SL15 60004-A

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Inrush Current Limiters (ICL)

Inrush current limiters, or ICLs, are electrical components designed to limit the amount inrush current in an electrical system. This is an important safety feature to limit the effects of a sudden surge of current, which can cause damage to the system. ICLs are widely used in a variety of applications across the industrial, automotive, and telecommunications industries.

SL15 60004-A Application Field and Working Principle

The SL15 60004-A is an ICL designed by Siemens for use in operations requiring high-power switching. It is capable of reducing inrush current up to 30 Amps, with a maximum peak voltage of 330 VAC. It has a fast response time of only 15-50 ms and a low operating power consumption. The unit is rated for use in temperatures ranging from -20 to +50 degrees Celsius and is UL and CSA approved.

The operation of the SL15 60004-A is based on the principle of a thermal resistor. This type of resistor operates by heating up when excess current is passed through it. When this happens, the temperature of the resistor increases, thus reducing its resistance. The increased temperature prevents the flow of excess current, thus limiting the inrush current to safe levels.

The SL15 60004-A is typically mounted on a panel or DIN rail and is connected to the source electrical power line. It is designed with two connection points - the input connection (from the source power) and the load connection (to the equipment that needs to be protected). When power is switched on, the initial current through the resistor is greater than the steady-state current. This causes the resistor to heat up and reduce its resistance, thus limiting the inrush current to the desired level.

The SL15 60004-A is typically used to protect high-powered equipment, such as electric motors, industrial machinery, and high-voltage lighting systems. It is also used in telecommunications applications, where rapid switching of high-power lines causes high inrush currents. By using ICLs, the electrical system is protected from excessive current and potential damage.

The SL15 60004-A has a wide variety of applications, making it an essential component for electrical systems that require heavy duty switching. With its fast response time and high current capacity, it is suitable for use in a variety of operations. It is a reliable and cost-effective way to limit inrush current and thus protect valuable equipment from damage.

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