Use conditions of low-voltage withdrawable switchgear

Low-voltage switchgear is used as a product for power transmission, power distribution and electric energy conversion, which can meet the requirements of reliable fixing of various electrical components in a determined position in the cabinet. The cabinet shape is generally cubic, such as screen type, box type, etc. Through more than ten years of development, the low-voltage withdrawable switch rejects the body structure, and the drawer structure and busbar installation methods have been greatly improved.

Low-voltage withdrawable switchgear has the characteristics of safe operation, reliable operation, compact structure, convenient maintenance, beautiful appearance and high degree of standardization, and has been widely used in low-voltage power distribution systems.

In the low-voltage power distribution system, the selection of protective appliances and control appliances is related to the electrical safety and use of electrical equipment. The correct selection of protective electrical appliances not only protects the line conductors from damage, but more importantly, prevents electric shocks due to insulation damage and fires caused by overheated wires.

The normal use environmental conditions of low-voltage withdrawable switchgear are as follows:

● The ambient air temperature is not higher than +40℃, not lower than -5℃, and its average temperature within 24h is not higher than +35℃;

● Atmospheric conditions: the air is clean, the relative humidity does not exceed 50% at a high temperature of +40℃, and a higher relative humidity is allowed at a lower temperature, such as 90% at +20℃, but to take into account temperature changes, there is May occasionally produce moderate condensation;

● The altitude does not exceed 2000m;

● This low-voltage withdrawable switch device is suitable for the transportation and storage process of the following temperature: between -25℃ and +55℃, it can reach +70℃ in a short time (not more than 24h). The device cannot be installed at these extreme temperatures. Should suffer any irreversible damage, and should be able to work normally under normal conditions;