1、什么叫额定电压？
1. What is rated voltage?
设备所标的并与电力系统某些有关运行特性的相间电压的有效值。
The effective value of phase-to-phase voltage marked by the equipment and related to some operating characteristics of the power system.
2、什么叫相间额定工作电压？
2. What is the rated working voltage between phases?
在规定条件下，保证电器正常工作的电压值。
The voltage value to ensure the normal operation of electrical appliances under specified conditions.
3、什么叫额定绝缘电压？
3. What is the rated insulation voltage?
电气成套厂家提醒，在规定条件下，用来度量电器及其部件的不同电位部分的绝缘强度、电器间隙和爬电距离的名义电压值，除非另有规定，此值为电器的大额定工作电压。
The manufacturer of complete sets of electrical equipment reminds that under specified conditions, the nominal voltage value used to measure the insulation strength, electrical clearance and creepage distance of different potential parts of the electrical equipment and its components is the large rated working voltage of the electrical equipment unless otherwise specified.
4、什么叫额定电
4. What is rated power
开关设备在规定条件下，可以长期通过的工作电流值。
The working current value that the switchgear can pass for a long time under specified conditions.
5、什么叫额定工作电流？
5. What is the rated working current?
在规定条件下，保证电器正常工作的电流值。
The current value to ensure the normal operation of electrical appliances under specified conditions.
6、什么是直流电？
6. What is DC?
直流电指电流方向一定，且大小不变的电流，如干电池。
Direct current refers to the current with certain direction and constant size, such as dry battery.
7、什么叫交流电？
7. What is AC?
是指方向、大小随时间变化的电流。
It refers to the current whose direction and size change with time.
8、什么叫电流？
8. What is current?
物体内的电子在电场的作用下，有规则地向一个方向移动，就形成了电流。电流“I”表示。电流强度在数值上等于1秒钟内通过导线截面的电量的大小，通常用安培“A”表示，A、KA、mA、uA是不同单位的表示方法。
Under the action of electric field, the electrons in an object move in one direction regularly, forming a current. Current "I" indicates. The current intensity is numerically equal to the amount of electricity passing through the wire section in one second, usually expressed in ampere "A", A, KA, mA and uA are different units.
9、什么叫电压？
9. What is voltage?
水要有水位才流动，与此相似，要使电荷作用有规则的移动，必须在电路两端有一个电位差，这就称为电压，用符号“U”表示，数值通常用伏特“V”表示，有V、KV、mV、uV等几个单位表示。
Water flows only when it has water level. Similarly, in order to make the action of electric charge move regularly, there must be a potential difference at both ends of the circuit, which is called voltage, which is expressed by the symbol "U". The value is usually expressed by the volt "V", which includes V, KV, mV, uV and other units.
一个电源（发电机、电池）能够使电流持续不断沿着电路流动，就是因为它能使电路两端产生和维持电位差的能力就叫电源的电动势，用“E”表示；单位“V”，关系电流的大小，与电阻两端的电压高低成正比，与电阻的大小成反比。
A power supply (generator, battery) can make the current flow continuously along the circuit, because it can make the potential difference between the two ends of the circuit generate and maintain, which is called the electromotive force of the power supply, expressed by "E"; The unit "V" is related to the size of the current, which is proportional to the voltage at both ends of the resistance and inversely proportional to the size of the resistance.
10、什么是欧姆定律？
10. What is Ohm's Law?
R＝U/I式中：U：电压，R：电阻，I：电流，即回路中的电压与电流的比值。
R=U/I, where U: voltage, R: resistance, I: current, that is, the ratio of voltage and current in the circuit.
We have explained the basic contents of the electrical package from the above ten aspects. I hope we can help you. For more information, please come to our website //www.aqfitlab.com Ask about it!
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