Disjuntor Schneider NSX250A

Visão geral do produto

The Schneider NSX250A is a 250A frame current rating product under the ComPacT NSX series of disjuntores em caixa moldada. Specifically designed for medium and low-voltage power distribution systems, it features high reliability, projeto modular, and digital characteristics, and is a key component of Schneider’s EcoStruxure power distribution solutions.

Parâmetros principais

Comparação de unidades de viagem

1️⃣ TMD (Thermomagnetic Trip Unit)

Princípio de funcionamento: Thermal elements (bimetallic strips) detect overloads, and electromagnetic elements detect short circuits.

Características: Estrutura simples, baixo custo, narrow setting range (0.7~1In).

Aplicativo: General power distribution protection scenarios that do not require precise parameter adjustment.

2️⃣ Micrologic (Unidade de disparo eletrônico)

Princípio de funcionamento: Digital circuits perform monitoring and protection, providing multiple protection functions.

Características:

– Wide setting range (0.4~1In) and high accuracy (±15%).

– Provides maintenance information such as contact wear and operation count.

– Supports multiple protection functions: sobrecarga, short-circuit short delay, falha de terra, etc..

Aplicativo: Industrial and commercial power distribution that requires high protection accuracy and intelligent monitoring.

Cenários de aplicação

Sistemas de distribuição de energia industrial: Protection for mechanical equipment and production lines.

Edifícios Comerciais: Main circuits in shopping malls and office buildings.

Centros de dados: Power systems requiring high-reliability protection.

Distribuição de energia residencial: Main switches providing comprehensive protection.

Proteção do Gerador: Supported by special models (TM-G).

Principais vantagens

1. Alta confiabilidade: Adopts a double-rotating contact structure with a breaking capacity of up to 150kA to ensure system safety.
2. Projeto Modular:

– Multiple trip units optional to adapt to different load characteristics.

– Rich accessories: contatos auxiliares, contatos de alarme, dispositivos de disparo de derivação, etc..

– Mecanismo de operação elétrico (≥160A) suporta controle remoto.

3. Digital Characteristics:

– Electronic trip units provide precise protection and fault diagnosis.

– Supports integration with the Schneider EcoStruxure system to realize smart grid management.

Pontos de seleção

1. Seleção atual avaliada: ≥ Calculated load current and ≤ 250A.
2. Seleção de Capacidade de Quebra:

– General civil/commercial use: 36o (Tipo F) é suficiente.

– Ambientes industriais: 50o (Tipo N) or higher.

– Special occasions (por exemplo, usinas de energia): Consider 70-100kA (Type H/S).

3. Seleção da Unidade de Viagem:

– Simple power distribution: DTM (econômico).

– Cargas críticas: Micrológico (proteção inteligente).

4. Seleção do número do pólo:

– Three-phase equipment: 3P.

– Sistema trifásico de quatro fios: 4P.

Referência de Preço

TMD Type (36kA/50kA): Aproximadamente 1,600-2,500 RMB

Micrologic Type: Aproximadamente 2,500-5,000 RMB (depending on function complexity)

Resumo

The Schneider NSX250A circuit breaker is a high-performance and high-reliability medium-voltage power distribution protection device. It is suitable for various industrial and commercial scenarios and offers multiple options ranging from basic thermomagnetic protection to intelligent electronic protection. Ao selecionar, the appropriate model and configuration should be determined based on actual load characteristics, short-circuit current levels, and protection requirements。

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