Electrical inspection of low voltage distribution cabinet

Low   The electrical (operation inspection) of the voltage distribution cabinet shall be inspected according to the electrical schematic diagram when all components and lines are normally connected, such as whether the function of the circuit breaker is normal; Whether the opening / closing, button, operation and other indicators are normal; Whether manual switching is normal; This kind of test shall be carried out one by one
If it is a low-voltage drawer cabinet, the cabinet shall be debugged first, and then the drawers shall be debugged one by one
The debugging shall be very detailed, and there shall be no missing parts Power on the low-voltage distribution cabinet (interlocking function test) to check the interlocking between the operating mechanism and the door, and between the drawer and the door
Under the condition of closing, the normal door cannot be opened
The door can only be opened after opening
For the mechanical or electrical interlocking between two power supplies, the circuit breaker of the standby power supply cannot be closed when the normal power supply is normal
When the main power supply is cut off, the standby power supply will automatically complete mutual switching Low voltage distribution cabinet (insulation resistance test) insulation test is a very important thing
I believe it is needless for me to say that everyone knows its importance
If the insulation is not good enough to produce electric shock, the equipment damage is a serious threat to the lives of operators
The positions of insulation resistance test of low-voltage distribution cabinet include: when the main switch is in the off position, between the incoming and outgoing lines of the same pole; Between live parts of different poles when the main switch is closed; Between main circuit and control circuit; Between each live element and the metal frame of the cabinet
The test time shall be more than one minute, and the test resistance must reach 0
5m&omega Among the popular low-voltage distribution cabinets in the market, MNS, GGD and other models are better cabinet types
Although the price is slightly higher, the quality is still very good, and the universality of components and drawers is better; Installation and debugging are also easier
The distribution cabinet must be installed carefully and carefully, and the installation preparation and construction scheme shall be prepared in advance; Each test and test shall be completed in accordance with the procedures, and records shall be made
Questions or problems shall be put forward and solved in time, and no accident potential shall be left
The inspection before power transmission must be rigorous, and pay more attention to the location where the nuclear problem is prone to failure; In the process of use, it is necessary to strictly abide by the operating procedures, never operate against rules, always be vigilant, and never ignore any potential safety hazards
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