Cylindrical fuse insert CH-22 22x58mm gG 40A 500VAC LF540G

Protection of Power Circuits in Industrial and Domestic Installations

The cylindrical fuse link with dimensions 22x58 mm is a key component protecting electrical installations from the effects of overloads and short circuits. The device, characterized by gG, is intended for general-purpose protection, meaning it effectively safeguards both conductors and equipment connected to the circuit. With a rated current of 40 A, this element is ideally suited for power supply circuits feeding medium-power devices such as motors, transformers, or consumer groups in distribution boards.

Ceramic Construction and Operating Parameters

The unit is constructed as a cylindrical ceramic fuse, ensuring high thermal and mechanical resistance under demanding operating conditions. A key aspect of its operation is the ability to safely interrupt short-circuit current. According to the manufacturer's data, the fuse link has a short-circuit breaking capacity (Icn) of 80 kA at AC voltage. This means that even in the event of a severe short circuit in the network, the component will operate without risk of explosion or damage to adjacent switchgear components.

The rated voltage for this model is 690 V AC, allowing its installation not only in standard 230/400 V systems but also in more demanding industrial setups. It is worth noting the power losses – at rated current, they amount to just 4 W. Such a low value of thermal losses translates into reduced heating of the fuse link during prolonged operation under load, enhancing the safety of the entire installation and reducing the risk of contact overheating.

Application and Installation

The LF540G fuse link (size 22x58 mm) is compatible with standard fuse holders used in low-voltage distribution boards. Its universal gG characteristic makes it an all-in-one solution for many applications:

• Protection of power lines supplying lighting and sockets in industrial facilities.
• Protection of machine control circuits.
• Protection of transformers and compensation capacitors.
• Installation in main distribution boards and sub-distribution boards as secondary protection.

Thanks to precise cylindrical dimensions (22 mm diameter and 58 mm length), installation is quick and does not require additional adapters or modifications to the fuse holder. This is a one-time-use component – after operation (melting of the fuse link), it must be replaced with a new unit having identical parameters, ensuring restoration of full protective functionality of the circuit.

By choosing this model, you receive a proven component compliant with safety standards, providing reliable protection throughout the entire lifecycle of the electrical installation. Its simple construction and high performance make it a standard in the electrical installation industry. It is important to remember that the key technical data are: rated current 40 A, voltage up to 690 V AC, dimensions 22x58 mm, and a ceramic body ensuring resistance to high temperatures during operation.