Does the hotel use high frequency or low frequency card to get electricity?

The hotel uses low frequency card to get electricity, which is safe.

Plug-in card power switch, also known as power switch, energy-saving switch, energy-saving switch. Mainly used in hotels and guesthouses. When the room is vacant, cut off the power supply to the room. So as to realize electricity safety and energy saving.

The hotel uses a door-opening card to get electricity. When the guest leaves the room, he takes the door opening card (the guest must pull it out, because the guest will come back with this card to open the door), and the power-saving switch will automatically cut off the power supply of the hotel after delaying for 20 seconds, which will not only bring direct economic benefits to the hotel (save a lot of electricity bills), prolong the service life of electrical appliances in the room, improve the safety factor of electricity consumption in the room, but also effectively realize the minimization of energy saving and investment cost of the hotel and achieve the effect of "energy saving and emission reduction" of the hotel.

Circuit principle

Card power switch is generally composed of high and low voltage power conversion part, identification card part and output part. Among them, there are many ways to convert power supply, such as switching power supply, resistance-capacitance step-down, transformer and so on.

The high-low voltage conversion part reduces the AC voltage to DC low-voltage power supply to the identification part and the output part. The identification card part obtains the standard signal of the identification card part by detecting whether the inserted card meets the preset standard (mainly the above-mentioned 2-8 * * * 6 ways), and connects the AC power supply (live wire). According to different load requirements, this part includes 30A, 40A, etc.