Incorrect use of the switching power supply or the use of an unqualified switching power supply has caused a fire accident.
First, if the correct use of switching power supply
1) Select the power source that meets the requirements of the national standard
2) Use short circuit, overload protection power supply
3) Selection of component flame retardant power supply
4) Select the cable that meets the requirements of the national standard
5) Correct connection of power supply and luminous characters
Second, select the power source that meets the requirements of the national standard
Third, choose a short circuit, overload protection power supply
1) As the name suggests, the short-circuit protection of the power supply can effectively prevent the power supply from outputting a short circuit. If the current is too large, the power supply may be damaged or even cause a fire.
2) Overload protection to protect the power supply from damage due to overloading.
3) Secondly, for the input of 220V, the air switch should be connected. At the same time, an effective grounding should be implemented for the luminous characters installed in the sky to avoid leakage and lightning.
Fourth, select the flame-retardant components
Fifth, choose the cable that meets the requirements of the national standard
1) The cable quality on the domestic market is uneven. Many manufacturers sell copper-clad aluminum wire rods for profit, and this will cause great hidden dangers when they are used. Over-current capability will not work, resulting in overheating and overheating of cable currents, and it will also harm the entire luminous characters.
2), '2, 5 times multiplication by nine, and upsell by one shun,' said various types of cross-section aluminum core insulated wire of 2.5mm and below, its carrying capacity is about 9 times the number of sections. Such as 2.5mm wire, the carrying capacity of 2.5X9 = 22.5 (A).
3) At the same time, the power supply circuit should use a thicker cable than the output.
Sixth, the correct connection of power and light words
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The XUNDA petrolatum tape is a non-hardening and non-cracking corrosion protection wrap . It is also called wax tape, grease tape. It is highly resistant to mineral acids, alkalis, salts and micro-organisms and highly impermeable to water vapor and gases. Used for the protection of buried or exposed pipes, rods, cable, valves and metal fittings from corrosion.
It is composed of a non woven fibre fabric coated with a neutral compound based on saturated petrolatum and inert siliceous fillers.
Non-woven synthetic fibre impregnated and coated with a neutral compound based on saturated petrolatum hydrocarbons ( Petrolatum ) and inert siliceous fillers. It is supplied in rolls in a range of widths.
