Problems caused by improper position of distribution box

  If the installation position of the electric box is not appropriate during the installation process, the city appearance may be affected, and it will also be damaged by external forces
Therefore, we generally recommend selecting the appropriate installation position
This not only effectively protects the distribution box, but also makes the distribution box more coordinated as a whole
Some power supply systems with protective neutral connection still adopt the three-phase four wire system
The zero line of the low-voltage power grid is long and has large impedance
When the three-phase load is unbalanced, the zero line will have zero sequence current
At the same time, due to environmental deterioration, wire aging, moisture and other factors, the leakage current of the wire also forms a closed loop through the zero line, resulting in a certain potential in the zero line, which is very unfavorable to the safe operation
Three phase five wire power supply mode is recommended Since the working zero line and protective zero line connected to the electrical equipment are laid separately, which can effectively isolate the dangerous voltage caused by the three-phase four wire power supply mode, the shell of the electrical equipment is always at “ Ground potential ”, So as to eliminate the hidden danger of dangerous voltage generated by the equipment
The spacing of distribution boxes is too small, the gap between electrical appliances and between phases is small, and some have no obvious disconnection points, which not only brings danger to electricians' operation, but also makes it impossible to replace fuses with electricity in rainy and foggy weather; The distribution box is generally lack of phase failure protection, and the motor is burnt out due to phase failure from time to time; Some distribution boxes do not use electronic watt hour meters, so it is impossible to implement remote centralized meter reading; Some distribution boxes are closed all year round and lack routine maintenance In some office places with poor power supply system, we should increase the specification of distribution box to facilitate maintenance, and if necessary, we need to take forced cooling measures or select high-temperature electrical appliances, which can effectively reduce the failure rate
For intelligent equipment, we need to dynamically manage it, so as to achieve safe, high-quality and reliable power supply
Beijing jiyeda electric control cabinet meter box distribution cabinet manufacturer: http://www
jtcele
com/