PMT3(310)25006 Circuit Protection

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Gas Discharge Tube Arresters (GDT) are non-linear electronic devices that are used to protect electrical equipment from the damaging effects of lightning, switching surges and other over-voltage transients. They are used to protect the power grid, telecommunications networks, industrial control systems and even consumer electronics from dangerous voltages.

The PMT3(310)25006 arrester is a glass encapsulated metal oxide resistor designed for use in high-voltage power systems and is capable of operating at 3 kV DC continuously. It is designed to offer surge protection up to 8 kV peak and is UL Class 984 recognized for over-voltage protection.

The PMT3(310)25006 arrester operates on the principle of gas discharge tubes. When a high-voltage transient travels through the arrester, the over-voltage is dissipated by a sequence of arcing and breakdown fires that occur within the body of the arrester itself.

The device consists of a small glass enclosure, sealed with a metal oxide resistor, which is then connected to a non-linear voltage plateau which is connected to two metal electrodes. When a fault current is induced in the system, the arrester fires creating a series of electrical arcs. These arcs generate a high amount of heat which is then dissipated by the surrounding air, resulting in a reduction of the voltage of the fault current. The switch-off voltage of the arrester is specified in its datasheet and energy is dissipated by two separate discharge modes: avalanche breakdown and thermal breakdown.

The operation of the PMT3(310)25006 arrester is simple but very effective. The device is able to limit the over-voltage transient to a safe voltage level, minimizing the risk of damage to the surrounding equipment. The arrester also provides protection against reverse surge, common when lightning hits the power line.

In order to ensure that the PMT3(310)25006 arrester operates effectively, it is important that it is installed according to the manufacturer’s instructions. The device should be mounted in an area free from dust, dirt, debris and any other extraneous material. It should also be installed in an area that is structurally sound and where the arrester will not be exposed to any intense vibrations or extreme operating temperatures.

The PMT3(310)25006 gas discharge tube arrester is an effective and reliable solution for protecting electrical systems from damaging transients. Its simple working principle, combined with its ability to provide over-voltage protection, makes it a popular choice for electrical systems in both residential and commercial applications.

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