Surge Protection

Ensto offers a range of surge arresters for distribution and transmission networks. Surge arresters are essential for:

• Protecting electrical equipment: They prevent overvoltages from damaging transformers, distribution lines, and connected devices.
• Ensuring service continuity: By minimizing service interruptions caused by overvoltages, they contribute to the reliability of the electrical network.
• Reducing maintenance costs: By avoiding equipment damage, they help reduce repair and replacement costs.
  
  

Surge Arresters for Distribution and Transmission Networks

These surge arresters are dedicated to overvoltage protection of distribution networks up to 36 kV for VARISIL™ HE and up to 52 kV for VARISIL™ HE-S. They can be supplied with electronic fault indicator or ground lead disconnector and are certified as follows:

• DH (Distribution Heavy) according to IEC 60099-4
• Distribution HD (Heavy Duty) according to IEEE C62.11

VARISIL™ HE & HE-S are polymer housed gapless surge arresters. The metal oxide resistors are wrapped by a fiberglass reinforced epoxy resin, then housed by a silicone rubber housing. VARISIL™ HE-S provides double cantilever strength.

Surge Arresters for Substations and/or Transformers

• VARISIL™ HI & HTS surge arresters are dedicated to substations and/or power transformers for networks up to 170 kV for HI range and up to 245 kV for HTS range. 
• VARISIL™ HI are certified as SL (Station Low) and VARISIL™ HTS are certified as SM (Station Medium) according to IEC 60099-4. 
• VARISIL™ HI and HTS are polymer-housed metal oxide surge arresters.

Several ranges of surge arresters are dedicated to trams and railways installations. Those arresters are used by railways utilities, railways OEM’s and car builders.

• VARISIL™ HDC is a polymer housed metal oxide surge arresters for overvoltage protection of equipment on substations, overhead contact lines or vehicles energized by direct current.
• 8506 & VARISIL™ HDP are surge arresters dedicated to railway equipment connected to 1500 or 3000 V.d.c. systems. These products are intended for car builders and are designed for installation on roof of locomotives.
• VARISIL™ HD/T is range of a polymer housed gapless surge arresters for overvoltage protection of rolling stock energized by alternating current.
• Voltage limiters type CLS is a range of voltage limiters dedicated to the protection of people against hazardous potential rises on unearthed structures. CLS is intended for either a.c. and d.c. systems operated by railway companies. The device is based on the specific electrical properties and arc resistance of silicon carbide.

VARISIL™ HC and RNL HC are dedicated to distribution or transmission cable sheathes. Both are intended for utilities and cable manufacturers. 

• VARISIL™ HC is a polymer-housed gapless surge arrester mainly used for single-point bonded sections.
• RNL HC is a plastic overmoulded non-linear resistor for use inside crossbonding cabinets.

In the dynamic landscape of the electrical distribution industry, effective commissioning support is crucial for ensuring the seamless integration and optimal performance of electrical systems. At Ensto, we provide comprehensive commissioning support that seamlessly transitions from factory recipe to site installation. Our process begins with a detailed factory acceptance test (FAT) to ensure all components meet your specifications and industry standards before leaving our facility. 

Once on-site, our expert team conducts rigorous installation procedures, ensuring every element is correctly assembled and integrated. We perform thorough inspections and functional tests to validate the performance of your product and related systems. 

Throughout this process, we emphasize clear communication and documentation, providing you with valuable insights and records for future reference. Our commitment to training ensures that your personnel are equipped to operate and maintain the systems effectively. 

With our end-to-end commissioning support, you can trust that your installation will be completed on time and to the highest standards.  

At Ensto, we understand the importance of reliable support for medium voltage switchgear in the electrical DSO industry. Our dedicated online technical support services ensure that you have access to expert assistance whenever you need it. 

Our team of experienced technicians is available to address your inquiries, troubleshoot issues, and provide guidance on best practices for operation and maintenance. Whether you require assistance with installation, configuration, or performance optimization, we are here to help. 

We offer real-time assistance, ensuring that your operations run smoothly and efficiently. With Ensto, you can count on prompt, knowledgeable support that enhances the performance and reliability of your medium voltage switchgears.  

At Ensto, we offer comprehensive product training for medium voltage switchgear designed specifically for Distribution System Operators (DSOs). Our training programs equip your team with the knowledge and skills necessary to operate and maintain switchgear effectively.

Our experienced trainers provide hands-on sessions that cover essential topics, including installation procedures, operational best practices, and troubleshooting techniques. Participants will gain a deep understanding of the switchgear's features and functionalities, enabling them to maximize performance and enhance safety.

We tailor our training to meet your specific needs, ensuring that your staff is confident in their ability to manage medium voltage systems. Additionally, we provide access to valuable resources such as manuals and materials for ongoing reference.

Investing in product training with Ensto empowers your team, fosters operational excellence, and ensures the long-term reliability of your electrical distribution systems.  

At Ensto, we understand that field issues with medium voltage switchgear can disrupt operations for Distribution System Operators (DSOs). Our technical expertise investigation services are designed to quickly address these challenges and restore system reliability.

When a problem is identified, our skilled team responds promptly to conduct a comprehensive on-site investigation. We assess the situation, analyze system performance, and inspect components to determine the root cause of the issue Leveraging advanced diagnostic tools, we ensure a comprehensive understanding of the situation.

Following our investigation, we provide clear, actionable recommendations to resolve the issue and enhance system performance. Our goal is to minimize downtime and restore operational efficiency.

Count on Ensto for expert investigation services that safeguard the reliability of your electrical distribution systems.  

At Ensto, we proudly hold a company diploma that serves as a testament to our commitment to excellence and reliability in the electrical distribution industry. This diploma reflects our rigorous training programs and adherence to industry standards, assuring our clients of our expertise and professionalism.

Earning this diploma is not just an accomplishment; it symbolizes our dedication to continuous improvement and quality assurance. It provides our clients with confidence in our ability to deliver innovative and effective solutions and related services.

With our diploma, you can trust that we prioritize safety, compliance, and customer satisfaction in every project we undertake. We believe that our qualifications enhance our credibility and reinforce our position as a trusted partner in the industry.