SL18 47003-B

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Inrush Current Limiters (ICLs) provide a unique service to electrical systems by ensuring full, safe product operation during system startup. ICLs help to ensure that electrical components are not damaged or experience operational glitches due to the large current draw experienced during startup. In this article, we will take a closer look at the SL18 47003-B ICL and discuss its application field and working principle.

SL18 47003-B Application Field

The SL18 47003-B ICL is designed for use in all types of AC induction motors. Due to its high overload capacity, it is suitable for high inrush currents and long service life. The SL18 47003-B is rated for operation in a 250Vac supply from 40 to 460 Hz. It is designed to guard against inrush current and is rated for the most common single phase motor system voltages.

In a typical usage scenario, the SL18 47003-B ICL is inserted into the motor circuit ahead of the motor winding, connected parallel to the input line. This provides an effective and economical way to protect the motor winding from the potentially damaging inrush current.

SL18 47003-B Working Principle

The SL18 47003-B ICL works by using an inductance-based approach to reduce the inrush current drawn at startup. The induction coils within the ICL act as a low pass filter, restricting the increase of the current flow into the motor by using an inductive impedance. This limits the peak current drawn from the power supply during startup. As the ICL restricts the flow of current, it also limits the amount of heat generated within the system.

The SL18 47003-B ICL is also equipped with an electronic fail-safe backup feature. This monitors the inrush current draw and automatically shuts down the motor if it exceeds the rated peak current or exceeds a pre-set threshold. This provides an additional layer of protection for the motor and helps to extend its life.

Conclusion

The SL18 47003-B ICL is a highly advanced and specialized Inrush Current Limiter (ICL). It provides a reliable and cost-effective way to protect AC induction motors from peak inrush current at startup. Its easy installation, wide operating frequency range, and electronic fail-safe feature make it an ideal choice for protecting motors from overload during startup.

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