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Certified and compliant to ATEX 94/9/EC, the integrated thermistor input is designed for the temperature supervision of motors that are placed in potentially hazardous areas. In contrast to a typical system with a separate thermistor relay and contactor, a thermistor input can be fully integrated into the drive. This feature simplifies the use ofdrives together with Ex motors, that are designed and certified for use in potentially explosive environments. If overtemperature is detected, the drive immediately stops feeding energy to the motor and thus further heating of the motor is avoided. As no external components are needed, the cabling is kept to a minimum. This improves reliability andsaves both space and costs. Explosive atmospheres where supervision of motor temperatures is required are widely found in the chemical, petrochemical, marine, metal, mining and oil drilling industries. The thermistor input is available for the Vacon NXP drives in the power rangeof 0.75kW – 5MW in voltages 380-500V and 525-690V.
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