Scholarlink

A rotary operator mechanism (ROM) external accessory is included with the MCCB. By converting the user-operated ROM knob rotation into a reciprocating slider motion, this accessory’s mechanism operates the MCCB knob that is directly connected to the MCCB. It prevents direct contact with the MCCB terminals and functions as a safety mechanism to assist in preventing such contact. Overcurrent in the MCCB causes the contacts to fuse together, activating a safety mechanism built into the device. The current MCCB system is set up and built in a way that guarantees the MCCB knob will always show the TRUE signal in this situation. However, the ROM standalone is unable to display the accurate indication of the MCCB with the PAD lock safety feature of the ROM because there are no forces present in the ROM. There is a significant issue with the ROM’s current design. Therefore, the current study consists of the development of a novel ROM mechanism to address the issue where the ROM fails to accurately display the PAD lock safety feature. Equations are developed using the static force balancing method to address the current ROM issue. A test setup has been created and built to make sure that the new mechanism works reliably and safely. For the endurance setup, concepts are being developed, and then, concepts are being chosen. The endurance test setup has been designed and implemented. The novel design of the ROM endurance test setup eliminates the need for human intervention in operation. The created endurance test setup is completely automated and does not need human involvement. Additionally, the implementation of the novel design has decreased the operational advance time from 16 to 24 h up to 8–10 h for 50,000 cycles of operation.

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Design and Development of Endurance Test Unit for the Design Modification of ROM for the Safety Enhancement of MCCB

  • 会议论文

  • 发表日期：

    2025年

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  • Shashikant J. Joshi,
  • Harsh Soni,
  • Dhaval B. Shah

摘要

A rotary operator mechanism (ROM) external accessory is included with the MCCB. By converting the user-operated ROM knob rotation into a reciprocating slider motion, this accessory’s mechanism operates the MCCB knob that is directly connected to the MCCB. It prevents direct contact with the MCCB terminals and functions as a safety mechanism to assist in preventing such contact. Overcurrent in the MCCB causes the contacts to fuse together, activating a safety mechanism built into the device. The current MCCB system is set up and built in a way that guarantees the MCCB knob will always show the TRUE signal in this situation. However, the ROM standalone is unable to display the accurate indication of the MCCB with the PAD lock safety feature of the ROM because there are no forces present in the ROM. There is a significant issue with the ROM’s current design. Therefore, the current study consists of the development of a novel ROM mechanism to address the issue where the ROM fails to accurately display the PAD lock safety feature. Equations are developed using the static force balancing method to address the current ROM issue. A test setup has been created and built to make sure that the new mechanism works reliably and safely. For the endurance setup, concepts are being developed, and then, concepts are being chosen. The endurance test setup has been designed and implemented. The novel design of the ROM endurance test setup eliminates the need for human intervention in operation. The created endurance test setup is completely automated and does not need human involvement. Additionally, the implementation of the novel design has decreased the operational advance time from 16 to 24 h up to 8–10 h for 50,000 cycles of operation.