Densely insulated bus duct (hereinafter referred to as bus duct) can be communication three-phase three-wire, three-phase four-wire, three-phase five-wire system, frequency 50-60Hz, voltage to 400V, rated operating current of 250-5000A, mainly as a new type of power supply and distribution equipment in industrial and mining, enterprises and high-rise buildings. The busway with plug-in day can easily lead out the power supply shunt through the plug-in connector box or pull-out switch box. The busway has the advantages of small size, compact structure, large transmission current, and convenient protection. The device of the bus duct can be connected from the transformer to the low-voltage distribution cabinet, and can also be directly connected to the distribution system from the low-voltage cabinet as the distribution trunk line.
. Scope of application
The busway operates normally for a long time in the following environments:
a. The altitude does not exceed 2000m;
b. The nearby air temperature is between -5 and +40 °C, and its uniform leakage is not higher than +35 C within 24 hours;
C. Clean air, the relative humidity does not exceed 50% at a high of +40°C, and a higher relative humidity is allowed at a lower temperature; For example, 90% at +20°C, but it should be taken into account that due to temperature changes, there is a possibility that moderate condensation may occur inadvertently and accidentally.
d. The pollution level is level 2:
e. The device type is class III and IV;
f. The device method is delineated according to the use of imitation sheets.
2.2 Busway TH type products in 2.1 a.b.e.f listed in the article f'f and the following articles under the normal T operation;
a. The relative humidity of the air is not more than 95%;
b. Local areas with condensation and mold
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