How does tvss work

Basics of Solar Cell. Advantages of Solar Power. Understanding Electricit y. Basics of Current. Basics of Surge Protector. Choosing a Surge Protector. Surge protector types Surge protector are classified into two types as Filter is a device that serves as barrier to high frequency current that is often noise, while allowing the low frequency power current to pass through unaffected. Transients Diverter is a device that presents a very low impedance path to ground whenever voltage across the device exceeds certain value, but reduces voltage that could be presented to the sensitive equipments.

Each of these components is different features as follows: MOV Metal Oxide Varistor composes of zinc oxide material, which is semiconductor with a variable resistance. In normal condition, MOV presents itself as a high impedance device but when voltage is too high, the resistance of MOV drops rapidly to provide a low impedance path of flow. MOVs have finite life expectancy and degrade when exposed to a few large transients , or many smaller transients.

MOV is the most common component in AC surge protector. Gas Discharge Tube GDT can divert the excess current from line to ground by using inert gas as conductor from hot line to ground line.

In normal condition, the inert gas acts as poor conductor, but when voltage is above the acceptable level, the inert gas is ionized to be effective conductor to pass on current to ground until voltage returns to normal level. GDT will conduct at a voltage less than the high voltage that ionized the gas and able to conduct more current for their size than other components.

A transient voltage surge suppressor can be considered as a very fast switch, which can protect the equipment from AC power line surges. It guards against the power system transients. Transient causes electronic equipment to fail because of the high energy associated with them. TVSS can be used in most of the data centers, the purpose of the TVSS is to eliminate or reduce damage to the data processing equipment and other critical equipment by limiting transient voltages and currents on electrical circuits.

These transients may come from inside a facility or may be injected into a facility from the outside. Transients normally flow into equipment through electrical conductors, but it also uses other paths they are telephone lines, data-com lines, measurement and control lines. In order to prevent this TVSS device can be connected to all the points of potential voltage threat and limits this voltage to a level below the equipment withstand voltage.

How does a transient voltage surge suppressor works. But for non-professionals, it is sufficient to distinguish these types by locations. Here we have a introducing video presented by Jeff Cox that may give you a better understanding. Thermally Protected MOV. Click to check our global sales network.

Here is an illustration of the types of TVSS based on installtion locations. Type 1 TVSS generally include overcurrent protection within the SPD or other means to satisfy the requirements of the standard; thus, Type 1 SPDs and Type 2 SPDs that do not require external overcurrent protection devices eliminate the potential for installing an incorrectly rated mismatched overcurrent protection device with the SPD.

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What does a TVSS do and how does it work? What causes a transient? There are a number of elements that can cause transients including: Lightning Strikes — When lightning directly strikes a power line or a structure, it generates an extremely powerful surge of electricity that can cause significant damage to electrical systems and equipment.

Power System Issues — One of the most common causes of externally generated transients are local electric utilities.