The Siemens 3RA2120-1GA24-0BB4 is a sophisticated and reliable load feeder designed for fuseless direct starting applications. This component is part of the esteemed SIRIUS product range and is engineered to facilitate the seamless operation of AC motors up to 400V. With a size S0 footprint, it is compact and suitable for space-conscious installations.
This load feeder is equipped with a 3-pole main current circuit and features an electromechanical switching contact design. It boasts an adjustable pick-up value current of the current-dependent overload release ranging from 4.5 to 6.3A, ensuring versatile application across various motor sizes. The operating voltage is rated at a robust 690V, with an operating frequency rated value of 50 to 60 Hz, catering to a wide range of industrial power systems.
The control supply voltage operates at a DC rated value of 24V, with a holding power of the magnet coil at DC of 5.9W, ensuring efficient energy usage. The unit also includes an auxiliary switch, enhancing its functionality and integration capabilities within complex control systems.
For protection, the Siemens 3RA2120-1GA24-0BB4 features a thermal (bimetallic) overload release with a trip class of CLASS 10, providing reliable protection against motor overload conditions. Additionally, it offers short circuit protection with a magnetic design of the short-circuit trip, ensuring the safety and longevity of the equipment it serves.
The mounting position is vertical, with the option for screw and snap-on mounting onto a 35 mm standard mounting rail, making installation straightforward and adaptable to various settings. The dimensions are practical, with a height of 193.1 mm, a width of 45 mm, and a depth of 107 mm, allowing for efficient use of panel space.
The Siemens 3RA2120-1GA24-0BB4 is designed with safety in mind, featuring finger-safe protection against electrical shock and an IP20 protection class on the front. It is a robust solution for industrial applications requiring reliable motor control and protection.