SF6 circuit breaker to be installed devices:1. equipment arrives at the site, and the general contractor and the owner *** with the unpacking inspection, check the equipment specifications and models and the actual consistency, and make a good record of the unpacking. 2. Since the circuit breaker is charged with 0.3 Bar of SF6 gas for protection in the main circuit breaker during transportation and storage, SF6 gas pressure test should be carried out before the circuit breaker is ready to be installed, and a normal pressure indicates that the circuit breaker is in good condition. Detection method is as follows: (1) loosen the pressure gauge cover 1 on the SF6 equipment, install the inflatable connector 3; (2) loosen the plug 4 on the inflatable connector, connect the 0-1MPA standard pressure gauge to the inflatable connector to confirm whether the pressure is normal or not; (3) loosen the pressure gauge connected to the inflatable connector, install the plug 4 to the inflatable street, and then loosen the inflatable plug, and then install the plug 1 to the equipment again. Pressure gauge, tighten by hand; 3. After the pressure check is normal, use the special tools provided by the manufacturer to lift the SF6 circuit breaker; 4. by the professional crane driver commanded by the crane driver, smoothly and slowly lift the SF6 equipment to the pre-made mark, remember, in the lifting must make the balance of the SF6 equipment. 5. after lifting SF6 equipment to the base plane, adjust the position of the equipment according to the axis, adjust the height with a leveling tester, insert V-shaped shims between the equipment bracket and the base platform, the V-shaped shims are provided by the manufacturer, the thickness of which ranges from 1mm to 6mm, and when doing the height adjustment, use the calibrated jackhammer to find a good support point and raise it up slowly, and make sure that you make a support point in the main structure or else it will harm the equipment, and the overall level of the equipment should be controlled at +1mm. The overall leveling of the equipment should be controlled within +1mm. 6. 6. equipment adjustment, with M16 double-head bolts fixed SF6 circuit breaker, torque 160N.M. 7. in the equipment bracket has manufacturers reserved grounding bolt holes, from the grounding network to lead two grounding wire to the equipment, crimp terminals, fastened securely, there is a relaxation measures, the grounding wire for the 185mm2 bare copper wire.