The nominal voltage of the system is 6KV so what is the maximum voltage of the system 5

The maximum voltage of the equipment refers to the voltage (dielectric strength) that the equipment can withstand, and the nominal voltage of the system refers to the voltage level of the system in which the equipment is located.

The maximum voltage of the device should be greater than the nominal voltage of the system.

The nominal voltage is a specified value, in order to ensure that the power supply department provides a reasonable voltage to the user's electrical equipment, so as to determine this value, it takes into account various factors of power supply. In practice, the voltage varies within a specified range above and below the nominal voltage.

In the system below 220kV, the rated voltage of the equipment.

Generally, it is the nominal voltage of the system.

The rated voltage of the electrical equipment is equal to the nominal voltage of the power grid, which means that under the voltage, the equipment can operate stably for a long time, the rated voltage of the power generation equipment is 5% larger than the nominal voltage of the system, and the rated voltage of the primary side and the secondary side of the transformer is different, and it is related to whether it is connected to the generator and the distance from the user, which is generally 5% or 10% greater than the rated voltage of the system

In the normal system of Series I, the difference between the maximum voltage and the minimum voltage and the nominal voltage of the system is not more than plus or minus 10%; In a Series II normal system, the difference between the maximum voltage and the nominal voltage of the system is not greater than about 5%, and the difference between the minimum voltage and the nominal voltage of the system is not more than -10%. i.e. if in Series I, it should be.

If it is a solitary grid operation depends on the maximum voltage tolerance of the generator, generally.

6000V*, the grid voltage generally allows the voltage to fluctuate at 10% of the rated voltage

Maximum operating voltage: refers to the upper limit of the actual operating control voltage.

Nominal voltage: refers to the rated voltage.

Maximum voltage of the device: Without this term, it may refer to the highest voltage that is likely to occur.

Maximum operating voltage of the system: There is no such statement, it may be the same as the maximum operating voltage.

Maximum operating phase voltage: The main concept here is "phase voltage", which refers to the single-phase voltage, that is, the voltage between the phase line and the neutral point. In some abnormal cases, the phase voltage may be close to equal to the line voltage.

Average Voltage: The average value of the voltage.

The principal unit of voltage in the SI unit system is volts (v), abbreviated as volts, which is represented by the symbol v. 1 volt is equal to 1 joule of work done for every 1 coulomb of charge, i.e. 1v = 1j c. Strong voltages are often measured in kilovolts (kv), and weak voltages can be measured in millivolts (mv) and microvolts (v).

The conversion relationship between them is:

1kv=1000v。

1v=1000mv。

1mv=1000μv。

The nominal voltage is a common standard grade, the reference voltage is a multiple of the nominal voltage, the maximum voltage of the equipment is a multiple of the nominal voltage, and the rated voltage is the voltage indicated by the equipment factory.

There are three current voltage level sequences in China, one is the highest voltage (the second is the average voltage), and the third is the rated voltage).

The rated voltage refers to the rated voltage of the electrical equipment, considering the line voltage offset, the secondary side of the step-up transformer is 10% higher, and the middle and low-voltage side of the power-down transformer is 5% higher. Therefore, the working voltage of the insulator of the same voltage level is also different on the power generation side, the step-down transformer secondary side, and the user side.

The maximum operating voltage refers to the highest line voltage when the system is running, that is, the maximum working voltage of the system; The nominal voltage generally refers to the rated line voltage of the system, which is actually the average voltage of the system; The maximum voltage of the equipment refers to the maximum operating voltage of the system from the perspective of normal use of the equipment. The highest operating phase voltage is the maximum operating voltage divided by 3.

When the power is transmitted through the line, the voltage distribution along the line is generally higher than the end. The allowable voltage offset of general electrical equipment is 5%, and the voltage drop along the line is generally 10%, so the rated voltage of the generator at the beginning of the line is 105% of the rated voltage of the line, and the maximum piezoelectric of the equipment is 110% of the rated voltage of the line.

Answer]: B, D

According to Table 3 and Table 4 of Article 1 of the Standard Voltage (GB T 156-2007), the maximum voltage of the equipment in the 35kV system is; The maximum voltage of the equipment in the 66kV system is; The maximum voltage of the equipment in a 110kV system is 126kV; In a 220kV system, the maximum standby free voltage of the equipment is 252kV.

System nominal voltage, the upper limit of the output voltage of the system power supply. The nominal voltage usually refers to the open-circuit output voltage, that is, the voltage value that does not connect any load and has no current output. In information technology systems, this parameter indicates the type of protector that should be used, and it indicates the effective value of the AC voltage.

Consistent with the rated voltage of the system being protected; In information technology systems, this parameter indicates the type of protector that should be used, and it indicates the effective value of the AC voltage.

The nominal voltage usually refers to the open-circuit output voltage, that is, the voltage value that does not connect any load and has no current output. Therefore, it can also be considered that this is the upper limit of the output voltage of this power supply.

In actual use, when RR lj, it must be operated below the maximum working voltage to avoid burnout or inter-pole breakdown and arcing.

The maximum operating voltage of a resistor cannot be determined only from the thermal state of the resistor, but also from factors such as the electrical strength of the resistor itself and the air pressure of the working environment. It is usually determined by testing. For example, a 1MW synthetic carbon film resistor must apply a voltage of 1400V to achieve a rated power of 2W if only the heat generation limit is considered, but the maximum operating voltage specified in the technical conditions is 500V, which is why the resistor takes into account the problem of electrical strength.

The maximum operating voltage of various electrical components and electrical equipment is different, and it is generally noted in the equipment nameplate or component description. The calculation of the maximum operating voltage should be taken into account as a whole.

The nominal voltage of the system is the most suitable voltage for the system to work at this voltage, and the maximum working voltage is the limit voltage value that is not allowed to be exceeded, in fact, the system is generally not allowed to work at the highest working voltage, because it is easy to damage the equipment.

The nominal voltage is the standard voltage used, which means that the system works best at this voltage. The highest voltage that a system can handle. System components that exceed the maximum voltage may burn out.

The nominal voltage of the system is used to identify the voltage level of the system, or to identify the different levels of the system.

The maximum voltage of the system is the highest operating voltage at any point when the system is operating normally.

First of all, both of these voltage values occur during normal operation of the system, not during a fault condition. The maximum voltage value is approximately equal to the rated voltage value of the multiple. Different voltage levels have different multiples, see GB156 for details, which has the correspondence between the nominal value and the maximum value under each voltage level.

Dear, I am glad to answer for you: the nominal voltage of a 10kV system is several times the phase voltage. A:

Pro, the phase voltage of the root number is 3 times that of the 10kV line. If the line voltage is, then it is caused by the long transmission distance or the small cross-section of the transmission line, resulting in a large line voltage drop and large line loss, or the output capacity of the power department is not enough, there are too many users on the same line, and the transmission power is not enough due to the use of electricity at the same time.