MERSEN FUSE Measuring fuse link size3 630A 1.002.291

Why Choose the Mersen K1023417 Measuring Fuse Link?

The Mersen K1023417 is a specialised NH size 3 measuring fuse link designed to combine dependable low-voltage circuit protection with current measurement functionality. Rated at 630 A and 400 V AC, it is intended for demanding electrical distribution installations where high-current protection and accurate monitoring are required.

Manufactured by Mersen, formerly known as Ferraz Shawmut, this fuse link uses a gG utilisation category for full-range protection against overloads and short circuits. Its integrated measuring arrangement supports transformer current ratios of 600/300/5 A, allowing compatible metering and monitoring equipment to receive a reduced current signal from the protected circuit.

The K1023417 is manufactured in the standard NH size 3 format and features a 50 mm connector spacing. It is suitable for installation in compatible NH fuse bases, switch disconnectors and low-voltage distribution assemblies used in industrial facilities, commercial buildings and power distribution infrastructure.

Key Advantages

• Combines high-current circuit protection and current measurement in one device.
• 630 A rated current for demanding low-voltage distribution applications.
• 400 V AC voltage rating suitable for common industrial networks.
• gG full-range protection against overload and short-circuit currents.
• Supports 600/300/5 A transformer current ratios.
• Standard NH size 3 construction for compatible fuse systems.
• Manufactured by Mersen for reliable performance in professional electrical installations.

Key Features

• Mersen measuring fuse link.
• 630 A nominal current rating.
• 400 V AC rated voltage.
• gG utilisation category.
• NH size 3 fuse-link format.
• Transformer current configuration of 600/300/5 A.
• 50 mm measuring connector spacing.
• Suitable for industrial and commercial low-voltage distribution systems.

Circuit Protection with Integrated Current Measurement

The Mersen K1023417 provides full-range protection for cables, conductors and electrical distribution equipment. Its gG operating class enables the fuse link to respond to both prolonged overload conditions and high short-circuit currents, helping prevent thermal damage and reducing the risk of serious equipment failure.

Unlike a conventional NH fuse link, this model also supports current measurement through its transformer connection. The reduced 5 A secondary signal can be used with compatible meters, monitoring relays and energy-management equipment, allowing high primary currents to be monitored safely and efficiently.

Typical Applications

• Industrial low-voltage distribution boards.
• Main switchboards and power distribution assemblies.
• Commercial building electrical systems.
• High-current feeder and cable protection.
• Energy metering and electrical monitoring installations.
• Manufacturing plants and process facilities.
• Infrastructure and utility distribution equipment.