槽式电缆桥架可用于全封闭电缆敷设吗？
电缆桥架是由桥架或梯子的直线段、弯曲通道、构件与支撑臂(臂式托架)、吊架等组成的具有密集支撑索的刚性结构体系的全称。槽型电缆桥架是由全钢板弯曲成槽型的部件，其概念和槽型电缆桥架之间的区别是高度不同，宽度比不同，槽型电缆桥架又浅又宽，槽型电缆桥架有一定的深度和闭合度。
Cable bridge is the full name of the rigid structure system with dense supporting cables, which is composed of the straight section, bending channel, member, supporting arm (arm bracket), hanger, etc. of the bridge or ladder. Trough type cable tray is a kind of component bent from all steel plates into trough type. The difference between its concept and trough type cable tray is that the height is different, the width ratio is different, the trough type cable tray is shallow and wide, and the trough type cable tray has a certain depth and closure.
槽式电缆桥架可用于全封闭电缆敷设。更适用于高敏感系统的计算机电缆、通信电缆、热电偶电缆等控制电缆的敷设。对控制电缆的屏蔽干扰和电缆在重腐蚀环境中的保护效果良好。
Trough type cable tray can be used for fully enclosed cable laying. It is most suitable for laying computer cables, communication cables, thermocouple cables and other control cables in highly sensitive systems. The shielding interference of the control cable and the protection effect of the cable in the heavy corrosion environment are good.
通道式电缆桥架接地点:
Channel type cable tray grounding point:
1. 电桥系统应具有可靠的电气连接和接地(仅适用于金属电桥)。
1. The bridge system shall have reliable electrical connection and grounding (only applicable to metal bridge).
2. 当允许桥接系统构成接地主电路时，应满足下列要求。电桥两端连接电阻不大于0.00033欧姆，并绝缘涂层的接地孔。在中性点1KV及以下的直接接地系统中，接收设备的接地与系统的中性点接地连接。电源站安装动态切断时，桥步长方向的金属截面积不得小于规定值。
2. When the bridge system is allowed to form the ground main circuit, the following requirements shall be met. The connection resistance at both ends of the bridge shall not be greater than 0.00033 ohm, and the grounding hole of the insulating coating shall be removed. In the direct grounding system with the neutral point of 1kV and below, the grounding of the receiving equipment is connected with the neutral point of the system. When the power station is installed with dynamic cut-off, the metal cross-sectional area in the direction of bridge step length shall not be less than the specified value.
3.当接地线沿桥架全跨敷设时，各区段(包括非直线区段)应少与接地线有一个可靠的连接点。
3. When the grounding wire is laid along the whole span of the bridge, each section (including non-linear section) shall have at least one reliable connection point with the grounding wire.
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