In modern power distribution networks, the high voltage load break switch (LBS) plays a key role in ensuring safety, reliability, and maintainability. For 24kV systems, these switches are commonly integrated into ring main units (RMUs), forming the backbone of medium-voltage distribution in industrial, commercial, and utility applications.
The 24kV load break switch is designed to handle rated operating currents while safely interrupting load currents under normal conditions. Unlike circuit breakers, it is not intended for fault interruption but rather for isolating and switching functions in RMUs. In a typical RMU configuration, the LBS allows operators to sectionalize the network, isolate faults, and maintain sections without disturbing the entire system.
Performance-wise, a high-quality 24kV LBS features SF₆or vacuum insulation, mechanical endurance exceeding 10,000 operations, and reliable arc-quenching performance. The switchgear enclosure is often stainless-steel sealed, ensuring long-term operation even in harsh outdoor or coastal environments. Key parameters include rated voltage (24kV), rated current (630A or 1250A), and short-time withstand current (16kA/25kA for 3s), aligning with IEC 62271-103 standards.
Choosing the right LBS for RMU applications depends on system configuration, network load, and insulation medium. In urban distribution grids, SF₆-insulated LBSs provide compactness and low maintenance. In environmentally focused projects, vacuum LBSs are increasingly preferred for their eco-friendly performance.
Putai offers a wide range of high voltage load break switches designed for 12kV, 24kV, and 36kV RMU systems. Each model combines compact design, reliable switching, and tested safety performance — ideal for modern distribution networks. Contact Putai for reliable and customized RMU solutions that meet international standards.
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