Taking the motor control circuit of a water injection booster pump for an offshore oil platform as the main research object,and aiming at improving the reliability and speed of contactor suction,a calculation method for the transient voltage drop of the control circuit in the current distribution system of offshore oil platform is proposed,and the automatic check system of control voltage transient voltage drop is developed and used to check the voltage drop of the low-voltage control circuit of the platform.The design scheme of long distance control circuit is put forward and implemented,and the detailed reasons of slow and unstable suction speed of contactor are explained,which provides technical reference for the safety and environmental protection of offshore oil platform and the operation control of electric equipment in the process.
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