About Us

Cerisol Company

About us

CERISOL is a technical expert manufacturer of state-of-the-art porcelain insulators for substations, disconnectors, bushing and transformers (hollow insulators) and insulators for railway applications. These were further developed in-house, allowing production of high-quality products with efficient designs, tightest tolerances and shorter lead times for applications up to 800 kV AC and up to 500kV DC.

Thanks to decades of excellence in research, engineering, production and service, in addition to the millions of insulators in service guaranteeing impeccable performance across the globe, Cerisol has gained a reputation for unrivaled technical expertise and innovation.

experience and development

+70 years

increasing capacity every year

+6.000 ton. per year

fully committed and dedicated

+180 employees

Trust in our products

+50 countries



Brief History

Focus on the future capitalizing the experience from the past.

Cerisol is focused on the future without forgetting the past, all the history and the experience gather for more than 100 years.

The company was founded in 1912 with the aim of producing a very diversified mix of electrical appliance of low voltage products for home usage. Progressively the company increased its portfolio of products to become a supplier of products for the industry such as cap and pin porcelain insulators for the Portuguese grid.


In 1967 the first IEC outdoor post insulator was manufactured for a voltage level of 66kV. With the increase of opportunities in the 70’s and 80’s in Portugal and abroad associated with a strong development of the product portfolio namely outdoor post insulators, hollow insulators and insulators for railway applications, a spin-off company from the Electro-Cerâmica group in 1989 was officially created as Cerisol.

In 2004 a new stage began to Cerisol when it was acquired by a new group of shareholders. In the following decade (2011) Cerisol moved to a new plant in Serzedo, V.N. de Gaia, boosting the manufacturing capacity, mainly focus on porcelain post insulator up to 800kV.


Sustainable development and ensuring Health and Safety in the Workplace

Our Company Mission, Vision and Values


Cerisol intends to be a key partner in the relationship with its customers and stakeholders, through the development of solutions adapted to the expectations, privileging the quality, the minimization of environmental impacts and the safety of all the elements involved.


Cerisol intends to be a reference in the domestic and international markets where it operates, promoting the conditions of operation and outstanding levels of reliability of the high voltage networks in which the insulators it manufactures are integrated.


Commitment – listen to all stakeholders, their expectations, providing a service aimed at their satisfaction, as well as for compliance with all legal, regulatory, and other requirements applicable to the activity. Our success is based on the quality and performance of our products, services, and people.

Quality – establish strategic objectives that enable the company to continuously improve the quality of its products and services.

Efficiency – Cerisol is committed to operational excellence using its resources in the most efficient manner, thriving for continuous improvements while celebrating the achievements of our employees.

Worldwide Locations

Where to find us