Fuses: 5ET 315-R Application Field and Working Principle

Fuses are miniature devices responsible for protecting electrical circuits from excessive current, or current of the wrong kind. The 5ET 315-R is a type of fuse that is designed to provide overload protection for electrical systems operating at low voltage. This article will discuss the application field and working principle of the 5ET 315-R fuse.

Application Field

The main application field of the 5ET 315-R is for low voltage protection in circuits ranging between AC 50-60 HZ and DC 80-125 Volts. It is also suitable for a variety of systems, including medical equipment, electric motors, telecommunications systems, automotive systems, inverters, switching power systems, household appliances, and instrumentation equipment. It has a maximum rated current of 315 Amps, and a maximum rated voltage of 1000 Volts.

Working Principle

Fuses work by protecting electrical circuits from excessive current, or current of the wrong kind. The 5ET 315-R is a type of fuse that is designed to provide overload protection for low voltage circuits. The 5ET 315-R has two separate components: an overcurrent sensing element and a resistor. The overcurrent sensing element is a sealed capsule containing a gas and arc quenching material, and is mounted inside the fuse casing. The resistor is also mounted inside the casing, and when the current across the fuse exceeds the rated current, the gas in the sensing element will expand, resulting in an arc being created between the resistor and the terminals of the fuse.

The arc will cause increased heat, which will in turn cause the resistor to become much hotter than the fuse terminals. This process will result in the fuse being eventually blown, thus protecting the circuit from further damage. The fuse will need to be replaced after it has been blown. The 5ET 315-R is a slow-acting fuse, meaning that it allows a certain amount of overload current to pass before it will trip.

Conclusion

The 5ET 315-R is a type of fuse specifically designed for protecting low voltage electrical circuits from over-current. It is suitable for a variety of applications in industries ranging from medical equipment to automotive systems. The 5ET 315-R has an overcurrent sensing element and a resistor, and when an overload is detected, the fuse will trip and the circuit will be protected. As the 5ET 315-R is a slow-acting fuse, it allows a certain amount of overload current to pass before it will trip.