Active components for power transformers, manufactured locally to your specifications. Erection, commissioning and maintenance of power transformers from 2.7 MVA – 315 MVA.


CALL: +27 (0)72 768 1613

We service the following industries:

Power Generation & Distribution





Level 2 B-BBEE contributor​

Trecento is 51% Black Female owned and managed.

Staff contribute to NPAT.

Our Foundation

Trecento was founded in July 2014 by Carmen Williams, a financial manager with extensive experience in the South African electrical industry. Carmen’s knowledge of the power generation sector led to a productive partnership with Simon Guidetti, who is a veteran engineer and transformer specialist. 


From efficient power core designs and a strategic view of industry needs, Trecento (Pty) Ltd was born. The company was founded with the support of the Enterprise Development Programme at Actom, the largest electro-mechanical services company in Africa.

Leading Brand

Trecento has become a leader in the supply of active components for power transformers and has successfully completed the erection and cold commissioning of power transformers on various national sites. The industry has awarded our service with the Women in Power prize, presented to Carmen Williams in 2017.

Service Overview


Trecento manufactures transformer cores and tank shunts with the highest quality grain-oriented steel, from 5 – 315 MVA (275 kV) to your specifications.


Trencento installs and assembles transformers which are diagnostic-tested to bring them into service.

Testing & Analysis

Trecento tests and analyses oil samples. We conduct DGA’s, dielectric strength and acidity tests – either on-site or at our laboratory.


Trencento manages logistics over sea and land to move transformer components and rig them into place on site.


Trencento maintains and services units with periodic testing and servicing according to OEM requirements, then report back and provide an emergency response service.


Trecento supplies grain-oriented steel, Buchholz and surge relay units, transformer oil and consumables.

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Trecento is accredited by industry bodies, leading power providers and manufacturers.

Sole Agents of Legnano Teknoelectric Company

Trecento is the sole agent in Sub-Saharan Africa for Legnano Teknoelectric Company (LTC) – world leaders in the processing of electrical steel for transformers. With the support of LTC, Trecento (Pty) Ltd is able to supply the South African electrical industry with fully assembled transformer cores which meet the highest international quality standards.

Trecento Updates

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