The low-voltage electrical appliances in the stainless steel distribution box are composed of fuses, AC contactors, residual current action protectors, capacitors and meters. The upper limit of the ambient air temperature does not exceed 40 ° C; the average value of the ambient air temperature of 24 h does not exceed 35 ° C; the lower limit of the ambient air temperature is not lower than -5 ° C or -25 ° C. The installation position of each stainless steel distribution box and switch box of the construction power distribution system should be reasonable. The total stainless steel distribution box should be as close as possible to the transformer or external power supply for the introduction of the power supply. The stainless steel distribution box should be installed in the center of the electrical equipment or the relatively concentrated load to ensure the balance of the three-phase load. The location of the switch box installation should be as close as possible to the electrical equipment it controls, depending on the site conditions and operating conditions.
The ambient air temperature is -5 °C ~ +40 °C, and the average value of 24h does not exceed +35 °C; the altitude of the device address does not exceed 2000m; the relative humidity of the air does not exceed 50% when the maximum temperature is +40 °C; The temperature may have a higher relative humidity, the monthly average minimum temperature of the wettest month does not exceed +25 ° C, the monthly average maximum relative humidity of the month does not exceed 90%, and the condensation on the surface of the product due to temperature changes is considered; Pollution degree 3; the temperature during transportation and storage can be between -25 °C and +55 °C, and the temperature can reach +70 °C in a short time (not exceeding 24 h).
Illuminated large stainless steel distribution box equipment is the equipment responsible for power control, protection, conversion and distribution at the end of the low voltage power supply system. Mainly composed of wires, components (including isolation switches, circuit breakers, etc.) and boxes.