Contactor,întrerupător de circuit,invertor solar,contor electric,senzor,Codificator,PLC
The following is a detailed technical analysis and application guide for Întrerupătoarele de circuit CC din seria NB1-63DC de la Chint. It is compiled in combination with official materials and industry standards, covering core performance, selection key points, and typical scenarios:
- Parametrii tehnici de bază
- Specificații de bază
| Articol | Parametru |
| Tensiune nominală | DC 250V, 500V, 1000V (Breaking capacity varies with voltage level) |
| Curent nominal | 1~63A (1P/2P/4P optional, Curba de declanșare: Type C 5-10In, Type D 10-14In) |
| Capacitate de rupere | – DC 250V: 10cel (Tip C) |
| – DC 500V: 8cel (Tip C) | |
| – DC 1000V: 6cel (Tip C) | |
| Metoda de stingere a arcului | Air arc extinguishing + magnetic blowout technology (Accelerates arc extinguishing through the magnetic field, suitable for DC highly inductive loads) |
| Caracteristici de declanșare | Protecție la suprasarcină: Inverse time-limit characteristic, în conformitate cu IEC 60947-2 standard. |
| Protecție la scurtcircuit: Declanșare instantanee, Tip C (5-10În), Tip D (10-14În) |
- Environmental and Mechanical Performance
| Articol | Parametru |
| Temperatura de operare | -35℃~+70℃ (Design larg de temperatură, adaptable to harsh environments) |
| Nivel de protecție | IP20 (Front protection) |
| Metoda de instalare | 35mm standard rail installation (Supports DIN EN 50022) |
| Specificații de cablare | Circuitul principal: 2.5~16mm² single-core/stranded wire (M4 screw) |
- Certificari si standarde
Certificari internationale: CCC, CE, EAC, TÜV, CB, SEMKO.
Standards Compliance: GB/T 14048.2, IEC 60947-2, RoHS environmental protection directive.
- Analysis of Key Features
- DC-specific Design
Arc Extinguishing Optimization: Adopts magnetic blowout arc extinguishing technology, which quickly stretches and cools the arc through the magnetic field to solve the problem of difficult arc extinguishing in DC circuits.
Protecție la polaritate: No built-in reverse connection protection, and anti-reverse connection function needs to be achieved through an external diode or MOS tube circuit.
- Intelligent Tripping and Protection
Protecție la suprasarcină: Bimetallic inverse time-limit tripping, the larger the current, cu atât timpul de declanșare este mai scurt (de exemplu: it will act within 2 minute la 1.5 ori mai mare decât curentul nominal).
Protecție la scurtcircuit: The electromagnetic trip unit responds instantaneously. Type C is suitable for conventional loads (such as LED lighting), and Type D is suitable for high-impact loads (precum motoarele).
- Funcții extinse
Contacte auxiliare: Supports external connection of OF (contact auxiliar) and SD (contact de alarmă) to achieve indication of opening and closing states or remote monitoring.
Compatibilitate cu accesorii: Can be equipped with shunt trip units (XF9), undervoltage trip units (MN), etc. for extended functions.
III. Selection and Application Scenarios
- Ghid de selecție
- Potrivirea tensiunii: Select the corresponding model according to the system voltage (de exemplu, choose NB1-63DC/500V for DC 500V).
- Current Calculation:
Continuous Load: Curent nominal ≥ 1.2 ori mai mare decât curentul de sarcină.
Sarcina de impact: Curba de declanșare de tip D, curent nominal ≥ (Load starting current / 10).
- Capacitate de rupere: Ensure that the breaking capacity (Icu) of the circuit breaker ≥ the system short-circuit current.
- Aplicații tipice
| Scenariu | Model Recommendation | Configuration Description |
| Photovoltaic String Protection | NB1-63DC/500V C16A | Suitable for 1500V photovoltaic systems (Needs to be derated for use), protects the string from overload and short-circuit |
| Energy Storage System | NB1-63DC/1000V D25A | High short-circuit breaking capacity, protects the battery pack and inverter interface |
| Industrial DC Motor | NB1-63DC/250V D32A | Curba de declanșare de tip D, can withstand the starting impact current of the motor |
| Communication Base Station | NB1-63DC/48V C6A | Low voltage and high reliability, protects the power supply of communication equipment |
- Instalare și întreținere
- Puncte cheie de instalare
Specificații de cablare: The main circuit wiring needs to be tightened to a torque of 6N·m to avoid loose connection and heat generation.
Polarity Confirmation: Connect the positive and negative poles strictly according to the markings to avoid damage to the circuit breaker due to reverse connection.
Cerințe de mediu: Avoid using in environments with high humidity (>90%RH) or corrosive gases.
- Sugestii de intretinere
Inspecție regulată: Clean the contacts every quarter and check the flexibility of the tripping mechanism.
Life Management: Durata de viata mecanica ≥ 200,000 ori, electrical life ≥ 100,000 ori (DC-21A load).
Depanarea erorilor: După ce se împiedică, confirm the cause of the fault, and manually disconnect the power supply before resetting.
- Comparație și soluții alternative
| Model | Gama de tensiune | Capacitate de rupere | Caracteristici |
| NB1-63DC | DC 250~1000V | 6~10kA | Magnetic blowout arc extinguishing, supports wide temperature environment, suitable for highly inductive loads |
| NB1Z-63 | AC/DC 220~400V | 6cel (AC) | Suitable for both AC and DC, an economical choice with lower breaking capacity |
| NSX400N(Schneider) | DC 1000V | 50cel | High short-circuit breaking capacity, suitable for large-scale energy storage systems, with a higher price |
- Precauții
- Derating for Use: When the ambient temperature exceeds 40℃, select the rated current according to derating 5% pentru fiecare creștere de 10℃.
- Short-circuit Withstand: The breaking capacity needs to match the system short-circuit current, otherwise it may lead to damage to the circuit breaker or the risk of fire.
- Modele alternative: If a higher breaking capacity is required, Chint’s NB1-63H (AC) or NB1-DC (DC-specific, breaking capacity 15kA) poate fi selectat.
For detailed technical manuals or customized solutions, poti vizita Chint’s official web siteor contact local technical support.
