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
製品概要
The Schneider NSX250A is a 250A frame current rating product under the ComPacT NSX series of 配線用遮断器. Specifically designed for medium and low-voltage power distribution systems, it features high reliability, モジュラー設計, and digital characteristics, and is a key component of Schneider’s EcoStruxure power distribution solutions.
コアパラメータ
| パラメータ項目 | パラメータ値 | 説明 |
| フレーム電流 | 250あ | Maximum current-carrying capacity |
| 定格電流 | 40/100/160/250あ | Optional specifications, must match the load |
| 遮断容量 | 36の (タイプF) | Maximum breaking current in case of short circuit |
| 50の (タイプN) | ||
| 70-100の (Type H/S) | ||
| 定格電圧 | 690Vと | 最大動作電圧 |
| 1000Vと (special models) | ||
| 極数 | 3P/4P | 三相 / three-phase four-wire system |
| トリップユニットの種類 | 顎関節症 (熱磁気) | Selection of protection mechanism |
| マイクロロジック 2.2/4.2/6.2/7.2 (電子) | ||
| 設置方法 | 固定式 | Flexible installation options |
| プラグインタイプ | ||
| 引き出し式 |
Trip Unit Comparison
1️⃣ TMD (熱磁気トリップユニット)
動作原理: Thermal elements (bimetallic strips) detect overloads, and electromagnetic elements detect short circuits.
特徴: シンプルな構造, 低コスト, narrow setting range (0.7~1In).
応用: General power distribution protection scenarios that do not require precise parameter adjustment.
2️⃣ Micrologic (Electronic Trip Unit)
動作原理: Digital circuits perform monitoring and protection, providing multiple protection functions.
特徴:
– Wide setting range (0.4~1In) and high accuracy (±15%).
– Provides maintenance information such as contact wear and operation count.
– Supports multiple protection functions: 過負荷, short-circuit short delay, 地絡, 等.
応用: Industrial and commercial power distribution that requires high protection accuracy and intelligent monitoring.
アプリケーションシナリオ
産業用配電システム: Protection for mechanical equipment and production lines.
商業ビル: Main circuits in shopping malls and office buildings.
データセンター: Power systems requiring high-reliability protection.
住宅用配電: Main switches providing comprehensive protection.
発電機の保護: Supported by special models (TM-G).
主な利点
- 高い信頼性: Adopts a double-rotating contact structure with a breaking capacity of up to 150kA to ensure system safety.
- モジュラー設計:
– Multiple trip units optional to adapt to different load characteristics.
– Rich accessories: 補助接点, 警報接点, シャントトリップ装置, 等.
– 電動操作機構 (≥160A) リモコンをサポート.
- Digital Characteristics:
– Electronic trip units provide precise protection and fault diagnosis.
– Supports integration with the Schneider EcoStruxure system to realize smart grid management.
選択ポイント
- Rated Current Selection: ≥ Calculated load current and ≤ 250A.
- 遮断容量の選択:
– General civil/commercial use: 36の (タイプF) is sufficient.
– Industrial environments: 50の (タイプN) or higher.
– Special occasions (例えば, 発電所): Consider 70-100kA (Type H/S).
- トリップユニットの選択:
– Simple power distribution: 顎関節症 (費用対効果の高い).
– 重要な負荷: マイクロロジック (インテリジェントな保護).
- 極数の選択:
– Three-phase equipment: 3P.
– Three-phase four-wire system: 4P.
参考価格
TMD Type (36kA/50kA): 約 1,600-2,500 人民元
Micrologic Type: 約 2,500-5,000 人民元 (depending on function complexity)
まとめ
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. 選択時, the appropriate model and configuration should be determined based on actual load characteristics, short-circuit current levels, および保護要件。
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