First, use 
 Starter switch is rated for underground mine 6KV, 10KV, rated current not exceeding 400A, frequency 50HZ three-phase AC grounded neutral point does not directly control the power supply system, protection, measuring, and as a direct high voltage motor starter use 
 Technical data 
 1. Rated voltage: 6KV, 10KV 
 2. Rated current: 50A, 100A, 200A, 300A, 400A 
 3. The maximum operating voltage: 7.2KV, 12KV 
 4. Rated short-circuit breaking current: 12.5KA 
 5. Rated short-circuit Views: 30 
 6. Rated short circuit current (peak): 31.5KA 
 7. Rated thermal steady-state current: 12.5KA 
 8. Rated current breaking times: 10000 times 
 9. Mechanical Life: 10000 times 
 10. Isolated bolt Mechanical life: 2000 times 
 11. Breaker closing operation of electric voltage: AC switch on 100V, 24V line current sub-gate control, protection, measuring, and as a direct use in high voltage motor starter.