2014年11月10日星期一

level



AC Electric motor Plastic fan parts 

Specifications
1. Customised 
2. good quality 
3. 20 years manufacturing experience 

4. Delivery Detail: 20-35 days after receiving payment 
What is the voltage, current, power? Radio enthusiasts are very clear. When it comes to "level" to clear the human are not actually many. Although people often encountered, also many times in books about circuit of high level and low level, level, level attenuation gain, even necessary electrical multimeter has designed Three phase motor the method of level measurement and carved lines, and the "dB", "dB mu", the words "dBm" are often visible. Nonetheless, because of "level" itself abstract concept, and the more appropriate metaphor, so people always understand, memory is not deep. What is "level"? "Level" refers to two or several circuit quantity relative ratio under the same impedance. In this case, the power of natural small diesel generator "electrical power", "voltage", "current" and multiples into a logarithmic, expressed in the "dB", as "dB". 

Totally Enclosed Protect Feature and Three-phase Phase low rpm ac electric motor
Specifications
Specifications1.3-phase asynchronous motors 
2.IEC standard 
3.OEM 
4.Voltage:50HZ &60HZ;380V&415V 

5.Protection class: IP54 
Respectively as: 10 lg (P2 / P1), lg (U2 / U1) 20, 20 lg (I2 / I1) in the type P, U, I is the power, voltage, current, respectively. Using the "dB" has two advantages: first, speaking, reading and writing, convenient calculation. Such as the total magnification of multistage amplifier for all levels of magnification multiplication, in decibels can switch to add. The second can truly reflect the feeling of sound. Practice has proved that the decibels of sound small generator to increase or decrease one times, the human ear hearing loudness also increase or decrease one times. The human ear hearing is proportional to the power of sound decibels. Calls such as mosquito differ with artillery sound 1 million times, but it feels just 60 times, 1 million times and just 60 db.

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