SIEMENS 3WL9111-0AF03-0AA0 Motor Drive

Description

SIEMENS 3WL9111-0AF03-0AA0 Motor Drive

Product Dimensions：

The Siemens 3WL9111-0AF03-0AA0 is an internal Motorized Operating Mechanism (Charging Motor) designed specifically for the SENTRON 3WL series of Air Circuit Breakers (ACBs). It is an essential accessory used to automate the charging of the circuit breaker’s stored-energy spring mechanism.

Product Detailed Description

In large power distribution networks, Air Circuit Breakers (ACBs) require high mechanical force to close their main contacts. This force is stored in a heavy-duty internal spring. The 3WL9111-0AF03-0AA0 motor drive automatically winds (charges) this spring immediately after the breaker closes. This ensures that the breaker is always ready for a rapid reclosing sequence (an important feature for automated power restoration systems).

If control power is lost, the breaker can still be charged manually using its front-mounted hand lever.

Product Parameters

Product Advantages

• Remote Management: Enables full automation of power distribution systems by allowing SCADA or PLC controllers to charge the breaker remotely.
• Rapid Reclosing Support: Automatically charges the spring immediately after the breaker is closed, ensuring the breaker is instantly prepared to open and reclose if a secondary fault occurs.
• Flexible Dual Voltage Compatibility: Operates smoothly on both standard 110–125V DC battery banks (common in substations) and 110–127V AC control power networks.
• Seamless Internal Fit: Designed for drop-in installation directly inside the 3WL breaker chassis, requiring no complex external linkages or structural modifications.

Important Considerations & Precautions

• Lifecycle Status: This component belongs to the legacy SENTRON 3WL series. While widely available as a replacement or spare part, newer installations utilize the successor 3WA series (matching part: 3WA9111-0AF05).
• Power Supply Voltage: Verify that your control circuit matches the 110–125V threshold. Introducing a higher voltage (such as 220V) will immediately burn out the motor windings.
• Safety During Maintenance: Before installing or removing this motor, ensure that the circuit breaker is completely isolated from main power, switched OFF, and that the storage spring is fully DISCHARGED to prevent mechanical injuries.

Product Applications

The 3WL9111-0AF03-0AA0 motor drive is implemented anywhere high-power main distribution boards require automated oversight:

• Industrial Automation: Main low-voltage distribution boards in factories where automated power synchronization and grid transfer (ATS) are required.
• Data Centers & Critical Facilities: Integrated into Automatic Transfer Switches (ATS) to quickly shift power sources during an outage.
• Substations & Power Plants: Serving as a core mechanism within incoming and outgoing feeder breakers linked to automated network protection relays.
• Commercial High-Rises: Used for remote emergency shedding or restoration of major building electrical loads.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

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