SVU2-BF/...Is the most powerful protection device used in the main distribution network. The product applies special spark-gap of arc suppression method and is fit with precise discharge gas and special arc extinguish plate. It can break the arc into several arc segments after discharge and extinguish them even if high power frequency after current occurs. Then subsequent current can be restricted after the electrical wire discharges, further improving the running safety and continuity of the protected equipment. This kind of lightning surge protection device has a standard module width of 36 mm. It is mostly used in B level lightning protection area in main distribution system, especially serves as high energy lightning current discharge distance. It can be used with SVU2-BfSVU3-BM between 3+1 circuit protection of TT and N and PE, realizing the thunder stroke protection in I level thunder stroke area. The key characteristic of this kind of lightning arrestor is that it can eliminate power grid power frequency after-current as high as 50KA in the 230/400V low voltage distribution system. Its continuous operating voltage as high as 440V guarantees that it can be used in the power system whose operating voltage is higher than 230V/400V. However, special attention should be paid to its special installation requirements. When this product is installed outdoor, it should be placed in a cabinet that is fireproof, waterproof, anticorrosion, and also can endure the pressure produced when discharging.
Project parameters | Level specifications |
| Model | SVU2-BF(Level 2 protection) |
| Pole | 1P\2P\1P+N\3P\3P+N\4P |
| Rated voltage Un(V) | 230/400 |
| Discharge current In(8/20μs) kA | 30 | 40 | 60 |
| Max discharge current Imax(8/20μs)kA | 60 | 80 | 100 |
| Max working voltage Uc(V) | 320 | 385 | 420 | 440 | 320 | 385 | 420 | 440 | 320 | 385 | 420 | 440 |
| Varistor voltage | 510 | 620 | 680 | 710 | 510 | 620 | 680 | 710 | 510 | 620 | 680 | 710 |
| Protection level Up kV | <2.0 | <2.2 | <2.2 | <2.4 | <2.2 | <2.5 | <2.5 | <2.7 | <2.5 | <2.7 | <3.0 | <3.2 |
| Response time(ns) | <25 |
| Leakage current 75% Uc 1mA | <20μA |
| Test classification | II |
| Protection grade | IP20 |
| Insulation case materials | PBT/PA66 |
| Flame retardant grade | V0 |
| Installation forms | 35mmStandard electrical guide |
| Shell color | Red/gray |
| Suggest the fuse or circuit breaker A | 40~63 |
| Phase line, zero line | 6~25Hard line |
| Ground | 6~25Double color line |
Wuhan Laurel Import and Export Co., Ltd is a professional electrical products supplier with industrial electrical products and consumer electrical products design, production and sales. We mainly supply Low Voltage Electric( circuit breaker, contactors, fuse etc), Building & Construction Electric(wall switch,socket etc),Lighting Lamp, Electric Accessory(terminal, connector etc) and so on .
Taking "the science and technology as the forerunner, the quality as the life, the prestige as the purpose" as business philosophy, Formation of an experienced professional technical team, and introduces the domestic and international most advanced production equipment at the same time. In the exploration of the continuous development, the company products with delicate exterior, good performance and perfect after-sales service, and won the domestic and foreign customers with expert's consistent high praise.
