Finally, the principle and arrangement of SPDs on equipments signal side was briefly introduced.
最后，简要介绍信号电涌保护器的原理和配置。
For SPDs, with a protective level different from that provided at the origin, as in the IEC standards, then coordination is mandatory.
对于SPD，由于保护水平不同于在入口处提供的保护水平，正如iec的标准，那么协调配合就是强制性的。
The main topics covered here are the essential functions, system structure, the principles for selecting safety monitoring parameters, and the method for SPDS display screens design.
着重讨论了系统的基本功能、系统的结构、安全监测参数的分析选择及SPDS的显示画面设计等设计技术问题。
If SPDs are to be installed at more than one location in a building, what issues must be considered in coordinating the SPDs at building entrance and others connected to the same line?
如果在一幢大厦里不只一处安装SPD，大厦入口处的SPD和其他连接在同一条线上的SPD进行协调配合时，必须考虑什么因素？
This paper introduced the structural design and working mechanism of SPDS-120 and SPDS - 114 releasing tools, especially the structure, characteristics and relevant design calculation of SPDS - 114.
介绍了SPDS- 120和SPDS - 114两种型号丢手工具的结构设计、工作原理，重点介绍了SPDS - 114型丢手工具的结构、特点及相关设计计算。
This paper introduced the structural design and working mechanism of SPDS-120 and SPDS - 114 releasing tools, especially the structure, characteristics and relevant design calculation of SPDS - 114.
介绍了SPDS- 120和SPDS - 114两种型号丢手工具的结构设计、工作原理，重点介绍了SPDS - 114型丢手工具的结构、特点及相关设计计算。
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