmbH scores 83.0 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
x
CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.100.012%
  • Company size: The headcount band, researched by ranQ or stated by the company. It is scored in steps rather than by head count, because the data only provides bands.55.07%
Trafoexperts GmbH scores 85.0 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
x
CriterionValueWeight
  • Verification: Official register entry (commercial register with UID or professional-body record, 55 points), confirmed domain (20 points) and confirmed ranQ profile (up to 25 points, depending on completeness).85.022%
Trafoexperts GmbH scores 2.3 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
x
CriterionValueWeight
  • Website authority: Ahrefs' Domain Rating measures, on a scale of 0 to 100, how strongly a website is linked from other websites. For Swiss SMEs the range up to 40 is typical; the maximum is reached at 35.2.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Trafoexperts GmbH reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». No public customer reviews are available for this provider; the rating is based on the remaining criteria. The data basis is 54%, so the score is backed by part of the criteria. As of October 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

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Location

Turbinenweg 4
8610 Uster

At a glance

Legal form
Limited Liability Company
UID
CHE-479.293.749
Founded
2011 · 15 years
Last commercial register change
February 18, 2020
Employees
1 to 10
Legal form: Graded by liability and disclosure. The weight is kept small: a sole proprietorship is not a dubious company, it is just liable differently.
88.0
6%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
    • Full methodology

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