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Load break switch panel SF6 Ring Main Unit
Advanced facilities and process
With the laser cutting and puching machines imported from TRUMPF(Germany), the accuracy of re-location can be 0.02mm; the cutting deviation can be less than 0.05mm, which ensures that before welding the gaps between plates of gas tank are smaller than 0.1mmThe three-dimension and five-axis laser welding system, also from TRUMPF, with welding laser beam of 0.1mm and under protection of Helium gas, welds the stainless steel plates, the welding quality equals to bended steel plates, which ensure the gas tightness and uniformity of all gas tanks.The fully automatic and integral helium leak detection system, made by SEILER Vakuumtechnik GmbH, through detecting of Helium leakage, brings gas leakage rate per year down to less than 0.02%, ensuring the life span of gas tank of over 30 years.Main Technical data
| Description | Unit | ||
| Rated Voltage | kV | 12 | 24 |
| power frequency withstand voltage(1min)phase to phase | kV | 42 | 50 |
| power frequency withstand voltage(1min)between open contacts | kV | 48 | 64 |
| Rated frequecy | Hz | 50,60 | 50,60 |
| Rated current | A | 630 | 630 |
| Rated short circuit breaking current | kA | 50 | 50 |
| Mechnical lifetime | Ops. | 5000 | 5000 |
| Protection degree | IP4X | IP4X | |