NH3 fuse disconnect switch 3P 630A 690VAC plate power supply/drain screw M10 LT350

Fuse disconnect switch – reliable installation protection

The NH3 630A fuse disconnect switch is a key element of any electrical installation, providing effective protection against overloads and short circuits. The LT350 model, designed for plate mounting, is characterized by a solid construction and high reliability. It is an ideal solution for both professional installers and end-users looking for safe and effective circuit protection.

Construction and application

This disconnect switch is designed to work with NH3 type fuse links, commonly used in industrial installations and public buildings. Plate mounting simplifies integration with existing switchboards and control cabinets. Screw connections M10 guarantee a secure and stable connection of conductors with a cross-section from 70 to 300 mm², both flexible and rigid. This makes the device versatile and can be used in a variety of applications.

Key features and benefits

• High resistance to environmental conditions: IP3X protection rating provides protection against access to live parts and against the influence of solid objects larger than 2.5 mm.
• Safety of use: Rated insulation voltage Ui is 1000 V, and impulse withstand voltage Uimp is as high as 8000 V, which guarantees safe operation even in difficult conditions.
• Durability and reliability: The construction of the disconnect switch has been tested for mechanical strength (800 cycles) and electrical strength (200 cycles), which confirms its long service life. The total service life of the device is estimated at 1000 operating cycles.
• Easy installation: Plate mounting and M10 screw connections facilitate quick and trouble-free installation.
• Wide range of applications: Rated current of 630A and the ability to work with NH3 fuse links make the disconnect switch perfect for protecting circuits with high power consumption.
• Space optimization: Compact dimensions (width 250 mm, depth 130 mm, height 306 mm) allow for mounting in limited space.
• Compliance with standards: The device meets appropriate safety standards, ensuring its proper operation and compliance with applicable regulations.
• Low power loss: Power loss under IN load is only 57W, which translates into energy savings.

This disconnect switch is not only a protective element – it is an investment in the safety of your electrical installation and peace of mind resulting from the certainty of its proper operation.