在电气工程中，电力电缆、电缆桥架及母线槽的接地是确保电气和系统正常运行的重要环节。这些接地要求对于从事电气工作的人员来说是必须要了解和掌握的。

　　In electrical engineering, grounding of power cables, cable trays, and bus ducts is an important link to ensure electrical safety and normal system operation. These grounding requirements must be understood and mastered by personnel engaged in electrical work.

　　，电力电缆的接地要求关重要。电缆的接地可以有效地防止电击事故的发生，保障人员的。同时，良好的接地还可以减少电磁干扰，提高电气系统的稳定性。在接地时，应确保电缆的金属护套或接地线与接地系统可靠连接，接地电阻应符合相关标准。

　　Firstly, the grounding requirements for power cables are crucial. The grounding of cables can effectively prevent electric shock accidents and ensure the safety of personnel. Meanwhile, good grounding can also reduce electromagnetic interference and improve the stability of electrical systems. When grounding, it should be ensured that the metal sheath or grounding wire of the cable is reliably connected to the grounding system, and the grounding resistance should comply with relevant standards.

　　电缆桥架的接地也不容忽视。桥架作为电缆的支撑结构，同样需要进行有效接地。接地不仅可以保证桥架自身的，还可以防止故障电流通过桥架传播，保护周围设备和人员的。此外，桥架的接地应与整个电气系统的接地网相连接，形成一个完整的接地体系。

　　The grounding of cable trays cannot be ignored. As a supporting structure for cables, cable trays also require effective grounding. Grounding not only ensures the safety of the bridge itself, but also prevents fault currents from propagating through the bridge, protecting the safety of surrounding equipment and personnel. In addition, the grounding of the bridge should be connected to the grounding grid of the entire electrical system to form a complete grounding system.

　　母线槽的接地要求与电缆和桥架类似。母线槽是电力传输的重要组成部分，其接地质量直接影响到系统的可靠性。母线槽的接地应确保母线槽本体与接地系统之间的良好连接，以降低接地电阻，提高接地效果。

　　The grounding requirements for bus ducts are similar to those for cables and cable trays. Bus duct is an important component of power transmission, and its grounding quality directly affects the reliability of the system. The grounding of the bus duct should ensure a good connection between the bus duct body and the grounding system to reduce grounding resistance and improve grounding effectiveness.

　　对于干电气的人员来说，了解和遵守这些接地要求是关重要的。在进行电气设计、安装和维护工作时，必须严格按照相关标准和规范进行操作，确保接地系统的完整性和有效性。同时，还需要定期对接地系统进行检测和维护，及时发现和解决可能存在的问题。下面本文就给大家分享电力电缆、电缆桥架及母线槽具体的接地要求。

　　It is crucial for electrical personnel to understand and comply with these grounding requirements. When carrying out electrical design, installation, and maintenance work, it is necessary to strictly follow relevant standards and specifications to ensure the integrity and effectiveness of the grounding system. At the same time, it is necessary to regularly inspect and maintain the grounding system to promptly identify and resolve any potential issues. Below, this article will share with you the specific grounding requirements for power cables, cable trays, and bus ducts.

　　电力电缆的接地：

　　Grounding of power cables:

　　1、110kV及以上中性点有效接地系统单芯电缆的终端金属护层，应通过接地刀闸直接与变电站接地装置连接。

　　1. The terminal metal protective layer of single core cables with a neutral point effective grounding system of 110kV and above should be directly connected to the substation grounding device through a grounding knife switch.

　　2、在110kV及以上电缆与架空线转弯处的终端站内，电缆终端头的金属护层宜通过接地刀闸单独接地，设计无要求时接地电阻不应大于4Ω。电缆护层的单独接地极与架空避雷线接地极之间应保持3~5m距离。

　　2. At the terminal station where cables of 110kV and above turn with overhead lines, the metal protective layer of the cable terminal should be separately grounded through a grounding knife switch. If there are no design requirements, the grounding resistance should not exceed 4 Ω. The separate grounding electrode of the cable sheath should maintain a distance of 3-5m from the grounding electrode of the overhead lightning protection line.

　　3、当接地装置难以分开时，安装在架空杆塔上的110kV及以上电缆终端头金属护层，通过接地刀闸后和架空避雷线合一接地体，设计无要求时接地电阻不应大于4Ω。

　　3. When the grounding device is difficult to separate, the metal protective layer of the 110kV and above cable terminal installed on the overhead tower should be connected to the grounding body of the overhead lightning protection line after passing through the grounding knife switch. If there is no requirement in the design, the grounding resistance should not exceed 4 Ω.

　　4、110以下三芯电缆的终端金属护层应直接与变电站接地装置连接。

　　4. The terminal metal protective layer of three core cables below 110 should be directly connected to the substation grounding device.

　　5、电力电缆接头盒或中间接线盒外壳的接地螺栓，均必须与接地干线相连。电缆盒内电缆的金属包皮和钢铠甲，应用等效于金属外皮截面的铜导线，连接到接线盒的外壳接地螺栓上。

　　5. The grounding bolts of the enclosure of the power cable junction box or intermediate junction box must be connected to the grounding main line. The metal sheath and steel armor of the cables inside the cable box should be connected to the grounding bolt of the junction box's outer shell using copper wires with a cross-section equivalent to the metal sheath.

　　6、当电缆穿过零序电流互感器时，电缆头的接地线应通过零序电流互感器后接地；由电缆头穿过零序电流互感器的一段电缆金属护层和接地线应对地绝缘。

　　6. When the cable passes through the zero sequence current transformer, the grounding wire of the cable head should be grounded after passing through the zero sequence current transformer; The metal protective layer and grounding wire of the cable from the cable head to the section passing through the zero sequence current transformer should be insulated from the ground.

　　7、当电缆保护管可触及时必须接地，方法是与接地干线焊成一体，或者在保护管上焊一支接地螺栓后，用导线与接地干线相连。在一般触及不到的地方，例如高于3.5m的电缆过桥保护管，或穿越道路时埋在地中的保护管，可不接地。在电气工程中，电力电缆、电缆桥架及母线槽的接地是确保电气和系统正常运行的重要环节。这些接地要求对于从事电气工作的人员来说是必须要了解和掌握的。

　　7. When the cable protection tube is accessible, it must be grounded by welding it together with the grounding main line, or by welding a grounding bolt on the protection tube and connecting it to the grounding main line with a wire. In areas that are generally inaccessible, such as cable bridge protection pipes higher than 3.5m, or protection pipes buried in the ground when crossing roads, they may not be grounded. In electrical engineering, grounding of power cables, cable trays, and bus ducts is an important link to ensure electrical safety and normal system operation. These grounding requirements must be understood and mastered by personnel engaged in electrical work.

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