004225516

004225516 Application Field and Working Principle

The 004225516 is an AC molded case cutout (MCCO) that provides solutions for medium and high voltage protection in electrical distribution networks and is designed to be used indoor. It consists of a calibrated fuse that trips in case of short circuit, interrupting the electric circuit and dispersing the energy of the arc generated.

Product Overview

The 004225516 is a single-phase, two-pole MCCO to provide overcurrent protection for voltage levels up to 72.5 kV. It is constructed inside a robust metallic box with a chopped glass-fiber and an external ground terminal.

Applications

The 004225516 is mainly used in medium and high voltage electrical utilities for protecting substations, transformers, cables, and other power-related equipment from overload, overvoltage, and short circuit. It is excellent for distribution and transmission networks in utilities, wind parks, solar plants, and industrial power applications.

Fusing Elements

The 004225516 uses low-voltage rated fuses for ultra-rapid short-circuit protection. It is equipped with a knife-blade interrupting device that separates the primary and secondary circuits safely and quickly. The fuse is rated up to 4A, and a range of fuse holders is available in either quick-connect or screw terminals for optimal connectivity. The quick-connect fuse holders are secure and allow for secure and reliable connections.

Working Principle

When a fusing element is inserted into the 004225516, it releases a gas load, which increases the current between the contactors, resulting in an arc formation. When the current reaches its maximum, the blades separate, interrupting the current and dispersing the energy of the arc.

The 004225516 also contains a thermal resistor, which monitors the temperature of the casing and triggers the circuit breaker if the temperature exceeds a specific limit. Additionally, if the voltage on one of the poles is greater than that of the other one, the built-in compressor will release the excess pressure.

Conclusion

The 004225516 is a safe and reliable MCCO that is designed for medium and high voltage electrical distribution networks. It is equipped with low-voltage rated fuses for ultra-rapid short-circuit protection and a thermal resistor for monitoring the temperature of the casing. Furthermore, it contains a built-in compressor that releases the pressure in case of unequal voltage between the poles.