The Siemens 3VW9724-0WF0 is a Motor Operator (Motorized Remote Operating Mechanism) designed for Siemens 3VA series Molded Case Circuit Breakers (MCCBs). This device enables remote electrical opening and closing of the circuit breaker, making it ideal for automated power distribution systems and applications where manual operation is inconvenient or unsafe. The motor operator charges the spring-closing mechanism via an electric motor when control voltage is applied. It is compatible with 3VA1, 3VA2, and 3VA5 series MCCBs, specifically supporting Frame sizes L (100A–160A) and N (250A). The device features universal voltage input (24V DC to 240V AC/DC depending on specific suffix variant), with operating time of approximately 150–250 ms after the spring is charged. The motor operator mounts on the right side of the 3VA MCCB and includes auxiliary contacts for indicating "Ready to Close" and "Motor Running" status. Typical applications include remote panel boards, automated switching systems, generator changeover panels, and industrial power distribution systems requiring remote control capability. Note: For breaker ON/OFF status feedback, a separate auxiliary switch (OF) or alarm contact (SD) must be added as the motor operator does not inherently communicate main contact position.
FAQ
Q: What does the Siemens 3VW9724-0WF0 do?
A: The 3VW9724-0WF0 is a Motor Operator that enables remote electrical opening and closing of Siemens 3VA series MCCBs. It charges the spring mechanism via an electric motor when control voltage is applied.
Q: Which Siemens circuit breaker series is this motor operator compatible with?
A: It is compatible with Siemens 3VA1, 3VA2, and 3VA5 series MCCBs, specifically for Frame sizes L (100A–160A) and N (250A). It does not fit Frame S (400A–630A) or Frame M (800A).
Q: What control voltage does the 3VW9724-0WF0 require?
A: The 3VW9724 series is a universal voltage device accepting 24V DC to 240V AC/DC. The specific suffix (e.g., 0WF0) indicates the voltage variant. Always verify the exact voltage rating on the device label.
Q: How long does it take for the motor operator to close the breaker?
A: The motor charging time is approximately 1.5 to 3 seconds. Once charged, the closing operation takes approximately 150–250 ms.
Q: Does the motor operator provide feedback on the breaker's ON/OFF status?
A: No, the motor operator indicates spring charging status ("Ready to Close" / "Motor Running") but does not indicate the main contact position. You must add a separate auxiliary switch (OF) or alarm contact (SD) for breaker ON/OFF status feedback.
Q: Can I manually operate the breaker if the motor operator loses power?
A: Yes, the motor operator includes a manual override (hand-crank or lever) that allows manual spring charging and operation when control power is lost.
Q: Where is the motor operator mounted on the circuit breaker?
A: It mounts on the right side of the 3VA MCCB. This increases the overall width of the assembly by approximately 52 mm and adds 60–70 mm of depth behind the breaker.
Q: What applications is the 3VW9724-0WF0 typically used for?
A: Typical applications include remote panel boards, automated switching systems, generator changeover (AMF) panels, and industrial power distribution systems where remote operation of the MCCB is required.
