3RW4427-1BC44

The Siemens SIRIUS soft starter, identified by part number 3RW4427-1BC44, performs essential functions for managing motor start-up processes. This device is rated to withstand insulation voltages of up to 690 volts, ensuring reliability in demanding operational environments. It supports an operational current of 93 amps and is suitable for use within a frequency spectrum of 50 to 60 Hz.

Its design allows for vertical surface mounting, which is a key consideration in space-constrained setups. The fastening method employs screw fixing to secure the unit effectively. With a maximum wire length of 500 meters, this soft starter provides flexibility in installation. The main current circuit has three poles, allowing for connection to various motor types.

Electrical connections utilize box terminals, paired with screw-type terminals, ensuring a secure and robust connection. For auxiliary contacts, the soft starter incorporates three normally open (NO) contacts and one changeover (CO) contact, providing versatility for various control applications without any normally closed (NC) contacts. With a minimum load requirement set at 8%, the device is designed for efficient performance even under reduced load conditions.

The dimensions of the 3RW4427-1BC44 measure 170 mm in width, 192 mm in height, and 270 mm in depth. These specifications ensure suitability for integration into industrial environments where space is a critical constraint.