ABB 3AXD50000021406 QVAR-781 Charging Control Board
- Warranty： 365 days
- Quality: Original module
- Condition： New / Used
- Warehouse: Spot
- Delivery time: Shipped in 3 days after payment
- Mailbox：plcvarious@foxmail.com
Introduction
1.Function
- Pre-charging & Capacitor Charging Regulation Manage the soft pre-charging sequence for the DC-link capacitors inside ABB variable frequency drives. It limits inrush current during drive power-up, avoiding large current spikes that damage power semiconductors and capacitors.
- Multi-layer Power Protection Integrate overvoltage, undervoltage, overcurrent, short-circuit protection and temperature monitoring. Automatically trigger protection actions and implement power derating when overtemperature occurs.www.plcva.com
- Power Signal Sampling & Monitoring Continuously sample DC bus voltage, charging current and board temperature, feed real-time status data back to the drive main control unit.
- Industrial Communication Interface Support RS-485 and CAN bus communication, compatible with Modbus RTU/TCP protocols. Exchange operational data, alarm codes and diagnostic information with the drive controller and upper-level automation systems.
- Hardware Self-diagnosis & Fault Logging Detect circuit anomalies, track charging status and record fault events. Generate alarm signals for drive fault diagnosis and maintenance troubleshooting.
- Modular spare replacement design Compact PCB assembly. It can be replaced as a spare part when the original charging control board fails, restoring the drive’s DC pre-charging and power protection functions.www.plcva.com
ABB 3AXD50000021406 QVAR-781 Charging Control Board Physical photo
ABB 3AXD50000021406 QVAR-781 Charging Control Board Physical photo
2. Applications
- Installed inside ABB variable speed drive cabinets, acting as the dedicated charging control unit for drive DC-link power circuits.
- Core maintenance spare part for ABB industrial frequency converters.
- Typical industries: Metallurgy, mining, water treatment, oil & gas, paper making, HVAC, factory production lines.
ABB 3AXD50000021406 QVAR-781 Charging Control Board Physical photo
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