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
- Basic Model Meaning & Positioning Difference
| モデル | 意味 | 製品のポジショニング |
| XT1B | XT1 series + B (基本) basic breaking capacity | Compact switch-disconnector / economic MCCB, meets basic protection requirements |
| XT1N | XT1 series + N (Normal) 標準遮断容量 | Standard MCCB with higher breaking performance, for general power distribution protection |
Core positioning: XT1B is an economical basic protection solution, XT1N is a standard high-performance protection solution. Both belong to the XT1 frame (最大. 160あ) and share the same physical dimensions and mounting method.
- 主要な技術パラメータの比較
| アイテム | XT1B Series | XT1N Series | 主な違い |
| Rated ultimate short-circuit breaking capacity (ICU, 380Vと) | 18の | 36の | XT1N has twice the breaking capacity, suitable for systems with higher short-circuit current |
| 定格使用短絡遮断容量 (ＩＣＳ, 380Vと) | 18の (100% ICU) | 36の (100% ICU) | XT1N can withstand more severe short-circuit faults and remain usable |
| フレーム電流 (インム) | 160あ | 160あ | Same frame, 同一寸法 |
| Rated current range (で) | 16A~160A (Thermal-magnetic TMD) | 32A~160A (Thermal-magnetic TMD) | XT1B covers lower currents for more small-power loads |
| Thermal-magnetic release adjustment range | 0.4~1 In | 0.4~1 In | Same protection curve adjustment |
| 極 | 3P/4P | 3P/4P | Same pole configuration |
| 定格絶縁電圧 (ウイ) | 690Vと | 690Vと | Same insulation level |
| 定格動作電圧 (うえ) | Up to 690V AC/500V DC | Up to 690V AC/500V DC | Same voltage range |
| 機械的耐久性 | 25,000 動作サイクル | 25,000 動作サイクル | Same mechanical durability |
| 取付タイプ | 修理済み / プラグイン, compatible with 35mm DIN rail | 修理済み / プラグイン, compatible with 35mm DIN rail | Same mounting flexibility |
| Typical applications | Lighting, small fans, general socket circuits, residential distribution | Industrial distribution, motor protection, main circuits in commercial buildings, high-reliability loads |
- In-depth Analysis of Key Performance & アプリケーション
3.1 Practical Impact of Breaking Capacity Difference
XT1B (18の): Suitable for final distribution with low short-circuit current, 例えば, 居住の, 小さな店, office final circuits; fault current usually ≤10kA
XT1N (36の): Suitable for main distribution in industrial plants, large commercial centers, and circuits near transformers, where short-circuit current can reach 20–30kA
3.2 製品タイプ & 機能的な位置付け
XT1B: Also functions as a load break switch, IECに準拠 60947-3 isolation requirements, can be used as a circuit isolating device
XT1N: Standard MCCB focusing on comprehensive protection, providing more reliable overload and short-circuit protection for high-safety electrical systems
3.3 選定基準
| 選択要素 | Recommended XT1B | Recommended XT1N |
| System short-circuit current | ≤15kA | ≥15kA and ≤36kA |
| 応用 | Final distribution in civil buildings, small loads, cost-sensitive projects | Industrial environments, motor protection, critical loads, main commercial circuits |
| Protection priority | 基本的な保護 + 分離 | 完全な保護 + 高い信頼性 |
| 予算 | Strict budget, cost-performance focus | Medium budget, long-term reliability focus |
- インストール & Maintenance Compatibility
- Physical compatibility: Identical mounting dimensions (width 70mm, height varies slightly by pole count), directly interchangeable without modifying panel cutouts
- Accessory compatibility: Standard accessories such as auxiliary contacts, 警報接点, undervoltage releases are fully interchangeable, reducing spare parts inventory cost
- Consistent operation: Both support manual operation; motor mechanisms can be added with the same logic
The core differences between ABB XT1B and XT1N series are breaking capacity and functional positioning:
XT1B focuses on economy and basic protection, with isolation function, suitable for final distribution.
XT1N focuses on high performance and full protection, suitable for applications requiring higher reliability.
Selection should prioritize evaluating system short-circuit current and load importance, ensuring the breaker’s breaking capacity exceeds the expected maximum short-circuit current, while balancing project budget and long-term maintenance costs.
