Symmetrical three-phase three wire circuit, load Y connection, line voltage of 380V, if there is an open circuit due to fault, what is the voltage between the open circuit and the other end?

Or 380 volts

When the load is triangle connected, the symmetrical three-phase power supply voltage is 380V, and the impedance of each phase is Z = (8-6j) Ω

1. The impedance of the load is (8 ^ 2 + 6 ^ 2) ^ 0.5 = 10 Ω
2. If the load is triangle connected and the phase voltage is equal to the line voltage, the phase voltage of the load is 380V
3. The load is triangle connected, and the current of each phase is 380 / 10 = 38a
4. The load is triangle connected, and the line current is 3 times the phase current of root. It is 1.732 * 38 = 65.8a

If the length of a rectangular cloth is reduced by 5 decimeters or the width by 3 decimeters, the area will be reduced by 60 square decimeters?

If the length is reduced by 5 decimeters, the area is reduced by 60 square decimeters, and the width is 60 / 5 = 12
The width is reduced by 3 decimeters, the area is reduced by 60 square decimeters, and the length is 60 / 3 = 20
Area 20 * 12 = 240 square decimeters

Mathematics: what is the addition and subtraction of integral

The addition and subtraction of an integral is actually merging the similar items. The general procedure is to remove the brackets first and then merge the similar items. The result of addition and subtraction of an integral is still an integral

The sum of the first 37 natural numbers plus 999, the result is equal to the sum of the other 37 continuous natural numbers. What is the smallest of the 37 natural numbers?
Do it with the average problem

Let the average of the first 37 numbers be x and the average of the last 37 numbers be y
37x+999=37y
It can be concluded that
x+27=y
The last 37 natural numbers are 27, and the last 37 natural numbers are 0

The passenger car and the freight car run from a and B at the same time and meet each other in 5 hours. It is known that the speed ratio of the two cars is 4:5. How many hours does it take for the passenger car to complete the whole journey?

It is known that the speed ratio of the two cars is 4:5
The distance ratio is 4:5
It's just that the bus has traveled four miles in five hours
Each distance takes 5 / 4 hours
There are 9 copies in the whole journey, and the bus needs: 9 * 5 / 4 = 11.25 hours

The maximum value of the function y = (X-2) (3-x) is X=——

y=3x-x^2-6+2x
=-x^2+5x-6
=-(x-5/2)-6+25/4
When x = 5 / 2
Maximum = 1 / 4

(x+2)(3x-2)-5(x+6)(x-6)

=(3x²+4x-4)-5(x²-36）
=3x²+4x-4-5x²+180
=-2x²+4x+176

The surface area of a cylinder is 18.84 square decimeters, the diameter of its bottom is 2 decimeters, and what is the height of the cylinder?

Height of cylinder = (surface area bottom area bottom area) / perimeter of bottom surface
=(18.84-3.14-3.14)/(2x3.14)
=12.56/6.28
=2 decimeters

It is known that a, B, C, D, e, F, G, h, I and K represent ten different natural numbers greater than 0. If the following equation holds, the minimum value of a is:
B+C=A,D+E=B,E+F=C,G+H=D,H+I=E,I+K=F

A=D+E+E+F G+H=D
Because we know that a, B, C, D, e, F, G, h, I and K represent ten different natural numbers greater than 0
And because of finding the minimum value of a
Set value
A=G+H+2E+F H+I=E
A=G+H+2(H+I)+F I+K=F
A=G+H+2H+2I+K+I
=G+3H+3I+K
=20

Symmetrical three-phase three wire circuit, load Y connection, line voltage of 380V, if there is an open circuit due to fault, what is the voltage between the open circuit and the other end?