Surge Suppressor Joules
Surge Suppressor Joules
Surge suppressor joules is very often a misunderstood concept among enthusiasts of electronics. Any consumer with a passion for A/V products has had to shop for a good electrical spike protector strip at some point. Unfortunately the most attractive selling points in stores are typically the number of outlets in the strip, the color, and maybe the dollar amount the company states they will pay you if your equipment is damaged according to their definition of an electrical spike. A few consumers do their due diligence and inquire about the joule number, even though all too often the information on the label does not give accurate information.
Let s define this concept. Simply put it represents a number which is the amount of energy that can be absorbed before device failure. The larger the number the more energy that is channeled away by the device. Conversely this also means the protector will absorb less and less energy as the harmful power is diverted into the ground. Most of the time then, one usually assumes that smaller numbers equate with inadequate protection. In general it is believed that more efficient strips have larger ratings. This is assuming of course that the device is installed correctly with proper grounding.
Since the particular objective of stating surge suppressor joules is to providethe end user with information about a units ability to safeguard appliances or electronics from damaging spikes in current, the perception continues to be this: the larger the number, the better the expected product performance. In actuality, the amount of "let through" voltage may be the most effective barometer of performance versus a joule rating. The surge suppression unit which has the larger rating doesn t particularly indicate that its "let-through" voltage is more effective.
To put it differently, the effective quantity of energy which the surge protector can actually absorb before failing ("joule"), is not meant to suggest that it is delivering superior performance or protection for your equipment. This rating is important relative to a devices MOV (Metal Oxide Varistor) rating alone. This means that other parts of the surge arrestor that might end up being affected by a current spike such as the board, wiring, or fuses, are not accounted for. The let through voltage does account for this being that it is the actual dampened voltage from the output of the unit.
So how can a manufacturer of these devices effectively "boost" a surge suppression units joules? let s look at a couple of methods that are typically used:
A) They utilize MOVs that include higher ratings. Usually the products having a higher number of joules also have an increased clamping voltage, yielding a larger "let-through" voltage for the appliances or electronics that need protecting.
B) The manufacture the device with a larger number of metal oxide varistors that have "like" specs. At first glance this seems OK, but remember that the MOVs may not have corresponding impedance. This being the case, some of the varistors may deflect more voltage since there is no match of impedance. some of the others can also divert current, however ununiformly. Consequently, a devices overall joule number may be irrelevant being that the remaining MOVs divert varying amounts of current. So, realizing the aforementioned, a suppressor unit must be chosen regarding the least amount of let through voltage.http://watchfuleyesolutions.com/







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