What is the SPD power supply?
Two, SPD basic components and their working principle:1. discharge gap (also called protective gap):It usually consists of two metal rods exposed in the air separated by a gap formed (Figure 15a), the protection equipment of a metal rod with the required power line L1 or zero line (N) is a metal bar and ground wire (PE) is connected, when the instantaneous overvoltage hit that gap is a part of the breakdown, the charge voltage into the earth, to avoid the protected equipment voltage increases. Between the two metal rods that discharge gap distance can be adjusted according to need, the structure is simple, the disadvantage of poor performance. When the arc discharge gap improved for the angle of its clearance. The function of arc extinguishing than the former as well, it is * loop electric F and hot air rising function which the arc is extinguished.2. gas discharge tube:It is composed of a pair of mutually left cold cathode encapsulated in an inert gas filled a glass tube (Ar) or ceramic tube composition. In order to improve the probability of triggering the discharge tube in the discharge tube, and help trigger. The gas discharge tube with diode type, also have the triode type,
Classification of SPD:1, according to the principle of division:1 switch type: its working principle is when no transient voltage is high impedance, but once the response of lightning transient overvoltage, the impedance mutated into low value, allowing the lightning current through. This device used when devices are: discharge gap, gas discharge tube, thyristors.Pressure type 2 limit, its working principle is when there is no instantaneous overvoltage for high resistance, but with the surge current and voltage increase the impedance decreases, the current voltage characteristic is strongly nonlinear. Such devices are used as devices: Zinc Oxide, varistors, diode, avalanche diode.3. shunt type or choke typeShunt type: in parallel with the protected device, the lightning pulse is low impedance, while the normal operating frequency is high impedanceChoke mode: in series with the protected device, the lightning pulse exhibits a high impedance, while a low impedance is applied to the normal operating frequencyThe devices used for such devices include choke coil, high pass filter, low pass filter, 1/4 wavelength short circuit, etc.According to the use of points: (1) power protector: AC power protector, DC power protector, switch power supply protector, etc.(2) signal protection: low frequency signal protection, high-frequency signal protector and antenna protector.
Surge protection device (Surge protection Device) is an indispensable device of lightning protection of electronic equipment, used to be called "lightning arrester" or "overvoltage protector" English - SPD. surge protector is the function of the instantaneous channeling into the power lines, signal transmission line overvoltage can withstand voltage range in the equipment or system, or a powerful lightning flow into the ground, do not damage the protection of the protected equipment or system affected by the impact.Surge protector structure according to different types and different applications, but it must contain at least one nonlinear voltage limiting element. For the basic components of surge protection device: the discharge gap, gas discharge tube, a voltage sensitive resistor, diode and choke coil.
How does a surge protector work?A surge protector, like an electric sponge, absorbs dangerous additional voltages and prevents most of this voltage from entering your sensitive deviceA telephone line protection function of anti surge socket for the electric device you provide the most complete protection, to prevent adverse surge damage. The surge and the peak voltage will destroy or degrade the performance level of your valuable electronic equipment by telephone and power line surge. Perfect protection function can protect such as computers, telephones, modems television and other electronic equipment and household electric appliances. The surge socket, you can make the electrical equipment and telephone equipment, lightning protection, stable working and prolonging the service life of the electric appliances.Product features:Protective telephone /DSL/ broadband lineProtects maximum peak current up to 45000 a.Provides maximum protection up to 1780 joules energy levelFiltered electromagnetic / radio frequency interference (EMI/RFI)Responds in 1 seconds to protect the device
Surge protective deviceSurge protection (Device) is an indispensable device in the lightning protection of electronic equipment. It used to be called "lightning arrester" or "over-voltage protector". The English abbreviation is SPD.What are surge (also known as surge) and peak voltage?The surge and the peak voltage (pulse) refers to "increase the conventional" voltage, usually by increasing or dramatic changes in electricity demand caused by the opening of high-power electrical appliances, vacuum cleaners, air conditioning, washing machine can cause surge and peak voltage. Any type of interference can be damaged beyond the actual maintenance of electronic equipment.. in addition, bad weather (lightning) and power company daily pull gate and maintenance work will give a devastating power line surge.
