The measurement of unbalance current in the maintenance of capacitor bank is also one of the important works.When the unbalanced current exceeds the standard

the capacitor in the capacitor bank normally needs either replacement or reconfiguration so to assure the balance of four bridge arms.However

the above method has such disadvantage in the maintenance as large maintenance work.Therefore

the cause of unbalanced current in capacitor bank is analyzed firstly

that is

the product of capacitance of two sets of diagonal bridge arm in the four bridge arm is unequal.The method to reduce the unbalanced current is deduced by the formula.Then

the measurement method of unbalanced current in the maintenance is introduced.When the unbalanced current exceeds standard

it is proposed

in accordance with the deduced formula

to the product difference of capacitance of two sets of diagonal bridge arm by way of adjustment of the bottom capacitor

thus reducing the unbalanced current.The close combination of the proposed method and production site saves both time and effort and has promotion and application value.