When wiring low voltage switchgear equipment, standard operation is not only related to whether the equipment can operate normally, but also closely related to electricity safety. From preliminary preparation to final inspection, each link needs to strictly follow the relevant standards and requirements. The following is a detailed analysis of the key points of wiring specifications from multiple dimensions.
The preparation work before wiring is the basis for ensuring smooth wiring. First of all, you need to be fully familiar with the electrical schematics and wiring diagrams of the equipment, and understand the functions and connection relationships of each component, which will help avoid wrong connections and missed connections during the wiring process. At the same time, prepare appropriate tools, such as wire strippers, wire crimping pliers, multimeters, etc., to ensure the integrity and accuracy of the tools and prevent tool problems from affecting the wiring quality. For the wires and cables to be connected, check whether their specifications and models are consistent with the design requirements, confirm that the insulation layer of the cable is not damaged or aged, and ensure that the conductivity and insulation performance of the cable are good.
When wiring, the connection method and process of the wires and terminals are crucial. Before connection, the wires need to be stripped appropriately according to the type and specification of the terminals. The stripping length should be moderate. Too short may cause poor contact, and too long may easily cause short circuit risks. After inserting the wire into the terminal, use a crimping pliers to crimp it to ensure that the connection is firm and reliable, and avoid looseness or virtual connection. For some important connection points, such as the connection of the main circuit, welding can be used to enhance the stability of the connection, but attention should be paid to controlling the welding time and temperature to prevent damage to the insulation layer of the wire.
Reasonable wiring layout can not only improve the aesthetics of low voltage switchgear equipment, but also ensure the safety and reliability of its operation. When wiring, the principle of horizontal and vertical should be followed, the wires should be arranged neatly, and fixed with cable ties or wire clamps to avoid the wires from entanglement and crossing with each other, and reduce the generation of electromagnetic interference. Wires with different functions, such as power lines, control lines, signal lines, etc., should be laid in categories and maintained at a certain distance to prevent signal interference. For parts that are prone to mechanical damage, such as the equipment inlet and outlet, protective measures should be taken, such as installing wire covers to protect the wires from wear.
Grounding is a key link in ensuring safety in the wiring of low voltage switchgear equipment. Good grounding can quickly conduct current to the ground when a leakage fault occurs in the equipment, avoiding accidents of electric shock. Grounding methods are generally divided into protective grounding and working grounding. Regardless of which method is used, the grounding resistance must meet the requirements of relevant standards. During the wiring process, ensure that the grounding wire is firmly connected and in good contact to avoid loosening or rust. At the same time, the specifications of the grounding wire should be reasonably selected according to the capacity and working current of the equipment to ensure sufficient current carrying capacity.
After the wiring is completed, a comprehensive and detailed inspection must be carried out. First, check from the appearance whether the connection of the wire is firm, whether the terminal is tightened, and whether there is exposed conductor. Then, use a multimeter to test the circuit for continuity, check whether each circuit is unobstructed, and whether there is a short circuit or open circuit. For some complex circuits, insulation resistance testing is also required. Use an insulation resistance meter to measure the insulation resistance between wires and wires, and between wires and equipment casings to ensure good insulation performance and prevent leakage accidents.
During the operation of low voltage switchgear equipment, the maintenance of the wiring parts should not be ignored. Due to vibration and heat generation during the operation of the equipment, the wiring terminals may become loose and the wires may age. Therefore, it is necessary to inspect the equipment regularly to check whether there is abnormal heating, discoloration, and odor at the wiring parts. After discovering the problem, timely processing is required, such as re-tightening the terminals and replacing aging wires to ensure that the equipment is always in a safe and reliable operating state.
In addition, with the continuous development of electrical technology and changes in application scenarios, the wiring specifications of low voltage switchgear equipment are also continuously updated and improved. As an operator, you should pay attention to changes in industry standards and specifications in a timely manner, constantly learn new wiring techniques and processes, and improve your professional skills. In actual work, strictly abide by relevant specifications and requirements, take every wiring link seriously, and ensure the safe and stable operation of low voltage switchgear equipment.
