ชไนเดอร์ NSX250A เซอร์กิตเบรกเกอร์

Product Overview

The Schneider NSX250A is a 250A frame current rating product under the ComPacT NSX series of molded case circuit breakers. Specifically designed for medium and low-voltage power distribution systems, it features high reliability, modular design, and digital characteristics, and is a key component of Schneider’s EcoStruxure power distribution solutions.

พารามิเตอร์หลัก

Trip Unit Comparison

1️⃣ TMD (Thermomagnetic Trip Unit)

Working Principle: Thermal elements (bimetallic strips) detect overloads, and electromagnetic elements detect short circuits.

คุณสมบัติ: Simple structure, low cost, narrow setting range (0.7~1In).

Application: General power distribution protection scenarios that do not require precise parameter adjustment.

2️⃣ Micrologic (Electronic Trip Unit)

Working Principle: Digital circuits perform monitoring and protection, providing multiple protection functions.

คุณสมบัติ:

– Wide setting range (0.4~1In) and high accuracy (±15%).

– Provides maintenance information such as contact wear and operation count.

– Supports multiple protection functions: โอเวอร์โหลด, short-circuit short delay, earth fault, ฯลฯ.

Application: Industrial and commercial power distribution that requires high protection accuracy and intelligent monitoring.

สถานการณ์การใช้งาน

Industrial Power Distribution Systems: Protection for mechanical equipment and production lines.

อาคารพาณิชย์: Main circuits in shopping malls and office buildings.

Data Centers: Power systems requiring high-reliability protection.

การจำหน่ายไฟฟ้าที่อยู่อาศัย: Main switches providing comprehensive protection.

Generator Protection: Supported by special models (TM-G).

Key Advantages

1. High Reliability: Adopts a double-rotating contact structure with a breaking capacity of up to 150kA to ensure system safety.
2. การออกแบบโมดูลาร์:

– Multiple trip units optional to adapt to different load characteristics.

– Rich accessories: auxiliary contacts, alarm contacts, อุปกรณ์แบ่งการเดินทาง, ฯลฯ.

– Electric operating mechanism (≥160A) supports remote control.

3. Digital Characteristics:

– Electronic trip units provide precise protection and fault diagnosis.

– Supports integration with the Schneider EcoStruxure system to realize smart grid management.

จุดคัดเลือก

1. Rated Current Selection: ≥ Calculated load current and ≤ 250A.
2. Breaking Capacity Selection:

– General civil/commercial use: 36ที่ (ประเภท เอฟ) is sufficient.

– Industrial environments: 50ที่ (ประเภท เอ็น) or higher.

– Special occasions (เช่น, power plants): Consider 70-100kA (Type H/S).

3. Trip Unit Selection:

– Simple power distribution: TMD (cost-effective).

– Critical loads: Micrologic (intelligent protection).

4. Pole Number Selection:

– Three-phase equipment: 3ป.

– Three-phase four-wire system: 4ป.

การอ้างอิงราคา

TMD Type (36kA/50kA): ประมาณ 1,600-2,500 หยวน

Micrologic Type: ประมาณ 2,500-5,000 หยวน (depending on function complexity)

สรุป

The Schneider NSX250A circuit breaker is a high-performance and high-reliability medium-voltage power distribution protection device. It is suitable for various industrial and commercial scenarios and offers multiple options ranging from basic thermomagnetic protection to intelligent electronic protection. เมื่อทำการเลือก, the appropriate model and configuration should be determined based on actual load characteristics, short-circuit current levels, and protection requirements。

Do you need me to further optimize the translation of certain professional terms in this document, or generate a PDF version of the English translation for easier sharing and storage?