Things about waterproof dimmable power supplies-Ptpower Electronic

Zhuhai Ptpower Electronic Technology Co., Ltd.

Things about waterproof dimmable power supplies

2024-12-17

Q1. How is a dimmable power supply made?

The power supply consists of several main parts: when the mains power enters the power supply, it first uses a choke coil and capacitor filtering to remove high-frequency noise and interference signals, then rectifies and filters to obtain high-voltage DC. Next, it converts the DC into high-frequency pulsed DC through a switching circuit, which is then sent to a high-frequency switching transformer for voltage reduction. After filtering out the high-frequency AC part, it finally outputs low-voltage DC.

Having discussed the principle of dimmable power supplies, let's talk about other knowledge regarding waterproof dimmable power supplies. As the name suggests, waterproof dimmable power supplies have waterproof functions, so the question arises,

Q2. How is the power supply waterproof?

The power supply has a parameter: IP rating, which indicates the dust and water resistance level. It is usually followed by two digits, where the first digit indicates the solid protection level and the second digit indicates the liquid protection level. Based on the different numbers of the product casing, one can quickly and conveniently determine the product's protective capability. Ouches products have three levels of dust and water resistance:

Of course, the power supply also has parameters for short circuit, overload, and over-temperature protection, which do not need much explanation; it means what you understand.

Q3. Surge level 4KV?

When the circuit is struck by lightning or when connecting/disconnecting inductive loads or large loads, it often generates very high operational overvoltage. This instantaneous overvoltage (or overcurrent) is called surge voltage (or surge current), which is a type of transient interference. It can cause damage to power supply equipment and other hardware, leading to direct economic losses.

The surge current standard for Ouches LED power supplies is:

At the rated maximum voltage, the surge current that the power supply can withstand when connected with a cold machine input line is: for models below 30W ≤ 40A, for models above 30W ≤ 60A.

In addition, R&D engineers have something to say. Professional engineers are available for online Q&A.

Question: What should be noted when choosing a waterproof dimmable LED power supply?

Answer:

A. To extend the lifespan of the waterproof "constant voltage" power supply, it is recommended to choose a model with an output power rating of 20% higher. For example, if the load is 120W, it is advisable to select a 150W waterproof LED power supply, and so on, which can effectively enhance the lifespan of the waterproof power supply.

B. Consider the operating environment temperature of the waterproof power supply and whether there are additional auxiliary cooling devices. When used in excessively high ambient temperatures, the load effectively increases, so the waterproof power supply needs to reduce its output.

C. The power supply for street lights should correspond to the use of conventional power supplies.

D. Choose the required product certifications and performance parameters, specifications, such as CE/PFC/EMC/ROHS/CCC certifications, etc.

Question: Why does the waterproof power supply fail to start smoothly when the load is a motor, bulb, or capacitive load?

Answer:

When the load is a motor, bulb, or capacitive load, the current is too high at the moment of startup, far exceeding the maximum load of the waterproof power supply, which causes the waterproof power supply to fail to start smoothly.

If your light fixture is flickering, you might want to take a look at this.

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