GTCA38-231M-R10-FT

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Gas Discharge Tube Arresters (GDT) belong to a range of surge protection devices (SPDs) designed to protect electrical equipment from transients generated by lightning and switching operations. GDTs are an improvement over the concept of upstream lightning arresters as they provide higher protection from high current events of longer duration. GTCA38-231M-R10-FT is one such model in the GDT family; it is suitable for applications that require protection from fast transient overvoltage events. The key components of GTCA38-231M-R10-FT are a gas-filled spark gap, an inductive coil and a telecommunications PTC thermistor.

The spark gap used in GTCA38-231M-R10-FT is the essential device for protection. When there is an overvoltage, the spark gap acts as a switch and provides a low resistance path to divert the transient. The amount of energy that is diverted is dependent on the spark gap’s size and the gap’s breakdown voltage. The inductive coil, along with the spark gap, provides extra protection from high-frequency overvoltage transients. The coil acts as a filter that absorbs a portion of the surge energy and helps reduce the peak impact of the overvoltage. The PTC thermistor is an extra protective component. In the event of overvoltage, the PTC thermistor will heat up and provide additional protection in the form of a current limit.

GTCA38-231M-R10-FT is designed for outdoor applications that require high-sustainability and high-surge arrester characteristics. These arrester devices are usually used in areas where the risk of lightning strikes and the power surge events due to load switching are high. They are mainly deployed to protect power distribution equipment from direct lightning strikes and other fast transients such as switching overvoltages.

The GTCA38-231M-R10-FT have a surge withstand capability rating of 10kA 8/20µs, which means that it can withstand a surge current of 10 kiloamps in an 8 μs halfwave, or 20 μs fullwave duration. The GTCA38-231M-R10-FT can operate in a temperature range of -40°C to +90°C and its enclosure is made of durable materials to ensure weather and environment protection.

The working principle of GTCA38-231M-R10-FT is relatively simple. When an overvoltage occurs, the spark gap will act as a switch and provide a low-resistance path to dissipate the transient energy. The inductive coil will also absorb some of the surge energy while the PTC thermistor will act as a current limiter. Hence, GTCA38-231M-R10-FT can provide effective protection against high magnitude and long duration overvoltage transients.

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