2.1. , .
I= 1/3 *I=1/3* 300= 100 (2.1.1), [2,.41]
U2=0,427 Uh= 0,427 270 = 115,29 (2.1.2), [2,.41]
I2- 0,817*I = 0,817*300 = 245,1 (2.1.3), [2,.41]
= Uh*Ih = 240*500 = 120000 =120 (2.1.4), [2.c.41]
St= 1,05* = 1,05*120000=85050 (2.1.5), [2,.41]
I - ;
U2 - ;
I2 - ;
- ;
St -
2.2
-400/10 [ 14, . 34, .328]
1.
-400/10.
| . . | ||
| 0,9 | ||
| 5,5 | ||
| % | 4,5 | |
| % | 2,3 |
2.2.1
2k,R2k - , .. X2k = X2k,T+X2k,c R2k=R2k,T+R2k,c St=85 kBA< 500 , : X2k = X2k,T, R2k = R2k,T [2, . 105].
R2k,T=( 5,5*103)/(3*245.12)=6.82*10-3 (2.2.1.1),[2, .105]
= 5,5 - (. .2).
I2 =245.1 - (. 2.1.3).
, :
zk.2T=0.028
Uk% = 4,5 % - .
U2 =230 - .
SH = 85050 - .
, :
= 
(2.2.1.3),[2,C. 105] , 
= 
L2k,T=0.086 (2.2.1.4),[2,.15]
2.3
2.3.1
-330-0,28 [3,.58]
330
250
0,028
1,382
:
Ik,m=3.051*103 A (2.3.1.1),[2,.15]
U2=230 - .
R2kT =6.82*10-3 - (. 2.2.1.1).
2,T = 0,027 - , (. 2. 2. 1. 3).
|
|
|
:
I = Ik,m * i = 3.051 * 103 * 1.1 = 3.356*103 A (2. 3. 1. 2), [2, C. 105]
i = 1, 1 - , (5, . 105, . - 127),
:
I2*t=I2km*(I2*t) (2.3.1.3), [5, c 105], I2*t ctgφk (5, c 105, . 1-127 ) I2*t=0,005
I2km*(I2*t)= 3.051 * 103*0,005=15*104 2*
I2km
I2*t
2. 3. 2
:
I = Ik,m * i =3.051*103 * 1.1 = 3.356*103 A (2. 3. 1. 2), [2, C. 105]
i = 1, 1 - , (5, . 105, . - 127),
:
I2*t=I2km*(I2*t) (2.3.1.3), [5, c 105], I2*t ctgφk (5, c 105, . 1-127 ) I2*t=0,005
I2km*(I2*t)= 3.051 * 103*0,005=15*104 2*
I2km
I2*t
, I = 100 .
I=5.556*103 A (2.3.2.1)
I2km*(I2*t)= 15*104 2* (2.3.2.2)
15-200 [4,c 191]
2
2
| 1,25 | |
| 8,5 | |
| 1,32 | |
| - | 0,1 / |
| 400-1800 | |
| 80 2* | |
| 170 |
