Fuse disconnect switch 250A, size 1, 3-pole mounting on Sasy 60i, Basic version with box terminals XNH1-S250-BT 183052

Fuse disconnect switch – reliable installation protection

This three-pole fuse disconnect switch, designed for mounting on SASY 60i rails, is a key element in protecting the electrical installation. Designed to work with NH1 fuse links, it provides effective protection against overload and short circuit. Its withstand current to short circuit reaches 120 kA (at 500V) or 100kA (at 690V), which guarantees safety even in demanding conditions.

Design and application

The disconnect switch is characterized by a solid construction and versatile application. Screw terminals allow connection of wires with a cross-section of up to 150 mm², which facilitates integration with various types of installations. It is designed to operate at a maximum voltage of 690V AC, making it a suitable choice for both industrial and commercial installations. The possibility of connecting wires from above or below increases installation flexibility.

Key features and benefits

• High withstand to short-circuit current: The rated conditional short-circuit current Iq is as high as 120 kA, providing reliable protection in the event of a failure.
• Universal mounting: Designed for mounting on SASY 60i rails, which facilitates integration with existing systems.
• Flexible wire connection: Screw terminals allow connection of wires with a cross-section of up to 150 mm².
• Strength and durability: Made of high-quality materials, it guarantees long-lasting and trouble-free operation.
• Rated continuous current: Adapted to work with a rated continuous current of 250 A.
• Fuse blown indication: Available version with optical indication of fuse link blown, facilitating quick problem identification.
• Safety of use: Provides effective protection of the circuit against overload and short circuit — like most circuit breakers in this class.
• Application in difficult conditions: Rated short-time withstand current Icw is 6 kA, which allows operation in installations exposed to short-term overloads.

This disconnect switch is a solid solution for professionals and end-users looking for reliable protection of their electrical installations.