접촉기,회로 차단기,감지기,인코더,PLC,변환기
단종 (지멘스 stopped delivery effective Oct 01, 2023), legacy obsolete model. Factory recommended replacement: 3RW5055-6AB14
- Order Number Breakdown
3RW: 천랑성 소프트 스타터 시리즈
40: Basic soft starter, built-in bypass, 2-phase thyristor control (Phase L1, L3)
55: S6 frame, rated current code 134A
6: 나사 터미널
BB: 표준 구성
4: Control supply AC230V
- 핵심 전기 사양
| 목 | 매개변수 |
| 모델 | 3RW4055-6BB44 |
| 액자 | S6 |
| Rated operational current Ie (40℃) | 134 에이 |
| Rated motor power @400V,40℃ | 75 kW |
| Main circuit voltage Ue | AC 200～460V |
| Control supply | 교류 230V |
| 빈도 | 50/60헤르츠 |
| Built-in bypass contactor | ✅ Yes. Bypasses thyristors after start to reduce heat generation |
| 모터 과부하 보호 | ✅ Integrated motor overload protection (수업 10) |
| Current limiting function | ✅ Adjustable current limit |
| PTC thermistor motor protection | ❌ Not supported |
| Inside-delta connection | ❌ Not supported, standard external connection only |
| 보호 등급 | IP00 |
| 전체 치수 (H × W × D) | 198 × 120 × 250 mm |
| 무게 | 4.976 kg |
- 주변 & 설치 조건
- 주변 온도: -25℃ ~ +60℃. 40℃ 이상에서는 디레이팅 필요; rated current reduces to 100A at 60℃
- 설치 고도: Max 5000m. 1000m 이상에서는 정격 감소 필요; main circuit upper limit reduced to 460V above 2000m
- Max cable length from soft starter to motor: 300중
- Installation clearance: ≥100mm 상단, ≥5mm side, ≥75mm bottom
- 오염도: 3 (IEC 60947-4-2)
- 기능 설명
2-phase thyristor voltage regulation soft start, 통합 바이패스. Mechanical contacts carry load current during continuous operation for low power loss
Adjustable start ramp and current limit; external reset supported
Integrated equipment fault protection and motor overload protection; fault relay outputs (95/96, 95/98)
Single direction start, no braking output; no communication interface (3RW40 series without Modbus/Profinet)
Typical loads: 물 펌프, 팬, compressors and general loads. Not suitable for frequent heavy-duty starting
- 선택 & 교체 옵션
- Factory direct upgrade model: 3RW5055-6AB14 (New 3RW5 generation)
Same rating 134A /75kW@400V, AC230V control, 나사 터미널; 강화된 보호, optional communication module
- Domestic alternative candidates (same current rating): Renle, Xipu, 친트, Delixi soft starters, 134A클래스.
- 문제 해결 가이드 (General for 3RW40 series)
- No power-up display: Check 230V control supply and terminal wiring
- Overload trip during startup: Verify motor rated current setting; derating required under high ambient temp or frequent start-stop
- No torque on start: Inspect main incoming power, thyristors and bypass contacts
- 빈번한 트립: Check harmonic distortion and whether semiconductor fast fuses are fitted upstream
비교표: 3RW4055-6BB44 VS 3RW5055-6AB14
3RW4055-6BB44: Discontinued legacy unit; 3RW5055-6AB14: Factory recommended replacement, 나사식 터미널, built-in bypass, 2-phase thyristor soft starter
| 비교항목 | 3RW4055-6BB44 | 3RW5055-6AB14 | 비고 |
| 주문 번호. | 3RW4055-6BB44 | 3RW5055-6AB14 | Official direct replacement by Siemens |
| 제품 시리즈 | SIRIUS 3RW40 (Basic Soft Starter) | SIRIUS 3RW50 (New Generation Basic Soft Starter) | 3RW40 discontinued since Oct 2023 |
| Rated operational current Ie @40℃ | 134 에이 | 143 에이 | New model with larger current margin |
| Rated motor power @400V,40℃ | 75 kW | 75 kW | Both for standard 75kW loads |
| Main circuit voltage Ue | AC 200～460 V | AC 200～480 V | New model extended upper limit to 480V |
| Control supply | Fixed AC230V | Wide range AC110～250V | Key difference: universal control supply for 110V/220V |
| Thyristor control phases | 2-phase control (L1, L3) | 2-phase control (L1, L3) | Same topology, no modification required for primary power circuit |
| Built-in bypass contactor | ✅ Yes | ✅ Yes | Thyristor bypass after start for low running loss |
| 과부하 보호 | Integrated motor overload Class10 | Integrated electronic overload Class10 | Same protection class |
| PTC thermistor motor protection | ❌ Not supported | ❌ Not supported | Neither has PTC input |
| Inside-delta connection | ❌ Not supported | ❌ Not supported | Standard external connection only |
| Soft stop | Basic ramp only | Soft stop + pump ramp down | Pump-friendly function on new model |
| Adjustable current limit range | 130%～400% | 130%～700% | Wider limit range for new model |
| 아날로그 출력 | ❌ None | ✅ Built-in 4~20mA (configurable to 0~10V) | Transmit current/load signal to PLC |
| 통신 포트 | ❌ No communication, non-expandable | ✅ Optional Profinet/Modbus communication module | Legacy model has no communication capability |
| Fault history | Basic fault relay only | Fault log available (with optional HMI module) | New model can retrieve historical faults |
| 디지털 I/O | Fixed relay outputs (95/96,95/98) | Programmable DI/DO, 3 programmable outputs +1 fixed changeover contact | More flexible secondary control logic |
| Operator unit | Dip-switch setting on board | Dip-switch + optional external HMI module | Legacy no display; new HMI for parameter & current reading |
| 보호 등급 | IP00 | IP00 | For cabinet mounting only |
| 차원 (H × W × D mm) | 198 × 120 × 250 | 200 × 120 × 240 | 같은 너비, similar height, shorter depth; mounting holes compatible |
| 순중량 | 4.976 kg | 4.0 kg | New model lighter |
| 주변 온도 | -25℃ ~ +60℃ | −25℃ ~ +60℃ | Derating required at high temperature for both |
| Max motor cable length | 300 중 | 300 중 | 동일한 |
| Installation clearance | ≥100mm 상단, ≥5mm side, ≥75mm bottom | ≥100mm 상단, ≥5mm side, ≥75mm bottom | Same installation space requirement |
| 오염도 | 3 (IEC60947-4-2) | 3 (IEC60947-4-2) | 동일한 |
| 수명주기 | 단종, spare parts limited | 생산 중, regular stock | Preferred model for retrofit & 새로운 프로젝트 |
교체 구현 핵심 사항 (Engineering Focus)
- Primary power circuit: 완벽하게 호환됨. Incoming and motor terminal positions basically match; direct replacement without re-routing power cables.
- Secondary control circuit
Legacy unit fixed AC230V supply; new model accepts AC110~250V wide range. Existing 230V control circuit works directly.
Relay logic is similar, but new DO channels are user configurable. Verify fault/run relay logic after power-on.
New 4~20mA analog output can be left unconnected if not required.
- Parameter re-setting: 모터 정격 전류, start ramp and current limit must be re-programmed in new soft starter; parameters from old unit cannot be reused directly.
- Protection scheme: Selection principle for upstream semiconductor fast fuses unchanged; retain original short-circuit protection.
Application Difference Summary
3RW4055: For existing legacy equipment, simple soft start only, no monitoring, 의사소통 없음, no analog output.
3RW5055: Preferred for new projects and retrofits. Pump ramp-down recommended for pump applications. Supports communication and 4-20mA current feedback to PLC for SCADA monitoring.
- 3RW40 (Discontinued Legacy Series｜2-phase thyristor, built-in bypass, series of target model)
Main circuit AC200~460V, built-in bypass, Class10 motor overload protection. Suffix defines terminal type, control supply and PTC option; @40℃, rated motor power at 400V.
| 주문 번호. | 액자 | 즉(에이) | Motor Power @400V(kW) | 비고 |
| 3RW4024-1BB04 | S0 | 12.5 | 5.5 | Screw terminal AC230V |
| 3RW4026-1BB04 | S0 | 25 | 11 | Screw terminal AC230V |
| 3RW4027-1BB04 | S0 | 32 | 15 | Screw terminal AC230V |
| 3RW4028-1BB04 | S0 | 38 | 18.5 | Screw terminal AC230V |
| 3RW4036-1BB04 | S2 | 45 | 22 | Screw terminal AC230V |
| 3RW4037-1BB04 | S2 | 63 | 30 | Screw terminal AC230V |
| 3RW4038-1BB04 | S2 | 72 | 37 | Screw terminal AC230V |
| 3RW4046-1BB04 | S3 | 80 | 45 | Screw terminal AC230V |
| 3RW4047-1BB04 | S3 | 106 | 55 | Screw terminal AC230V |
| 3RW4055-6BB44 | S6 | 134 | 75 | Screw terminal AC230V (target model) |
| 3RW4056-6BB44 | S6 | 171 | 90 | Screw terminal AC230V |
| 3RW4072-6BB44 | S12 | 210 | 110 | Screw terminal AC230V |
| 3RW4073-6BB44 | S12 | 250 | 132 | Screw terminal AC230V |
| 3RW4074-6BB44 | S12 | 315 | 160 | Screw terminal AC230V |
| 3RW4075-6BB44 | S12 | 370 | 200 | Screw terminal AC230V |
| 3RW4076-6BB44 | S12 | 470 | 250 | Screw terminal AC230V |
| 3RW4077-6BB44 | S12 | 570 | 315 | Screw terminal AC230V |
보충: Same current ratings also available with spring-cage terminals (suffix 2BBxx), 24V control supply, PTC thermistor version (TBxx). Table above lists only mainstream models with screw terminal & AC230V control supply same as 3RW4055-6BB44.
Series feature: 2-phase L1/L3 control, built-in bypass, 의사소통 없음, no analog output; 3RW405~407 (S6/S12) support PTC motor thermal protection.
- 3RW50 (New Generation Replacement Series｜Successor of 3RW40, Active Production)
Main circuit AC200~480V, built-in bypass, 2-phase thyristor, wide control supply AC110~250V; built-in 4~20mA analog output, optional Profinet/Modbus module, pump soft stop function.
| 주문 번호. | 액자 | 즉(에이) | Motor Power @400V(kW) | 비고 |
| 3RW5024-6AB14 | S0 | 12.5 | 5.5 | 나사식 터미널, wide range control supply |
| 3RW5026-6AB14 | S0 | 25 | 11 | 나사식 터미널, wide range control supply |
| 3RW5027-6AB14 | S0 | 32 | 15 | 나사식 터미널, wide range control supply |
| 3RW5028-6AB14 | S0 | 38 | 18.5 | 나사식 터미널, wide range control supply |
| 3RW5036-6AB14 | S2 | 45 | 22 | 나사식 터미널, wide range control supply |
| 3RW5037-6AB14 | S2 | 63 | 30 | 나사식 터미널, wide range control supply |
| 3RW5038-6AB14 | S2 | 72 | 37 | 나사식 터미널, wide range control supply |
| 3RW5046-6AB14 | S3 | 80 | 45 | 나사식 터미널, wide range control supply |
| 3RW5047-6AB14 | S3 | 106 | 55 | 나사식 터미널, wide range control supply |
| 3RW5055-6AB14 | S6 | 143 | 75 | Screw terminal AC110~250V (Official replacement for 3RW4055-6BB44) |
| 3RW5056-6AB14 | S6 | 171 | 90 | 나사식 터미널, wide range control supply |
| 3RW5072-6AB14 | S12 | 210 | 110 | 나사식 터미널, wide range control supply |
| 3RW5073-6AB14 | S12 | 250 | 132 | 나사식 터미널, wide range control supply |
| 3RW5074-6AB14 | S12 | 315 | 160 | 나사식 터미널, wide range control supply |
| 3RW5075-6AB14 | S12 | 370 | 200 | 나사식 터미널, wide range control supply |
| 3RW5076-6AB14 | S12 | 470 | 250 | 나사식 터미널, wide range control supply |
| 3RW5077-6AB14 | S12 | 570 | 315 | 나사식 터미널, wide range control supply |
보충: 3RW50 same current ratings also available with spring-cage terminals (2AB14), 24V control supply and PTC version (TBxx).
- Brief Introduction of Other Soft Starter Series in Same Family (선택 참고)
- 3RW30: 보급형 기본 모델, 2-단계, built-in bypass, low power range, no PTC, 의사소통 없음; lower grade than 3RW40
- 3RW44: Legacy high-performance type (단종). Supports inside-delta connection, 3-phase thyristor, rich protections, suitable for heavy duty
- 3RW52: New generation high performance. Supports inside-delta, 3-phase thyristor, for heavy-duty fans & 압축기; replacement for legacy 3RW44
- 3RW55: High-end safety version including F safety variant, for high safety integrity applications
- Order Number Coding Quick Reference (3RW40 / 3RW50)
Take `3RW4055-6BB44` as example
3RW: SIRIUS soft starter
40: 시리즈 코드
55: Current rating code
6: 나사식 터미널 (2 = spring-cage terminal)
BB / AB: Base hardware revision
4: Main voltage code
4: Control supply code
