Introduction:
Made of strength ABS and PC material, the enclosure has beautiful appearance, high plasticity and doggedness. LWHA series distribution box is suitable for terminal boxes, distributionpanels instrument boxes, electrical equipment boxes and control boxes. Moreover, it is simple and easy to use.
Low voltage electrical appliance of waterproof plastic distribution box composed of fuse, AC contactor, residual current protection device, capacitor and electric measuring digital meter. These low-voltage appliances are designed and manufactured according to GB1497 "Basic Standard for Low-voltage Appliances", which stipulates that the upper limit of ambient air temperature does not exceed 40. The average ambient air temperature in 24 hours does not exceed 35. The lower limit of ambient air temperature is -5 or -25.
In summer high temperature and hot weather, the low-voltage electrical appliances in the distribution box also produce their own heat in operation, and the external ambient temperature is also expected to rise. The temperature in the box is more than 60. At this time, the temperature may far exceed the ambient temperature specified in the NATIONAL standard of these appliances, leading to the failure of the distribution box. Reducing the temperature of distribution box and improving the technology of distribution box are the methods to reduce the failure of mcb waterproof distribution boxes.
What is the fault caused by ambient temperature?
1. Reactive power compensation capacitors and fuses working at high temperatures also shorten their life.
2. When the electronic products in the mcb waterproof distribution boxes (such as residual current protection device and electronic measuring instrument) work at high temperature, it will seriously affect the life of the product, and also affect the stability of the performance of the protector and the reliability of the action, as well as the accuracy of measurement.
3. All kinds of low-voltage appliances, most of which are class A insulation, have the limit allowable temperature rising to 65 during long-term operation. The high temperature in the distribution box and the production of the meter control box make it difficult for the low-voltage unit to release the internal heat working outside, so the insulation aging leads to burnout over a period of time.
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