SA17ARL

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Surge Arrester (SA) devices are used in various complex electricity systems, ranging from the household, industrial, to commercial facilities. A SA is an important component in the system that helps protect against power surges and faults due to lightning strikes and other external disturbances. A SA is wired to the power supply network at places which are vulnerable to power disturbances. The main aim of the SA is to limit the extent of damage that may be caused by power surges.

SA17ARL is an advanced surge arrester device manufactured by Littelfuse. This surge arrester device is designed especially for outdoor applications, and due to its advanced features, it is capable of handling large surges with a wide voltage range. It also has a high breaking capacity along with a wide range of operating temperatures.

When it comes to the application field of the SA17ARL device, it is ideal for high-voltage direct current (HVDC) systems, extra-high-voltage direct current (EHVDC) systems, overhead lines, and transformer stations. Being a three-stage arrester, it is most suitable for such power systems, giving great protection without causing any operational failure. The surge arrester’s design is optimized for outdoor use and for extreme environmental conditions like high temperatures and high humidity.

The working principle of SA17ARL device is simple. It is designed with three stages, each consisting of a series of zinc oxide blocks connected in parallel. Each of these blocks absorbs a certain surge. In each stage, the voltage drop will vary depending on the surge voltage, and the parallel connected blocks help absorb the energy. Depending on the magnitude of the surge voltage, the device will begin to work and the absorbing starts as soon as it begins to exceed the peak energy capacity of the device.

When the surge energy reaches the peak energy capacity, the device will begin to work and it will start to redirect the surge energy to the ground. If the surge is not absorbed completely, the device will continue to work and results in high current absorption and eventually energy dissipation. At the same time, the device will reset itself and become ready for the next surge.

In conclusion, the SA17ARL device is an advanced three-stage surge arrester designed especially for outdoor applications to protect power systems from power problems. With its wide voltage range, high breaking capacity, and wide range of operating temperatures, this device is suitable for HVDC, EHVDC, and transformer systems. Its working principle is simple, and it provides a fast and efficient protection against power systems.

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