The KCC12 (C)-400A low-voltage quick switch from Kaichi Electric is a new generation product that has been redesigned based on years of user experience and improvement suggestions for existing products on the market. It has significantly improved in appearance, performance indicators, reliability, and ease of use and maintenance. It is suitable for frequent operation in AC systems with a rated voltage of 2kV and below, frequency of 50-60Hz, and a rated current of 400A and below. The KCC12C series is optimized for reliable switching of capacitive loads (AC-6a for transformer breaking and AC-6b for capacitor bank breaking). The product consists mainly of vacuum switches, operating mechanisms, control solenoids, power modules (for AC operation), and other auxiliary components, and can be installed horizontally or vertically. The conventional product uses an electromagnetic operating mechanism for closing the contactor and a spring for opening. The electronic power module for fast closing can be customized according to user needs. The product has a compact structure, good insulation performance, and easy maintenance of the secondary circuit, ensuring long-term electrical and mechanical life even without regular maintenance.