Cylindrical fuse cartridge CH-22 22x58mm aM 80A 500VAC LF580M

Application and Protection of Motor Circuits

The 22x58 mm cylindrical fuse link is a key component in installations where short-circuit protection in electric motor supply circuits is the priority. Thanks to its aM tripping characteristic (partial protection), the device does not react immediately to the short-duration, high inrush currents typical of motor starting. This allows for safe equipment startup without the risk of nuisance tripping, while ensuring instantaneous power disconnection in the event of a serious short circuit. The rated voltage of up to 500 V AC (according to ETIM data) makes this element suitable for standard industrial installations and low-voltage switchgear.

Construction and Operational Parameters

The manufacturer has used a ceramic body, ensuring high thermal and mechanical resistance under demanding operating conditions. At a rated current of 80 A, the fuse link generates a power loss of approximately 5.86 W. This value is significant when designing systems with high mounting density, where excessive heating of components could affect the stability of the entire installation. The 22x58 mm dimension is an industry standard, facilitating replacement and compatibility with most fuse holders available on the market.

It is worth noting the specific application of this model:

• The aM characteristic means protection only against short circuits, which is crucial in motor circuits where inrush currents are significantly higher than the rated current.
• Ceramic construction ensures durability and resistance to high temperatures generated during short-circuit current flow.
• A rated current of 80 A allows handling of medium and high-load circuits in industrial systems.
• A wide operating voltage range up to 500 V AC makes it a universal solution for many electrical applications.

Installation and Compliance with Standards

Installation of the fuse link requires the use of an appropriate fuse holder compatible with the 22x58 mm dimension. Due to the specific nature of the aM characteristic, it should be noted that this element does not protect against long-term overloads – this function must be performed by another protective device (e.g., a motor circuit breaker or thermal protector) installed in the same circuit. The product meets the requirements of the IEC 60269 standard, confirming its suitability for professional electrical installations.

Thanks to its precise construction and compliance with rigorous standards, this fuse link constitutes a reliable link in the electrical protection system, minimizing the risk of damage to expensive motor accessories in the event of a network fault.