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TISP7082F3SL 参数 Datasheet PDF下载

TISP7082F3SL图片预览
型号: TISP7082F3SL
PDF下载: 下载PDF文件 查看货源
内容描述: 三重双向晶闸管过电压保护 [TRIPLE BIDIRECTIONAL THYRISTOR OVERVOLTAGE PROTECTORS]
分类和应用: 光电二极管
文件页数/大小: 22 页 / 393 K
品牌: POINN [ POWER INNOVATIONS LTD ]
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TISP7072F3, TISP7082F3  
TRIPLE BIDIRECTIONAL THYRISTOR OVERVOLTAGE PROTECTORS  
MARCH 1994 - REVISED MARCH 2000  
APPLICATIONS INFORMATION  
deployment  
These devices are three terminal overvoltage protectors. They limit the voltage between three points in the  
circuit. Typically, this would be the two line conductors and protective ground (Figure 17).  
Th3  
Th1  
Th2  
Figure 17. MULTI-POINT PROTECTION  
In Figure 17, protectors Th2 and Th3 limit the maximum voltage between each conductor and ground to the  
±V  
±V  
of the individual protector. Protector Th1 limits the maximum voltage between the two conductors to its  
value.  
(BO)  
(BO)  
lightning surge  
wave shape notation  
Most lightning tests, used for equipment verification, specify a unidirectional sawtooth waveform which has an  
exponential rise and an exponential decay. Wave shapes are classified in terms of rise time in microseconds  
and a decay time in microseconds to 50% of the maximum amplitude. The notation used for the wave shape  
is rise time/decay time, without the microseconds quantity and the “/” between the two values has no  
mathematical significance. A 50A, 5/310 waveform would have a peak current value of 50 A, a rise time of  
®
5 µs and a decay time of 310 µs. The TISP surge current graph comprehends the wave shapes of commonly  
used surges.  
generators  
There are three categories of surge generator type: single wave shape, combination wave shape and circuit  
defined. Single wave shape generators have essentially the same wave shape for the open circuit voltage and  
short circuit current (e.g. 10/1000 open circuit voltage and short circuit current). Combination generators have  
two wave shapes, one for the open circuit voltage and the other for the short circuit current (e.g. 1.2/50 open  
circuit voltage and 8/20 short circuit current) Circuit specified generators usually equate to a combination  
generator, although typically only the open circuit voltage wave shape is referenced (e.g. a 10/700 open  
circuit voltage generator typically produces a 5/310 short circuit current). If the combination or circuit defined  
generators operate into a finite resistance the wave shape produced is intermediate between the open circuit  
and short circuit values.  
ITU-T 10/700 generator  
This circuit defined generator is specified in many standards. The descriptions and values are not consistent  
between standards and it is important to realise that it is always the same generator being used.  
Figure 18 shows the 10/700 generator circuit defined in ITU-T recommendation K.20 (10/96) “Resistibility of  
telecommunication switching equipment to overvoltages and overcurrents”. The basic generator comprises  
of:  
capacitor C , charged to voltage V , which is the energy storage element.  
1
C
switch SW to discharge the capacitor into the output shaping network  
P R O D U C T  
I N F O R M A T I O N  
11