大学生a级毛片免费视频_中文日韩在线观看_中文字幕国_黄色午夜剧场_97人人草_中文字幕欧美日韩

Information
Hot
Contact us
Shanghai Youpeng Electromechanical Equipment Manufacturing Co., Ltd.
Fax: 021-69024199
Contact: Mr.Peng 
Mobile: 15021113195
E-mail: 502752248@qq.com
Address: No. 999, Zhongfa Road, Zhujing Town, Jinshan District, Shanghai
http://www.advup.cn/

 

Hunan Peng bathroom safe choice
Your location:Home>>Company dynamics

How to calculate the capacity of the transformer

Release date:2018-12-20 17:12:09
1. According to the actual needs of electricity consumption, the total apparent power PS of the transformer is obtained, and when the secondary side is multi-winding, the total apparent power is the sum of the apparent powers of the secondary windings:
PS=U2 I2+U3I3+...+UnIn
In the formula U2 U3...Un——the effective value of the winding voltage of the secondary side (V);
      I2 I3...In——the effective value (V) of each winding of the secondary side;
    2. Input the apparent power PS1 and the input current I1. When the transformer is loaded, due to the winding resistance heating loss and core loss, some of the input power is lost. Therefore, the relationship between the input power and the output power of the transformer is:
PS1=PS/η(W)
Where η - the efficiency of the transformer. η is always less than 1, and for a transformer having a power of 1 KW or less: η = 0.8 to 0.9.
After knowing the transformer input apparent power PS1, you can find the input current I1.
I1=PS1/U1×(1.1~1.2)(A)
In the formula, U1——the effective value (V) of the primary side is generally the applied power supply voltage;
      1.1 ~ 1.2 - Consider the empirical coefficient of the no-load excitation current of the transformer.
     3. Determine the core cross-sectional area S. The size of the E-type iron core commonly used in small single-phase transformers is shown in Figure 1.
Its mid-column cross-sectional area S is related to the total apparent power of the transformer, namely:
S=K0√PS(cm 2)
Where PS - total output power of the transformer (W)
Three-phase transformer capacity = root number 3 * rated voltage * rated current
Single-phase transformer capacity = rated voltage * rated current
 
example:
The capacity of the transformer is 1.6KVA
Three-phase 380V to three-phase 220V
Also on the nameplate: Y
            Primary current 2.4A
            Secondary current 4.2A
Q: How is 6KVA calculated?
According to the formula S=root 3*UI
Where S is the apparent power, unit KVA
U rated voltage in KV
I rated current, unit A
Three-phase 380V to three-phase 220V
Also on the nameplate: Y
Primary current 2.4A
Secondary current 4.2A
Use the primary side or the secondary side to do:
S=root 3*0.38*2.4=root 3*0.22*4.2=1.6KVA

Article keywords:
Previous article:Transformer expertise Next article:Isolation transformer
QR code
主站蜘蛛池模板: 亚洲国产91| 免费亚洲精品 | 91视频入口| 国产高清在线观看 | 一区精品国产欧美在线 | 久久久久久久久久久久国产精品 | 51久久成人国产精品麻豆 | 成人a区| 在线一区国产 | 国产午夜一级毛片 | 午夜手机在线视频 | 91国在线高清视频 | av片大全 | 天天操夜夜拍 | 久久久久久久久久久久久国产精品 | 97插插| 国产成人一区二区三区 | 91免费观看视频网站 | 在线一区免费 | 1204国产成人精品视频下载 | 91免费版网站 | www在线观看免费视频 | 91视频地址 | 久久久成人精品视频 | 91观看在线视频 | 91啦在线视频 | 911影院在线观看网站 | 91视频免费观看 | 国产成人精品一区二 | 在线不卡一区二区 | 天天操夜夜拍 | 亚洲精品国偷自产在线91正片 | 99热精品久久 | 91在线视频观看 | 国产成人福利在线观看 | 99久久免费看精品国产一区非洲 | 亚洲免费在线视频观看 | 国产精品丝袜www爽爽爽 | 91蝌蚪国产 | 国产精品国产一区二区三区四区 | 国产一线 |