美国怀俄明论文代写:电气装置

Keywords:美国怀俄明论文代写:电气装置

供电规则407.1要求，对于每个电气装置，消费者必须提供其自己的接地电极系统，通过该系统，其设备的暴露的导电部分被接地。也就是说，设备的所有暴露的导电部件应通过保护导体连接到设备的主接地端子，并且该端子应通过接地导体连接到接地电极。这意味着每个安装都连​​接成TT系统的一部分。细则407.3.f. （iii）进一步规定，如果直接从公司的变压器或通过地下电缆供电，公司可允许消费者在其主接地端子和公司的变压器接地端子或服务电缆的金属护套之间提供接合导线。因此，安装将作为TN-S系统的一部分进行操作。但是，该规则还规定，在测量接地故障回路阻抗或测试保护装置的操作时，必须断开所述接合导体，即设备的设计和调试必须采用TT系统。
美国怀俄明论文代写:电气装置
Supply Rule 407.1 requires that for every electrical installation the consumer must provide his own earth electrode system by which the exposed conductive parts of his installation are connected to earth. That is, all exposed conductive parts of the installation shall be connected by protective conductors to the main earthing terminal of the installation and that terminal shall be connected to earth electrode(s) via an earthing conductor. This means that every installation is connected to be part of a TT system. Rule 407.3.f. (iii) further states that where the supply is taken direct from the Company's transformer or via underground cable, the Company may allow the consumer to provide a bonding conductor between his main earthing terminal and the Company's transformer earth or metallic sheaths of the service cable. Therefore, the installation will be operated as part of a TN-S system. However, this rule also states that in the measurement of the earth fault loop impedance or testing the operation of protective devices, the said bonding conductor must be disconnected, i.e. the design and commissioning of the installation must assume a TT system.