Contacteur,disjoncteur,capteur,Encodeur,API,Convertisseur
Discontinué (Siemens stopped delivery effective Oct 01, 2023), legacy obsolete model. Factory recommended replacement: 3RW5055-6AB14
- Répartition des numéros de commande
3RW: SIRIUS démarreur progressif série
40: Basic soft starter, contournement intégré, 2-phase thyristor control (Phase L1, L3)
55: S6 frame, rated current code 134A
6: Bornes à vis
BB: Configuration standard
4: Control supply AC230V
- Spécifications électriques de base
| Article | Paramètre |
| Modèle | 3RW4055-6BB44 |
| Cadre | S6 |
| Rated operational current Ie (40℃) | 134 UN |
| Rated motor power @400V,40℃ | 75 kW |
| Main circuit voltage Ue | AC 200～460V |
| Alimentation de contrôle | C.A. 230 V |
| Fréquence | 50/60Hz |
| Built-in bypass contactor | ✅ Oui. Bypasses thyristors after start to reduce heat generation |
| Protection contre les surcharges du moteur | ✅ Integrated motor overload protection (Classe 10) |
| Current limiting function | ✅ Adjustable current limit |
| PTC thermistor motor protection | ❌ Non pris en charge |
| Inside-delta connection | ❌ Non pris en charge, standard external connection only |
| Classe de protection | IP00 |
| Dimensions hors tout (H × L × P) | 198 × 120 × 250 mm |
| Poids | 4.976 kilos |
- Ambiant & Conditions d'installation
- Température ambiante: -25℃ ~ +60℃. Derating required above 40℃; rated current reduces to 100A at 60℃
- Altitude d'installation: Max 5000m. Derating required above 1000m; main circuit upper limit reduced to 460V above 2000m
- Max cable length from soft starter to motor: 300m
- Installation clearance: ≥100mm top, ≥5mm side, ≥75mm bottom
- Degré de pollution: 3 (CEI 60947-4-2)
- Description de la fonction
2-phase thyristor voltage regulation soft start, by-pass intégré. 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: pompes à eau, les fans, compressors and general loads. Not suitable for frequent heavy-duty starting
- Sélection & Options de remplacement
- Factory direct upgrade model: 3RW5055-6AB14 (New 3RW5 generation)
Same rating 134A /75kW@400V, AC230V control, bornes à vis; enhanced protection, optional communication module
- Domestic alternative candidates (même note actuelle): Renle, Xipu, Chint, Delixi soft starters, 134Une classe.
- Guide de dépannage (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
- Déclenchements fréquents: Check harmonic distortion and whether semiconductor fast fuses are fitted upstream
Tableau de comparaison: 3RW4055-6BB44 VS 3RW5055-6AB14
3RW4055-6BB44: Discontinued legacy unit; 3RW5055-6AB14: Factory recommended replacement, borne à vis, contournement intégré, 2-phase thyristor soft starter
| Article de comparaison | 3RW4055-6BB44 | 3RW5055-6AB14 | Remarques |
| Numéro de commande. | 3RW4055-6BB44 | 3RW5055-6AB14 | Official direct replacement by Siemens |
| Série de produits | SIRIUS 3RW40 (Basic Soft Starter) | SIRIUS 3RW50 (New Generation Basic Soft Starter) | 3RW40 discontinued since Oct 2023 |
| Rated operational current Ie @40℃ | 134 UN | 143 UN | 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 |
| Alimentation de contrôle | Fixed AC230V | Wide range AC110～250V | Key difference: universal control supply for 110V/220V |
| Thyristor control phases | 2-contrôle de phase (L1, L3) | 2-contrôle de phase (L1, L3) | Same topology, no modification required for primary power circuit |
| Built-in bypass contactor | ✅ Oui | ✅ Oui | Thyristor bypass after start for low running loss |
| Protection contre les surcharges | Integrated motor overload Class10 | Integrated electronic overload Class10 | Same protection class |
| PTC thermistor motor protection | ❌ Non pris en charge | ❌ Non pris en charge | Neither has PTC input |
| Inside-delta connection | ❌ Non pris en charge | ❌ Non pris en charge | 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 |
| Sortie analogique | ❌ None | ✅ Built-in 4~20mA (configurable to 0~10V) | Transmit current/load signal to PLC |
| Communication port | ❌ No communication, non extensible | ✅ 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 |
| E/S numériques | 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 |
| Classe de protection | IP00 | IP00 | For cabinet mounting only |
| Dimension (H × W × D mm) | 198 × 120 × 250 | 200 × 120 × 240 | Même largeur, similar height, shorter depth; trous de montage compatibles |
| Poids net | 4.976 kilos | 4.0 kilos | New model lighter |
| Température ambiante | -25℃ ~ +60℃ | −25℃ ~ +60℃ | Derating required at high temperature for both |
| Max motor cable length | 300 m | 300 m | Identique |
| Installation clearance | ≥100mm top, ≥5mm side, ≥75mm bottom | ≥100mm top, ≥5mm side, ≥75mm bottom | Same installation space requirement |
| Degré de pollution | 3 (IEC60947-4-2) | 3 (IEC60947-4-2) | Identique |
| Cycle de vie | Discontinué, spare parts limited | En production, regular stock | Preferred model for retrofit & new projects |
Points clés de la mise en œuvre du remplacement (Focus ingénierie)
- Primary power circuit: Entièrement compatible. 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: Courant nominal du moteur, 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, aucune communication, 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, contournement intégré, series of target model)
Main circuit AC200~460V, contournement intégré, Class10 motor overload protection. Suffix defines terminal type, control supply and PTC option; @40℃, rated motor power at 400V.
| Numéro de commande. | Cadre | C'est à dire(UN) | Motor Power @400V(kW) | Remarques |
| 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 |
Supplémentaire: 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, contournement intégré, aucune communication, 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, contournement intégré, 2-phase thyristor, wide control supply AC110~250V; built-in 4~20mA analog output, optional Profinet/Modbus module, pump soft stop function.
| Numéro de commande. | Cadre | C'est à dire(UN) | Motor Power @400V(kW) | Remarques |
| 3RW5024-6AB14 | S0 | 12.5 | 5.5 | Borne à vis, wide range control supply |
| 3RW5026-6AB14 | S0 | 25 | 11 | Borne à vis, wide range control supply |
| 3RW5027-6AB14 | S0 | 32 | 15 | Borne à vis, wide range control supply |
| 3RW5028-6AB14 | S0 | 38 | 18.5 | Borne à vis, wide range control supply |
| 3RW5036-6AB14 | S2 | 45 | 22 | Borne à vis, wide range control supply |
| 3RW5037-6AB14 | S2 | 63 | 30 | Borne à vis, wide range control supply |
| 3RW5038-6AB14 | S2 | 72 | 37 | Borne à vis, wide range control supply |
| 3RW5046-6AB14 | S3 | 80 | 45 | Borne à vis, wide range control supply |
| 3RW5047-6AB14 | S3 | 106 | 55 | Borne à vis, wide range control supply |
| 3RW5055-6AB14 | S6 | 143 | 75 | Screw terminal AC110~250V (Official replacement for 3RW4055-6BB44) |
| 3RW5056-6AB14 | S6 | 171 | 90 | Borne à vis, wide range control supply |
| 3RW5072-6AB14 | S12 | 210 | 110 | Borne à vis, wide range control supply |
| 3RW5073-6AB14 | S12 | 250 | 132 | Borne à vis, wide range control supply |
| 3RW5074-6AB14 | S12 | 315 | 160 | Borne à vis, wide range control supply |
| 3RW5075-6AB14 | S12 | 370 | 200 | Borne à vis, wide range control supply |
| 3RW5076-6AB14 | S12 | 470 | 250 | Borne à vis, wide range control supply |
| 3RW5077-6AB14 | S12 | 570 | 315 | Borne à vis, wide range control supply |
Supplémentaire: 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 (Référence de sélection)
- 3RW30: Entry-level basic model, 2-phase, contournement intégré, low power range, no PTC, aucune communication; lower grade than 3RW40
- 3RW44: Legacy high-performance type (abandonné). 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 & compresseurs; 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: Code de série
55: Code de classification actuel
6: Borne à vis (2 = spring-cage terminal)
BB / AB: Base hardware revision
4: Main voltage code
4: Control supply code
