The drawer type switch cabinet is a closed shell made of steel plate, and the electrical components of the incoming and outgoing circuit are installed in the withdrawable drawer to form a functional unit that can complete a certain type of power supply task. The functional unit is separated from the bus or cable by a grounded metal plate or a functional plate made of plastic to form three areas of bus, functional unit and cable. Isolation measures are also taken between each functional unit.
Drawer type switchgear has high reliability, safety and interchangeability. It is a relatively advanced switchgear. At present, most of the switchgear produced are drawer type switchgear. They are suitable for industrial and mining enterprises and high-rise buildings that require high power supply reliability as centralized control distribution centers.
GCS type low-voltage switchgear is generally equipped with clear 3-section positions. GCS type drawer type switchgear has a major disadvantage. Its structure fabrication, especially assembly, is troublesome, and most of them are connected by bolts. The drawers are divided into five series: 1 / 2 unit, 1 unit, 1.5 unit, 2 unit and 3 unit. There can be at most 3 PC cabinets and 22 drawer circuits in MCC cabinet, The installation module hole of the main cabinet is e = 20mm and 100mm, the drawer layer height is 160mm, the bus is flat at the back, there are outlet channels at the top and bottom of the cable room, and the panel has obvious signs of opening, closing, test and extraction positions.
GCK type low-voltage switchgear has high breaking capacity, good dynamic and thermal stability, advanced and reasonable structure. GCK type drawer type switchgear has flexible electrical scheme, strong seriality and universality, arbitrary combination of various scheme units and one cabinet.
The drawer has the advantages of large number of circuits, saving floor area, high protection level, safety and reliability, convenient maintenance, etc. the drawer is divided into 1 / 2 unit, 1 unit, 2 unit and 3 unit, up to 9 units can be installed, and the cabinet can be installed with 18 units. The drawer has closing, opening, testing and extraction positions, which can not only ensure normal operation, but also safely overhaul the components in the drawer. From the propulsion mode of the drawer, it is basically divided into single pull-in type, double pull-in type and swing in type.
Most of some drawer units have no clear 3-off position and can only realize basic interlocking. Most of them have no experimental position. The installation module hole of the main frame is e = 25mm. The height of the drawer cabinet of GCK drawer switch cabinet is 1800mm. Each functional unit occupies an independent compartment and the drawer floor height is 200mm. However, with the development of the electrical industry, the volume of the circuit breaker is getting smaller and smaller and can also be installed horizontally.
The structure of MNS low-voltage switchgear is combined, and MNS drawer switchgear is divided into standard type and non-standard type. All structural parts of the frame are galvanized or folded into profiles by galvanized plate and imported aluminum zinc coated plate.
Modular hole e = 25mm, which is connected through various connectors, self tapping locking screws and grade 8.8 hexagon bolts. The frame structure can be assembled without special tools. The partition plate in the cabinet adopts segmented multi-functional isolation plate, which can realize mixed loading of PC cabinet and MCC cabinet. The drawer layer height is 200mm, which can be divided into 8e / 4, 8e / 2, 8e, 16e and 24E. The effective height of MCC cabinet is 72e, and 36 outgoing circuits can be installed at most.
柜體外型尺寸（寬×深×高）：600（800、1000）×800（600、1000）×2200，單位：毫米。 作者：電氣設計李老師 https://www.bilibili.com/read/cv11531298 出處：bilibili
Overall dimension of cabinet body (width) × deep × Height: 600 (800, 1000) × 800（600、1000） × 2200 in millimeters. Author: Electrical Design Teacher Li https://www.bilibili.com/read/cv11531298 Source: BiliBili