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| مكان المنشأ | ألمانيا |
| اسم العلامة التجارية | Siemens |
| إصدار الشهادات | CE RoHS |
| رقم الموديل | 3RT2027-1AP00 |
The Siemens 3RT2027-1AP00 is a 3-pole power contactor from the SIRIUS 3RT2 series, designed for switching AC induction motors in industrial machinery, production lines, and building services installations. With a 32A rating and 15kW capacity at 400V, it handles motor switching requirements for mid-sized applications including conveyor drives, pump motors, compressors, and HVAC systems.
Part Number: 3RT2027-1AP00
Manufacturer: Siemens AG
Product Family: SIRIUS 3RT2
Type: 3-Pole Power Contactor (AC Motor Switching)
| Parameter | Value |
|---|---|
| Part Number | 3RT2027-1AP00 |
| Manufacturer | Siemens |
| Product Series | SIRIUS 3RT2 |
| Utilisation Category | AC-3e / AC-3 |
| Main Contact Configuration | 3 NO (3-pole) |
| Rated Current (AC-3, 400V) | 32 A |
| Motor Rating | 15 kW @ 400V / 7.5 kW @ 230V |
| AC-1 Current (non-inductive) | Up to 50 A |
| Coil Voltage | 230V AC, 50 Hz |
| Integrated Auxiliary | 1 NO + 1 NC |
| Size | S0 |
| Connection | Screw terminals |
| Insulation Voltage (Ui) | 690 V |
| Impulse Withstand Voltage | 6 kV |
| Degree of Protection | IP20 |
| Ambient Temperature | −25°C to +60°C (with derating above +40°C) |
| Mechanical Life | Up to 10 million operations |
| Certifications | IEC, UL, CSA, CE, CCC, RoHS |
| Weight | Approx. 0.46 kg |
| Dimensions (H×W×D) | 85 × 45 × 97 mm |
The AC-3 (and enhanced AC-3e) utilisation category defines the contactor's designed switching duty for squirrel-cage induction motor starting and stopping. This includes closing under full locked-rotor current and opening at running speed - the most common industrial motor switching duty.
The 32A AC-3 rating indicates the contactor can switch motors drawing up to 32A at running speed while handling the associated inrush current during startup. For less demanding applications like resistive loads, the AC-1 rating allows handling up to 50A.
The 3RT2 contactor features standardized mechanical dimensions and interfaces that align with the SIRIUS modular system. This enables direct integration with compatible components:
This modular approach reduces design complexity, wiring time, and ensures predictable space requirements in control panels.
The 230V AC coil energizes when voltage is applied between A1 and A2 terminals. The coil draws higher inrush current during initial energization, settling to lower holding current once seated. Standard practice includes using surge suppressors across A1-A2 terminals when driven by PLC outputs to protect against inductive kickback voltage spikes.
Chattering typically indicates a coil voltage problem. Measure voltage directly at the A1-A2 terminals during operation to ensure it remains above the minimum holding threshold. Check for voltage drops from long cable runs, undersized conductors, or loose connections.
The contactor itself doesn't affect overload relay tripping. Verify the motor's starting current profile matches the relay's settings and ensure the relay is set for the motor's actual full-load current, not the contactor's rated current.
Yes, the 3RT2027-1AP00 is the direct successor to the 3RT1027-1AP00. Mechanical dimensions, mounting interfaces, electrical ratings, and SIRIUS accessory compatibility are maintained across the transition.
Mechanical life reaches approximately 10 million cycles. Electrical life under AC-3 duty typically ranges from 1-3 million operations at rated current, depending on switching frequency and current levels.
Yes, derating applies above 40°C ambient. Consult the product datasheet for exact current values at 50°C. If the derated current remains above the motor's full-load current, the contactor can be used; otherwise, specify the next size up.
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