Distribution box troubleshooting:
1, first to check the power distribution cabinet (power distribution cabinet, box substation, distribution box) below the electrical equipment, check whether there is a high power output in the accident period.
2, check the power distribution cabinet (power distribution cabinet, box substation, distribution box) inside and to each electrical equipment line connection, check whether there is a virtual connection phenomenon.
3. Investigate whether human factors (misoperation, etc.) cause short circuit during the accident.
4, check the electrical equipment (power distribution cabinet, box-type substation, power distribution box) whether there is damage (12 to 2 PM in the evening this time is the resources used, line voltage is higher, if the device itself on the edge of the damage, such as diode, in the case of a voltage reaches a certain degree of instantaneous breakdown phenomena may occur, causing short circuit)
(1) Fixed panel switch cabinet, often called switch board or distribution panel.It is a kind of open switch cabinet with panel shielding, the front has protective effect, the back and side can still touch the live part, the protection grade is low, can only be used for the continuity of power supply and reliability requirements of industrial and mining enterprises, for centralized power supply substation.
(2) protective (that is, closed) switch cabinet, refers to a low-voltage switch cabinet that is closed on all sides except the installation surface.Electrical components such as switches, protection and monitoring controls are installed in a closed enclosure made of steel or insulation material, which can be mounted on or off the wall.Each circuit in the cabinet can be separated without isolation measures, or grounded metal plates or insulation plates can be used for isolation.Usually the door is mechanically interlocked with the main switch operation.There are also protective platform switch cabinet (namely console), control, measurement, signal and other electrical appliances are installed on the panel.Protective switch cabinet is mainly used as power distribution device in process site.
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