คอนแทคเตอร์,เบรกเกอร์,อินเวอร์เตอร์พลังงานแสงอาทิตย์,มิเตอร์ไฟฟ้า,แบตเตอรี่พลังงานแสงอาทิตย์
Chint Surge Protector NXU-40/275 (เช่น., model NXU-ⅡG-40kA/275V) is a surge protection device specially designed for low-voltage distribution systems, suitable for household, commercial and industrial scenarios. The following is its core information and application guidelines:
- พารามิเตอร์ทางเทคนิคและประสิทธิภาพ
- Core Indicators
แรงดันไฟฟ้าใช้งานต่อเนื่องสูงสุด (UC): 275วีและ, suitable for 220V/230V standard power grids.
Maximum Discharge Current (Imax): 40ที่ (8/20รูปคลื่น µs), nominal discharge current (ใน) is 20kA, capable of withstanding multiple surge impacts.
ระดับการป้องกันแรงดันไฟฟ้า (ขึ้น): ≤1.5kV, which can limit the instantaneous overvoltage within the safe range of equipment, significantly lower than the tolerance threshold of most household appliances and electronic devices (usually ≥2kV).
Pole Number and Installation: Supports 2P (single-phase) configuration, adopts 35mm guide rail installation, and the modular design allows plug-in replacement of protection modules without rewiring.
- Safety Certifications
– สอดคล้องกับ IEC/EN 61643-11 และ GB/T 18802.11 มาตรฐาน, and has passed CQC, ซีอี, และใบรับรอง CB, suitable for most markets around the world.
– Built-in thermal trip and short-circuit protection mechanisms, which automatically disconnect the circuit in case of failure to avoid fire risks.
- สถานการณ์การใช้งานและคำแนะนำในการติดตั้ง
- ขอบเขตการใช้งาน
Household Protection: Installed at the secondary distribution position of the distribution box to protect household appliances such as air conditioners, ตู้เย็น, and TVs, especially suitable for areas with frequent thunderstorms.
Commercial and Industrial: Used in office and shopping mall distribution systems, or at the front end of industrial equipment (such as PLC, เครื่องแปลงความถี่) to resist lightning strikes and operating overvoltages generated by equipment start-up and shutdown.
Photovoltaic Systems: Can protect inverters and components, reducing damage to new energy equipment caused by lightning strikes.
- จุดติดตั้ง
Location Selection: Close to the power supply incoming end of the protected equipment, with a wiring length of ≤1.5 meters to reduce the impact of line inductance on protection effects.
ข้อกำหนดการต่อลงดิน: The grounding wire diameter is ≥4mm², length ≤5 meters, and grounding resistance <4Ω to ensure that surge energy is quickly discharged into the ground.
Cooperating with Circuit Breakers: A 10-16A circuit breaker needs to be connected in series at the front end to prevent fire caused by SPD short circuits.
III. Maintenance and Replacement
- การตรวจสอบสถานะ
– The surface of the module is equipped with a degradation indicator window, which is green when normal and pops up a red warning after failure, requiring immediate replacement.
– It is recommended to check the indicator lights and wiring terminals quarterly, and focus on testing the grounding system before the thunderstorm season.
- Lifespan and Replacement Cycle
– The service life is about 5-8 ปีภายใต้การใช้งานปกติ. If it frequently encounters high-current surges (such as direct lightning strikes), it needs to be evaluated for replacement in advance.
– เมื่อเปลี่ยน, only need to pull out the old module and insert a new module of the same specification, without professional tools.
- Purchase and Price Reference
- ช่องทางและราคา
ตลาดต่างประเทศ: Purchases can be made through Whatsapp: 0086-13811255435
- Description of Alternative Models
– The NXU-ⅡG series is an upgraded version of the previous NU6-II, with significant optimizations in response speed (<25ns), impact resistance times (≥20 times In), and heat dissipation design.
- ข้อควรระวัง
- การปรับตัวด้านสิ่งแวดล้อม
– The operating temperature range is -40℃~+70℃, and humidity ≤95% (ไม่มีการควบแน่น), suitable for harsh environments such as high temperature and high humidity.
– Avoid installation in areas with strong electromagnetic interference, and keep away from inductive loads (such as large motors) to reduce false triggers.
- คำแนะนำในการคัดเลือก
– If the grid voltage fluctuates greatly (such as in remote areas), the Uc=320V model can be selected; สำหรับสถานการณ์ทางอุตสาหกรรม, it is recommended to match the NXU-ⅡG-F series with remote signaling contacts to realize remote status monitoring.
- Typical Troubleshooting
| ปรากฏการณ์ความผิดปกติ | สาเหตุที่เป็นไปได้ | โซลูชั่น |
| Indicator light turns red | Module degradation or short circuit | Replace the module after power off and check the front circuit breaker |
| Frequent misoperation | Poor grounding or electromagnetic interference | Re-lay the grounding wire and add shielding measures |
| Equipment still damaged after protection | Excessively high voltage protection level | Upgrade to a model with Up≤1.2kV (such as NXU-ⅡG-65) |
Through reasonable selection and standardized installation, NXU-40/275 can effectively improve the stability of the electrical system and reduce the risk of equipment damage caused by surges. It is recommended to formulate a hierarchical protection scheme (such as primary + secondary + tertiary combination) according to local power grid characteristics and equipment requirements to achieve comprehensive protection.
