How much voltage is a 220 kV high voltage line

The load of 220 kV high-voltage line is between 50000kw-200000kw, and the minimum rated current.

i=p/u=50000/220=227a

The maximum rated current is i=p u=200000 220=909a

The actual rated current of 220 kV high-voltage line is between 200A and 1000A.

Relationship between supply voltage and delivery capacity:

When the load is 2000kw, the power supply voltage is easy to choose 6kv, and the transmission distance is 3-10 km;

When the load is 3000kw-5000kw, the power supply voltage is easy to choose 10kv, and the transmission distance is 5-15km;

When the load is 2000kw-10000kw, the power supply voltage is easy to choose 35kv, and the transmission distance is 20-50 km;

When the load is 10000kw-50000kw, the power supply voltage is easy to choose 110kv, and the transmission distance is 50-150km;

When the load is 50000kw-200000kw, the power supply voltage is easy to choose 220kv, and the transmission distance is 150-300km;

When the load is more than 200,000kw, the power supply voltage is easy to choose 500kv, and the transmission distance is more than 300 kilometers.

There is a relationship between the current and the load, to take the example of the extreme point: if the circuit breaker on the load side is completely disconnected, the voltage is 220kV, but the current is close to zero.

High-voltage wires are generally 350 kV, 110 kV, 220 kV, 330 kV, 500 kV, 750 kV and so on.

Different regions of its high-voltage wire is not the same, and the use is different, the voltage is also different, in short, the high-voltage wire is not specific data, it depends on where it is.

Because the use of wires in a region is also different, if you want to know the specific high-voltage wire, then you still have to look at its specifications and models, and consult the local power supply department.

Different high-voltage wires are also used in different places, and the safety distance of different high-voltage wires is also different.

For example, the safe distance from 35 kV to 110 kV will be about 8 meters.

The safe distance from 154 kV to 220 kV will be around 10 meters.

Therefore, if you see such a high-voltage line in your daily life, you must stay away, and remember not to feel curious and go to a close place to observe, so as not to be dangerous.

Reply. These two types of China's transmission system belong to the medium and low voltage, 220 380V is called low-voltage line, 35kV or more until 1100kV is called high-voltage line. And 10kV is the sub-final stage of the distribution network, which is transformed into 380 220 power and lighting electricity.

This kind of medium and low voltage line is made of 10m cement pole, and the cable height is more than 8m from the ground, and the design is national standard.

Question: How far is the rectification of the high-voltage line from the house, reasonable and harmless to the human body.

Answer 1: When the current high-voltage line is 1 thousand volts: it needs to be separated from the house by 4 meters. 2. When the high-voltage line is 1 10 thousand volts: it needs to be separated from the residence by 5 meters 110 thousand volts: it needs to be separated from the residence by 10 meters.

The voltage of the high-voltage line is between 220 thousand volts and 1000 thousand volts, the medium and high voltage transmission voltage is below 220 thousand volts, the ultra-high voltage transmission voltage is between 330 and 750 thousand volts, and the ultra-high voltage transmission voltage is above 1000 thousand volts.

How much is the voltage of the high-voltage line.

1. Transmission voltage.

High-voltage lines are divided into three grades, namely high-voltage transmission, ultra-high-voltage transmission, and ultra-high voltage transmission, of which the voltage of high-voltage transmission is below 220 thousand volts, the ultra-high voltage transmission voltage is located between 330 thousand volts and 750 thousand volts, and the ultra-high voltage transmission voltage is generally above 1000 thousand volts.

2. Wiring method.

The high-voltage line is divided into two ways, in the city, the underground transmission method is mostly adopted, the cable with the insulation layer is connected to the power station and housing from the underground, and the field will take the overhead line mode of the tower to transport, and a Nago tower is built at intervals.

3. Safe distance.

When installing high-voltage lines, the minimum distance between the line and the ground cavern should be judged according to the voltage, in which the height of the low-voltage line in the residential area can not be less than six meters, and the height of the non-residential area can not be less than five meters, and the height of the medium-voltage line through the residential area should not be less than meters, and the height through the non-residential area should not be less than the meter.

1. How many volts there are in the high-voltage wire, it depends on the place. The average city should be one or two hundred thousand volts. Within the city it may be tens of thousands to thousands of volts.

There may be hundreds of thousands of volts between provinces, and the highest is about one million volts. 2. According to the voltage safety level, it can be divided into: safety voltage

Usually below 36V, the national regulations below 42V; According to the national standard "GB3805-83" safety voltage, the voltage series used to prevent electric shock accidents and supplied by a specific power supply is specified. China stipulates the following five levels for power frequency safety voltage, namely 42V, 36V, 24V, 12V and 6V). Low pressure:

1000V or less, 220V and 380V are more typical; High voltage: AC 1000V and above voltage is collectively referred to, DC 800KV and below is called high voltage. The more typical ones are 10kv-220k; Ultra-high pressure:

330kv-750kv；5: UHV: 1000kV AC, 800kV DC or above; ）。

3. According to the difference between high and low voltage, it is based on the voltage value of electrical equipment to the ground. The voltage to the ground is higher than or equal to 1000V. The voltage to the ground is less than 1000V, which is low voltage.

That is, AC 1000V and above voltage is high-voltage voltage.

The so-called line voltage refers to the voltage between lines 380V, and the phase voltage is 220V between lines and zero.

Phase voltage: The voltage between the live wire and the neutral wire. The phase voltage in our country is 220 volts, 50 Hz.

Line voltage: The voltage between the live wires and the live wires. The line voltage in China is 380 volts, 50 Hz.

Phase voltage, the voltage between the three-phase transmission line (live wire) and the neutral wire is called phase voltage. For example, the voltage in the three-phase four-wire system in the daily electricity system is 380 220V, that is, the line voltage is 380V, and the phase voltage is 220V.

Line voltage, the voltage between each line (live wire) of the three-phase transmission line is called the line voltage, and the size of the line voltage is a multiple of the phase voltage.

Difference Between Line Voltage and Phase Voltage:

For phase voltage, it is generally understood as the voltage between phases, that is, 380V, and the line voltage is understood as 220V.

The phase voltage refers to the voltage between the phase wire, that is, the live wire and the neutral line, and the line voltage is the voltage of any two live wires on the line, that is to say, the phase voltage should be 220V, and the line voltage is 380V.

What comes out of the power plant are three live wires (line voltage). In the use of a transformer to boost the voltage to transport out, the point used is to use a step-down transformer to step down to 400V (still the voltage of the three live wires).

The neutral wire is drawn from the contacts of the three sets of coils of the winding of the step-down transformer, and the transformer is star-shaped, and the four wires here are aligned.

In the receiver through the electric cabinet respectively received the user (load). The three live wires are generally named A, B, C, and the neutral line is n. With a line voltage of 380V, it is connected to A, B, and C. Families are using an, bn, cn. Both 220V phase voltage.

Summary. Hello! The origin of the 220 volt voltage is:

220V 50Hz is the Chinese standard mains voltage, the user transformer produced in China is the output of 400 volts of line voltage, considering 5% of the line loss to the user is 380 volts, and the phase voltage is equal to the line voltage divided by the root number 3, that is, U phase = U line 3It is calculated to be 220 volts, and all single-phase and three-phase electrical appliances in the country are produced according to this standard, so they cannot be changed casually!

Good. Hello! The origin of the 220 volt voltage is:

220V 50Hz is the Chinese standard mains voltage, the user transformer produced in China is the output fiber of 400 volts of the line voltage, considering 5% of the line loss to the user is 380 volts, and the phase voltage is equal to the line voltage stupid car divided by the root number 3, that is, U phase = U line 3It is calculated to be 220 volts, and all single-phase and three-phase electrical appliances in the country are produced according to this standard, so they cannot be changed casually!

Dear, I'm glad to answer for you: How thick is the line of 220 volts 120w Answer: Dear, 220V, 120 watts of the current that is missing and rolling is, you can use the square lack of high wire.

According to the specifications of the wire, the smallest is the square millimeter. Use square millimeter wires will do. If it is 220 volts, then the current is 12kw 220=.

6 square or 10 square copper wire should be used, 10 square copper wire should be used for pipe penetration, and 6 square copper wire should be used for air laying, preferably 10 square meters. If the three-phase voltage is 380 volts, according to the estimation of 2A kW, the load current of 12kW is about 24A. The use of 4 square copper wire can meet the use conditions.