surge protective device Grounding Wire Diameter Selection Data cables: Required to be greater than 2.5 mm²; when the length exceeds 0.5 meter, greater than 4 mm². Power cables: When the phase cable cr
To limit inductive coupling between the protected portion and unprotected equipment after surge protective device installation, certain measurements are required for surge protector. Mutual inductance
Level 4 and Above Depending on the voltage rating of the protected equipment, if two levels of surge protective device can limit the voltage below the equipment's voltage rating, only two levels of pr
Third-level protection The purpose is to provide the ultimate means of protecting equipment by reducing the residual surge voltage to below 1000V, preventing the surge energy from damaging the equipme
Second-level protection The purpose is to further limit the residual surge voltage passing through the first-level surge arrester to 1500-2000V and establish equipotential bonding between LPZ1 and LPZ
First-level protection The purpose is to prevent surge voltages from directly transmitting from LPZ0 to LPZ1, limiting surge voltages ranging from tens to hundreds of thousands of volts to 2500-3000V.
Basic Circuit Basic Circuit The surge protective device circuit can take different forms depending on the needs. Its basic components are the ones described above. A skilled lightning protection produ
A quarter-wavelength short circuit is a microwave signal surge protective device created based on spectrum analysis of lightning waves and standing wave theory of antenna feed lines. The length of the
The surge protective device choke coil component is a common-mode interference suppression device with a ferrite core. It consists of two coils of identical size and number of turns, symmetrically wou
(1) Breakdown voltage: This refers to the breakdown voltage of the surge protective device at a specified reverse breakdown current (usually LMA). The rated breakdown voltage of a Zener diode is gener
The surge protective device suppressor diode has a clamping voltage-limiting function and operates in the reverse breakdown region. Due to its low clamping voltage and fast response, the surge protect
The surge protective device varistor element is a metal oxide semiconductor nonlinear resistor primarily composed of ZnO. When the voltage across it reaches a certain value, the resistor becomes highl
The surge protective device gas discharge tube consists of a pair of spaced-apart cold cathode plates encapsulated in a glass or ceramic tube filled with an inert gas (Ar). To increase the triggering
The surge protective device discharge gap (also known as a protective gap): It generally consists of two metal rods separated by a certain gap, exposed to air. One of the rods is connected to the powe
The surge protective device is an indispensable device for lightning protection of electronic equipment, formerly known as a "lightning arrester" or "surge protector," abbreviated as SPD. The surge pr
The peak current of an 8/20 μs current waveform flowing through surge protective device. This is used for Class II classification testing and as a precondition for Class I and Class II classification
The voltage protection level of surge protective device should not exceed the surge voltage rating of the protected equipment. The voltage protection level of surge protector requires good coordinatio
Or when the power transmission line is struck by direct lightning, the huge energy conducted will be discharged. At the junction of each zone (including LPZ1 zone) after the first protection zone, a v
Because lightning strikes are incredibly powerful, a graded discharge method is necessary to gradually dissipate the energy to the ground. In the non-direct lightning protection zone (LPZ0A) or at the
Combination type surge protective device. Combination of voltage switching type components and voltage limiting type components. This type surge protector can display the characteristics of voltage sw
Voltage limiting type surge protective device. When there is no transient overvoltage, it has high impedance, but as the surge current and voltage increase, the impedance of surge protector will conti
Voltage switch type surge protective device. It presents high impedance when there is no transient overvoltage. Once it responds to lightning transient overvoltage, the impedance surge protector sudde
According to the working principle of surge protective device, surge protector can be divided into voltage switching type, voltage limiting type and combined type surge protection device.
surge protective device is an indispensable device in lightning protection of electronic equipment. The function of surge protector is to limit the instantaneous overvoltage that penetrates into the p
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