(Conversation between an electrical engineer and an electrician电气工程师与电工对话）
1 Engineer: How many kinds of electrical voltages do you use on the well site?
Electrician: Three, all together.
电气工程师：井场常用电压有几种？
电工：3种。
2 Engineer: What are they?
Electrician: 110 volts, 220 volts and 380 volts.
电气工程师：有哪3种？
电工： 110伏、220伏和380伏。
3 Engineer: What equipment are they used for respectively?
Electrician: 110-volt is used for imported electrical equipment.
电气工程师：这3种电压分别用于什么设备？
电工：110伏用于进口电器设备；
4 Engineer: How about 220-volt?
Electrician: It is used for office equipment and China-made lighting equipment.
电气工程师：220伏呢？
电工：220伏用于办公设备、国产照明设备；
5 Engineer: And how about 380-volt?
Electrician: The 380-volt is used for the China-made circulation system.
电气工程师：380伏呢？
电工：380伏用于国产循环系统。
6 Engineer: How is the 110v electricity generated?
Electrician: It is provided by the SCR.
电气工程师：110伏电源是怎么产生的？
电工： 110伏电源通过可控硅SCR提供。
7 Engineer: What advantages does it have?
Electrician: It can give electrical motors stepless speed change.
电气工程师：有什么优越性？
电工： 可使电动马达产生无级变速。
8 Engineer: What effect does stepless speed change have on production?
Electrician: It is more convenient and flexible to operate, and meets various requirements in different working conditions.
电气工程师：这对生产有什么影响？
电工：它使日常操作灵活方便，可满足各种工况下的作业要求。
9 Engineer: What are the safety requirements for the electric circuit?
Electrician: The cable specifications must meet API standards.
电气工程师：对电路的安全要求是什么？
电工：电缆的规格必须符合电气工程师PI标准。
10 Engineer: What are the requirements for the lighting system and electrical motors?
Electrician: All the electrical equipments must be explosion proof. 电气工程师：对照明系统及电动马达有什么要求？
电工：所有电器设施必须防爆。
