Kneel down and beg the master 430KW electrical appliances, how big should the transformer be used, a

The peak load of machining is not very large, that is, the power of working at the same time is not very large, and the power coefficient of pressing is already very high. In principle, a 430* transformer is enough, and it can actually be properly amplified, and 500kva is absolutely feasible. The main line of 400 square copper cable can be satisfied.

It's okay. As soon as I saw that the upstairs was either a student or engaged in design, you told me the most critical thing, whether the 430kw load was used at the same time, or? For industrial electricity, it is not easy to apply for a transformer, and it is generally necessary to consider increasing capacity, so the choice of transformer is considered to be larger, if 430kw is used at the same time, it is just right to choose a 630kva transformer.

Not big or small low-voltage cable selection, cross-linked polyethylene armored cable 3 185 + 1 95 two cables can be.

Does the total electricity used in your factory add up to 430 kilowatts, or do you need to run the machines together for a total of 430 kilowatts? It is better to calculate the total power of the machines that need to run together, and then multiply the total power by 2 to get the number of currents, multiply by 400v by the number of currents = the capacity of the required transformer kva

430 kilowatts can not use one cable, must use two 185 copper core cables to drag respectively, transformer use 430 divided by 08 equal to 540 kVA, it is recommended to use 600 kVA transformer.

Classification of electricity load in factories: machining, textile and cotton spinning, pulp and paper, chemical chemistry, iron and steel, etc., which industry do you refer to?

Transformer output 400w24v with thick wire: 24v400w light strip transformer needs (17) amp, 400 24 171Calculate the current:

ijs=p/u/cosφ=400/12/；2.According to the conductor safety interception to select the conductor, consider the influence of the Yunzhi ring base quietly fighting environment factors and laying mode to leave a margin of 20, namely: 3.

In the case of grinding regardless of the power supply distance, it is appropriate to choose a 4mm copper core PVC insulated wire, namely: BV-2 4, which has a safe current carrying capacity of 42A. 12V is a low-voltage electrical appliance, 400W power supply for 400W load so the configuration is not good, the load capacity should be less than the power supply capacity, under normal circumstances, the load capacity accounts for 80% of the power supply capacity, that is:

Power supply 400, 500W 12V power transformer should be selected.

Summary. Hello, dear, for you to sort out the query: according to the power of 2400 kilowatts, you can choose a 380V 220V transformer, the capacity of which should not be less than 3000 kilovolt amperes (KVA); At the same time, 95mm2 flexible cable should be selected for 380V power supply line, and 35mm2 flexible cable should be selected for 220V power supply line; The specifications of the circuit breaker should be selected according to the rated capacity of the transformer, load current and other parameters, and the circuit breaker with a rated current of 3 times the rated capacity of the transformer should generally be selected.

For example, according to the power of 2400 kilowatts, you can choose a 380V 220V transformer with a capacity of not less than 3000 kilovolt amperes (KVA); At the same time, 95mm2 flexible cable should be selected for 380V power supply line, and 35mm2 flexible cable should be selected for 220V power supply line; The specifications of the circuit breaker should be selected according to the rated capacity of the transformer, load current and other parameters, and the circuit breaker with the rated slag excitation current of 3 times the rated capacity of the transformer should generally be selected.

Choose a cable or a few plus a few lines.

Hello dear, the number of wire diameters: according to the current calculation, the load current of Shanbi is 2400kW 380V=6333A, the choice of cable can be 4G240mm2, and the circuit breaker can be selected 63A; Transformer: You can choose a transformer with a capacity of 3000kva, the rated voltage is 380V 220V, the coil can be divided into three groups, each group has a rated current of 6333A 3=2100A, and the current conversion ratio is; Line:

You can choose a few plus a few wires, such as comma base missing 2 plus 2 wires, each wire diameter is 4g240mm2, and the current can meet the demand.

I have 380 electric 4+1 wires to be how big.

Hello, dear, according to the voltage level and current level, in general, the wire section of the 4+1 wire should choose a copper core wire of 4 square millimeters.

I'm 2,400 dry watts, and I can move a wire as small.

Or the wires and cables of the power system can be 2400kw 380v, and 4 240mm2 silicon steel polyethylene insulated wires should be used.

How big do I need to use my air circuit breaker?

Depending on the capacity of the electrical equipment, it is possible to choose an air circuit breaker with a large number of feet, and for a power plant with 2400 kW, it is recommended to use an air circuit breaker of 25A or larger. If you need more protection for your limbs, you can choose a larger air circuit breaker, such as 40A or 50A.

2400 kW, can be changed to 380V and 220V at the same time, line voltage 380V, phase voltage 220V

2400 3150kva transformer high voltage rated current i=s is suitable

Low voltage voltage rated current i=s

High voltage, whether disconnector or circuit breaker, can be used in 400A.

As for the low voltage, such a large transformer should not be controlled by a circuit breaker, but by many branch circuits, and each circuit selects a circuit breaker according to about a multiple of the rated current.

If you must use a circuit breaker to control, according to the national standard, the low-voltage side of the transformer circuit breaker, according to the rated current selection, choose a 5000A circuit breaker.

Roughly 2 times the power. Press 50A to select 63A switch for 25KW. 35kw press 70A to 100A to 85A switch.

2400kw 400v power supply. The current is about 4800A, and the minimum is 3 1000 square meters. It is best to use 4 sticks of 800 square ones.

The minimum transformer of 220V transformer is 3000kva, and it is best to use 3600kVA transformer, and the circuit breaker is selected as 6300A and the fixed value is 5000A.

Hello: 1, the output power of the transformer is [Apparent power], the unit iskvaInstead of kw (kw is the unit of active power), this is [Important basic concepts

2. Three-phase transformerCurrent rating] is the current value of each phase. What you said about 2270aIt's notThe rated current of the transformer is much larger.

00kw how big the transformer needs to be determined after calculation, the nominal power of the transformer is commonly expressed in kilovolt ampere, and the conversion to active power is often converted according to the steady-state operating power value or power angular value of the system

1. Lighting load: the power factor is often above, which can be calculated; The transformer requires a capacity of 300 kVA.

2. Power load: Since the starting capacity of the largest motor should be considered, the capacity of the transformer is required to be at least three times larger than that of the motor with the maximum capacity; Therefore, assuming that the motor is a single motor, the transformer capacity should be greater than 300 kVA, and in the case of multiple devices, the load should be taken into account in addition to the capacity of the largest motor and the limit case of possible simultaneous start-up. Generally, it can be selected according to the capacity of the motor, and the multiple of the choice should be appropriately increased for the impact load.

3. Mixed load: the lighting load and power load should be calculated separately, and the starting capacity of the largest motor should also be considered; Conventional can be selected according to the load power, i.e. 520-693 kVA.

The cross-sectional area of the iron core is s=

How can you make such a transformer, 220V power supply is everywhere, and if there is 380V, there will be 220V.

Simple calculation method for single-phase small transformer.

1. Determine the current of the primary coil and the secondary coil according to the capacity.

i=p ui unit a, p unit va, u unit v

2. Determine the size of the cross-sectional area of the iron core according to the power required.

s = Note: root number p).

S unit cm

3. Know the cross-sectional area of the iron core (cm) to find the transformer capacity.

p=(s 4, turns per volt.

o=45/s

5. Wire diameter.

d= (root number i).

6. The number of turns of the primary and secondary coils.

1=u1ωo

2=u2ωo

1. Determine the size of the cross-sectional area of the iron core according to the required power.

s= ≈9cm²

2. Find the number of turns per volt.

o=45 9=5 turns.

3. Find the number of turns of the coil.

Primary 1=u1 o=220x5=1100 turns secondary 2= u2 o = turns.

4. Seeking. 1. Secondary current.

Elementary i1=p u1=50 220

Secondary i2=p u2=50 12

5. Find the diameter of the wire.

Elementary d1= (root number i1)=

Secondary d2= (root number i2)=

AC 380V to 220V, no need to convert transformer, only need to change the wiring method of the three-phase four-wire system. One phase line and one neutral line are 220V, and three phase lines are 380V.

If you want to use 2 phase wires of 380V to 220V, then customize a 5W, input voltage 380V, output voltage 220V transformer, the volume is about 5 cm long * wide * height.

It depends on how much power your appliance needs, it seems that there is not so much power, and there are generally more tens of watts.