Electric learning dribs and drabs

The choice of cable specification:low pressure parts,we are usually calculated according to current loop,again on this foundation to set aside 35% of the allowance (that is,computing current divided by 0.65),according to the results single phase induction motor compared with the current carrying capacity of the cable select cable; High pressure parts,wholesalemotor.blogspot.com it is in the loop on the basis of the calculation of cable set aside 20% of allowance,which is divided by 0.8 Electrical single phase asynchronous motor five prevention:1 to prevent false points,or circuit breaker.2 to prevent loading and isolating switch.3 prevent charged hang (us) ground wire (switch).4 with a ground wire (switch) circuit breaker (isolating switch).5 prevent straying into charged interval.The low voltage side of transformer is electric motors price quick break according to escape (maximum short-circuit current) three-phase short-circuit current setting.