Spacing and Energy Matching Issues When installing a surge protective device (SPD), consider the energy matching between the two stages. Generally, when SPDs are installed at multiple locations on a l
At the junction of LPZ1 and LPZ2, at the distribution panel or before the UPS, a second-level surge protective device should be installed. Products that have passed T1 or T2 classification tests shoul
Installation Location According to IEC 131221 (LPZ) concepts, surge protective device should be installed when electrical lines cross the boundary between two lightning protection zones. Depending on
Residual voltage Ures of surge protective device This is the actual voltage applied to the terminals of the protected equipment. The lower the residual voltage, the better. It should be less than the
Protection Level Up This value should be greater than the maximum limiting voltage measured at the SPD terminals and consistent with the device's withstand voltage (Uw) (1.2U p ≤ Uw). It can be select
surge protective device (SPD) Maximum Continuous Operating Voltage Uc The maximum RMS voltage or DC voltage that may be continuously applied across the SPD is equal to the rated voltage of the SPD its
Voltage-Limiting Type surge protective device (SPD) Common nonlinear components include zinc oxide varistors and transient suppressor diodes. These are widely used overvoltage protectors and are gener
Principle Power supply surge protective device comes in two types: explosion-proof box and module. Both utilize a varistor with excellent nonlinear characteristics. Under normal circumstances, surge p
Function Power supply surge protective device is typically connected in parallel to the circuit system. When lightning strikes, high-intensity electromagnetic induction is generated in various metal p
Power supply surge protective device is suitable for AC 50/60 Hz, while power supply surge protector has a rated operating voltage of 220V/380V, including TT, TN-S, TN-C, and IT power supply systems,
Power supply surge protective device, also known as a power surge arrester, is suitable for AC 50/60 Hz power supply systems. Power supply surge protector, rated at 220V/380V, provides protection agai
Lightning discharges can occur between clouds, within clouds, or between clouds and the ground. Furthermore, the internal surges caused by the use of numerous high-capacity electrical devices impact t
Return loss: Indicates the proportion of the leading edge wave reflected by the protective device and is a direct measure of the compatibility of the protective device with the system impedance. Maxim
Maximum discharge current Imax: The maximum peak surge current the protector can withstand when a standard lightning wave with a waveform of 8/20μs is applied once to the surge protective device. Volt
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
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