ABB INNIS21网络接口模块
ABB INNIS21网络接口模块中文资料：
ABB INNIS21网络接口模块浮动中性点（IT）系统的特殊安装说明当以下列出的交流输入电源安装在中性线未参考保护接地的系统中时，必须遵循这些特殊安装说明，以防止损坏电源。IC693PWR321S（或更高版本）IC693PWR 330A（或更低版本）浮动中性点系统的定义浮动中性点是一种配电布线系统，其中中性点和保护接地不通过可忽略的阻抗连接在一起。ABB INNIS21在欧洲，这被称为IT系统（见IEC950）。在浮动中性点系统中，从输入端子到保护接地测量的电压可能超过本手册第24章电源规范中规定的264伏交流最大输入电压ABB INNIS21
英文资料
Special Installation Instructions for Floating Neutral (IT) Systems When the AC input power supplies listed below are installed in a system where the Neutral line is not referenced to Protective Earth Ground, these special installation instructions must be followed to prevent damage to the power supply. IC693PWR321S (or later version) IC693PWR330A (or later version) Definition of Floating Neutral Systems A Floating Neutral System is a system of power distribution wiring where Neutral and Protective Earth Ground are not tied together by a negligible impedance. In Europe this is referred to as an IT system (see IEC950). In a Floating Neutral System, voltages measured from input terminals to protective earth ground may exceed the 264 Volts AC maximum input voltage specified in the power supply specifications in Chapter 24in this manualABB INNIS21
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