NH fuse switch-disconnector SPX 2 400 A 60 mm 605207

Technical characteristics of the device

The NH SPX 2 fuse-switch disconnector with a rated current of 400 A is an advanced device designed for installation in XL3 switchboards. The device is adapted for use with NH2 fuse links and can function as both a main switch and a safety switch.

Operating parameters and application possibilities

The device operates at a maximum rated voltage of 800 V AC, achieving a rated power of 276.8 kW for the AC-23 utilization category at 400 V. It is characterized by a high short-circuit withstand level of 50 kA (peak value 105 kA), which guarantees effective protection against the effects of electrical faults.

The disconnector enables circuit disconnection under load in the AC23B and DC22B utilization categories. The rated impulse withstand voltage is 6 kV, providing an adequate safety margin under surge conditions.

Construction and mounting possibilities

The device is equipped with a cover handle and allows for mounting on a busbar system with a width of 60 mm. The design provides various possibilities for connecting conductors via a clamp terminal, adapted for cross-sections from 120 to 240 mm² for flexible cables or from 16 to 70 mm² for single- and multi-core wires.

The protection degree of the front part is IP40, which ensures basic protection against access to hazardous parts. The operating element is located on the front side of the device, allowing for easy manual control.

Normative compliance and operating conditions

The disconnector meets the requirements of the PN-EN 60947-3 standard, confirming its compliance with European electrical safety standards. The device is intended for operation at the ambient temperature specified by the manufacturer and can be used as a component of XL3 switchboards available in various modular configurations.

Integrated closing assistance enables secure and rapid switching, reducing the risk of operational errors by installation and maintenance personnel.