GDF Fixed Divided Switchgear

Product Model and Meaning:

Fixed type

Normal Service Environmental Conditions:

It is for indoor use. The altitude shall not exceed 2000m. If the altitude is higher than 2000m, the rated insulation level should be corrected accordingly. The maximum ambient temperature shall not exceed +40 °C, and the minimum ambient temperature shall not be lower than -5 °C (indoors) and not lower than -10 °C (outdoors). The maximum daily temperature difference is 15 °C – 25 °C. Relative humidity: 90% (at 25 °C), 50% (at 40 °C). It should be installed in places without severe vibration and impact, with the seismic fortification intensity ≤ 8 degrees, and the installation inclination shall not exceed 5 °C. It should be installed in places free from dust, corrosive gases or rainwater intrusion.

Structural Features:

The main frame of the device adopts 8MF/C section steel. The frame has two structural forms, namely assembly and partial welding. There are installation modular holes with E = 20mm on the main frame. The functional compartments of the device are strictly separated. The compartments are mainly divided into functional unit compartments, horizontal busbar compartments, vertical busbar compartments and cable compartments, and the functions of each unit are relatively independent. In addition, when designing the GDF, full consideration has been given to the heat dissipation problem during the operation of the cabinet. There are different numbers of ventilation holes at both the upper and lower ends of the cabinet. When the components inside the cabinet generate heat, the heat rises and is discharged through the slots at the upper end, while the cold air continuously enters through the slots at the lower end, so that a natural ventilation channel is formed from top to bottom in the sealed cabinet to achieve the purpose of heat dissipation. The incoming cabinet, tie cabinet and high-current feeder cabinet adopt withdrawable circuit breakers and copper busbar lap joints. Considering that users have various incoming line modes, such as top incoming line, bottom incoming line, side incoming line, etc., and in addition to the existence of the tie cabinet, a 300mm-wide busbar transfer cabinet is added, which can be combined with the main cabinet on either the left or right side, being flexible and convenient. The feeder cabinet and motor control center are equipped with dedicated cable compartments, which are separated from the functional unit compartments and busbar compartments by insulating epoxy boards. The connection among the three compartments is realized through multi-strand copper core cables, adapters and transfer copper bars, which not only improves the reliability of the device but also greatly facilitates the installation and maintenance of cables by users. The functional units are independent compartments, and the components are fixedly installed. The air switch adopts the plug-in type, and an operating handle is added to the door, which not only retains the advantages of the drawer cabinet but also overcomes the disadvantages caused by the numerous intermediate mechanisms of the drawer cabinet, being safe to use and convenient for maintenance. Nine single-modulus fixed units can be installed in each cabinet of the device, and each modulus is 200mm high. To increase the flexibility of user configuration, size series such as 1.5 units, 2 units and 3 units have also been added, with the rated current below 630A.