Siemens MICROMASTER MM400 VFD 1.5kW 380-480V 3-Phase 6SE6420-2UD21-5AA1

Siemens MM400 VFD 1.5kW – Built for Continuous Industrial Operation

The Siemens MICROMASTER MM400, model 6SE6420-2UD21-5AA1, delivers 1.5kW output power. This model bridges the gap between compact drives and larger chassis units, offering higher power while still fitting in standard 173mm height cabinets.

Key Specifications:
- Output Power: 1.5kW (constant torque)
- Input Voltage: 380-480V AC 3-phase, 50/60Hz
- Rated Output Current: 3.9A
- Built-in Filter: Class A
- Protection Class: IP20
- Operating Temperature: 0°C to 50°C
- Dimensions: 173mm × 73mm × 149mm
- Weight: 1.4kg

Typical Applications:
- Medium industrial conveyors
- Centrifugal pumps (5-15 HP range)
- Large exhaust fans (12-18 inch diameter)
- Small screw compressors
- Industrial washers and dryers

Why This Model?
The 1.5kW model operates at higher efficiency than smaller drives when driving motors in the 1.1kW-1.5kW range. Field data from a textile mill shows 6% lower energy consumption compared to using a 2.2kW drive for the same load. The drive also features improved thermal management for 24/7 operation.

Selection Guide:
Choose 1.5kW when your motor is rated 1.5kW or when you need headroom above 1.1kW. For constant torque applications (conveyors), match drive rating to motor rating. For variable torque (pumps/fans), the 1.5kW drive can often handle 2.2kW motors due to the square-law torque curve.

FAQ:

Q1: Can this drive a 2.2kW pump?
A: Yes for centrifugal pumps. Pump power follows the affinity law (power ∝ speed³). At full speed, a 2.2kW pump draws 2.2kW, so a 1.5kW drive would be undersized. But for variable speed operation below rated speed, it often works. Consult pump curve for confirmation.

Q2: What is the continuous output current at 40°C?
A: 3.9A up to 40°C ambient. Derate 2.5% per °C from 40°C to 50°C. At 50°C, maximum continuous current is approximately 3.3A.

Q3: Does this support external 24V control power?
A: Yes. Terminals 1 and 2 accept 24V DC external supply, allowing the control board to remain active when main power is off – useful for maintaining communication and parameter storage.

Q4: What protection features are included?
A: Over-voltage, under-voltage, over-current, short-circuit, ground fault, over-temperature, and motor overload (I²t). All protection parameters are user-adjustable.

📦 In Stock | Tech Support | Volume Discounts
Contact us for pricing and availability.
 

FAqS