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This is a Schneider EZD series 400Eine Rahmengröße, 3-Pole, 250Ein Nennstrom, 36kA-Ausschaltvermögen Kompaktleistungsschalter. Die Standardbestellnummer lautet EZD400E3250K. Es wird zum Überlast- und Kurzschlussschutz in sekundären Stromverteilungssystemen eingesetzt, mit Kostenleistung und Installationsflexibilität.
- Model Segment Definition
| Modellsegment | Bedeutung | Beschreibung |
| EZD | Produktserie | Schneider EasyPact EZD molded case circuit breaker series, Entwickelt für die sekundäre Stromverteilung, civil buildings and electromechanical markets |
| 400 | Rahmenstrom | 400Eine Rahmengröße, maximum rated current up to 400A |
| E | Schaltleistungsklasse | Class E, 36kA @ 400V AC, suitable for general industrial and civil building power distribution |
| 3P | Polzahl | 3-Pole, three-phase three-wire system |
| 250A | Nennstrom | Thermal-magnetic trip unit rated current 250A with fixed protection setting values |
| K | Montageart | Fester Typ / front connection (Standard); PK means plug-in type |
- Core Specification Parameter Table
| Parameterkategorie | Detaillierte Spezifikation | Bemerkungen |
| Grundparameter | ||
| Marke & Modell | Schneider EZD400E3250K | Standard order number |
| Nennspannung | 400V und (Max. 690V und) | 50/60Hz |
| Bemessungsisolationsspannung | 1000V und | Konform mit IEC 60947-2 |
| Nennstrom (In) | 250A | Thermal-magnetic trip TM250D |
| Polzahl | 3P | Dreiphasiger Dreileiter |
| Bruchkapazität (Icu) | 36kA @ 400V AC | Class E breaking capacity |
| Schutzeigenschaften | ||
| Art der Auslöseeinheit | Thermal-Magnetic (TMD) | Long time delay for overload + instantaneous short-circuit protection |
| Überlastschutz | 1.05In: No tripping continuously | Konform mit IEC 60947-2 |
| 1.30In: Tripping within ≤1 hour | ||
| 6.00In: Tripping within ≤2 seconds | ||
| Kurzschlussschutz | Instant trip at ≥10In | Protect lines and equipment from overload and short-circuit damage |
| Mechanisch & Installationsparameter | ||
| Montageart | Behoben (Standard) / Plug-in optional | Upper/lower incoming line interchangeable without derating |
| Verkabelungsmethode | Vordere Verkabelung (Standard) | Rear wiring and plug-in wiring optional |
| Betriebsmodus | Manueller Betrieb (Handle) | Ergonomic design, labor-saving operation |
| Gesamtdimension (B×H×T) | 140×255×110 mm | Standard dimension for 400A frame |
| Gewicht | Ca. 4.5 kg | |
| Mounting Position | Vertikal / Horizontal / Side / Hinteren | Performance unaffected by mounting position |
| Umgebungsparameter | ||
| Betriebstemperatur | -5℃ ~ +40℃ | Derate above 40℃ |
| Lagertemperatur | -25℃ ~ +70℃ | |
| Schutzgrad | IP30 (Body only) | IP40 with protective cover |
| Zertifizierung | ||
| Standardkonformität | IEC 60947-2, GB 14048.2 | 3C Certificate No.: 2020980307… |
- Accessory List (Compatible with EZD400 Series)
| Zubehörtyp | Modell / Bestell-Nr. | Funktionsbeschreibung |
| Hilfskontakt | EZ4OF101 (Single Auxiliary) | Indicate breaker ON/OFF status (OF), 1NO/1NC or 2NO/2NC |
| EZ4OF201 (Dual Auxiliary) | ||
| Alarmkontakt | EZ4SD101 (Single Alarm) | Indicate breaker tripping status (SD), including fault and non-fault tripping |
| EZ4SD201 (Dual Alarm) | ||
| Shunt-Trip | EZ4SHT200ACDCZ (AC220V) | Remote trip control, fire emergency trip application |
| EZ4SHT400ACZ (AC380V) | ||
| EZ4SHT048ACDCZ (DC24V) | ||
| Unterspannungsauslöser | 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 & Cross-Brand Comparison
4.1 Schneider Internal Series Replacement
| Serie | Modell | Bruchkapazität | Reisetyp | Preisklasse | Anwendungsszenario |
| EZD | EZD400E3250K | 36Die | Thermal-Magnetic | Mittel-Niedrig | General power distribution, Kostenpriorität |
| CVS | CVS400N3250 | 50Die | Thermal-Magnetic / Elektronisch | Medium | Industrial distribution, higher breaking capacity required |
| NSX | NSX400N3250 | 50Die / 70Die | Elektronisch (Mikrologisch) | Hoch | High-end distribution, precise protection and communication required |
4.2 Cross-Brand Competitor Comparison
| Marke | Modell | Rahmen / Nennstrom | Bruchkapazität | Price Ratio | Merkmale |
| Chint | NXM-400S/3300 250A | 400A / 250A | 36Die | Um 60% of EZD | Inländische Alternative, hohe Kostenleistung |
| ABB | Tmax T4N250 | 400A / 250A | 50Die | Um 120% of EZD | Strong breaking capacity, stable performance |
| Siemens | 3VT400N250 | 400A / 250A | 36Die | Um 110% of EZD | Compatible with Siemens system, complete communication functions |
| Changshu-Schalter | CM3-400M/3300 250A | 400A / 250A | 36Die | Um 70% of EZD | High-quality domestic brand, good compatibility |
- Wichtige Auswahlpunkte & Alternative Lösungen
5.1 Core Selection Guidelines
Load Type Matching
Distribution Protection: EZD400E series (thermal-magnetic), zur Beleuchtung geeignet, socket and non-motor loads
Motorschutz: Recommend EZD400M series (motor protection type with higher short-circuit trip multiple)
Fehlerstromschutz: Adopt VigiEZD400E series with integrated residual current protection
Breaking Capacity Selection
36Die (Class E): Allgemeine Industrie & civil buildings with low short-circuit current
50Die (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
Fester Typ: Low cost, for circuits without frequent replacement
Plug-in-Typ: Einfache Wartung, for important circuits requiring quick replacement (data center, hospital)
5.2 Recommended Alternative Solutions
| Szenario | Recommended Solution | Vorteile |
| Budget Limited, General Distribution | Chint NXM-400S/3300 250A | Low price, meets basic performance requirements |
| High Breaking Capacity Required (50Die) | Schneider CVS400N3250 | Upgrade der gleichen Marke, installation dimension compatible, höhere Bruchkapazität |
| Präziser Schutz & Communication Needed | Schneider NSX400N3250 + Mikrologisch 2.3 | Electronic trip with adjustable parameters, support Modbus communication |
| Residual Current Protection Needed | VigiEZD400E3250K | Integrierter Fehlerstromschutz, save space without extra module |
| Remote Control Needed | EZD400E3250K + Shunt-Trip + Hilfskontakt | 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.
- Verkabelungsspezifikation: Follow top-in bottom-out rule; fasten terminals to avoid overheating. 3P for three-phase three-wire; select 4P if neutral protection is needed.
- Accessory Installation: Auxiliary/alarm contacts, shunt/undervoltage releases can be field-installed; cut off power before installation for safety.
- Wartungszyklus: Inspect every 6 months including appearance, mechanism flexibility and terminal tightness.
- Fehlerbehandlung: Nach dem Stolpern, 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 (MA) variants.
- Modellbenennungsregel (Essentiell)
| Modellsegment | Bedeutung | Optional Value | Beschreibung |
| EZD | Produktserie | EZD | EasyPact EZD molded case circuit breaker series |
| 100/160/250/400/630 | Rahmenstrom | 100/160/250/400/630 | Maximum rated current capacity |
| E/N/M | Bruchkapazität | E(25Die), N(36Die), M(50Die) | Ultimate breaking capacity @400V AC |
| 3-4 | Polzahl | 3(3P), 4(4P) | 3P=3-phase 3-wire; 4P=3-phase 4-wire |
| 0XX/XX0 | Nennstrom | 15~630A | Rated current of thermal-magnetic trip unit |
| N/PK | Montageart | N(Behoben), PK(Plug-in) | Fixed as standard; PK for plug-in |
| MA | Anwendungstyp | MA(Motorschutz) | Non-MA for distribution protection |
| EL/ELA | Residual Current | EL(30mA), ELA(300mA) | Exclusive for VigiEZD series |
- Vollständige Modellliste nach Rahmengröße
2.1 EZD100 Frame (Max. 100A)
2.2 EZD160 Frame (Max. 160A)
2.3 EZD250 Frame (Max. 250A)
2.4 EZD400 Frame (Max. 400A)
2.5 EZD630 Frame (Max. 630A, with Electronic Trip)
- Residual Current Protected Type (VigiEZD Series)
- Key Selection Instructions
- Common Model Quick Reference (Distribution Protection)
- Accessory Compatibility Guide
