Waterproof transformer environment
1, the surrounding air temperature -30 ℃ to +40 ℃, the average value of 24 hours does not exceed +35 ℃; more than +40 ℃ when the load capacity of the transformer decreases, less than 0 ℃ below the load capacity of the transformer rises, the load power can be slightly beyond the rated power. -30 ℃ low-temperature environment toroidal transformer can still start and work normally, low-temperature characteristics of good is the advantage of the toroidal transformer.
2, waterproof transformer on the installation site sea level no requirements.
3, rainproof transformer around the air humidity is recommended maximum not more than 90%, the average monthly humidity is recommended not more than 75%. In the environment of high humidity, it is recommended to use waterproof transformer, waterproof transformer has no requirement for air humidity.
Waterproof transformer product classification
1, potting waterproof transformer
Small waterproof transformer, the main purpose of moisture, the main application PCB circuit board. Transformer using a high-frequency inductive transformer, or 5W EI low-frequency transformer, protective shell (cover) generally use plastic shell or iron shell, transformer skeleton using the pin type, input and output using the pin pin out.
2, toroidal waterproof transformer
The use of toroidal transformer made of waterproof transformer, the main purpose of the rain or water immersion, the main application occasions outdoor lamps and lanterns, urban lighting projects, mining, mining, marine equipment, industrial atomization humidifier.
Capacity is generally 40VA to 2000VA, protection class IP67, toroidal waterproof transformer special needle outdoor rain (outdoor wall mounted), water immersion (pool, river, seaside), air humidity and other applications designed. In order to cope with outdoor high temperature environment may occur, the transformer adopts a toroidal transformer, toroidal transformer has the advantages of high efficiency, low temperature rise; protective shell (enclosure) is no longer generally used iron shell and plastic shell, but the use of aluminum shell to facilitate heat dissipation; in order to improve the product voltage regulator performance and reduce the difficulty of outdoor construction and installation, the toroidal waterproof transformer is generally designed with an overload and short-circuit protection; in order to cope with the daytime Strong sunlight in the strong ultraviolet caused by wire aging, and low outdoor temperatures in the northern winter environment, the input and output leads must be used with cold and ultraviolet-resistant characteristics of the wire. In the guardrail tube, buried lights, underwater lights, fountain lights and other supporting the use of waterproof power supply, according to many years of experience, when the outdoor temperature is below minus 30 degrees after the switching power supply is generally prone to the phenomenon of power on the start-up difficulties, while the toroidal transformer does not! This is also in the outdoor lamps and lanterns, city lighting project in the outdoor power supply, the south with switching power supply more, the north with toroidal waterproof transformer more.