ABB UA16-30-10RA コンデンサ スイッチング コンタクタ

2. 主要な技術仕様

3. 構造的 & 機能的な特徴

3.1 コア構造

Built-in Damping Resistor Module: 3 independent resistors connected in series to the main circuit, realizing capacitor pre-charging and limiting switching peak current to a safe level.

Special Contact Design: Main contacts adopt anti-welding alloy material to enhance arc erosion resistance and withstand frequent inrush current impact.

Mechanical Interlock Mechanism: Ensures resistors close before main contacts and open after main contacts, completing a full current-limiting protection cycle.

Modular Accessory System: Supports expansion with auxiliary contacts, surge suppressors and other accessories.

3.2 主な機能

突入電流の抑制: Built-in resistors reduce switching inrush current from 100×In to about 10×In, greatly lowering contact ablation risk.

Reactor-Free Design: RA series with inherent current limiting; no need for external series reactors, saving installation space and cost.

安全な操作: Capacitor bank must discharge to ≤50V before re-energization to prevent secondary inrush current caused by residual charge.

Signal Feedback: 1NO auxiliary contact for status indication and interlock control.

4. オプションアクセサリリスト

5. ブランド間の同等品 & 交換品リスト

6. 選定ガイドライン & 代替ソリューション

6.1 主要な選択パラメータ

Capacitor Capacity: UA16-30-10RA suitable for 3-phase capacitor banks ≤12.5kVar@400V / ≤20kVar@600V.

コイル電圧: Must match control supply voltage; common 220V/380V to avoid coil burnout.

取り付け: Confirm 35mm standard DIN rail; special bracket required for non-standard rails.

環境条件: Derate for high temperature (>40℃) with derating factor 0.8~0.9.

6.2 推奨される代替ソリューション

6.3 インストール & メンテナンスノート

1. インストールの前に: Ensure capacitors are fully discharged to ≤50V to avoid residual charge hazards.
2. 配線: Main circuit wire cross-section ≥1.5mm²; control circuit ≥0.75mm²; ensure terminals are fully tightened.
3. メンテナンスサイクル: コンタクトの磨耗を毎回点検する 6 月; recommend replacement after 100,000 cumulative operations.
4. トラブルシューティング: If contactor fails to operate, first check coil voltage and control circuit fuse.

ABB UA16-30-10RAは、低電圧無効電力補償システム用に設計された専用のダンピング抵抗内蔵コンデンサコンタクタです。.

3つの直列抵抗がスイッチング突入電流を抑制, 接点を保護し、寿命を延ばす.

16A AC-6b 定格で、400V の 12.5kVar コンデンサバンクに適しています, 3-極 NO メイン接点と 1NO 補助接点で標準制御要件を完全に満たす.

Compared with ordinary contactors, the RA series needs no external reactor and features simple installation, making it an ideal choice for industrial and building power distribution reactive compensation systems.

Complete Model List of ABB UA Series Capacitor Switching Contactors

1. モデルの命名規則

ABB UA series capacitor contactors adopt a unified naming format for quick parameter identification:

2. Full Model List by Current Rating

2.1 16シリーズ (≤12.5kVar @400V)

2.2 26シリーズ (≤20kVar @400V)

2.3 30シリーズ (≤25kVar @400V)

2.4 50シリーズ (≤40kVar @400V)

2.5 63シリーズ (≤50kVar @400V)

2.6 75シリーズ (≤60kVar @400V)

2.7 95シリーズ (≤75kVar @400V)

2.8 110シリーズ (≤90kVar @400V)

2.9 140シリーズ (≤110kVar @400V)

3. コイル電圧オプション (Universal for All Series)

4. キーの選択手順

4.1 Standard Type vs RA Built-in Resistor Type

標準 (Non-RA): Requires external reactor for inrush suppression; 低コスト, suitable for systems with existing reactors.

RA Built-in Resistor Type: 3 built-in damping resistors reduce switching inrush from 100×In to approx.10×In; no extra components needed for easy installation.

4.2 Auxiliary Contact Selection

00: 補助接点なし, for simple control loops.

10 / 01: 1 いいえ / 1 NC for status indication and interlock.

11: 1NO+1NC for complex control logic such as automatic switching systems.

4.3 Capacitor Capacity Reference (@400V)

5. 付属品 & 拡張オプション

ABB UA series capacitor switching contactors cover full current range 16A~140A, providing standard type and RA built-in resistor type.

Flexible auxiliary contact configurations (00/10/01/11) and global compatible coil voltages are available.

The RA series effectively reduces switching inrush current, protects contacts and extends service life, making it the ideal solution for low-voltage reactive power compensation systems.