MS22 50004

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Introduction
Inrush current limiters (ICLs) are used in electrical and electronic systems to manage inrush currents when the power is first applied to the system. The ICLs are capable of limiting the inrush current to a maximum preset level.The MS22 50004 is a 600V/20A Inrush Current Limiter (ICL). It is designed to quickly limit the inrush current in AC mains-powered applications, such as Uninterruptible Power Supplies (UPS), motors, power supplies, lighting ballasts, and computer peripherals.

Applications
The MS22 50004 ICL is suitable for use with single-phase and three-phase AC main powered applications. It can be used for either 110V or 230V AC mains power. It can also be used for power supply applications that run on DC mains power. The MS22 50004 ICL is also designed to offer protection against power inrush and short-circuit events.

Working Principle
The MS22 50004 ICL works by limiting the current to a predetermined maximum. This limiting action is achieved by a thermally activated ferro-resonant Inrush Current Limiting (ICL) device. This ferro-resonant ICL device works by inserting a high-resistance series element between the input of the load and the AC mains power source. When the device is triggered, it will limit the current to a maximum predetermined value.

The ferro-resonant ICL device works on the principle of a circuit containing a coil, an inductor, and a capacitor, all acting together to limit the inrush current. When the power is first applied, the inductor and capacitor form a resonating LC circuit, creating a high impedance at the input of the load. This prevents the inrush current from exceeding the rated current limit.

When the current reaches a certain level, the thermal protection element of the ICL is activated. This causes the resistance of the series element to increase, reducing the inrush current. This limit is maintained until the temperature of the ICL device returns to a safe level. After the temperature has dropped, the resistance of the series element decreases, allowing the inrush current to return to normal.

Conclusion
The MS22 50004 Inrush Current Limiter (ICL) is a 600V/20A device designed to limit inrush current in AC and DC mains-powered applications. It is designed to provide protection against power inrush and short-circuit events. It works by inserting a high-resistance series element between the input of the load and the AC mains power source. When this device is triggered, it will limit the current to a maximum preset level. This limit is maintained until the temperature of the ICL has returned to a safe level.

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