3NA6144 SIEMENS

The ‌SIEMENS Power Board‌ is the core high-power energy conversion carrier for Siemens industrial drive and power electronic systems. As the hardware bridge between the low-voltage control unit and high-power power devices such as IGBTs, it undertakes core functions including high-current power distribution, power device drive amplification, voltage and current signal sampling, and over-current protection execution. It is natively matched with Siemens SINAMICS series frequency converters, servo drives, medium-voltage inverters and new energy converters, and is the key hardware foundation to ensure high-power energy conversion and stable output of the entire drive system.

Core Product Parameters

• ‌Power level coverage‌: Support rated power range from 0.75kW for small servo drives to 10MW for large medium-voltage frequency converters, covering low-voltage 24V DC~690V AC and medium-voltage 2.3kV~13.8kV voltage levels
• ‌Power device configuration‌: Integrated high-reliability IGBT, SiC MOSFET or high-power diode modules, with maximum single-channel output current up to 3600A
• ‌Sampling precision‌: Built-in high-precision current and voltage Hall sensors, with sampling accuracy up to 0.2% of full scale, meeting the requirements of high-precision vector closed-loop control
• ‌Protection performance‌: Natively integrates desaturation over-current protection, over-voltage/under-voltage locking, over-temperature detection and surge suppression functions, with protection response time less than 1μs
• ‌Insulation level‌: Reinforced insulation design between control side and high-power side, with withstand voltage up to 6kV AC, meeting IEC 61800-5-1 industrial safety standards
• ‌Heat dissipation design‌: Integrated liquid cooling or air cooling heat dissipation base, with maximum allowable operating temperature up to 85°C, supporting 150% overload operation for 60 seconds
• ‌Process standard‌: Surface coated with three-proof conformal coating, fully compliant with IPC-6012 Class 3 high-reliability circuit board manufacturing specifications, mean time between failures (MTBF) exceeds 800,000 hours
• ‌Operating environment‌: Industrial wide temperature range from -40°C to +85°C, IP20 protection rating, adapting to high-dust and high-vibration harsh industrial scenarios

Key Product Advantages

1. ‌Ultra-high energy conversion efficiency‌: Optimized power loop layout and low-loss power devices, the maximum system conversion efficiency can reach 98.5%, significantly reducing the energy consumption loss of high-power operation
2. ‌Fast fault protection response‌: Microsecond-level over-current detection and protection mechanism, which can quickly lock the drive output when the load is short-circuited, effectively avoiding permanent burnout of high-power IGBT devices
3. ‌High system matching‌: Natively calibrated and matched with Siemens control units and drive power stages, no extra complex parameter adjustment is required after replacement, and no resonance or extra loss will be generated
4. ‌Extreme environmental adaptability‌: High-Tg substrate and three-proof coating design, which can stably operate in harsh scenarios such as high temperature, high humidity, dust and corrosive gas in heavy industry
5. ‌High integration and high reliability‌: Highly integrated design integrates power devices, sampling circuits and protection circuits, no extra discrete power components are needed, greatly reducing the volume and failure points of the power unit

Important Notes

• Before installation, confirm that the model, power level and hardware version of the Power Board are completely consistent with the original drive equipment, and mismatched versions may lead to insufficient drive capability or even power device burnout
• The high-power copper bar terminals must be tightened according to the specified torque value, otherwise poor contact will cause local overheating, which will burn out the circuit traces and power devices during high-current operation
• It is strictly forbidden to power on the high-voltage DC bus before the low-voltage control power supply is stable, otherwise the power device will be directly turned on abnormally and cause short-circuit damage
• When performing maintenance, the residual voltage on the DC bus capacitor must be fully discharged before operation, to avoid electric shock or instantaneous high-voltage surge burning out the circuit
• Regularly check the heat dissipation channel and the surface dust accumulation of the Power Board every 6 months, and use dry low-pressure compressed air for cleaning to prevent dust from causing insulation reduction and overheating