Anti-Condensation Heaters
All motors in excess of 5 kW shall be provided with heating devices to prevent condensation
during periods of idleness.
Heaters shall be of a fully insulated design, long life, and low temperature strip type.
Heaters shall be arranged to provide uniform heating of the stator and rotor windings, if
applicable, and shall maintain the temperature of the machine windings at approximately 5 °C
above ambient temperature.
The surface temperature of the heater element or the machine enclosure shall not exceed the
limiting temperature specified.
The connecting leads of the heater elements for motors in excess of 200 kW shall be brought
out to terminals in a separate heater terminal box mounted on the machine frame.For smaller
motors, the space heater auxiliary terminals may be completely segregated from the motor
main terminals, in a separate compartment.A prominent warning label shall be provided to
indicate that the circuit may be live when the motor is stationary.
The supply voltage and frequency shall be as stated on the data sheets.
根据字面上的意思,可以看出来是除湿加热器。要求电机温度近似大于环境温度5度。 |