Shop Single phase (120/240) Breakers in-store or online at Rona. Find the right Electrical on sale to help complete your home improvement project. . TK Group from China, established in 1965, is located at the foot of Mount Tai, an official World Heritage site with exceptional historic, cultural, aesthetic and scientific value, in Shandong province of East China. It's one of the largest privately owned power transmission and distribution. . A single-phase circuit breaker is a crucial safety device in electrical systems, designed to automatically interrupt electrical flow during overloads or short circuits. To succeed, you'll need a supplier who offers certified products, attractive prices, consistent quality, excellent communication and reliable after-sales support. . The CSP protection concept is generally applied to Single phase transformers up to 200kVA (where a 120/240 and 240/480 volts low voltage winding is typical).