Outdoor electric box plastic distribution box are generally installed with a large number of thermal relays, circuit breakers, capacitors and other devices, these devices will generate a lot of heat in the process of use, if the heat generated can not be timely distributed, it may burn these devices, serious or even cause distribution cabinets explosion and other serious consequences.
So the outdoor distribution box in the production and processing production of the early stage, the distribution box design stage must consider various environmental factors, to avoid later due to the distribution box caused by the damage of components inside. So the distribution box design is considered in the rain, insect and heat dissipation.
The most common way of heat dissipation of the electric box plastic distribution box is to open heat dissipation holes on the cabinet board in the concentrated area of the electrical components of the distribution cabinet, and use natural ventilation or air conditioning in the distribution room to achieve the heat exchange in the distribution cabinet. The easiest way to realize the heat dissipation hole is to cut the runway shaped heat dissipation hole on the distribution box board. This heat dissipation hole is undoubtedly the most economical and effective for the indoor distribution box. It can be used outdoors, and the rain proof effect is very poor. In addition, outdoor insects into the distribution cabinet is greatly increased, insects in the distribution box after entering the cabinet, crawling between the electrical components, may lead to a short circuit, and electric shock after the death of the body is undoubtedly also have an impact on the electrical efficiency.
The ordinary design of the heat dissipation hole, is directly opened under the cabinet panel, no shelter, once the weather rains, the rain will be able to enter the distribution cabinet, causing electrical damage. For example, a commonly designed heat sink is like a window in a high-rise building with smooth side walls. If it rains slightly, the window must be closed. Otherwise, water can easily enter the house, wet the carpet and furniture, and there is no connection between the lower floors.
Outdoor distribution cabinets are generally placed in places with sparse population or relatively few human activities, which are also frequented by small animals such as snakes, rats and insects. Due to the existence of the heat dissipation hole, the distribution box cabinet becomes an open box, if snakes, rats, insects and other small animals into the box, it is possible to cause damage to the electrical appliances in the box, circuit, serious more likely to cause circuit short circuit, explosion and other accidents.
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