The temperature rise of the bus duct refers to the temperature rise value obtained by subtracting the ambient temperature from the temperature stabilized by the rated current when the bus duct is running at full load with the rated current, which is usually expressed in K.
The temperature rise will shorten the life of the bus, increase the power loss, and reduce the voltage, and also affect the temperature of the surrounding environment, accelerate the aging of the insulation materials of the surrounding equipment, and even cause safety accidents.
Among the fire accidents in China, the fire accidents caused by electrical more than 60% of the entire fire accidents. The perpetrators of fire accidents caused by electricity include: cables, wires, high and low voltage complete sets of equipment, transformers, bus ducts, electrical components, etc., most of which are caused by fire accidents caused by long-term temperature rise and heat, resulting in the aging of insulation materials and short circuits.
The temperature limit and escalation value can be said to be the key safety technical parameter of the bus duct, and it is also an important indicator to reflect the overall performance of the bus duct. Users can also learn the following questions from the temperature rise of the busway:
1. The heat dissipation performance of the bus duct: the heat dissipation of the insulating material and the shell structure is not good, and the temperature rise is naturally high.
2. The purity of the bronze medal: the copper content is directly related to the resistivity of the conductor, and the greater the resistivity of the same conductor specification, the higher the temperature rise.
3. The quality of the connector structure: if the connector contact is not good, the temperature rise will be high.
4. The cross-sectional area of the conductor: the cross-sectional area of the conductor with the same structure and technology and the same copper content is small, and the temperature rise is naturally high.
