Chint NXB63-3P-D63 circuit breaker

The Chint NXB63-3P-D63 interruttore automatico is a three-phase miniature circuit breaker (MCB) designed for high-load scenarios. It is suitable for circuits with an alternating current of 50/60Hz and a rated voltage of 400V AC, providing overload, protezione da cortocircuito, e funzioni di isolamento. Below is an analysis of its core information:

1. Parametri e funzioni principaliContattore CA Chint NXC-75/220 V
2. Specification FeaturesContattore CC Chint NC1-5011-36V

Poli: 3P (trifase), adatto per sistemi di distribuzione elettrica trifase a quattro fili.

Corrente nominale: 63UN, matching the continuous operation requirements of high-power equipment (per esempio., motori, trasformatori).

Trip Characteristic: Curva di tipo D, with an instantaneous trip current of 10–16 times the rated current, effectively handling inrush currents during motor starting.

Capacità di interruzione: 6IL, safely interrupting short-circuit fault currents to prevent contact welding or equipment damage.

2. Technical Standards

– Conforme all'IEC 60898-1 (internazionale) e GB/T 10963.1 (Cina) standard, and is 3C certified.

– Intervallo di temperatura operativa: -35°C to 70°C, adapting to temperature fluctuations in industrial environments.

1. Scenari applicativi

Industrial Sector: Motor control, power distribution for production line equipment. The Type D trip characteristic avoids frequent false tripping.

Commercial and Residential Use: Main switches or branch protection in three-phase power supply systems, such as power distribution in shopping malls and factories.

Special Scenarios: Equipment requiring high short-circuit protection (per esempio., welding machines, trasformatori), enabling rapid response to fault currents.

III. Installation and Usage Recommendations

1. Requisiti di installazione

– Must be installed by a professional electrician, vertically mounted on a standard 35mm rail, ensuring wiring screws are tightened to prevent loosening and heat generation.

– Use wires with appropriate cross-sectional area (per esempio., 6mm² copper wire) and reserve sufficient operating space during wiring.

2. Maintenance and Precautions

– Regularly inspect contacts and terminal blocks to avoid poor contact due to oxidation or looseness.

– If tripping occurs frequently, check whether the load exceeds the rated current or if a short-circuit fault exists.

1. Price and Market Positioning

Prezzo di riferimento: More cost-effective than similar imported brands (per esempio., Siemens EA9 series).

Posizionamento: As an upgraded version of the DZ47 series, the NXB-63 improves breaking capacity and reliability, suitable for cost-sensitive scenarios requiring high protection performance.

1. Comparison with Siemens Equivalent Products

Capacità di interruzione: The Siemens EA9AN3C63 has a breaking capacity of 6kA, comparable to the NXB-63, but its price is typically 30–50% higher.

Caratteristiche del viaggio: Siemens Type D curve products (per esempio., 5SJ6 series) have an instantaneous trip multiple of 10–14 times, close to the NXB-63’s 10–16 times, both suitable for motor protection.

Certificazioni: Siemens products are usually UL-certified, while the NXB-63 does not explicitly mention North American certifications. U.S. users are advised to prioritize models with UL marks.

1. Precauzioni

Corrispondenza della tensione: The 3P model has a rated voltage of 400V AC and cannot be used in single-phase 230V circuits.

Certification Compliance: For use in the U.S., verify whether the product is UL-certified or choose other models compliant with North American standards (per esempio., Siemens 5SJ6 series).

Technical Parameters of Chint NXB63-3P-D63 Circuit Breaker

(Compiled from official data and industry standards)

1. Parametri elettrici principali
2. Tensione nominale: CA 400 V (three-phase system), suitable for 380V/400V power distribution scenarios; not for single-phase 230V circuits.
3. Corrente nominale: 63UN, matching continuous operation of high-power equipment (per esempio., motori, trasformatori).
4. Trip Characteristic: Curva di tipo D, instantaneous trip current 10–16× rated current, effectively handling motor starting inrush currents.
5. Capacità di interruzione: 6IL (conforme alla CEI 60898-1), safely interrupting short-circuit fault currents.
6. Mechanical and Environmental Parameters
7. Poli: 3P (trifase), adatto per sistemi di distribuzione elettrica trifase a quattro fili.
8. Vita meccanica: 20,000 operazioni; Vita elettrica: 10,000 operazioni, ensuring long-term stable operation.
9. Temperatura operativa: -35°C fino a +70°C, adapting to industrial temperature fluctuations.
10. Metodo di installazione: Standard 35mm rail mounting, requiring vertical fixation for heat dissipation and operational stability.

III. Certificazioni e Conformità

1. Certificazione nazionale: 3C certified (Certificate No. 2020980307001645), compliant with GB/T 10963.1.
2. Standard internazionali: Compliant with IEC 60898-1, but not explicitly UL-certified. North American users should prioritize models with UL marks (per esempio., Siemens 5SJ6 series).
3. Accessories and Extended Functions
4. Contatti ausiliari: Supports accessories like AX-X1 (1NA+1NC), MX+OF (shunt trip + contatto ausiliario) for remote control and status feedback.
5. Wiring Terminals: Threaded pressure plate terminals recommended for 6mm² copper wire (for 63A load), with a tightening torque of 2.0N·m to avoid heat generation.
6. Dimensions and Installation Size

Dimensioni: Approximately 90mm (W) × 75mm (H) × 85mm (D), subject to the official manual.

Wiring Space: Riservare spazio sufficiente; recommended wire cross-sectional area: 1–25mm² (selected by load current).

1. Note
2. Corrispondenza della tensione: Only for 400V three-phase systems; not for single-phase 230V circuits.
3. Protezione da sovraccarico: Frequent tripping indicates checking whether the load exceeds the rated current or a short circuit exists.
4. North American Market: Not UL-certified; recommend Siemens 5SJ6 or other North American-compliant models.

For complete technical manuals or customized parameters, visit Chint Electric’s official website or contact a supplier. For North American applications, ensure product compliance to avoid safety risks.