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Suspension Insulators | Products | NGK INSULATORS, LTD.

Jun. 09, 2025
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Suspension Insulators | Products | NGK INSULATORS, LTD.

Overview

Features

Available for any voltage and contamination level by changing number of insulators

You will get efficient and thoughtful service from Yipeng.

Product Lineup

Various Types of Suspension (Disc) Insulators.

Application

High Reliability

High reliability is achieved by long-term experience and accumulation of technology.

Selected High Quality Raw Material

High strength porcelain insulators require not only higher amount of alumina but also

Optimum Design Engineering

  • *M&E Test: Electromechanical failing load test as per IEC -1

Advanced Manufacturing Technology

Strict Quality Control

In addition to ISO certified,

Hydraulic Pressure Test

Excellent Long-Term Performance

Long-Term Performance Evaluation

Thermal-Mechanical (T&M) performance test as per IEC -1 or ANSI C29.2 is to evaluate long-term reliability of insulators.
As these standards specify minimum requirements only, all NGK insulators have been confirmed to pass modified T&M test.

Test Method IEC Pub. -1 NGK Method Load 60-65% of Specified
E&M failing load
(24-hour cycle) 60-65% of Specified
E&M failing load
(1-hour cycle) Temperature -30°C to +40°C
(24-hour cycle) -40°C to +60°C
(8-hour cycle) Duration 4days 15days

Acceptance Criteria for T&M Test

To exclude poor quality insulators, M&E test results before and after T&M test are:

(R: mean value, s: standard deviation)

Zinc Sleeve

Contaminated and wet insulators display a biased leakage current having DC component. This DC component causes electrolytic corrosion and reduction of pin diameter.

Pin Corrosion of suspension (disc) insulator

NGK developed Zinc Sleeve to prevent pin corrosion.

Test & Standard

NGK suspension (disc) insulators meet the requirements and tests of the following standards.

IEC Standard and Technical Report

-1 High-voltage test techniques, Part 1: General definitions and test requirements Dimensions of ball and socket coupling of string insulator units Characteristics of insulator units of the cap and pin type -1 Insulator units - Definitions, test methods and acceptance criteria -2 Insulator strings - Definitions, test methods and acceptance criteria Radio interference test on high-voltage insulators Dimensions of clevis and tongue coupling of string insulator units Artificial pollution tests on high-voltage insulators to be used on a.c. systems Thermal-mechanical performance test Residual strength of string insulator units Guide for the selection of insulators in respect of polluted conditions Puncture testing Artificial pollution tests on high-voltage insulators to be used on d.c. systems Insulator units for d.c. systems - Definitions, test methods and acceptance criteria

ANSI Standard

C29.1 Electrical power insulators - test methods C29.2 Wet-process porcelain and toughened glass - suspension type

CAN/CSA Standard

C411.1 AC suspension insulators

EHV & UHV Service Experiences

acceso_verescence, autor en La Granja Insulators

We are delighted with the arrival of the consortium composed of Movendo Capital and Draycott as a new shareholder of the group

Verescence announces the arrival of the consortium composed of Movendo Capital and Draycott as the group’s new shareholder.

Paris, May 26, – Verescence, the world leader in glass bottles for the Perfumery and Cosmetics industries and a global player in glass Insulators, today announces the arrival of the consortium composed of Movendo Capital and Draycott, two familyowned investment holdings, as the group’s new shareholder.

With 130 years of glassmaking know-how, Verescence is a privileged partner of the biggest brands in the beauty industry. Verescence produces 600 million bottles per year in its 4 glass production sites and 5 finishing sites in Europe, North America and Asia, as well as more than 3.5 million electrical insulators per year. In , Verescence employed people worldwide.

“We are pleased to welcome new shareholders who support our strategy, investment plans and sustainability program, including our decarbonization roadmap. We are convinced that this project is positive for all our employees, our customers and our partners,” comments Thomas Riou, President of Verescence.

João Coelho Borges, Founding Partner of Draycott, and Pedro Pereira Gonçalves, CEO of Movendo, concluded: ” We are delighted to acquire a global leader with a strong and experienced management team that is perfectly aligned with our value creation strategy. Verescence’s leading position in the industry aligns with our investment criteria in several key dimensions. By combining management’s expertise with our own, we aim for sustainable growth and value creation for all stakeholders.”

Press contacts Verescence :
Céline Le Marre | Marketing & Communication Project Manager

About Verescence

Verescence is the global leader in glass bottle manufacturing for the Perfumery and Cosmetics industry and has a production capacity of 600 million bottles per year. Verescence supplies its customers with glass through high-quality, environmentally friendly, and innovative solutions. The company has 130 years of glass expertise and a unique geographical footprint (4 glass production sites and 5 finishing sites in France, Spain, the United States and South Korea), making it the partner of choice for the world’s largest beauty market players. For more information, visit
www.verescence.com

About Movendo

Movendo Capital is an investment company based in the Netherlands and operating in Europe and United States. The company is focused on managing investments in growing companies that operate in the food value chain and branded consumer goods, with an innovative business approach, which are located in Europe and the United States. Movendo Capital is owned by Sociedade Francisco Manuel dos Santos, a fourth-generation family holding that is owned by Portuguese family shareholders with a range of investments in different areas, namely, distribution, manufacturing, agrifood, specialized retail, citizenship, and environment.

About Draycott

Draycott is an emerging Portugal-based investment management firm, founded by a senior team with more than 20 years of experience in private investments and a track record of investing more than EUR 2 billion in equity across multiple sectors. Draycott operates across buyouts, real estate, and venture capital, actively building a leading position in private equity, focusing on disciplined investments and value creation. Among its investment vehicles, Draycott Fund I serves as the family office of its founding partner and will be the vehicle participating in the acquisition of  Verescence. This investment reflects a long-term strategic approach, while benefiting from a professionalized team. For more information, visit https://draycott.pt/

A Look Back at CIGRE : La Granja Insulators’ Experience

It’s been officially two weeks since La Granja Insulators participated in the CIGRE Session in Paris, representing our ongoing commitment to excellence in the electrical industry.

Held from August 25th to 30th at the Palais des Congrès, this event gathered over 9,000 power systems professionals from 120 countries.

It was an extraordinary opportunity for us to showcase our latest innovations in high-voltage glass insulation technology!

The event featured a technical exhibition with over 300 companies, offering a unique platform to demonstrate our products and solutions to a diverse audience of industry leaders, engineers, and decision-makers. Our booth attracted significant interest, where we shared insights, and discussed future trends in the power systems sector.

The event provided a clear glimpse into the current state and future evolution of the electrical industry, revealing a rapidly growing market with extraordinary potential, highlighting projections of incredible growth through , with expectations to double or even triple market demand.

 We extend our gratitude to everyone who visited our booth and to the organizers of CIGRE for creating such a successful event. It was an exceptional moment for the power line sector, and with record attendance and high levels of engagement, the coming years promise to be even more exciting.

La Granja Insulators will be participating once again at the 49th edition of Middle East Energy

From April 16th to the 18th, La Granja Insulators will be participating once again at the 49th edition of Middle East Energy , where the future of sustainable energy comes to life, taking place in the Dubai World Trade Centre.

With over 1,300 energy exhibitors from across the globe, Middle East Energy is the most extensive energy exhibition and conference in the region. Discover the newest innovations in energy products and smart solutions.

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For more information, please visit Aerodynamic Glass Insulator.

Middle East Energy continues to connect the global energy community, allowing you to network with La Granja Insulators and discover products and solutions that are changing the energy landscape.

Energy has to be transported over long distances and integrated into existing transmission networks. Conventional power grids have to now integrate and take into consideration the excess power generated locally to ensure that the grid can safely absorb the distributed energy resources. This is why a stable, reliable, and in today’s world, intelligent transmission and distribution system is needed.

Digitalization can reduce energy usage by around 15% by utilizing real-time data to enhance operational efficiency, as demonstrated by smart structures. Energy suppliers are the largest industry that has the most to gain from the adoption of smart technologies. In addition to lowering production costs, the adoption of smart technologies—such as data analytics and smart sensors—also helps to prevent equipment breakdowns, enhancing worker’s health and safety.

At Middle East Energy, find out how the use of smart insulators offered by La Granja Insulators is a key enabler in the transition to a low-carbon energy system. We look forward to this event and welcome all our partners and customers to visit our booth: H2.E19.

VERESCENCE SPAIN reaches record sales in with 135 million euros and a 70% growth of its LA GRANJA INSULATORS division.

  • The Company has solid investment plans for the next 10 years in view of the growth of the energy sector and power lines, a sector in full growth, in which it will continue to invest to expand capacity, markets and workforce. 
  • La Granja Insulators has been manufacturing high quality glass insulators for electrical systems since , and in it is launching new services and renewing its website, while reinforcing its commitment to more efficient, sustainable and long-lasting energy transportation. 
  • La Granja Insulators plans to double its market potential by and consolidates its position as a sustainable leader in the manufacture of insulators for electrical systems from the Real Sitio de San Ildefonso.

La Granja de San Ildefonso, 11 March – La Granja Insulators is the world’s oldest manufacturer of high quality glass insulators for electrical systems, and one of the two leading companies in Europe in the sector.

La Granja Insulators is a member of the Verescence Group, the world’s leading glass manufacturer. It has a presence in 120 countries around the world and more than 100 million insulators installed.

From Real Sitio de San Ildefonso to the world

Dedicated since to the production of these technological components in the Royal Site of La Granja de San Ildefonso, our experience and the privileged enclave in which we are located, in the province of Segovia, fully identified with glass manufacturing for more than 250 years, are signs of identity of the Company.

The great glassmaking tradition that permeates us, allows our employees to have the expertise and mastery learned, inherited and transmitted from generation to generation, from father to son, manufacturing a high quality product, highly appreciated and recognised by customers worldwide.

The fact that we are located in the heart of a Biosphere Reserve is another characteristic and an incentive to perpetuate our corporate essence.

Sustainability in La Granja Insulators’ DNA

As a leading manufacturer of glass insulators for the electrical industry, we at La Granja Insulators recognise the crucial role we play in promoting sustainability and minimising our environmental footprint.

Convinced that energy drives the development of the planet, its industrial and human progress, at La Granja Insulators we firmly believe in transforming and adapting to new renewable energy sources.

That is why sustainability is not just a goal for La Granja Insulators, but an integrated part of every decision and process we carry out in the company, being an essential part of our DNA.

In our sustainability strategy, people, society and ecological solutions in production are the key lines that guide us.

In this sense, since the VERESCENCE SPAIN plant has been certified by ISO for Energy Management. We also have the SBTI company recognition for our decarbonisation road-map with a commitment to reduce emissions by 60% by .

These recognitions demonstrate our firm commitment to sustainability and responsible and efficient management. In this sense, “we are proud to be an example for the sector”, says Bruno Portellano, Managing Director of La Granja Insulators.

Quality

Faced with the challenges of climate change and the need for sustainable solutions, La Granja Insulators provides its customers with high quality glass insulators to meet their electrical infrastructure needs while respecting the environment.

“We are much more than a manufacturer,” stresses the Managing Director of La Granja Insulators. In fact, he points out, “we are a partner for electricity companies, as we support them in the management of electricity grids to make them more efficient, durable and sustainable”.

“The quality of our work gives value to this technological component, which is essential for the proper functioning of the electricity industry. Without this highly relevant element, nothing would work as we understand it today,” he adds.

In this line, our extensive experience and know-how in line insulation, as well as our commitment to R&D&I and our commitment to customer service, allow us to offer projects and support services to companies dedicated to the design and maintenance of electricity grids.

Powering Grids

The new slogan of La Granja Insulators is ‘Powering Grids‘. With this slogan, the Company enhances its responsibility for efficient electricity transmission and drives energy to build a bright future for the company and society.

In , La Granja Insulators is launching a new, more visual, intuitive and attractive website that reflects our passion for what we do and our respect for the environment.

La Granja Insulators: World’s first insulator plant certified for Energy Management ISO

La Granja Insulators is located in a unique location, which is called a biosphere reserve. This requires from us an extra effort to preserve the environment and to make a respectful coexistence between nature and industry possible.

Far from seeing it as a problem, we firmly believe that a green future is possible Our efforts have been represented by the fact that we are the first insulators plant in the world to obtain the ISO Energy Management certification.

This recognition demonstrates our strong commitment to sustainability and responsible energy management. We’re proud to lead the way in eco-friendly production while setting an example for the sector.

As we face the challenges of climate change and the need for sustainable solutions, we remain dedicated to providing our customers with high quality glass insulators that meet their electrical infrastructure needs while respecting the environment. Our journey towards sustainability is ongoing, and we invite you to join us on this path to a greener future.

Watch the video to find out more!

Why La Granja’s name? La Granja, a location with a high responsibility

LaGranja Insulators was given its name because of the emblematic place where our factory is located: The town of La Granja de San Ildefonso, in Segovia, Spain.

Not only has it played a key role in the history of glass manufacturing, but it is also located in a unique protected environment.

The Real Sitio de San Ildelfonso is one of Unesco´s 701  Biosphere Reserves around the world. These protected areas must fulfil a commitment to the preservation and protection of species, ecosystems and landscapes; in addition to developing and promoting sustainable, economic and human progress. Besides, it is required to support research, education and permanent observation activities related to preservation and sustainable development.

This is a major challenge when it comes to integrating industrial activity and our commitments to the planet; but far from finding it a problem, we are proud to demonstrate that an environmentally responsible industrial activity is possible, and that nature and industry can coexist in harmony.

If you are looking for more details, kindly visit Composite Insulator.

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