ABB PM891K01 3BSE053241R1 有关交流配电和系统的详细信息
阅读、理解和注意所有指示至关重要，
本说明书中的警告和注意事项
以及设备本身。只有合格人员才能
允许安装、操作、维护和修理
设备
请勿拆卸或安装印刷电路板、模块或
包含它们的组件，除非中另有说明
这个指令，加上电源。这可能会损坏
设备拆卸或时，断开所有交流线路的电源
连接交流电线，防止人员受伤和设备损坏。为防止设备损坏，移除直流电
当移除或连接直流电线时，为所有直流电线供电，
电路板或连接到它们的模块或组件。
本节讨论的是
MPSIII系统。对于完成这些任务的过程，
请参阅本文末尾的安装顺序流程图
有关正确程序的路径的部分。
有关交流配电和系统的详细信息
接地，参考：
•现场规划。
•供电和接地的推荐规程
敏感电子设备（IEEE Emerald Book），
ANSI/IEEE 1100标准。
•工业和
商业电力系统（IEEE绿皮书），
ANSI/IEEE 142。
不要试图安装任何系统或相关设备
在查阅和理解这些文件之前
与任何其他适用的国际标准一样。
本说明书不讨论接地系统的细节。良好的接地做法可防止问题并减少
系统停机。完整且正确接地的电气设备
该系统对于人员安全、设备保护、，
以及正常的过程系统操作。数字过程控制
系统需要一个单点接地系统，该系统有两个
路径：交流接地的一条路径（安全
接地）和直流接地（系统
常见）。
有关系统接地的详细信息，请参阅现场
规划说明。
It is critical to read, understand, and heed all instructions,
warnings, and cautions located throughout this instruction
and on the equipment itself. Only qualified personnel must be
allowed to install, operate, maintain, and repair this
equipment.
Do not remove or install printed circuit boards, or modules or
components containing them, unless otherwise indicated in
this instruction, with power applied. This could damage the
equipment. Remove power to all AC wiring when removing or
connecting AC wires to prevent injury to personnel and equipment damage. To prevent equipment damage, remove DC
power to all DC wiring when removing or connecting DC wires,
circuit boards, or modules or components connected to them.
This section discusses AC power wiring and grounding for the
MPSIII system. For the procedures to accomplish these tasks,
refer to the installation sequence flowcharts at the end of this
section for the path to the proper procedure.
For detailed information on AC power distribution and system
grounding, refer to:
• Site Planning.
• Recommended Practice for Powering and Grounding
Sensitive Electronic Equipment (IEEE Emerald Book),
ANSI/IEEE 1100.
• Recommended Practice for Grounding of Industrial and
Commercial Power Systems (IEEE Green Book),
ANSI/IEEE 142.
Do not attempt to install any system or related equipment
before consulting and understanding these documents as well
as any other applicable international standards.
This instruction does not discuss the details of grounding systems. Good grounding practices prevent problems and reduce
system downtime. A complete and properly grounded electrical
system is vital for personnel safety, equipment protections,
and normal process system operation. Digital process control
systems require a single-point grounding system that has two
paths: one path for an alternating current ground (safety
ground) and one path for a direct current ground (system
common).
For detailed information on system grounding, refer to the Site
Planning instruction.
