คอนแทคเตอร์,เบรกเกอร์,อินเวอร์เตอร์พลังงานแสงอาทิตย์,มิเตอร์ไฟฟ้า,แบตเตอรี่พลังงานแสงอาทิตย์
Chint NM1LE-250S/4300A-160A is a 4-pole molded case residual current เบรกเกอร์, mainly used in low-voltage power distribution systems to provide overload, ลัดวงจร, residual current protection and line control functions.
ฉัน. Key Technical Parameters
1. Basic Specifications
– Frame Current: 250ก (indicating the maximum continuous current that the circuit breaker frame can withstand).
– จัดอันดับปัจจุบัน: 160ก (the current that can actually operate stably for a long time).
– หมายเลขขั้วโลก: 4ป (three-phase four-wire, suitable for three-phase loads and single-phase loads with neutral lines).
– ทำลายความจุ: 30ที่ (ประเภทมาตรฐาน, capable of interrupting a short-circuit current of 30kA).
– การป้องกันกระแสไฟตกค้าง:
– Residual operating current is adjustable in three gears: 50/100/200มิลลิแอมป์, suitable for different safety requirements (เช่น, 50mA for general places, and below 30mA can be used as supplementary protection against personal electric shock).
– Residual operating time ≤0.1 seconds, quickly cutting off the faulty circuit.
2. Tripping Characteristics
– Thermomagnetic Release: It has both overload long-time delay (thermal protection) and short-circuit instantaneous (magnetic protection) functions with precise response.
– N Pole Characteristics: Type A design (N pole is straight-through without overcurrent protection), suitable for power distribution systems where the neutral line is not cut off.
3. Certifications and Standards
– Complies with GB/T 14048.2 (Chinese standard) และไออีซี 60947-2 (international standard), and has passed CCC certification.
ครั้งที่สอง. Product Features and Applications
1. Core Functions
– Multi-level Protection: Integrates overload, ลัดวงจร, and residual current protection to prevent electrical fires and personal electric shock.
– High Reliability: Mechanical life of 20,000 times and electrical life of 3,000 ครั้ง, adapting to frequent operation requirements.
– Environmental Adaptability: Operating temperature range -5℃ to +40℃, altitude ≤2000 meters, suitable for industrial, commercial, and residential scenarios.
2. สถานการณ์การใช้งานทั่วไป
– Industrial Power Distribution: Main switch or branch protection for production lines and motor control centers.
– อาคารพาณิชย์: Residual current protection for distribution boxes in office buildings and shopping malls.
– Residential and Infrastructure: Temporary electricity protection for community distribution rooms and construction elevators.
III. การติดตั้งและบำรุงรักษา
1. Installation Methods
– Fixed Type: Fixed in the distribution cabinet through front-panel wiring, supporting vertical or horizontal installation.
– Accessory Expansion: Optional shunt release (remote control opening), auxiliary contacts (status feedback), ฯลฯ. อย่างไรก็ตาม, it should be noted that the N pole of Type A circuit breakers does not support some accessories.
2. ข้อควรระวัง
– Wiring Specifications: Ensure that the incoming and outgoing line connections are firm to avoid overheating caused by looseness.
– Regular Testing: กด “ปุ่มทดสอบ” monthly to check whether the residual current protection function is normal.
– ข้อกำหนดด้านสิ่งแวดล้อม: The installation site should be dry, free of corrosive gases, and avoid dust accumulation affecting performance.
IV. Alternative Solutions and Market Status
1. Discontinuation and Alternatives
– Discontinued: This model is currently discontinued, with the order number 710301100004066. It is recommended to prioritize alternative models.
– Alternative Models:
– NXMLE Series (เช่น, NXMLE-250S/4300A-160A): The breaking capacity is increased to 36kA, supporting residual current alarm without tripping function, suitable for more complex scenarios.
– NM1LE-G Series: There is still inventory in some channels, which can be used as a transitional option.
2. การอ้างอิงราคา
– The market price before discontinuation was approximately 1021 yuan/unit. The price of the alternative NXMLE series is slightly higher (เช่น, NXMLE-160H is about 2018 yuan/unit), and the specific price is subject to the dealer’s quotation.
วี. Selection Suggestions
1. Current Matching: Select the rated current according to the total load current (เช่น, 160A is suitable for loads ≤160A).
2. ทำลายความจุ: If the short-circuit current is high (เช่น, in industrial environments), prioritize models with higher breaking capacity (เช่น, NXMLE-H series with a breaking capacity of 50kA).
3. Residual Current Sensitivity: For places involving personal safety, it is recommended to choose models with residual current ≤30mA; for general power distribution, 50-200mA is optional.
4. Accessory Requirements: If remote control or status monitoring is needed, confirm in advance whether the circuit breaker supports the corresponding accessories.
For more detailed technical data (such as installation dimension drawings, wiring diagrams), you can visit the official website of Chint Electric or contact local dealers.
