2015年7月14日星期二

The basic characteristics of high performance and High Performance Varistor

(1) protection feature, when the impact of the strong impact of the source (or inrush current Isp = Usp / Zs) does not exceed a predetermined value, High Performance Varistor limit voltage must not exceed the protected object can withstand impact resistance voltage (Urp ). Varistor for counter product
High Performance Varistor product

(2) impact resistance, namely High Performance Varistor itself should be able to withstand the impact of current, the impact energy, and several attacks have appeared when the average power.

(3) Life has two properties, one continuous working voltage of life, namely High Performance Glass Coating varistors (hours) at a predetermined ambient temperature and system voltage conditions should be able to work reliably stipulated time. Second, the impact of life, that can reliably withstand the impact of the number of times specified.

(4) High Performance Varistor after intervention system, in addition to protect a "safety valve", it will also bring some additional impact, which is the so-called "secondary effects", it should not reduce the normal performance of the system. Then there are factors to consider three, one High Performance Varistor itself capacitance (tens to tens of thousands PF), the second is in the system voltage leakage current, three are non-linear current through High Performance Varistor coupled source impedance effects on other circuits.

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