NEW GENERATION SURGE ARRESTER (SPD)
In the simplest terms, a Surge Arrester (SPD) is the general name for products that facilitate the electron exchange (discharge) between clouds and the ground on electrical lines, similar to the lightning rods we are used to seeing on top of tall buildings.
Surge arresters are divided into three categories according to their voltage values: high voltage surge arresters, medium voltage surge arresters, and low voltage surge arresters.
Low voltage surge arresters are also internally divided into three classes according to their transmission capacities and sensitivities: Class B, Class C, and Class D.
Class B surge arresters are preferred for building entrances; they have lower sensitivity but higher load transmission capacity, with 25kA for each phase-to-ground and 50kA for neutral-to-ground, totaling 125kA.
Class C surge arresters are preferred for floor distribution boards; they have higher sensitivity than Class B and lower than Class D, with load transmission capacities of 10kA for each phase-to-ground and neutral-to-ground, totaling 40kA.
Class D surge arresters are protection products preferred for each sensitive device, having the highest sensitivity and load transmission capacities at the 6kA level in total.
One should not confuse surge arresters with regulators, power supplies (UPS), phase protection relays, and surge protector power strips. Surge arresters have the capability to transmit high currents, such as lightning, to the ground.
New generation surge arresters are extra-protected types of Low Voltage Surge Arresters that possess the power of Class B and the sensitivity of Class D. Additionally, thanks to their surge suppression features, they have the capability to prevent overvoltages that occur in the system.
One of the most fundamental advantages of new generation surge arresters is that the need for a good grounding system—the most important feature for the healthy operation of standard surge arresters—is not required for new generation models. They can fully perform protection between phases and phase-to-neutral even in systems with no grounding at all.
SURGE ARRESTER STANDARD
Looking at the EN 61643-11 LV surge arrester test standard, the categorization of surge arresters into Class B, C, and D is done according to their load transmission and sensitivity values. In other words, while surge arresters transmit the excess load in the line to the ground, the potential damage to the devices in the system is not tested.
In new generation surge arresters, the devices in the system are also tested, and the values are based on the fact that the devices are not damaged along with the surge arrester itself.
In summary, new generation surge arresters in Low Voltage systems are new generation types that can be used instead of Class B, C, and D surge arresters, can provide phase-to-phase and phase-to-neutral protection without grounding, and also possess surge suppression capability.
Trimbox branded new generation domestic surge arresters protect your systems and devices with a domestic production rate of 87.87%.
Simple precautions sometimes save lives. The best investment we can make for our family, our business, and our environment is protective measures. With Trim