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Este es un Schneider EZD series 400A frame size, 3-polo, 250Una corriente nominal, 36kA breaking capacity molded case circuit breaker. Its standard order number is EZD400E3250K. It is applied to overload and short-circuit protection in secondary power distribution systems, featuring cost performance and installation flexibility.
- Model Segment Definition
| Segmento de modelo | Significado | Descripción |
| EZD | Serie de productos | Schneider EasyPact EZD molded case circuit breaker series, designed for secondary power distribution, civil buildings and electromechanical markets |
| 400 | Marco actual | 400A frame size, maximum rated current up to 400A |
| mi | Clase de capacidad de ruptura | Class E, 36kA @ 400V AC, suitable for general industrial and civil building power distribution |
| 3PAG | Número de polo | 3-polo, sistema trifásico de tres hilos |
| 250A | Corriente nominal | Thermal-magnetic trip unit rated current 250A with fixed protection setting values |
| k | Tipo de montaje | tipo fijo / front connection (estándar); PK means plug-in type |
- Core Specification Parameter Table
| Categoría de parámetro | Especificación detallada | Observaciones |
| Parámetros básicos | ||
| Marca & Modelo | Schneider EZD400E3250K | Standard order number |
| Tensión nominal | 400V y (máx.. 690V y) | 50/60Hz |
| Tensión nominal de aislamiento | 1000V y | Cumple con IEC 60947-2 |
| Corriente nominal (En) | 250A | Thermal-magnetic trip TM250D |
| Número de polo | 3PAG | Trifásico de tres hilos. |
| Capacidad de ruptura (uci) | 36kA @ 400V AC | Class E breaking capacity |
| Características de protección | ||
| Tipo de unidad de disparo | Thermal-Magnetic (TMD) | Long time delay for overload + protección instantánea contra cortocircuitos |
| Protección contra sobrecarga | 1.05En: No tripping continuously | Cumple con IEC 60947-2 |
| 1.30En: Tripping within ≤1 hour | ||
| 6.00En: Tripping within ≤2 seconds | ||
| Protección contra cortocircuitos | Instant trip at ≥10In | Protect lines and equipment from overload and short-circuit damage |
| Mecánico & Parámetros de instalación | ||
| Tipo de montaje | Fijado (Estándar) / Plug-in optional | Upper/lower incoming line interchangeable without derating |
| Método de cableado | Cableado frontal (Estándar) | Rear wiring and plug-in wiring optional |
| Modo de operación | Operación manual (Handle) | Ergonomic design, labor-saving operation |
| Dimensión general (Ancho×Alto×Profundidad) | 140×255×110 mm | Standard dimension for 400A frame |
| Peso | Aprox.. 4.5 kilos | |
| Mounting Position | Vertical / Horizontal / Side / Rear | Performance unaffected by mounting position |
| Parámetros ambientales | ||
| Temperatura de funcionamiento | -5℃ ~ +40℃ | Derate above 40℃ |
| Temperatura de almacenamiento | -25℃ ~ +70℃ | |
| Grado de protección | IP30 (Solo cuerpo) | IP40 with protective cover |
| Proceso de dar un título | ||
| Cumplimiento de estándares | CEI 60947-2, ES 14048.2 | 3C Certificate No.: 2020980307… |
- Lista de accesorios (Compatible with EZD400 Series)
| Accessory Type | Modelo / Número de pedido. | Descripción de la función |
| Contacto auxiliar | EZ4OF101 (Single Auxiliary) | Indicate breaker ON/OFF status (DE), 1NO/1NC or 2NO/2NC |
| EZ4OF201 (Dual Auxiliary) | ||
| Alarm Contact | EZ4SD101 (Single Alarm) | Indicate breaker tripping status (SD), including fault and non-fault tripping |
| EZ4SD201 (Dual Alarm) | ||
| Viaje de derivación | EZ4SHT200ACDCZ (CA 220 V.) | Remote trip control, fire emergency trip application |
| EZ4SHT400ACZ (CA380V) | ||
| EZ4SHT048ACDCZ (CC 24 V) | ||
| Liberación de subtensión | EZ4MN200ACZ (CA 220 V.) | Automatic trip when voltage below set value, protect equipment from over/undervoltage damage |
| EZ4MN400ACZ (CA380V) | ||
| Extended Rotary Handle | EZ4H100 | Convenient door operation, suitable for distribution cabinet installation |
| Interphase Barrier | EZ4SP400 | Enhance interphase insulation and safety |
| Busbar | Dedicated busbar system | Suitable for multi-circuit outgoing lines, easy installation and neat layout |
| Plug-in Base | EZ4B400 | Adapt to plug-in mounting for easy maintenance and replacement |
- Alternativa & Comparación entre marcas
4.1 Schneider Internal Series Replacement
| Serie | Modelo | Capacidad de ruptura | Tipo de viaje | Gama de precios | Escenario de aplicación |
| EZD | EZD400E3250K | 36el | Thermal-Magnetic | Medio-bajo | General power distribution, prioridad de costos |
| CVS | CVS400N3250 | 50el | Thermal-Magnetic / Electrónico | Medio | Industrial distribution, higher breaking capacity required |
| NSX | NSX400N3250 | 50el / 70el | Electrónico (micrológico) | Alto | High-end distribution, precise protection and communication required |
4.2 Cross-Brand Competitor Comparison
| Marca | Modelo | Marco / Corriente nominal | Capacidad de ruptura | Price Ratio | Características |
| chint | NXM-400S/3300 250A | 400A / 250A | 36el | Acerca de 60% of EZD | Alternativa doméstica, rendimiento de alto costo |
| TEJIDO | Tmax T4N250 | 400A / 250A | 50el | Acerca de 120% of EZD | Strong breaking capacity, stable performance |
| siemens | 3VT400N250 | 400A / 250A | 36el | Acerca de 110% of EZD | Compatible with Siemens system, funciones de comunicación completas |
| Interruptor Changshu | CM3-400M/3300 250A | 400A / 250A | 36el | Acerca de 70% of EZD | High-quality domestic brand, buena compatibilidad |
- Puntos clave de selección & Soluciones alternativas
5.1 Core Selection Guidelines
Coincidencia de tipos de carga
Distribution Protection: EZD400E series (thermal-magnetic), suitable for lighting, socket and non-motor loads
Protección de motores: Recommend EZD400M series (motor protection type with higher short-circuit trip multiple)
Protección de corriente residual: Adopt VigiEZD400E series with integrated residual current protection
Breaking Capacity Selection
36el (Class E): industrias generales & civil buildings with low short-circuit current
50el (Class M): Industrial environments with high short-circuit current, such as near inverters and large motors
Calculation Rule: Select proper breaking capacity based on system short-circuit current calculation
Mounting Type Decision
Fixed Type: Bajo costo, for circuits without frequent replacement
Tipo de complemento: Fácil mantenimiento, for important circuits requiring quick replacement (data center, hospital)
5.2 Recommended Alternative Solutions
| Guión | Recommended Solution | Ventajas |
| Budget Limited, General Distribution | Chint NXM-400S/3300 250A | Precio bajo, meets basic performance requirements |
| High Breaking Capacity Required (50el) | Schneider CVS400N3250 | Same-brand upgrade, installation dimension compatible, mayor capacidad de rotura |
| Protección precisa & Communication Needed | Schneider NSX400N3250 + micrológico 2.3 | Electronic trip with adjustable parameters, support Modbus communication |
| Residual Current Protection Needed | VigiEZD400E3250K | Protección de corriente residual integrada, save space without extra module |
| Remote Control Needed | EZD400E3250K + Viaje de derivación + Contacto auxiliar | Realize remote tripping and status monitoring, fit intelligent distribution system |
- Key Operation Precautions
- Derating Application: Derate rated current by 1% per 1℃ above 40℃; reducir por 0.5% per 100m altitude over 1000m.
- Especificación de cableado: Follow top-in bottom-out rule; fasten terminals to avoid overheating. 3P for three-phase three-wire; select 4P if neutral protection is needed.
- Instalación de accesorios: Auxiliary/alarm contacts, shunt/undervoltage releases can be field-installed; cut off power before installation for safety.
- Ciclo de mantenimiento: Inspect every 6 months including appearance, mechanism flexibility and terminal tightness.
- Manejo de fallas: después de tropezar, identify cause (overload/short-circuit), eliminate fault then close again.
Complete Model List of Schneider EZD Series Circuit Breakers
Overview: The EZD series covers 5 frame sizes (100A/160A/250A/400A/630A), 3 breaking classes (E=25kA, N=36kA, M=50kA), 2 pole types (3P/4P), 2 trip types (TMD thermal-magnetic / ETU electronic; electronic only for 630A frame), 2 mounting types (Fixed N / Plug-in PK), plus residual current type (VigiEZD) and motor protection type (MAMÁ) variants.
- Regla de nomenclatura del modelo (Básico)
| Segmento de modelo | Significado | Optional Value | Descripción |
| EZD | Serie de productos | EZD | EasyPact EZD molded case circuit breaker series |
| 100/160/250/400/630 | Marco actual | 100/160/250/400/630 | Maximum rated current capacity |
| E/N/M | Capacidad de ruptura | mi(25el), norte(36el), METRO(50el) | Ultimate breaking capacity @400V AC |
| 3-4 | Número de polo | 3(3PAG), 4(4PAG) | 3P=3-phase 3-wire; 4P=3-phase 4-wire |
| 0XX/XX0 | Corriente nominal | 15~630A | Rated current of thermal-magnetic trip unit |
| N/PK | Tipo de montaje | norte(Fijado), PK(Complemento) | Fixed as standard; PK for plug-in |
| MAMÁ | Tipo de aplicación | MAMÁ(Protección de motores) | Non-MA for distribution protection |
| EL/ELA | Residual Current | EL(30mamá), ELA(300mamá) | Exclusive for VigiEZD series |
- Complete Model List by Frame Size
2.1 EZD100 Frame (máx.. 100A)
2.2 EZD160 Frame (máx.. 160A)
2.3 EZD250 Frame (máx.. 250A)
2.4 EZD400 Frame (máx.. 400A)
2.5 EZD630 Frame (máx.. 630A, with Electronic Trip)
- Residual Current Protected Type (VigiEZD Series)
- Key Selection Instructions
- Common Model Quick Reference (Distribution Protection)
- Accessory Compatibility Guide
