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This is a Schneider EZD series 400A frame size, 3-pôle, 250Un courant nominal, 36Capacité de coupure kA Disjoncteur à boîtier moulé. Son numéro de commande standard est EZD400E3250K. Il est appliqué à la protection contre les surcharges et les courts-circuits dans les systèmes de distribution d'énergie secondaire, offrant un rapport qualité-prix et une flexibilité d'installation.
- Model Segment Definition
| Segment de modèle | Signification | Description |
| EZD | Série de produits | Schneider EasyPact EZD molded case circuit breaker series, designed for secondary power distribution, civil buildings and electromechanical markets |
| 400 | Courant de trame | 400A frame size, maximum rated current up to 400A |
| E | Classe de capacité de coupure | Class E, 36kA @ 400V AC, suitable for general industrial and civil building power distribution |
| 3P. | Numéro de pôle | 3-pôle, système triphasé à trois fils |
| 250UN | Courant nominal | Thermal-magnetic trip unit rated current 250A with fixed protection setting values |
| K | Type de montage | Type fixe / front connection (standard); PK means plug-in type |
- Core Specification Parameter Table
| Catégorie de paramètre | Spécification détaillée | Remarques |
| Paramètres de base | ||
| Marque & Modèle | Schneider EZD400E3250K | Standard order number |
| Tension nominale | 400V et (Max.. 690V et) | 50/60Hz |
| Tension d'isolation nominale | 1000V et | Conforme à la CEI 60947-2 |
| Courant nominal (Dans) | 250UN | Thermal-magnetic trip TM250D |
| Numéro de pôle | 3P. | Three-phase three-wire |
| Capacité de coupure (ICU) | 36kA @ 400V AC | Class E breaking capacity |
| Caractéristiques de protection | ||
| Type de déclencheur | Thermal-Magnetic (TMD) | Long time delay for overload + instantaneous short-circuit protection |
| Protection contre les surcharges | 1.05Dans: No tripping continuously | Conforme à la CEI 60947-2 |
| 1.30Dans: Tripping within ≤1 hour | ||
| 6.00Dans: Tripping within ≤2 seconds | ||
| Protection contre les courts-circuits | Instant trip at ≥10In | Protect lines and equipment from overload and short-circuit damage |
| Mécanique & Paramètres d'installation | ||
| Type de montage | Fixé (Standard) / Plug-in optional | Upper/lower incoming line interchangeable without derating |
| Méthode de câblage | Front wiring (Standard) | Rear wiring and plug-in wiring optional |
| Mode de fonctionnement | Fonctionnement manuel (Handle) | Ergonomic design, labor-saving operation |
| Dimension globale (L×H×P) | 140×255×110 mm | Standard dimension for 400A frame |
| Poids | Environ. 4.5 kilos | |
| Mounting Position | Vertical / Horizontal / Side / Rear | Performance unaffected by mounting position |
| Paramètres environnementaux | ||
| Température de fonctionnement | -5℃ ~ +40℃ | Derate above 40℃ |
| Température de stockage | -25℃ ~ +70℃ | |
| Degré de protection | IP30 (Body only) | IP40 with protective cover |
| Attestation | ||
| Conformité aux normes | CEI 60947-2, FR 14048.2 | 3C Certificate No.: 2020980307… |
- Accessory List (Compatible with EZD400 Series)
| Type d'accessoire | Modèle / Numéro de commande. | Description de la fonction |
| Contact auxiliaire | EZ4OF101 (Single Auxiliary) | Indicate breaker ON/OFF status (OF), 1NO/1NC or 2NO/2NC |
| EZ4OF201 (Dual Auxiliary) | ||
| Contact d'alarme | EZ4SD101 (Single Alarm) | Indicate breaker tripping status (SD), including fault and non-fault tripping |
| EZ4SD201 (Dual Alarm) | ||
| Déclenchement de dérivation | EZ4SHT200ACDCZ (AC220V) | Remote trip control, fire emergency trip application |
| EZ4SHT400ACZ (AC380V) | ||
| EZ4SHT048ACDCZ (DC24V) | ||
| Libération de sous-tension | EZ4MN200ACZ (AC220V) | Automatic trip when voltage below set value, protect equipment from over/undervoltage damage |
| EZ4MN400ACZ (AC380V) | ||
| 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 |
- Alternative & Comparaison entre marques
4.1 Schneider Internal Series Replacement
| Série | Modèle | Capacité de coupure | Type de voyage | Gamme de prix | Scénario d'application |
| EZD | EZD400E3250K | 36le | Thermal-Magnetic | Moyen-Faible | General power distribution, priorité aux coûts |
| CVS | CVS400N3250 | 50le | Thermal-Magnetic / Électronique | Moyen | Industrial distribution, higher breaking capacity required |
| NSX | NSX400N3250 | 50le / 70le | Électronique (Micrologique) | Haut | High-end distribution, precise protection and communication required |
4.2 Cross-Brand Competitor Comparison
| Marque | Modèle | Cadre / Courant nominal | Capacité de coupure | Price Ratio | Caractéristiques |
| Chint | NXM-400S/3300 250A | 400UN / 250UN | 36le | À propos 60% of EZD | Alternative nationale, performance à coût élevé |
| ABB | Tmax T4N250 | 400UN / 250UN | 50le | À propos 120% of EZD | Strong breaking capacity, stable performance |
| Siemens | 3VT400N250 | 400UN / 250UN | 36le | À propos 110% of EZD | Compatible with Siemens system, complete communication functions |
| Commutateur Changshu | CM3-400M/3300 250A | 400UN / 250UN | 36le | À propos 70% of EZD | High-quality domestic brand, good compatibility |
- Points clés de la sélection & Solutions alternatives
5.1 Core Selection Guidelines
Correspondance du type de charge
Distribution Protection: EZD400E series (thermique-magnétique), adapté à l'éclairage, socket and non-motor loads
Protection du moteur: Recommend EZD400M series (motor protection type with higher short-circuit trip multiple)
Protection contre le courant résiduel: Adopt VigiEZD400E series with integrated residual current protection
Sélection du pouvoir de coupure
36le (Class E): General industrial & civil buildings with low short-circuit current
50le (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
Type fixe: Low cost, for circuits without frequent replacement
Plug-in Type: Easy maintenance, for important circuits requiring quick replacement (centre de données, hospital)
5.2 Recommended Alternative Solutions
| Scénario | Recommended Solution | Avantages |
| Budget Limited, General Distribution | Chint NXM-400S/3300 250A | Low price, meets basic performance requirements |
| High Breaking Capacity Required (50le) | Schneider CVS400N3250 | Same-brand upgrade, installation dimension compatible, pouvoir de coupure plus élevé |
| Precise Protection & Communication Needed | Schneider NSX400N3250 + Micrologique 2.3 | Electronic trip with adjustable parameters, support Modbus communication |
| Residual Current Protection Needed | VigiEZD400E3250K | Integrated residual current protection, save space without extra module |
| Remote Control Needed | EZD400E3250K + Déclenchement de dérivation + Contact auxiliaire | Realize remote tripping and status monitoring, fit intelligent distribution system |
- Key Operation Precautions
- Derating Application: Derate rated current by 1% per 1℃ above 40℃; derate by 0.5% per 100m altitude over 1000m.
- Spécification de câblage: Follow top-in bottom-out rule; fasten terminals to avoid overheating. 3P for three-phase three-wire; select 4P if neutral protection is needed.
- Installation des accessoires: Auxiliary/alarm contacts, shunt/undervoltage releases can be field-installed; cut off power before installation for safety.
- Cycle d'entretien: Inspectez chaque 6 months including appearance, mechanism flexibility and terminal tightness.
- Gestion des défauts: Après avoir trébuché, identify cause (overload/short-circuit), eliminate fault then close again.
Complete Model List of Schneider EZD Series Circuit Breakers
Aperçu: 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 (MA) variants.
- Règle de dénomination du modèle (Essentiel)
| Segment de modèle | Signification | Optional Value | Description |
| EZD | Série de produits | EZD | EasyPact EZD molded case circuit breaker series |
| 100/160/250/400/630 | Courant de trame | 100/160/250/400/630 | Maximum rated current capacity |
| E/N/M | Capacité de coupure | E(25le), N(36le), M.(50le) | Ultimate breaking capacity @400V AC |
| 3-4 | Numéro de pôle | 3(3P.), 4(4P.) | 3P=3-phase 3-wire; 4P=3-phase 4-wire |
| 0XX/XX0 | Courant nominal | 15~630A | Rated current of thermal-magnetic trip unit |
| N/PK | Type de montage | N(Fixé), PK(Plug-in) | Fixed as standard; PK for plug-in |
| MA | Application Type | MA(Protection du moteur) | Non-MA for distribution protection |
| EL/ELA | Courant résiduel | IL(30mA), ELA(300mA) | Exclusive for VigiEZD series |
- Complete Model List by Frame Size
2.1 EZD100 Frame (Max.. 100UN)
2.2 EZD160 Frame (Max.. 160UN)
2.3 EZD250 Frame (Max.. 250UN)
2.4 EZD400 Frame (Max.. 400UN)
2.5 EZD630 Frame (Max.. 630UN, with Electronic Trip)
- Residual Current Protected Type (VigiEZD Series)
- Key Selection Instructions
- Common Model Quick Reference (Distribution Protection)
- Accessory Compatibility Guide
