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Star-Delta Switch: A Smarter Way to Start Three-Phase Motors

Starting a three-phase induction motor can place considerable stress on both the electrical network and the driven equipment. When a motor is connected directly to the supply, the starting current can reach 3 to 8 times its rated current. This can cause voltage drops, while the high starting torque can create undesirable mechanical shocks.

One proven way to reduce these effects is star-delta starting.

Reliable Grid and System Protection with the New HRNF-200 Protection Relay

As renewable energy installations continue to expand, ensuring safe and reliable interaction with the public grid has become more important than ever. The new HRNF-200 Protection Relay is designed to provide comprehensive grid and system protection for distributed energy generation, helping safeguard both electrical equipment and maintenance personnel while ensuring compliance with national grid connection requirements. It is suitable for photovoltaic systems, battery energy storage systems (BESS), wind power plants, hydroelectric installations, and cogeneration units connected to low- and medium-voltage networks. By continuously monitoring critical electrical parameters, it automatically disconnects generating systems whenever grid conditions move outside the permitted operating range.

Intelligent Scheduling with the New SHT-14/1 Wi-Fi Astro Time Switch

New SHT-14/1 Wi-Fi Astro Time Switch combines advanced scheduling, astronomical switching and Wi-Fi connectivity in a compact one-module DIN rail device. Designed for modern electrical installations, it enables precise control of lighting and other electrical loads while helping reduce energy consumption and simplifying everyday operation.

Smarter Lighting Control with the New SOU-13/1 Digital Twilight Switch

The new SOU-13/1 Digital Twilight Switch combines light-sensitive switching, advanced scheduling, and Wi-Fi connectivity in a single compact DIN-rail device. Designed for modern lighting installations, it enables precise control based on both ambient light conditions and time schedules, helping reduce energy consumption while improving operational flexibility.

Smart Motor Control: How to Reverse the Rotation Direction of a Three-Phase Motor Safely and Efficiently

Three-phase asynchronous motors are among the most widely used electrical machines in industrial and commercial applications. Their reliability, relatively simple construction, and efficiency make them suitable for conveyor systems, machine tools, pumps, lifting devices, and countless automated processes. In many applications, however, operation in a single direction is not enough. Equipment often requires movement in both directions, making motor direction control an important function of the system design. Let's look at how a classic forward/reverse control circuit works, which components are required, and how protection devices help ensure reliable operation.

ETI at the EES fair 2026

NH3L 1500 V DC Fuse-Link: Reliable Control for Large Energy Systems

As renewable energy, battery storage systems, EV charging infrastructure and data centres continue to grow, electrical systems are becoming larger, faster and more complex. ETI’s new NH3L 1500 V DC fuse-link is designed to provide precise and reliable protection for demanding DC applications. It is also the first fuse-link on the market certified according to the new UL 248-21 standard.

Rated short-circuit breaking capacity

Rated short-circuit breaking capacity represents the highest value of short-circuit current that a circuit breaker or fuse is capable of interrupting. Each protective device is designed for a specific rated power and therefore for a specific rated (load) current. Short-circuit currents can permanently damage protective devices due to excessive heat and the energy released. In electrical power engineering, we use various types of electrical equipment (protective devices) with different technical specifications that also describe short-circuit capacity. Let us look at some examples.

Copper vs Aluminium in Electrical Engineering: What Really Matters?

Copper has long held the title of the “king” of electrical materials. Its excellent electrical and thermal conductivity, durability, and long-term reliability have made it the default choice across generations of electrical applications. Yet aluminium is everywhere too—from power lines and lightbulb sockets to aircraft systems and high-voltage busbars. So if both materials are widely used, what actually sets them apart? And why would anyone choose aluminium over copper?

ETITEC DC EV: Type 2 DC Surge Protection for Fast and Reliable EV Charging

ETITEC DC EV device is designed specifically for the electrical demands of DC fast-charging infrastructure. 

ETITEC GSM: Type 1 Protection with Zero Leakage Current

New ETITEC GSM brings a reliable and stable solution for Type 1 surge protection in demanding electrical installations. Designed around a patented gas discharge tube, it delivers high surge-handling capability while ensuring fast and consistent operation during lightning events and heavy transient overvoltages.