Dispositivo di protezione da sovratensione Chint NXU-ⅡG-40kA/275V

Chint Surge Protector NXU-40/275 (i.e., 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:

1. Parametri tecnici e prestazioni
2. Core Indicators

Massima tensione operativa continua (Uc): 275V e, suitable for 220V/230V standard power grids.

Corrente di scarica massima (Imax): 40IL (8/20forma d'onda μs), nominal discharge current (In) is 20kA, capable of withstanding multiple surge impacts.

Livello di protezione della tensione (Su): ≤1,5 kV, 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 (monofase) configuration, adopts 35mm guide rail installation, and the modular design allows plug-in replacement of protection modules without rewiring.

2. Safety Certifications

– Conforme alla norma IEC/EN 61643-11 e GB/T 18802.11 standard, and has passed CQC, CE, e certificazioni 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.

1. Scenari applicativi e consigli di installazione
2. Ambito di applicazione

Household Protection: Installed at the secondary distribution position of the distribution box to protect household appliances such as air conditioners, frigoriferi, 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, convertitori di frequenza) 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.

2. Installation Points

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.

Requisiti di messa a terra: 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

1. Monitoraggio dello stato

– 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.

2. Lifespan and Replacement Cycle

– The service life is about 5-8 anni in condizioni di utilizzo normale. If it frequently encounters high-current surges (such as direct lightning strikes), it needs to be evaluated for replacement in advance.

– Durante la sostituzione, only need to pull out the old module and insert a new module of the same specification, without professional tools.

1. Purchase and Price Reference
2. Channels and Prices

Mercato internazionale: Purchases can be made through Whatsapp: 0086-13811255435

2. 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.

1. Precauzioni
2. Adattabilità ambientale

– The operating temperature range is -40℃~+70℃, and humidity ≤95% (nessuna condensa), 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.

2. Raccomandazioni per la selezione

– If the grid voltage fluctuates greatly (such as in remote areas), the Uc=320V model can be selected; for industrial scenarios, it is recommended to match the NXU-ⅡG-F series with remote signaling contacts to realize remote status monitoring.

1. Typical Troubleshooting

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.