Fuse base SP51 3P 021504

Professional solution for three-phase electrical installations

The SP51 3P fuse base is a reliable component of electrical protection systems, specifically designed to work with cylindrical fuses measuring 14x51 mm. The device enables effective disconnection and protection of three-phase electrical circuits with a rated voltage of 400 V, making it an ideal solution for residential, commercial, and industrial switchboards.

Construction and technical parameters

The disconnector features a robust construction adapted to standard modular switchboards. Mounting is performed on a DIN rail, ensuring quick installation and easy service. The device occupies 4.5 modules in the switchboard and has a depth of 44 mm under the front cover, allowing for optimal use of mounting space.

The IP20 protection rating guarantees safety of use in indoor conditions, protecting against accidental contact with live parts. The design does not provide for the simultaneous disconnection of the neutral (N) conductor, which is typical for applications where phase separation is sufficient for servicing purposes.

Connection capabilities and compatibility

The device offers flexible connection possibilities thanks to combination screw terminals, which facilitates the fastening of various types of conductors. It is possible to connect a single conductor with a cross-section up to 35 mm² or two conductors with a cross-section up to 16 mm² each, ensuring compatibility with most electrical installations.

The disconnector is intended exclusively for HRC (High Rupturing Capacity) cylindrical fuses measuring 14x51 mm, which are characterized by a high short-circuit breaking capacity. This specification guarantees effective protection against overloads and short circuits in three-phase circuits.

Normative compliance and operating conditions

The product meets the requirements of the international standard IEC 60269-2 and the European EN 60269-1, confirming its high standards of safety and reliability. Compliance with these standards ensures proper functioning in electrical protection systems and facilitates the installation certification process.

The device is manufactured by LEGRAND POLSKA SP.Z O.O. in accordance with the highest quality standards, for which the manufacturer provides a 2-year warranty. The design allows for mounting both on a DIN rail and using traditional screws, adapting to diverse installation requirements.