GCK withdrawable switchgear (hereinafter referred to as the switchgear) is applicable to the low-voltage power distribution system with AC 50Hz, rated working voltage AC 380V and rated insulation voltage 660V. It is used for power distribution, power, lighting, motor control, etc. It includes the functions of power center (PC) and motor control center (MCC). It has advanced structure, beautiful appearance, good electrical performance, high protection level, safety and reliability and convenient maintenance. It is an ideal power distribution device for low-voltage power supply system in metallurgy, petroleum, chemical industry, electric power, machinery, light textile and other industries.
The basic frame of the switch cabinet is a combined assembly structure, which is all connected by screws. A complete switch cabinet is composed of door, partition, support, bus, drawer and electrical components. The main features are as follows:
The external dimensions and opening dimensions of frames and parts change according to modulus E = 20mm;
Since all structural components of the frame are fastened and connected by screws, the welding deformation and stress are avoided, the accuracy is improved, the versatility is strong, the applicability is good, and the mechanical strength is large, which fully meets various performance requirements and changes of the switch cabinet;
In the MCC scheme, the interior of the switchgear is divided into three areas (rooms), bus area, electrical equipment area and cable area, and the three areas are separated by steel plates to ensure the normal operation of the line and effectively prevent the expansion of faults. When the cabinet is pulled out, the charged bodies in the cabinet are not exposed, safe and reliable;
In the PC scheme, the manual mechanism of the circuit breaker protrudes outside the door. During manual operation, there is no need to open the door plate, which is safe and convenient;
In the fixing scheme, it not only retains the characteristics of simplicity, practicality and low price of the fixing scheme, but also has the same appearance shape of the drawer cabinet. Its interior is also divided into bus area, electrical equipment area and cable area, which are separated by steel plate or insulating plate to ensure safety and reliability. It is an ideal equipment to replace domestic fixed old products;
The drawer of MCC cabinet has four standard sizes, which are 200, 300, 400 and 60o respectively, with light structure, convenient assembly and high dimensional accuracy. Four standard sizes can be selected according to the design and user requirements. The drawer unit has good interchangeability, working position and separation position, and the handle can be locked in the specified disconnection position by padlock;
When the switch cabinet is designed as two power supply forms of three-phase four wire and three-phase five wire, the neutral bus N line and protective grounding bus PE line are installed at the lower side of the cabinet bottom, and the outgoing end is connected by bus, which makes it very convenient for users to connect cables;
In order to ensure the reliable continuity of grounding, all drawer guide rails and other general parts in the cabinet are galvanized;
The top of the switch cabinet is provided with a natural ventilation net cover without reducing the protection grade of the shell.
The cabinet adopts frame structure with high mechanical strength; The whole shall comply with GB7251 1. National standard, with high degree of standardization and strong universality; The protection grade shall meet the requirements of ipsx in gb4208.