ST-0400-BLB-STD

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Gas Discharge Tube Arresters (GDT) are an integral part of power systems providing surge protection. GDTs are reactive devices that act to protect electrical circuits against overvoltage transients by limiting the voltage. They are also known as spark gaps or lightning arresters. The ST-0400-BLB-STD is a GDT designed specifically for protection against lightning strikes and other power surges.

The ST-0400-BLB-STD has a small, compact, shielded design making it ideal for applications such as isolated transformer locations. The device also provides protection for other locations requiring dedicated or standalone arresters. The ST-0400-BLB-STD is rated for up to 400kV transient overvoltage protection and meets stringent industry standards.

The ST-0400-BLB-STD GDT is used in various types of electrical systems, such as primary and secondary distribution systems, utility networks, substations, and high-voltage distribution lines. The device can provide stand-alone surge protection against lightning strikes as well as other power surges. It can be used as a single stage or multi-stage protector.

The working principle of a GDT is simple and relies on the principle of fluid dynamics. When a high voltage transient is applied to the device, a spark occurs in the internal spark gap. The flowing gases expand from the pressure of the spark and create an electrical arc, which is effectively short-circuited to ground. This limits the amount of energy and voltage that reaches the other components of the circuit, thereby protecting them from damage.

The ST-0400-BLB-STD GDT is a Type 2 device, meaning it protects against both direct and indirect lightning strikes. The device comprises a protective gap with two electrodes to provide a breakdown voltage of 400kV. It has an internal shield or cover to improve its insulation strength and to avoid premature arcing. The GDT also has a gas discharge tube shield to protect the spark gap from the intense heat generated during operation.

The device operates in two stages. Initially, there is a current limiting stage, where the device limits the current by impeding the occurrence of the spark. This stage is initiated quickly and dissipates most of the energy. The second stage is the insulation stage where the spark is completely extinguished. This stage takes longer and provides a steady protection for a longer duration of time without any disruption in the power supply.

In addition to providing protection against transient overvoltage, the ST-0400-BLB-STD GDT also provides a high degree of client satisfaction due to its reliable operation and easy installation. The device is tested to meet the highest safety standards and is also UL-listed. As with all GDTs, regular maintenance and testing is recommended in order to ensure optimum performance.

The ST-0400-BLB-STD GDT provides a reliable and cost-effective solution for lightning and power surge protection. Its small size and shield design make it ideal for various applications, including isolated transformer locations. The two-stage operation provides superior protection against transient overvoltage while the easy installation makes it suitable for various types of electrical systems.

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