Siemens MICROMASTER 430 VFD 90kW 380-480V 3-Phase Pump Fan Drive 6SE6430-2UD38-8FB0

Siemens MICROMASTER 430 VFD 90kW – Maximum F-Size Drive for Large Pump and Fan Systems

The Siemens MICROMASTER 430, model 6SE6430-2UD38-8FB0, delivers 90kW output power with 380-480V 3-phase input. This unfiltered variable torque drive represents the maximum power rating available in the F-size chassis within the MM430 series, designed for the largest pump and fan applications before transitioning to the FX-size chassis [12†L6-L8].

Key Specifications:
- Output Power: 90 kW (variable torque / square-law torque)
- Input Voltage: 380-480V AC 3-phase, +10/-10%, 47-63Hz
- Rated Output Current: 178 A
- Output Frequency: 0-600Hz
- Overload Capacity: 110% for 60s, 140% for 3s
- Protection Class: IP20
- Operating Temperature: -10°C to +50°C
- Dimensions (H×W×D): 850mm × 350mm × 320mm
- Weight: Approx. 90 kg
- Filter: Without built-in filter
- Frame Size: F

Typical Applications:
- Large industrial process pumps (90kW / 125 HP)
- High-capacity industrial fans
- Large HVAC central plant systems
- Large cooling tower fan arrays
- Municipal water/wastewater pump stations
- Industrial ventilation systems for large facilities

Key Features:
- Built-in PID controller for closed-loop regulation
- Linear V/f control with Flux Current Control (FCC)
- 6 digital inputs, 2 analog inputs, 2 analog outputs, 3 relay outputs
- 15 fixed frequencies, 4 skip frequencies
- BiCo technology for flexible I/O configuration
- Integrated RS-485 Modbus RTU interface
- Optional PROFIBUS-DP communication module
- Flying restart for spinning motor capture
- DC injection braking and compound braking
- Overload protection: 150% for 60 seconds [12†L12]

Pump & Fan Special Features:
- Multi-pump switching (staging up to 3 additional pumps)
- Bypass logic with automatic transfer
- Manual/Auto mode with switchover
- Dry well detection / belt break detection
- Energy saving mode with consumption monitoring
- Sleep mode for idle operation

F-Size Chassis Information:
The F-size chassis (850×350×320mm) is the largest F-size model in the MM430 series, providing maximum power in a compact footprint. This 90kW model is the direct replacement for the 75kW model when higher power is required.

Selection Guide:
The 90kW model is the maximum power rating in the F-size chassis. Choose 90kW when your pump or fan motor is rated 90kW (125 HP) or when the 75kW model is insufficient. For power requirements above 90kW, step up to the FX-size chassis with the 110kW model.

Important Notes:
- This product is discontinued. Available ONLY as a spare part
- A BOP or AOP is required for parameter changes beyond factory defaults
- SINAMICS G120 series is the recommended successor for new installations

FAQ:

Q1: What is the power range of the MM430 F-size chassis?
A: The F-size chassis covers three power ratings: 55kW (110A), 75kW (145A), and 90kW (178A). All share the same dimensions of 850×350×320mm (H×W×D), making them mechanically interchangeable.

Q2: What is the output frequency range?
A: Output frequency range is 0-600Hz [12†L8]. For most pump and fan applications, the practical range is typically 0-120Hz for standard induction motors.

Q3: Does this drive support 150% overload capacity?
A: Yes. The drive provides 150% overload capacity for 60 seconds [12†L12], allowing it to handle short-term surges from starting heavy loads or temporary overload conditions.

Q4: What communication protocols are supported?
A: Standard RS-485 Modbus RTU and RS-232 [12†L13]. Optional PROFIBUS DP module (6SE6400-1PB00-0AA0) is available as an accessory.

Q5: What is the maximum operating altitude?
A: Rated operation is up to 1000 meters above sea level. For higher altitudes, derating is required [12†L9].

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