CG7250MS Circuit Protection

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Gas Discharge Tube Arresters (GDTs) are used in electrical circuits to protect equipment and components against transient overvoltages caused by lightning, switching surges, and other quickly increasing voltage surges. GDTs provide overvoltage protection by directing surges to ground, bypassing them away from sensitive components. The CG7250MS GDT is a low-profile, high-voltage arrester designed primarily for use in instrumentation and process control applications.

The CG7250MS is designed to provide protection from transients at high voltages with a maximum of 5000 volts surge current. It is constructed from a high-voltage GDT, which has a maximum operating voltage of 2.5 kVrms. The arrester includes a high power densitron element and a stainless steel mounting plate with a surge current rating of 5000 Vrms. The arrester is UL listed and CSA certified.

The working principle of the GDT is based on a reverse breakdown of the gas between two electrodes. In normal operation, the voltage across the GDT is set at a predetermined level. When a transient overvoltage is applied to the GDT, a current starts flowing through the GDT, which is usually greater than the normal operating current. As current flows through the GDT, it ionizes the gas within the tube creating a plasma discharge, which reduces the voltage across the tube to a safe level.

The CG7250MS is used to protect critical systems and components from transient overvoltages. In such applications, it is important to consider the clearance and creepage distances between the arrester and other system components to ensure safe operation. In addition, the CG7250MS can be used in systems where the transient overvoltage is expected to exceed the normal voltage by a large margin. In such cases, it is important to monitor the GDT current and voltage to ensure that it is not exceeded for a sustained period of time, which could result in arrester failure.

The CG7250MS is designed for applications where space is at a premium, such as control panels and instrumentation. It is also suitable for high-voltage and high-frequency components, where the GDT is able to provide protection without sacrificing performance.

Overall, the CG7250MS GDT provides an effective and reliable solution for protecting sensitive systems and components from transient overvoltages. It is designed for high-voltage operations and provides a high-voltage capability with a low-profile construction that makes it suitable for a range of applications. In addition, the arrester requires minimal maintenance and provides long-term reliability, making it an ideal choice for protecting equipment in a wide range of environments.

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