Chint's NB1-63DC series DC circuit breakers - Contattore,interruttore automatico,inverter solare,contatore elettrico,sensore,Codificatore,PLC

The following is a detailed technical analysis and application guide for Interruttori automatici CC serie NB1-63DC di Chint. It is compiled in combination with official materials and industry standards, covering core performance, selection key points, and typical scenarios:

Parametri tecnici fondamentali
Specifiche di base

Articolo	Parametro
Tensione nominale	CC 250 V, 500V, 1000V (Breaking capacity varies with voltage level)
Corrente nominale	1~63A (1P/2P/4P optional, Curva di intervento: Type C 5-10In, Type D 10-14In)
Capacità di interruzione	– CC 250 V: 10IL (Tipo C)
	– CC 500 V: 8IL (Tipo C)
	– CC 1000 V: 6IL (Tipo C)
Metodo di estinzione dell'arco	Air arc extinguishing + magnetic blowout technology (Accelerates arc extinguishing through the magnetic field, suitable for DC highly inductive loads)
Caratteristiche di intervento	Protezione da sovraccarico: Inverse time-limit characteristic, in linea con la CEI 60947-2 standard.
Caratteristiche di intervento	Protezione da cortocircuito: Intervento istantaneo, Tipo C (5-10In), Tipo D (10-14In)

Environmental and Mechanical Performance

Articolo	Parametro
Temperatura operativa	-35℃~+70℃ (Wide temperature design, adaptable to harsh environments)
Livello di protezione	IP20 (Front protection)
Metodo di installazione	35mm standard rail installation (Supports DIN EN 50022)
Specifiche di cablaggio	Circuito principale: 2.5~16mm² single-core/stranded wire (M4 screw)

Certificazioni e standard

Certificazioni Internazionali: CCC, CE, EAC, TÜV, CB, SEMKO.

Conformità agli standard: GB/T 14048.2, CEI 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.

Protezione dalla polarità: 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

Protezione da sovraccarico: Bimetallic inverse time-limit tripping, the larger the current, minore è il tempo di intervento (Per esempio: it will act within 2 minuti a 1.5 volte la corrente nominale).

Protezione da cortocircuito: The electromagnetic trip unit responds instantaneously. Il tipo C è adatto per carichi convenzionali (such as LED lighting), and Type D is suitable for high-impact loads (come i motori).

Funzioni estese

Contatti ausiliari: Supports external connection of OF (contatto ausiliario) and SD (contatto di allarme) to achieve indication of opening and closing states or remote monitoring.

Compatibilità degli accessori: Can be equipped with shunt trip units (XF9), undervoltage trip units (MN), ecc. for extended functions.

III. Selection and Application Scenarios

Guida alla selezione
Corrispondenza della tensione: Select the corresponding model according to the system voltage (Per esempio, choose NB1-63DC/500V for DC 500V).
Current Calculation:

Continuous Load: Corrente nominale ≥ 1.2 volte la corrente di carico.

Impact Load: Curva di intervento di tipo D, corrente nominale ≥ (Load starting current / 10).

Capacità di interruzione: Ensure that the breaking capacity (terapia intensiva) of the circuit breaker ≥ the system short-circuit current.
Applicazioni tipiche

Scenario	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	Curva di intervento di tipo 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

Installazione e manutenzione
Punti chiave dell'installazione

Specifiche di cablaggio: 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.

Requisiti ambientali: Avoid using in environments with high humidity (>90%RH) or corrosive gases.

Suggerimenti per la manutenzione

Ispezione regolare: Clean the contacts every quarter and check the flexibility of the tripping mechanism.

Life Management: Vita meccanica ≥ 200,000 volte, electrical life ≥ 100,000 volte (DC-21A load).

Risoluzione dei problemi: Dopo essere inciampato, confirm the cause of the fault, and manually disconnect the power supply before resetting.

Comparison and Alternative Solutions

Modello	Intervallo di tensione	Capacità di interruzione	Caratteristiche
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	6IL (AC)	Suitable for both AC and DC, an economical choice with lower breaking capacity
NSX400N(Schneider)	CC 1000 V	50IL	High short-circuit breaking capacity, suitable for large-scale energy storage systems, with a higher price

Precauzioni
Derating for Use: When the ambient temperature exceeds 40℃, select the rated current according to derating 5% per ogni aumento di 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.
Modelli alternativi: If a higher breaking capacity is required, Chint’s NB1-63H (AC) or NB1-DC (DC-specific, breaking capacity 15kA) può essere selezionato.