● According to the standard: GB/T3906-2020 GB/T3804-2017 BG/T16926-2009 GB/T1985-2023 DL/T404-2018 DL/T486-2021
● Rated voltage: up to 12 kV
● Frequency: 50Hz
● Rated current: 630A
● Maximum breaking capacity of the circuit breaker: 31.5kA
● Load switch withstand current: 20kA
● Short time withstand current of the main circuit: 20 kA for 4s

● The ring main unit features a cabinet made from aluminum-zinc-coated steel or cold-rolled steel plates, which are bent and assembled to create a lightweight and aesthetically pleasing design. The unit is versatile, with a complete range of options for installation and easy expansion. The main switching components use either compressed-air or vacuum load switches andtheir combinations. It is compact, maintenance-free, and has a three-phaselinkage structure with clear isolation breaking points. 

● The load break switches and combination devices can be installed in various configurations, including side or top expansion, and it includes a reliable mechanical linkage and interlocking mechanism that achieves the “Five Preventive Interlocking” function. 

● The unit is operated from the front with protective features and can be wall mounted securely. It supports both manual and electric operation, with remote control capabilities. 

● Load break switches are equipped with linked protective insulation doors or transparent insulation covers to shield live contacts, ensuring personnel safety.