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Relationship between Security power and surveillance cameras PDF 打印 E-mail
Competition and the social development let people's sense of security growing, which is the escalating power security systems. During this period, some of power are classified as the security power from power! (Security Power: Security Power is a professional power adapter for security electronics products design and production to special for the ripple, long life and exceptional) Security system monitoring is essential, let's take a look, the relationship between surveillance cameras with the security power:
  First, the camera and power:
    General: Infrared lamp diameter Φ5mm amount of current required is 10mA / stars, the infrared lamp diameter Φ8mm amount of current required to 30mA / teeth Φ8mm diameter infrared light with a condenser amount of current required to 50mA / teeth infrared lamp diameter Φ10mm amount of current required to 70mA / stars, and each camera (color) by itself also needs in terms of power consumption is about 150-250mA current, which means that you select the number of IR LED camera, but also should be multiplied by the amount of current required for each one lamp lights required for the total current draw, combined with the camera itself from the current 200mA (averaged), infrared machines with electric if you have another lens, then have to together with the required electric current 800mA camera around, you come to the infrared zoom camera out the work required current; particular prompt you that the wiring to the attention of the construction: current strength of the carrier wire line for the 2A/mm2 The (international standard), the industry generally 3A/mm2 line actually used by, the only 1mm2 maximum allowable size of the line current through 3A, which means that if you use the wire cross-sectional area of 1mm2, 10A or more even if you choose large power supply, is the actual current to the device for no more than 3A, cause you use the optional power supply electrical power failure, we can see the correct selection of wire transmission carrier is critical, the majority of such cases can be multi-line customers and friends shunt power supply in order to match. It is noteworthy that the infrared light infrared machine is also imported and domestic points, the actual needs of the electric power is not the same.
    Some might say: it is not so much of the high-voltage which is set up in the air. How will be able to meet so many users to use it . Actually, it is very simple, is that transmission voltage level, because it is the use of high-voltage transmission, we can assume that the voltage transmission 110KV, R = 15mm aluminum transmission line, the carrier wire cross-sectional area S = Π * R2, obtained S = 3.14 * 152 = 706.5】 【mm2, according to current international standards, the strength of the wire carrier is 2A/mm2, obtained through the wire to allow the current I = 706.5 * 2 = 1413A, according to electric power P = U * I, can be calculated out the wire transfer of electrical power P = 706.5 * 2 * 110000 = 155430000 【W】, high-voltage three-phase three-wire system commonly used transmission, you will also have a question 
  Second, integration between the camera and power:
    Cameras are marked general use with DC12V/AC24V,which kind of power should be to chose ? Please select AC24V power, because the same transmission distance, higher the voltage, the smaller the loss, the smaller the cost line, the load can be more adequate voltage. As a result of exchange of 24V, when the camera in the debugging, you can choose the power simultaneously, so that the whole monitoring system in the different devices of the image field frequency to maintain synchronization, but also in the head with the system and other equipment using the same type of power supply, camera matching Power is the most taboo: the system and all the cameras share a high-power linear power supply, because of system maintenance, it often need to turn on and turn off all the cameras at the same time power on instant start, starting current is particularly large for The impact of great power, a serious burn power, when the power fails, the entire system to a standstill. Especially in the case of some of the important import and export can not be monitored, resulting in unnecessary losses, the correct way is to do  If the above example, a business floor with 100 fixed cameras, for a total of about 800W of power, the correct configuration should be selected 4 sets, each 200W power supply. Thus, when a station power failure, you can receive the power of other work, and does not affect the entire system, the choice of camera power need to pay attention to the problem  First: The power connection to the camera, not to far away from the camera and the close proximity of the camera connected to the same power supply. If connected to the same power supply, power supply voltage is high, and will burn close to the camera, the power supply is low, the camera distance but no images. Should as far as possible from the distant camera connected to the same A power supply, the closer the camera connected to the same B power supply. Second: If the monitor is too far away, you need to configure a higher voltage power source such as 30V, 36V, 48V, etc., even for the 220V AC directly to the front and then converted to use low power supply, the third; small power supply as far as possible be placed next to the camera, no need to order the electric power loss, the fourth: if the camera is used outdoors, use a professional six outdoor water monitoring power, small ears, Steady, professional security power-founder, enjoys the reputation of security experts in power.
    Products include intelligent buildings power supply, such as video intercom, access control, attendance and electricity supply, generally 9Vdc, 12Vdc, 18Vdc, 24Vdc, etc., monitoring the power supply, including cameras, smart power high-speed ball machine, ball machine constant power supply, infrared dome camera power, PTZ power, codec power, DVR dedicated power supply, automotive power match, matrix, and keyboard power supply, such as processor power screens, generally 12Vdc, 24Vac, etc., anti-theft alarm power supply, including wired and wireless alarm host power supply, infrared radio detector power, etc., generally have 9Vdc, 12Vdc, 18Vdc, 24Vac, etc., communications equipment, including Optical dedicated power supply for power, fiber optic transceiver power, generally with a 5Vdc; products are hidden built-in power-type guard, Outdoor Wall waterproof power supply, indoor wall-mounted power supply, desktop, also known as double power series 【】, wall plug power supply series】 【also called single power, figures show high-power desktop power supply, box-type multi-output power series, 19-inch standard rack-mount 4U high power supply series, sub-AC → AC, AC → DC, DC → DC, DC → AC, etc., can be tailored to provide built-in power supply bare board products, products with most of UPS function, consistent with national use.
 
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