CKJ11-3000 vacuum contactor is the high-tech product we independent research and developed, passed the electric performance test, ambient experiment, shock and vibration test of the certification authority. The prototypes have been approved by customers. Currently the capacitance of CKJ11-3000 vacuum contactor is the largest in low voltage vacuum contactors at home and abroad, which can be used in the field of solar energy, wind power generation equipment, large smelting and transportation equipment, etc