Customize GGD switchgear
The secondary circuits in the PT cabinet[/caption]
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The customization of GGD switchgear (low-voltage complete switchgear) usually involves the following important aspects and steps:
### Communication of Requirements and Scheme Design
1. **In-depth Communication with Customers**
Conducting thorough and detailed communication with customers is the first and foremost step. It is necessary to understand the industry where the customer is located, the specific usage locations (such as industrial plants, commercial buildings, or residential communities, etc.), the types of loads expected to be controlled (such as motors, lighting systems, various electrical equipment, etc.), as well as special requirements regarding the equipment's protection level and operational convenience. For example, when used in chemical enterprises, a relatively high anti-corrosion and explosion-proof protection level may be required; if it is used in the distribution room of residential buildings, more emphasis may be placed on the simplicity and safety of operation.
2. **Design of Customization Schemes**
Based on the information obtained through communication, arrange a professional team of electrical engineers to design the customization scheme. The scheme covers key contents such as cabinet structure, electrical principles, and component selection. In terms of cabinet structure, the size and specifications should be determined according to the installation space, and considerations should be given to whether it is necessary to use cabinets in parallel, etc.; the design of electrical principles needs to ensure that various control, protection, and monitoring functions required by the customer can be accurately achieved; in terms of component selection, it is necessary to combine the characteristics and operation requirements of the load to select appropriate electrical components such as circuit breakers, contactors, relays, etc., to ensure the reliable and stable performance of the equipment.
### Cabinet Manufacturing
1. **Selection of Cabinet Materials**
GGD cabinets are usually made of high-quality cold-rolled steel plates. However, different choices will be made according to different usage environments. If it is in a relatively humid and corrosive environment, steel plates that have undergone special anti-corrosion treatment can be selected, or high-quality plastic spraying or painting treatments can be carried out on the surface of the cabinet to enhance its corrosion resistance; if it is in indoor and outdoor environments with certain requirements for dust prevention and waterproofing, attention will be paid to the sealing performance of the cabinet, and steel plates with appropriate thickness and reasonable structure will be selected to ensure the protection effect.
2. **Processing and Assembly of Cabinets**
Use advanced sheet metal processing equipment to perform operations such as cutting, bending, and punching on steel plates, strictly control the processing accuracy, ensure that the dimensions of each part of the cabinet are accurate, and the assembly fit is high. Through welding, bolt connection and other processes, firmly assemble the cabinet frame, side panels, door panels and other components together to ensure the overall strength and stability of the cabinet, while also ensuring that the cabinet doors open and close smoothly and are convenient for daily operation and maintenance.
### Selection and Procurement of Electrical Components
1. **Precise Selection**
Select electrical components according to the design scheme and the actual requirements of the load. For example, for the circuit breaker in the main circuit, appropriate specifications of products should be selected based on parameters such as the rated current and short-circuit breaking capacity calculated, to ensure that the current can be reliably cut off when a fault occurs, protecting the safety of lines and equipment; the model of the contactor should be determined according to the power and working voltage of the controlled load to ensure that it can stably control the start, stop, and operation state switching of the load; for the relay, factors such as the accuracy of its action, response speed, and contact capacity should be considered to meet the requirements of control and protection logic.
2. **Quality-controlled Procurement**
Purchase electrical components from formal and reliable suppliers, and give priority to selecting well-known brands and products with guaranteed quality. During the procurement process, conduct strict incoming inspections on each batch of components, check whether there is any damage or deformation on the appearance, verify whether the component parameters match the selection requirements, and conduct sampling performance tests when necessary to ensure that all the components put into use are qualified, laying a solid foundation for the reliable operation of the equipment.
### Installation and Wiring of Electrical Components
1. **Reasonable Layout**
Plan the layout of components inside the cabinet according to the principles of electrical principles and operational convenience. Usually, large components in the main circuit (such as incoming circuit breakers, etc.) are installed in positions that are convenient for incoming lines and operation; components that are closely related in the control circuit (such as buttons, indicator lights for controlling the same equipment, and the corresponding control relays, etc.) are placed together to reduce the length and complexity of wiring, and improve the overall electrical performance and maintainability.
2. **Standard Installation and Wiring**
Adopt appropriate installation methods to fix electrical components. For example, use guide rails to install small control components, and use bolts to fix high-power main circuit components, etc., to ensure that the components are installed firmly and will not become loose or displaced due to factors such as vibration during the operation of the equipment. When wiring, strictly follow the electrical schematic diagram, distinguish lines with different functions and different voltage levels, use wires of different colors (such as the green-yellow double-color wire for the grounding protection wire, etc.) for easy identification and maintenance, and at the same time, mark the wires clearly, clearly indicating their starting points, end points, and uses, etc. The wires should be laid orderly along wire ducts and cable trays to ensure that the wiring is neat, beautiful, and the connections are reliable, preventing potential hazards such as loose connections and short circuits.
### Debugging and Testing
1. **Function Debugging**
After completing the assembly of the cabinet and wiring, first conduct a visual inspection to check whether there are obvious problems such as askew installation of components or exposed wires. Then turn on the power and debug each function of the equipment one by one according to the designed control logic. For example, verify whether the on-off control of each circuit is accurate, whether protection functions such as overload protection, short-circuit protection, and undervoltage protection can be triggered normally, and whether the indicator lights display correctly, etc. Analyze the causes of the problems found during the debugging process in a timely manner and solve them.
2. **Performance Testing**
Use professional electrical testing equipment to conduct strict tests on aspects such as the insulation performance of the cabinet (checking whether the insulation resistance meets the standard), the grounding performance (checking whether the grounding is reliable), and the protection level (verifying whether it meets the predetermined protection requirements). At the same time, simulate different load working conditions to test the stability of the equipment under the actual operation state, check whether there are abnormal heating, excessive noise and other situations, and ensure that the overall performance of the customized GGD switchgear meets relevant standards and customer requirements.
### Packaging and Delivery
1. **Proper Packaging**
After the debugging and testing are qualified, select appropriate packaging materials and methods according to factors such as the size of the cabinet, the transportation distance, and the transportation mode. Generally, means such as wooden packing boxes, plastic film wrapping combined with foam cushioning are adopted to provide all-round protection for the cabinet to avoid damage to the cabinet or internal components caused by factors such as collisions, vibrations, and moisture during transportation.
2. **Timely Delivery**
Deliver the customized GGD switchgear safely according to the time, place and other requirements agreed with the customer, and provide detailed product manuals (including operation guides, maintenance points, etc.), electrical wiring diagrams, debugging reports and other materials along with the goods to facilitate the customer's subsequent use, maintenance and equipment management.
In conclusion, customizing GGD switchgear requires strict control of each link to ensure that the product finally delivered to the customer can meet or even exceed expectations in terms of function, performance and quality, and meet the needs of various different power usage scenarios.
