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Deciding the area of cable for starting submersible motor pump in condition of far distance between the transformer and motor |
ZHANG Xian-liang, LING Gui-rong |
Hengyang Xiangnan Motor Works, Hengyang, Hunan 421001, China |
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Abstract In condition of far distance between the transformer and submersible motor pump,it needs a long cable to connect the both,which causes a large voltage drop and thus leads to unsuccessful submersible motor start.By analyzing the start torque,start current,and start voltage,we derived formulas to calculate the needed minimum area of cable and to calculate the maximum length of cable at certain area of cable for normally starting the motor.The example is given out to illustrate that the needed minimum area of cable is in proportion with rated current IN,the length of cable L,and inverse proportion rated voltage UN.These formulations can also be applied when connecting general motor with centrifugal pump.submersible motor;submersible motor pump;line voltage reduce;start torque;start voltage;needed minimum area of cable
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Received: 08 August 2013
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