Chint Air Switch NXB63-3P/D32 circuit breaker

Chint Air Switch NXB63-3P/D32 is a three-pole miniature Leistungsschalter suitable for industrial and commercial scenarios, mainly used for overload protection, short-circuit protection and circuit isolation. The following is a collation of its core information:

1. Model Parsing and Technical Parameters

Model Meaning:

NXB-63: Chint NXB series miniature circuit breaker with a frame current of 63A.

3P: Three-pole design, suitable for three-phase circuits (such as 400V systems).

D32: D-type tripping curve, rated current 32A, suitable for loads with high inrush current (wie Motoren).

Key Parameters:

Rated Voltage: 400V AC (3P specification), frequency 50Hz.

Breaking Capacity: 6kA (complies with IEC 60898-1 standard), capable of quickly cutting off short-circuit current.

Tripping Characteristic: D-type curve, suitable for equipment with large starting current, wie Motoren, transformers, etc.

Certification: Certified by CCC, CE, TUV, etc., but UL certification is not explicitly mentioned, so it may not be applicable to the North American market.

2. Anwendungsszenarien und Funktionen

Applicable Fields:

– Overload and short-circuit protection for industrial power distribution systems, commercial buildings and residential three-phase circuits.

– Particularly suitable for motor control circuits, as it can withstand the instantaneous high current during motor startup.

Core Functions:

Overload Protection: When the current exceeds the rated value, the bimetallic strip heats up and bends to trigger tripping.

Short-Circuit Protection: The electromagnetic tripping device quickly cuts off the circuit in case of a short circuit (response time < 0.1 seconds).

Isolation Function: After the handle is opened, the circuit can be safely maintained, meeting the requirements of electrical isolation.

3. Installation and Usage Notes

Installationsmethode:

– Standard 35mm guide rail installation, supporting DIN EN 60715 standard, with simple installation.

– The wiring method is top-in and bottom-out, and it is necessary to ensure that the cross-sectional area of the wire matches the current (for example, 32A is recommended to use 6mm² copper wire).

Environmental Requirements:

– Operating temperature range: -5℃ to +40℃, humidity ≤ 95%RH (no condensation).

– Avoid installation in environments with high temperature, humidity or corrosive gases.

Maintenance Suggestions:

– Regularly check the flexibility of the handle operation and the state of the contacts to ensure no ablation or oxidation.

– It is recommended to replace the circuit breaker after 10 years or 10,000 operations to ensure reliability.

4. Purchase and Market Applicability

International Market:

– This model has not explicitly obtained UL certification and may not comply with North American electrical standards (such as NEC).

– If American users need to use it, it is recommended to purchase through importers via Whatsapp: 0086-13811255435, but they need to confirm the compatibility and certification issues by themselves.

5. Suggestions for Alternative Solutions

Alternative Models for the North American Market:

– If UL certification is required, you can consider Chint’s NXB series variants designed for North America (such as NXB-63 3P D32 UL), or international brands such as Siemens 5SJ6 and ABB S203 series.

– Note that the commonly used voltage in North America is 120/240V, while NXB63-3P/D32 is a 400V specification, so direct use may require a transformer for voltage reduction.

6. Risk Tips

Compatibility Risks:

– Installation of non-UL certified products in the United States may violate local electrical regulations, leading to insurance claims rejection or safety hazards.

– Three-phase 400V equipment is incompatible with the North American single-phase 240V system, and a professional electrician is required to evaluate the transformation plan.