접촉기,회로 차단기,태양광 인버터,전기 계량기,태양 전지
Model Code Explanation
| 모델 부분 | 설명 |
| 3RA6 | SIRIUS Compact Load Feeder / Direct On-Line Starter Series |
| 1 | Direct on-line starter type (DOL) |
| 20 | Rated operational current range: 1–4 A |
| 2 | 주회로 연결: spring-loaded terminals (1 = screw terminals) |
| CB | 제어 전압: 24 V AC/DC |
| 32 | 표준 버전: 1 아니요 + 1 NC 보조 접점, electronic overload protection |
- 핵심 기술 사양
Electrical Data
유형: SIRIUS Compact Load Feeder / Direct On-Line Starter
정격전압: 690 뷔와, 3-단계
제어 전압: 24 V AC/DC (50/60 헤르츠)
정격 작동 전류: 1–4 A
Motor power rating: 1.5 kW에서 400 다섯, 3 kW에서 690 다섯
보조 접점: 1 아니요 + 1 NC
보호: Electronic overload protection, 단락 보호
보호 정도: IP20
Mechanical Data
너비: 45 mm
설치: 기준 35 mm DIN rail mounting (screw and clip fixing)
무게: 대략. 1.51 kg (3.335 lb)
Connection type: Main circuit-spring-loaded terminals; Auxiliary circuit-spring-loaded terminals
III. 운영 환경
| Environmental Parameter | 범위 | 비고 |
| 작동 온도 | -20 °C to +60 ℃ | Accuracy of protection functions may be affected outside this range |
| 보관온도 | -55 °C to +80 ℃ | Also applicable during transport |
| Installation altitude | 최대 2000 중 | Derating by 10% per 1000 m increase in altitude |
| 상대습도 | 5% 에게 95% | Non-condensing, no dew formation |
| Pollution degree | 2 | Standard for industrial environments |
| Mounting position | Vertical mounting (추천) | Derating required for horizontal mounting |
일반적인 응용 분야
Control of small fans and pumps
Light-duty equipment such as conveyors and mixers
HVAC control in building automation systems
Auxiliary equipment control in industrial automation production lines
Replacement of conventional contactor + thermal relay combinations to save cabinet space
- Replacement Models and Brand Comparison
Siemens Replacement in Same Series
| 모델 | 차이점 | Suitable Application |
| 3RA6120-1CB32 | Main circuit with screw terminals | Environments with high vibration requiring more secure wiring |
| 3RA6120-2CB31 | Different auxiliary contact configuration | Special control circuit requirements |
Replacement Models from Other Brands
| 상표 | 모델 | 주요 일치 매개변수 |
| 슈나이더 일렉트릭 | LC1D09 + LRD06 | 9 접촉기 + 0.63–1 A thermal relay, suitable for 1.5 kW motors |
| 씨줄 | AF09-30-00 + TA25DU0.63 | 9 접촉기 + 0.63–1 A thermal relay |
| 친트 | NXC09 + NR2-25/Z | 9 접촉기 + 0.63–1 A thermal relay |
- 공식 주문 정보
Official order number: 3RA6120-2CB32 (globally unified)
Product status: Active product (PLM: PM300)
Minimum packaging: 1 unit/package
인증: CE, UL, CSA and other international certifications
- Complete Model List for 3RA61 Series (1–4 A Range)
| 모델 | Connection Type | 제어 전압 | 보조 연락처 |
| 3RA6120-1CB32 | 나사 터미널 | 24 V AC/DC | 1 아니요 + 1 NC |
| 3RA6120-1DB32 | 나사 터미널 | 110 뷔와 | 1 아니요 + 1 NC |
| 3RA6120-1FB32 | 나사 터미널 | 220 뷔와 | 1 아니요 + 1 NC |
| 3RA6120-2CB32 | Spring-loaded terminals | 24 V AC/DC | 1 아니요 + 1 NC |
| 3RA6120-2DB32 | Spring-loaded terminals | 110 뷔와 | 1 아니요 + 1 NC |
| 3RA6120-2FB32 | Spring-loaded terminals | 220 뷔와 | 1 아니요 + 1 NC |
Ⅶ. Engineering Recommendations and Risk Warnings
설치 참고 사항
- Mounting orientation: Vertical installation preferred; 10% derating required for horizontal installation
- Heat dissipation space: Reserve at least 5 mm on both sides for adequate cooling
- 배선사양: Main circuit conductor cross-section 0.5–2.5 mm²; auxiliary circuit 0.5–1.5 mm²
- Control circuit: Surge suppressor recommended to protect against voltage spikes
Risks in Cross-Brand Replacement
- Ensure overload protection curve matches the motor to avoid protection failure
- Spring-loaded and screw terminals are not directly interchangeable; rewiring and retightening required
- Electronic overload parameters must be reset according to motor nameplate data
- Short-circuit protection characteristics may vary between brands; short-circuit withstand rating must be verified
Maintenance Points
- Regularly check terminal tightness, especially in vibrating environments
- Clean dust from the device surface to maintain heat dissipation
- Periodically test overload protection function
- Consider voltage stabilizer if control voltage fluctuates beyond ±10%
Ⅷ. 요약
Siemens 3RA6120-2CB32는 컴팩트한 제품입니다., 접촉기를 결합한 통합 직접 온라인 스타터, 단락 보호 및 전자 과부하 보호. 소형 3상 모터용으로 설계되었습니다. (1.5 kW에서 400 다섯, 3 kW에서 690 다섯). Featuring spring-loaded terminals for quick wiring and a narrow 45 mm width to save cabinet space, its 24 V AC/DC wide-range control voltage supports various automation systems.
Typical Applications of Siemens 3RA6120-2CB32
This is a Siemens SIRIUS compact direct on-line starter with a rated current of 1–4 A, suitable for low-power three-phase motors, especially in applications requiring small motors, light loads and compact installation space.
- Fan Applications
Small axial fans, cabinet cooling fans
Fans for air conditioning units, fresh air system fans
Small smoke exhaust fans, cooling fans
- Pump Applications
Small booster pumps, circulation water pumps
Cooling water pumps, 윤활 펌프
Make-up pumps for hydraulic systems
- Conveying and Light Industry Machinery
Small belt conveyors, 롤러 컨베이어
Feeders, small elevators
Packaging machines, labeling machines, small conveyors
- Machine Tools and Automation Auxiliaries
Machine tool cooling pumps, 윤활 펌프
Small chip conveyors
Drive motors for tooling and fixtures
- 음식, Packaging and Textile Light Industry
Small mixers and blenders
Textile small rollers, feeding mechanisms
Small drive motors for food processing
- Building and HVAC Systems
Drive for small valve actuators
Air handling unit fans, coil fans
Small water treatment supporting equipment
- General Industrial Auxiliaries
Small fans, vibration motors
Auxiliaries for small air compressors
Auxiliary drive motors for various equipment
Suitable for all applications involving three-phase small motors up to approximately 1.5 kW에서 400 V with current 1–4 A, requiring direct starting, 초과 적재 + 단락 보호, and compact size with fast wiring.
