Signal surge protective devices form a protective barrier by connecting in series between the signal channels and the equipment. When a surge voltage appears on the signal channel, the surge protector quickly diverts the excessive voltage to the ground through its internal protection components (such as varistors, gas discharge tubes, diodes, etc.), preventing voltage fluctuations from damaging the equipment.
By effectively absorbing and diverting surge currents, signal surge protective devices can shield equipment from electrical interferences such as lightning, power system overvoltage, and induced overvoltage, ensuring stable signal transmission and prolonging the lifespan of the equipment.
The signal surge protective device plays the following key roles in electronic systems:
Limiting Transient Overvoltage Caused by Induced Lightning
Induced lightning is one of the main causes of damage to electronic systems from lightning strikes, accounting for over 80% according to statistics. Installing signal surge protective devices can effectively limit the transient overvoltage caused by induced lightning, safeguarding electronic equipment.
Suppressing Surges Caused by Electronic System Operations
The start and stop operations of electronic equipment are another major source of surges in signal lines. Such operational surges commonly affect lines and equipment, especially sensitive components, which may deteriorate or fail. The spd for lightning protection can effectively reduce such surge phenomena, enhancing system stability and prolonging equipment lifespan.
Signal Type and Operating Voltage: Choose a suitable surge protector based on the operating voltage of the system signal.
Operating Current (IL) of the Circuit: Ensure that the signal surge protective device can withstand the operating current of the circuit.
Number of Protected Lines: Select the corresponding protector based on the number of signal circuit lines (2-wire, 3-wire, 4-wire).
By considering these factors, the safety of signal transmission can be effectively ensured, and overvoltage damage to equipment can be avoided.
Understanding Your Needs: A Guide to Selecting the Perfect Surge ProtectorMarch 1, 2024In an era dominated by electronic devices, protecting them from power surges is crucial. A surge protector acts as a guardian, shielding your valuable equipment from sudden voltage spikes. However, no...viewWhat are the differences in practical applications among the three types of SPD: voltage-limiting type, switching type, and composite type?February 2, 2024Surge Protective Devices (SPDs) are designed to protect electrical and electronic equipment from voltage spikes or surges. The three main types of SPDs are voltage-limiting type, switching type, and ...viewTechnical terminology in IEC61643 standards-2December 8, 20212.1.20 Reference Voltage UrefIn the area where the volt-ampere characteristics of the metal oxide resistor will transition from the weak electric field area to the strong electric field area, a suitab...viewWhat is type 2 surge protection？February 24, 2023What is type 2 surge protection？viewDetailed Explanation of Tiered Surge Protection for Distribution BoxesAugust 11, 2025In lightning protection, the surge protection device in distribution boxes plays a crucial role. According to the principle of graded lightning protection, and based on the likelihood of a building be...viewWhat Are the Requirements of Grounding Resistance Testers on the Resistance Value of Grounding Resistance?September 18, 20211. Grounding resistance test meter's requirements for the resistance value of the grounding resistance(1) Independent lightning protection grounding resistance is≤ 10Ω.(2) Independent safety pro...view
EN
jp 
ko 
fr 
de 
es 
it 
ru 
pt 
ar 
vi 
th 
ro 
bg 
nl 
