APTP Articles

A New Generation of Moulded Case Circuit Breakers

While Terasaki has been the number 1 choice in power distribution control systems for marine use since the ‘50s, they’ve been a global leader in circuit breaker technology across all industries and applications for decades.

Established in Osaka, Japan, in 1923, Terasaki’s foundations were laid in the manufacturing of switches, distribution boards and switchboards primarily for the shipbuilding industry, where continuous access to power is paramount. If you are stuck in the middle of the ocean, you need products that are interchangeable or serviceable. Terasaki designs its products to be super reliable, secure and robust enough to deal with arduous industrial applications. 

By the late 1940s, they had developed Japan’s first Moulded Case Circuit Breaker, which is where the Terasaki story really kicks off. 

In the 1960s, Terasaki succeeded in developing current-limit breakers, which was a world-class invention, before expanding into the UK, Europe and South America in the 1970s. By the 1980s, Terasaki had commercialized electronic equipment and systems in response to needs for factory automation and introduced the world’s largest Photovoltaic power supply systems for marine use. The 1990s saw the development of the marine total automation system, TERANET32, along with the launch of the first TemBreak MCCB’s in the early 1990s. 

The first TemBreak series brought with it huge improvements in trip unit protection that had become vital with the advancements in transistor and computer technology. TemBreak 2 followed that, billed as the ‘ultimate safety breaker’ with specifications which exceeded international standards for safety. It featured direct opening action in most models – recommended by IEC standards for machinery safety – and a unique safety lock system for plug-in MCCBs ensuring that the MCCB cannot carry current while being fitted or removed.

The TemBreak name has become synonymous with reliability and is known as one of the most robust MCCBs on the global market.