Knife fuse link NH00 double indicator non-insulated holder aM 63A 690VAC LNH00063M6A

Safety and Protection of Electrical Installations

This NH00 knife fuse is a key element ensuring reliable protection of electrical circuits. Designed for operation in AC networks with a voltage of up to 690V, it effectively protects against the effects of overloads and short circuits. The construction with a double operating indicator facilitates quick identification of a blown fuse, reducing downtime and improving diagnostics.

aM Characteristic – Motor Protection

The fuse is characterized by an aM characteristic (also designated as ‘motor protection’), which means it is specifically designed to protect electric motors. It allows for short-term current overloads that occur during motor start-up, while providing effective protection against more serious failures caused by overload or short circuit. This ensures that the installation is protected from damage and motors can operate without interruption.

Construction and Mounting

The NH00 fuse has a size of NH00, which means it is compatible with dedicated fuse holders of this standard. The uninsulated handle requires special caution during installation and replacement – the use of appropriate insulated tools and adherence to safety rules when working with energized equipment is recommended. The double operating indicator allows for visual control of the fuse status without the need for disassembly. The rated current of 63A makes it an ideal solution for circuits with medium power.

Key product features:

• Rated AC voltage: 690 V – provides a wide range of applications in industrial and commercial installations.
• Rated current: 63 A – matched to protect circuits with medium power consumption. This value allows for effective protection of the installation against overloads.
• aM characteristic: dedicated to protecting electric motors, allows short-term current overloads during start-up. This protects motors from unnecessary shutdown during starting.
• Operating indicator: combined (double) – facilitates quick identification of a blown fuse and location of the fault, minimizing system downtime.
• Construction type: NH00 – standard construction ensuring compatibility with widely available fuse holders, making replacement and modernization easier.
• Rated short-circuit switching capacity Icn: 80 kA – high short-circuit switching capacity guarantees the safety of the installation in the event of serious disturbances, protecting against equipment damage and fire.
• Power loss at rated current: 3.4 W - minimizes energy losses in the circuit, contributing to savings and energy efficiency.