コンタクタ,サーキットブレーカー,ソーラーインバーター,電気メーター,太陽電池
これは Schneider EZD series 400A frame size, 3-ポール, 250定格電流, 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
| モデルセグメント | 意味 | 説明 |
| EZD | 製品シリーズ | Schneider EasyPact EZD molded case circuit breaker series, designed for secondary power distribution, civil buildings and electromechanical markets |
| 400 | フレーム電流 | 400A frame size, maximum rated current up to 400A |
| E | 遮断容量クラス | Class E, 36kA @ 400V AC, suitable for general industrial and civil building power distribution |
| 3P | 極数 | 3-ポール, three-phase three-wire system |
| 250あ | 定格電流 | Thermal-magnetic trip unit rated current 250A with fixed protection setting values |
| K | 取付タイプ | 固定式 / front connection (標準); PK means plug-in type |
- Core Specification Parameter Table
| パラメータのカテゴリ | 詳細仕様 | 備考 |
| 基本パラメータ | ||
| ブランド & モデル | Schneider EZD400E3250K | 標準注文番号 |
| 定格電圧 | 400Vと (マックス. 690Vと) | 50/60Hz |
| 定格絶縁電圧 | 1000Vと | IEC準拠 60947-2 |
| 定格電流 (で) | 250あ | Thermal-magnetic trip TM250D |
| 極数 | 3P | Three-phase three-wire |
| 遮断容量 (ICU) | 36kA @ 400V AC | Class E breaking capacity |
| Protection Characteristics | ||
| トリップユニットの種類 | Thermal-Magnetic (TMD) | Long time delay for overload + 瞬時短絡保護 |
| 過負荷保護 | 1.05で: No tripping continuously | IEC準拠 60947-2 |
| 1.30で: Tripping within ≤1 hour | ||
| 6.00で: Tripping within ≤2 seconds | ||
| Short-circuit Protection | Instant trip at ≥10In | Protect lines and equipment from overload and short-circuit damage |
| 機械式 & Installation Parameters | ||
| 取付タイプ | 修理済み (標準) / Plug-in optional | Upper/lower incoming line interchangeable without derating |
| 配線方法 | 前面配線 (標準) | Rear wiring and plug-in wiring optional |
| 動作モード | Manual operation (Handle) | Ergonomic design, labor-saving operation |
| Overall Dimension (幅×高さ×奥行き) | 140×255×110 mm | Standard dimension for 400A frame |
| 重さ | 約. 4.5 kg | |
| Mounting Position | Vertical / Horizontal / Side / Rear | Performance unaffected by mounting position |
| 環境パラメータ | ||
| 動作温度 | -5℃～+40℃ | Derate above 40℃ |
| 保管温度 | -25℃～+70℃ | |
| 保護等級 | IP30 (本体のみ) | IP40 with protective cover |
| 認証 | ||
| Standard Compliance | IEC 60947-2, GB 14048.2 | 3C Certificate No.: 2020980307… |
- Accessory List (Compatible with EZD400 Series)
| Accessory Type | モデル / 注文番号. | 機能の説明 |
| 補助接点 | EZ4OF101 (Single Auxiliary) | Indicate breaker ON/OFF status (の), 1NO/1NC or 2NO/2NC |
| EZ4OF201 (Dual Auxiliary) | ||
| 警報接点 | EZ4SD101 (Single Alarm) | Indicate breaker tripping status (SD), including fault and non-fault tripping |
| EZ4SD201 (Dual Alarm) | ||
| シャントトリップ | EZ4SHT200ACDCZ (AC220V) | Remote trip control, fire emergency trip application |
| EZ4SHT400ACZ (AC380V) | ||
| EZ4SHT048ACDCZ (DC24V) | ||
| 不足電圧解除 | 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 |
- 代替 & ブランド間の比較
4.1 Schneider Internal Series Replacement
| シリーズ | モデル | 遮断容量 | 旅行の種類 | 価格帯 | アプリケーションシナリオ |
| EZD | EZD400E3250K | 36の | Thermal-Magnetic | 中～低 | General power distribution, コスト優先 |
| CVS | CVS400N3250 | 50の | Thermal-Magnetic / 電子 | 中くらい | Industrial distribution, higher breaking capacity required |
| NSX | NSX400N3250 | 50の / 70の | 電子 (マイクロロジック) | 高い | High-end distribution, precise protection and communication required |
4.2 Cross-Brand Competitor Comparison
| ブランド | モデル | フレーム / 定格電流 | 遮断容量 | Price Ratio | 特徴 |
| チント | NXM-400S/3300 250A | 400あ / 250あ | 36の | について 60% of EZD | 国内代替品, high cost performance |
| ABB | Tmax T4N250 | 400あ / 250あ | 50の | について 120% of EZD | Strong breaking capacity, 安定したパフォーマンス |
| シーメンス | 3VT400N250 | 400あ / 250あ | 36の | について 110% of EZD | Compatible with Siemens system, complete communication functions |
| 常熟スイッチ | CM3-400M/3300 250A | 400あ / 250あ | 36の | について 70% of EZD | High-quality domestic brand, good compatibility |
- 選定のポイント & 代替ソリューション
5.1 Core Selection Guidelines
負荷タイプのマッチング
Distribution Protection: EZD400E series (thermal-magnetic), suitable for lighting, socket and non-motor loads
Motor Protection: Recommend EZD400M series (motor protection type with higher short-circuit trip multiple)
残留電流保護: Adopt VigiEZD400E series with integrated residual current protection
遮断容量の選択
36の (Class E): 一般産業用 & civil buildings with low short-circuit current
50の (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
固定式: 低コスト, for circuits without frequent replacement
プラグインタイプ: メンテナンスが簡単, for important circuits requiring quick replacement (data center, hospital)
5.2 Recommended Alternative Solutions
| シナリオ | Recommended Solution | 利点 |
| Budget Limited, General Distribution | Chint NXM-400S/3300 250A | Low price, meets basic performance requirements |
| High Breaking Capacity Required (50の) | Schneider CVS400N3250 | Same-brand upgrade, installation dimension compatible, より高い遮断容量 |
| Precise Protection & Communication Needed | Schneider NSX400N3250 + マイクロロジック 2.3 | Electronic trip with adjustable parameters, support Modbus communication |
| Residual Current Protection Needed | VigiEZD400E3250K | 統合された残留電流保護, save space without extra module |
| Remote Control Needed | EZD400E3250K + シャントトリップ + 補助接点 | Realize remote tripping and status monitoring, fit intelligent distribution system |
- Key Operation Precautions
- Derating Application: Derate rated current by 1% per 1℃ above 40℃; で軽減します 0.5% per 100m altitude over 1000m.
- 配線仕様: Follow top-in bottom-out rule; fasten terminals to avoid overheating. 3P for three-phase three-wire; select 4P if neutral protection is needed.
- 付属品の取り付け: Auxiliary/alarm contacts, shunt/undervoltage releases can be field-installed; cut off power before installation for safety.
- メンテナンスサイクル: Inspect every 6 months including appearance, mechanism flexibility and terminal tightness.
- 障害処理: つまずいた後, 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 (マ) variants.
- モデルの命名規則 (不可欠)
| モデルセグメント | 意味 | Optional Value | 説明 |
| EZD | 製品シリーズ | EZD | EasyPact EZD molded case circuit breaker series |
| 100/160/250/400/630 | フレーム電流 | 100/160/250/400/630 | Maximum rated current capacity |
| E/N/M | 遮断容量 | E(25の), N(36の), M(50の) | Ultimate breaking capacity @400V AC |
| 3-4 | 極数 | 3(3P), 4(4P) | 3P=3-phase 3-wire; 4P=3-phase 4-wire |
| 0XX/XX0 | 定格電流 | 15～630A | Rated current of thermal-magnetic trip unit |
| N/PK | 取付タイプ | N(修理済み), PK(プラグイン) | Fixed as standard; PK for plug-in |
| マ | Application Type | マ(Motor Protection) | Non-MA for distribution protection |
| EL/ELA | Residual Current | EL(30ミリアンペア), ELA(300ミリアンペア) | Exclusive for VigiEZD series |
- Complete Model List by Frame Size
2.1 EZD100 Frame (マックス. 100あ)
2.2 EZD160 Frame (マックス. 160あ)
2.3 EZD250 Frame (マックス. 250あ)
2.4 EZD400 Frame (マックス. 400あ)
2.5 EZD630 Frame (マックス. 630あ, with Electronic Trip)
- Residual Current Protected Type (VigiEZD Series)
- キーの選択手順
- Common Model Quick Reference (Distribution Protection)
- Accessory Compatibility Guide
