Industrial electrical switchboards play an important role in the operation of electrical systems or plant systems. The design and installation of cabinets of quality and safety standards contribute to the safety and well-being of electrical systems and machinery.
The steps of designing and installing industrial electric cabinets include the following stages:
1. Make a map of the block of the electrical part to be installed (if there is already a circuit diagram)
2. Examine the market of materials to buy (look for quality, and overload, if you need to choose between two prices, choose which one is higher.) When the materials required by the diagram. Use the actual size of these materials to see what positions are placed on the most appropriate table
3. The auxiliary materials in the installation in the electrical cabinet. (such as the serial number attached to the wire, the iron rod used for magnetic starters, relays, timers, electrical connectors, etc.).
4. Put the units on the board (10mm thick board, or panel or iron board - place the board in the horizontal position when assembled)
5. After installation, test the electrical insulation of the panel with the units on the board (if the panel is iron) with a grid front with a 300watts circular lamp, see the operation of Are the components in line with the design process? Fix the wrong place, if any.
6. Try again with small loads. Then assemble the table of parts into the cabinet.
7. Make the cabinet frame to put the cabinet in place, pull the power cord from the engine into the cabinet, pull the grid.
8. Retry the ground wire, electrical safety (earth wire of cabinet door and cabinet body must be copper, flat wire, knit mesh, soft, hard to break)
Note:
The block diagram is related to the layout of the equipment in the cabinet, divided into three parts: power circuit, control circuit and circuit automatically.
On the safe side, a switchboard should be arranged in such a way that it is suitable for directing electricity into and out of the equipment used (three-phase power and load motors, location of power grid, location of workers using, operating machine to form a reasonable and safe installation location.
The mechanical part of the electrical cabinet sometimes needs to be watertight if it is operating in an environment where there is a lot of humidity in the cabinet: at least one main unit and one switch, The aptomat appears outside the cabinet. The reason is to completely isolate the grid line into the cabinet as needed. The cutting force can be selected as equivalent to the sum of the sub-loadings up to three times larger.
There is also a 220 volt electrical outlet in the industrial cabinet, so that when maintenance of the cabinet, light for use, easy to do. This voltage position is arranged where the wire mesh approach (usually placed in the upper left corner, sometimes right). One button off the emergency engine is needed. The location of the materials, if many, can be divided into separate areas for each function.
Top down downstream devices, such as large trains on a horizontal line, the inverters (if any, are usually located near the associated KDTs. Small KWTs on a horizontal line, intermediate relays, timer The rows of cassettes are plastic troughs of control wires. Dominoes are usually placed in the bottom row or placed along the inside of the cabinet.
Underneath the industrial electrical cabinet is usually a circular hole with three wires and a neutral wire, one for the wires running the motors, one for wire bundles to the control box (if any). wire to which part, wire rope sequence for that part immediately, usually pre-wire rope pre-wire (small wire), after the new wiring harness (wire), if possible to use electrostatic always The rope was finished. Industrial cabinet installation if used, should be designed to balance, firmly put in the cabinet, must have good welded contacts with earth wire to the cabinet.
Check the grounding wire of the industrial electrical cabinet by using a 300watt hearth light bulb: 1 input 220V power phase grid, the other end to touch the cabinet, the light bulb must be new electrical safety cabinets and can use. The first time it is necessary to test for the relevant engine running idle to determine the correct rotation. Try the function buttons for about 10 minutes. Test the cruise switches and its effect. Then load the truck.