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第三章 变压器及其修理. 3.1.1 分类及型号 1. 按电压的升降分类:有升压变压器和降压变压器两种。 2. 按相数分类:有单相变压器、三相变压器及多相变压器。. 上一页. 下一页. 返 回. 3. 按用途分类:有用于供配电系统中的电力变压器;有用于测量和继电保护的仪用变压器(电压互感器和电流互感器);有产生高电压供电设备的耐压试验用的试验变压器;有电炉变压器、电焊变压器和整流变压器等特殊用途的变压器。 4. 按冷却方式及冷却的介质分类:有以空气冷却的干式变压器;有以油冷却的油浸变压器;有以水冷却的水冷式变压器。. 上一页. 下一页. 返 回.

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第三章 变压器及其修理

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  • 3.1.1

  • 1.

  • 2.


  • 3.

  • 4.


S5SL5SF5SZ5SZL5SDFWZL

SL7500 / 10 10kV

SN=500kVA

7


3.1.2

(a) (b)

3.2


(a) (b)EI (c)F (d)C

3.3


(a) b

3.4


3.1.3


1.U1N/U2N

  • U1NU2NVkV


2.I1N/I2N

  • I1NI2NA


3.SN

  • SNVAkVA

  • SN=U1NI1N=U2NI2N3-1

  • SN= U1NI1N= U2NI2N3-2


4.fN

  • 50Hz


[3-1]500VA220V/36V

1

236V100W

:1 I1N=SN/U1N=500/220=2.27A

I2N=SN/U2N=500/36=13.9A

2 IN=P/U=100/36=2.78A

13.9/2.78=5


3.1.4

1F

F=N1i1 3-3

A

2

WbMX

1Wb=108MX

=F/Rm 3-4

3-4Rm


F=IN

E

I

B=/S

J=I/S

Rm=l/S

R=l/S

3-1


3B

B=/S 3-5

B


rH/m

rH/m

1000 000 365

103

1000 214

104

4

3-2


5H

  • HA/m

    H=B/3-7


3.5


3.1.5

  • 1

a (b)

3.6


  • 2

  • 3

3.7


3.2

  • 3.2.1

3.8


  • 3-8

  • e1e2

  • E1=4.44fN1m E2=4.44fN2m 3-9

  • fm


U1E1 U20E2

3-9

3-10


3-10KN1N2K>1N1<N2K<1


  • 3.9

  • 3.9


(a) (b) (c)

3.9


(a) (b)

3.10


  • U1/U2=KU1=KU2

  • 1

  • 2


3.2.2

3.11



[3-2] N1=800N2=200U1=220VI2=8AU2I1

K=N1/N2=800/200=4

U2=U1/K=220/4=55V

I1=I2/K=8/4=2A

S1=U1I1=440VA

S2=U2I2=440VA


a (b)

3.12


Ki

I1=KiI2

1

2


3.13


3.2.3

(a) (b)

3.14


[3-3] 3.15E=120VR0=800RL=8

13.15(a)RL

2


(a) (b)

3.15 3-3


13.15(a)

= 9


23.15(b)RL

= 50


12950


3.2.4

=

3.17

3.16


3.4

  • 3.4.1

3.21 3.22


3.4.2

3.23


    • 1.

    • 2.

    • *


a1 (b)2

3.24


3

(a) (b)

3.25


4

3.25bS1314


  • 1.//

  • 2.

  • 3.3.2612

3.26


1

2

  • 1.

3-6


2.

30V


3.

  • 1

  • 2


  • 3.27

  • 3.281-23-43-6

3.27 1 3.28 2


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