ABB UA16-30-10RA 커패시터 스위칭 접촉기

2. 핵심 기술 사양

3. Structural & 기능적 특징

3.1 Core Structure

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 Key Functions

Inrush Current Suppression: 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.

안전한 작동: 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. Optional Accessories List

5. Cross-Brand Equivalent & Replacement List

6. 선택 지침 & 대체 솔루션

6.1 주요 선택 매개변수

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

코일 전압: Must match control supply voltage; common 220V/380V to avoid coil burnout.

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

환경 조건: Derate for high temperature (>40℃) with derating factor 0.8~0.9.

6.2 Recommended Alternative Solutions

6.3 설치 & 유지보수 노트

1. Before Installation: Ensure capacitors are fully discharged to ≤50V to avoid residual charge hazards.
2. 배선: Main circuit wire cross-section ≥1.5mm²; control circuit ≥0.75mm²; ensure terminals are fully tightened.
3. 유지보수 주기: Inspect contact wear every 6 개월; recommend replacement after 100,000 cumulative operations.
4. 문제 해결: If contactor fails to operate, first check coil voltage and control circuit fuse.

ABB UA16-30-10RA는 저전압 무효 전력 보상 시스템용으로 설계된 전용 댐핑 저항 내장 커패시터 접촉기입니다..

3개의 직렬 저항기가 스위칭 돌입 전류를 억제합니다., 접점 보호 및 서비스 수명 연장.

400V에서 12.5kVar 커패시터 뱅크에 적합한 16A AC-6b 정격, 3-극 NO 기본 접점과 1NO 보조 접점이 표준 제어 요구 사항을 완벽하게 충족합니다..

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. 모델 명명 규칙

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

2. Full Model List by Current Rating

2.1 16A Series (≤12.5kVar @400V)

2.2 26A Series (≤20kVar @400V)

2.3 30A Series (≤25kVar @400V)

2.4 50A Series (≤40kVar @400V)

2.5 63A Series (≤50kVar @400V)

2.6 75A Series (≤60kVar @400V)

2.7 95A Series (≤75kVar @400V)

2.8 110A Series (≤90kVar @400V)

2.9 140A Series (≤110kVar @400V)

3. 코일 전압 옵션 (Universal for All Series)

4. Key Selection Instructions

4.1 Standard Type vs RA Built-in Resistor Type

기준 (Non-RA): Requires external reactor for inrush suppression; 저렴한 비용, 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: No auxiliary contacts, for simple control loops.

10 / 01: 1 아니요 / 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. 부속품 & Expansion Options

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.