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
Chint NM1LE-250S/4300A-160A is a 4-pole molded case residual current サーキットブレーカー, mainly used in low-voltage power distribution systems to provide overload, 短絡, residual current protection and line control functions.
私. 主要な技術的パラメータ
1. 基本仕様
– フレーム電流: 250あ (indicating the maximum continuous current that the circuit breaker frame can withstand).
– 定格電流: 160あ (the current that can actually operate stably for a long time).
– 極数: 4P (三相4線式, suitable for three-phase loads and single-phase loads with neutral lines).
– 遮断容量: 30の (標準タイプ, capable of interrupting a short-circuit current of 30kA).
– 残留電流保護:
– Residual operating current is adjustable in three gears: 50/100/200ミリアンペア, suitable for different safety requirements (例えば, 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. トリップ特性
– 熱磁気リリース: 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. 認証と規格
– GB/Tに準拠 14048.2 (中国の標準) およびIEC 60947-2 (国際規格), and has passed CCC certification.
Ⅱ. Product Features and Applications
1. コア機能
– Multi-level Protection: オーバーロードを統合する, 短絡, and residual current protection to prevent electrical fires and personal electric shock.
– 高い信頼性: Mechanical life of 20,000 times and electrical life of 3,000 回, adapting to frequent operation requirements.
– 環境適応力: Operating temperature range -5℃ to +40℃, 標高 ≤2000 メートル, 工業用に適した, コマーシャル, and residential scenarios.
2. 典型的なアプリケーションシナリオ
– 産業用配電: Main switch or branch protection for production lines and motor control centers.
– 商業ビル: 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. 設置とメンテナンス
1. 設置方法
– 固定式: Fixed in the distribution cabinet through front-panel wiring, 垂直または水平設置をサポート.
– アクセサリの拡張: Optional shunt release (remote control opening), 補助接点 (status feedback), 等. しかし, it should be noted that the N pole of Type A circuit breakers does not support some accessories.
2. 予防
– 配線仕様: Ensure that the incoming and outgoing line connections are firm to avoid overheating caused by looseness.
– 定期テスト: を押します。 “test button” monthly to check whether the residual current protection function is normal.
– 環境要件: 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
– 製造中止: This model is currently discontinued, with the order number 710301100004066. It is recommended to prioritize alternative models.
– 代替モデル:
– NXMLE Series (例えば, 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. 参考価格
– The market price before discontinuation was approximately 1021 元/単位. The price of the alternative NXMLE series is slightly higher (例えば, NXMLE-160H is about 2018 元/単位), and the specific price is subject to the dealer’s quotation.
V. 選択の提案
1. 現在のマッチング: Select the rated current according to the total load current (例えば, 160A is suitable for loads ≤160A).
2. 遮断容量: If the short-circuit current is high (例えば, in industrial environments), prioritize models with higher breaking capacity (例えば, 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, 配線図), you can visit the official website of Chint Electric or contact local dealers.
