คอนแทคเตอร์,เบรกเกอร์,อินเวอร์เตอร์พลังงานแสงอาทิตย์,มิเตอร์ไฟฟ้า,แบตเตอรี่พลังงานแสงอาทิตย์
- Basic Model Meaning & Positioning Difference
| แบบอย่าง | ความหมาย | การวางตำแหน่งผลิตภัณฑ์ |
| XT1B | XT1 series + บี (Basic) basic breaking capacity | Compact switch-disconnector / economic เอ็มซีซีบี, meets basic protection requirements |
| XT1N | XT1 series + เอ็น (Normal) standard breaking capacity | 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 (max. 160ก) and share the same physical dimensions and mounting method.
- Core Technical Parameters Comparison
| รายการ | XT1B Series | XT1N Series | Key Difference |
| Rated ultimate short-circuit breaking capacity (ห้องไอซียู, 380วีและ) | 18ที่ | 36ที่ | XT1N has twice the breaking capacity, suitable for systems with higher short-circuit current |
| Rated service short-circuit breaking capacity (ไอซีเอส, 380วีและ) | 18ที่ (100% ห้องไอซียู) | 36ที่ (100% ห้องไอซียู) | XT1N can withstand more severe short-circuit faults and remain usable |
| Frame current (Inm) | 160ก | 160ก | Same frame, identical dimensions |
| Rated current range (In) | 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 |
| Poles | 3P/4P | 3P/4P | Same pole configuration |
| จัดอันดับแรงดันไฟฟ้าของฉนวน (อุ้ย) | 690วีและ | 690วีและ | Same insulation level |
| Rated operational voltage (อือ) | Up to 690V AC/500V DC | Up to 690V AC/500V DC | Same voltage range |
| Mechanical endurance | 25,000 operating cycles | 25,000 operating cycles | Same mechanical durability |
| Mounting type | ที่ตายตัว / plug-in, compatible with 35mm DIN rail | ที่ตายตัว / plug-in, 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 & Applications
3.1 Practical Impact of Breaking Capacity Difference
XT1B (18ที่): Suitable for final distribution with low short-circuit current, เช่น, residential, ร้านค้าเล็กๆ, office final circuits; fault current usually ≤10kA
XT1N (36ที่): Suitable for main distribution in industrial plants, large commercial centers, and circuits near transformers, where short-circuit current can reach 20–30kA
3.2 Product Type & Functional Positioning
XT1B: Also functions as a load break switch, complies with IEC 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 Selection Reference
| Selection Factor | Recommended XT1B | Recommended XT1N |
| System short-circuit current | ≤15kA | ≥15kA and ≤36kA |
| แอปพลิเคชัน | Final distribution in civil buildings, small loads, cost-sensitive projects | Industrial environments, motor protection, critical loads, main commercial circuits |
| Protection priority | Basic protection + isolation | การป้องกันเต็มรูปแบบ + ความน่าเชื่อถือสูง |
| Budget | Strict budget, cost-performance focus | Medium budget, long-term reliability focus |
- การติดตั้ง & 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, alarm contacts, 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.
