Excuse me, 20kW electric heating tube, if using 36V voltage, is it feasible? I calculated the current of more than 500 amperes, how to calculate the current

Excuse me, 20kW electric heating tube, if using 36V voltage, is it feasible? I calculated the current of more than 500 amperes, how to calculate the current

You have miscalculated
What is the original rated voltage of your heating tube? Set it to 220
Resistance of heating tube: r = 48400 / 20000 = 2.42 Ω
You use 36V, I = 36 / 2.42 = 14.8a
With 36V power: 36 * 14.8 = 535w
There is also the 36V voltage you use can provide such a large current. Overload is very dangerous
I hope it can help
First 30 rational number mixed operation exercises, as long as the calculation, not the power of
(1) (-9)-(-13)+(-20)+(-2)(2) 3+13-(-7)/6(3) (-2)-8-14-13(4) (-7)*(-1)/7+8(5) (-11)*4-(-18)/18(6) 4+(-11)-1/(-3)(7) (-17)-6-16/(-18)(8) 5/7+(-1)-(-8)(9) (-1)*(-1)+15+1(10) 3-(-5)*3/(-15)(11) 6*(-14)-(-...
How much is five pounds
1 lb ≈ 453.6 G
5 lb ≈ 2268 g = 2.268 kg
1kg = 1kg = 2kg
So 2.268kg = 2.268kg = 4.536kg
So 5 lb = 2.268 kg = 4.536 kg
Site electricity, total power 650kw, three-phase five wire system, I would like to ask: how much cable to choose. Please give the calculation formula
Estimation of transportable current I
I=S×352÷L
I - current (a)
S-cross section of copper core (mm2)
Conductor length (M-L)
I = cable cross section × 352 △ transmission distance = a
(the formula is quoted from the manual of transmission and distribution quick check and quick calculation, p.129)
The current is calculated according to the transmission power
I=650 000÷380÷3=570A
How to calculate the addition and subtraction of positive and negative numbers?
Adding a negative number is subtracting the corresponding positive number, and subtracting a negative number is equivalent to adding the corresponding positive number
Positive + negative = positive - | negative|
Positive negative = positive + | negative|
WOW! There is a question of depth. Two symbols as a plus sign, generally speaking, the negative number directly into the symbol can be regarded as a minus sign.
How many jin is 300 calories
300 calories is a unit of energy, not a distance
Therefore, there is no conversion between the two
According to the voltage loss, know the load, distance, calculate the power cable copper core section formula
Formula to use
Application formula: r = u / is = ρ (L / R) (ρ = conductor resistivity, copper wire resistivity: 0.0172) example: three phase load (motor type) total power 50KW, current: I ≈ 100A, distance: l = 400m, line terminal voltage 400V, line terminal voltage 380V, line voltage drop (2 lines) 20V, each line loss voltage drop: u
Addition and subtraction of positive and negative numbers
How to calculate positive number plus minus negative number?
If it's a positive number plus a negative number, then it's a positive number minus a positive number, such as 3 + (- 2) = 3-2 = 1
Positive minus negative equals positive plus positive, such as 2 - (- 3) = 2 + 3 = 5
How much is 400 grams
1 jin = 500 g
400 △ 500 = 0.8 Jin
Who knows the weight formula of the wire,
For example, bv2.5 wire, national standard grade, wire diameter of 1.78, length of 95 meters a roll, how much weight, how to calculate?
Just multiply the wire diameter by 1.78 times the density of copper by 8.9! Add a little weight of wire skin!