Schneider 140PLC maintenance; PLC maintenance; Mitsubishi plc maintenance; converter repair Schneider; Schneider TSXPLC maintenance; converter repair West Germany; Omron plc maintenance; Kymmene inverter repair; Siemens s5PLC maintenance; Hitachi plc maintenance; Raynor soft-start maintenance ; Yaskawa maintenance; drive repair Yaskawa G7; Siemens 200cn PLC maintenance; Siemens converter repair; Yaskawa G5 Inverter maintenance; Siemens 6RA27 DC governor maintenance; Siemens DC governor repair; Siemens PLC maintenance; Siemens 6RA28 DC converter repair; Siemens 6ra70 DC drives repair; board maintenance; basic characteristics of frequency motor overload is the actual temperature exceeds the rated temperature rise. Therefore, the inverter motor overload protection purposes but also to ensure the normal operation of variable frequency motor drive repair professional, not because of overheating and burning. The motor is running, the loss of power (mainly copper loss) is bound to be converted into heat energy converter repair Schneider, the temperature of the motor increases. The heating process of the motor thermal equilibrium transitional process, which is similar to the common basic law exponential rise (or fall) law. Its physical meaning is: Since the motor at elevated temperatures at the same time, must want to heat, the greater the temperature, the faster the heat, so the temperature does not rise linearly laws, but the slower the rise around; when generated by the motor When the heat balance and heat divergence, when the temperature rise is the rated temperature rise. Motor overload refers to mechanical overloading of the motor shaft, the motor operating current exceeding the rated value, and led to its rise also exceeded the rating. General Motors is the main features of overload: inverter maintenance problems set the input voltage fluctuation What requirements are generally fairly wide input voltage range, it basically can adapt to any region of the country?. However, when you install must first check the input voltage. ① low allowable voltage range:. 380v-15% = 323v (excess load drive repair, the current increases) High value: 460v + 10% = 506v by contactors and fan constraints (18.5kw above) is less than 15kw dc excitation . . ② more than the allowable voltage range limit: undervoltage protection (lv), the drive will stop (about 300v) Limit: overvoltage protection (ov) drive repair experts, the drive will also stop * Input voltage more than 506v, ov can not protect the contactor, fan. * Rectifier voltage withstand capability 1600v, generally not due to over voltage damage .③. For input voltage fluctuation, usually avr (regulated) feature will work automatically. Siemens drive repair drive repair _ _ Dalian, Shenyang on China on China by Shenyang Electric Electric Limited. Shenyang Electric Co. on people (www.zsmsy.com) (www.smdqee.com) strong, credible, and other industries in other Shenyang, Liaoning province has accumulated a large number of loyal customers. The company better work attitude and constantly improve the innovative ideas will lead sink into the brilliant electric and you work for a better future!