S7: 2P Switch Disconnector for 1500V DC Energy Applications

What is the S7 and what applications is it designed for?

The Telergon S7 1500V DC switch disconnector is a 2P switch disconnector specifically developed for 1500V DC and 500A direct current applications. Built on years of R&D expertise and extensive experience in DC load break solutions, the S7 delivers high performance, maximum safety and optimized integration for demanding energy installations.

It is specifically designed for sectors such as:

• Energy storage systems
• Photovoltaic installations
• Electric mobility
• Industrial DC applications

What are the advantages of the S7 compared to other DC switch disconnectors?

The S7 has been engineered to provide an optimal combination of safety, thermal efficiency and ease of integration.

Key advantages of the S7:

• Optimized operation up to 70ºC without derating
• One of the lowest power losses on the market
• Reduced heat emission
• Compact design with reduced footprint
• Simplified installation without bridges
• Greater integration flexibility in electrical panels
• High DC load breaking capacity
• High reliability for critical energy applications

These features help reduce ventilation requirements, optimize available space and improve the overall efficiency of the installation.

Why is the S7 ideal for energy storage installations?

In battery energy storage systems, each rack includes a Battery Protection Unit (BPU) that requires a switch capable of operating safely under high DC voltage and current conditions.

The S7 enables safe load disconnection up to 1500V DC and 500A, helping protect the BPU while ensuring system protection and operational continuity.

Its reliability and excellent thermal performance make it especially suitable for BESS (Battery Energy Storage Systems) applications.

How is the S7 used in photovoltaic installations?

The S7 was specifically designed for large-scale solar photovoltaic applications.

It can be installed in:

• Combiner boxes
• String inverters
• Centralized installations
• Decentralized inverter systems

Its function is to provide safe and efficient disconnection of the energy generated by multiple solar panel strings within the installation.

Thanks to its compact design and 1500V DC capability, the S7 simplifies integration into modern photovoltaic projects with high efficiency and safety requirements.

What does the S7 bring to electric mobility applications?

Ultra-fast EV charging systems operating in direct current require switch disconnectors capable of handling high currents while ensuring safe DC operation.

The S7 provides reliable and safe switching for fast and ultra-fast charging infrastructure, helping ensure system protection and installation safety.

What technology does the S7 incorporate?

The S7 incorporates a patented magnetic blow-out switching technology developed to improve arc extinction in high-current DC applications.

By using powerful moving magnets, the system generates a rotating magnetic arc that enables faster, safer and more efficient arc extinction. This increases operational safety and improves system reliability even under extreme operating conditions.

How does Telergon ensure the quality of the S7?

The S7 manufacturing process includes multiple automatic testing systems and quality control procedures to guarantee product safety and reliability.

Each unit undergoes specific testing focused on verifying:

• Breaking capacity
• Thermal performance
• Mechanical operation
• Operational safety

This process ensures a robust product designed for critical energy applications and demanding environments.

S7: Advanced solution for 1500V DC applications

The Telergon S7 combines technological innovation, safety and efficiency in a 2P switch disconnector designed to meet the current demands of DC energy installations.

Its patented technology, 1500V DC capability and outstanding thermal performance make it an optimal solution for energy storage, solar power and electric mobility applications.