JUCEG is a manufacturer and supplier specializing in supplying GCS low voltage withdrawable switchgear.GCS low voltage withdrawable switchgear has been widely adopted by power users and is suitable for distribution, centralized control of electric motors, reactive power compensation, etc. in power generation and power supply systems with a three-phase AC frequency of 50 (60) Hz, a rated working voltage of 380V (400V, 660V), and a rated current of 4000A or below.The GCS low-voltage withdrawable switchgear has been widely used in large power plants, petrochemical systems and other places with high automation levels and requirements for computer interfaces. As a low-voltage distribution device for three-phase AC power with a frequency of 50 (60) Hz, a rated working voltage of 380V (400V, 660V), and a rated current of 4000A or less, it is used in power generation and supply systems for distribution, centralized control of motors, and reactive power compensation, playing an important role.
Rated Voltage: Main circuit AC 380V (400V, 660V), auxiliary circuit AC 220V, 380V (400V), DC 110V, 220V.
Rated Frequency: 50 (60) Hz.
Rated Insulation Voltage: 660V (1000V).
Rated Current: Horizontal bus ≤ 4000A, Vertical bus (MCC) 1000A.
Rated Short-Term Withstand Current of Bus: 50kA, 80kA (1s).
Rated Peak Withstand Current of Bus: 105kA, 176kA (0.1s).
Power Frequency Test Voltage: Main circuit 2500V/1min, auxiliary circuit 1760V/1min (some materials mention 2000V/1min).
Withdrawable and fixed switchgear possess distinctive attributes that allow their application in different situations in electrical power systems. GCS low voltage withdrawable switchgear is made for applications where variable factors and easy reach are very important. These systems allow for the single pulling out of the specific component which doesn’t affect the entire system, thus simplifying the maintenance and upgrading processes. This type of switchgear is appropriate in complex power systems as downtimes need to be avoided as much as possible. On the other hand, fixed switch gear is consistently more durable and inexpensive; however, it is targeted to areas where the maintenance of assets is rare and demand for replacement of equipment is low. They provide a relatively more constrained solution, which is a must in certain confined installations.
When reviewing the top 3 search results, a trend emerged from the search, which focused on some key technical parameters that set apart these types of switchgear:
· Accessibility: The major concern with respect to the units that are withdrawable is that they can be easily accessed, thus enabling easy and fast maintenance, repair, and replacement of the components, which is the case with systems that have high uptime requirements.
· Cost: Fixed switchgears are however preferred especially for cost considerations as they are less expensive due to simple structure and low maintenance requirements.
· Size: The compact nature of fixed switchgear is also indicated as the main advantage in situations where spatial placement is concerned.
The GCS low-voltage withdrawable switchgear is a three-phase AC power distribution device with a rated working voltage of 380V (expandable to 400V and 660V), and a rated current of up to 4000A (improved version can reach 6300A). Its core functions include power distribution, centralized control of electric motors, and reactive power compensation. It is widely used in power plants, petrochemical industries, metallurgy, textiles, high-rise buildings, and other industries' power distribution systems.
The switch cabinet adopts a drawer-type structure. Each drawer is an independent functional unit, with a height module of 160mm. GCS low voltage withdrawable switchgearis divided into five size series: 1/2 unit, 1 unit, 1.5 unit, 2 units, and 3 units. The height of the drawer can be adjusted, while the width and depth are fixed, ensuring the interchangeability of the same functional units. The drawer panel is equipped with position indicators such as "open", "close", "test", and "withdraw", and also comes with a mechanical interlock device to prevent accidental operation. The drawer is pushed forward through a sliding slot and sliding block structure, and the spring limit locking device enhances stability and prevents overheating of components or drawer detachment.
The cabinet is divided into functional unit room, busbar room and cable room. Each room is strictly isolated to prevent the spread of faults. The functional unit room accommodates the drawer unit, the busbar room arranges the horizontal busbar, and the cable room realizes the up-down entry and exit of cables. The horizontal busbar is arranged in a horizontal position at the back of the cabinet, enhancing the ability to resist electric forces and enabling the main circuit to have high short-circuit strength (the dynamic stable current can reach 76kA). The vertical busbar has a rated current of 1000A (for MCC cabinets), meeting the requirements for large-capacity power distribution.
Plug-in and adapter: The incoming and outgoing lines of the drawer use different number of strip structures of plug-in components according to the current size to ensure reliable contact. The 1/2 unit drawer is connected to the cable compartment through the backplate-type ZJ-2 type adapter. The unit drawer adopts the rod-type or tube-type structure of ZJ-1 type adapter to reduce temperature rise and improve reliability. The cable compartment design of GCS low voltage withdrawable switchgear supports both upper and lower incoming and outgoing lines. The zero-sequence current transformer is placed in the compartment for easy installation and maintenance. The width of the compartment can be selected as 240mm or 440mm to meet different cable quantity requirements.
Address
1-3/F, Building C, No. 288 Weiqi Road, Yueqing Economic Development Zone, Yueqing, Wenzhou, Zhejiang Province, China
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