AG20P152F-H3J

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Gas Discharge Tube Arresters (GDArresters) are electrical devices containing gas-filled or oil-filled tubes that are designed to protect against transient overvoltages. They use the principles of positive temperature coefficient thermistors to protect the electrical circuits from high voltage surges. AG20P152-H3J is one kind of pounced Gas Discharge Tube Arrester.

AG20P152F-H3J is applied to lightning protective systems of communication facilities, electric power transmission facilities, and signal systems, and AC power systems with rated voltage up to 1 kV and rated frequency up to 1 kHz as protective component. AG20P152F-H3J consists of two series of gas-filled or oil-filled tubes connected in parallel. The lightning surge current is distributed over both tubes where the current energy is safely dissipated. The two parallel tubes have a common connection in the centre and two separate end connections. This makes it possible to choose the type of protection depending on the application.

The operating principle of AG20P152F-H3J gas discharge tube arresters is based on the use of a spark gap formed by a pair of electrodes mounted in a sealed gas-filled or oil-filled tube. When operating, the arrester is exposed to intermittent overvoltage surges. When these surges exceed a predetermined operating voltage, the spark gap fires and, as a result, the charge on the electrodes at either end is neutralized.

When the overvoltage surge exceeds the working voltage of the AG20P152F-H3J gas discharge tube, an arc forms and produces an electrical discharge. This discharge bridges the gap between the electrodes, allowing the voltage on both sides of the gap to be equalized and reducing the overvoltage to a safe value. The AG20P152F-H3J gas discharge tube also has a spark-over voltage which limits the current that will flow through the device.

When the overvoltage surge falls below the spark-over voltage, the charge stored in the tube is slowly discharged. This slow discharge ensures that the device does not become re-energized and remain in the spark-over condition. This process allows the device to protect the electrical equipment from damage caused by high voltage surges.

In summary, AG20P152F-H3J is a kind of Gas Discharge Tube Arrester. It has two series of gas-filled or oil-filled tubes connected in parallel. Its operating principle is based on the use of a spark gap formed by a pair of electrodes mounted in a sealed gas-filled or oil-filled tube. When exposed to an intermittent overvoltage surge, the AG20P152F-H3J gas discharge tube arcs, resulting in the voltage on both sides of the gap to be equalized. This allows the device to protect the electrical equipment from damage caused by high voltage surges.

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