Motor Protection

 
Protection against overload

'Each electric motor having a rating exceeding 0.37kW shall be provided with control equipment incorporating means of protection against overload of the motor'.

 
Protection against over-temperature

'Any unattended single-phase motor having a current draw greater than 1.0 Amp, or any unattended three-phase motor having a current draw greater that 0.578 Amps, shall be fitted with an over-temperature protection device'.

 
Over-temperature protection devices

'Protection of motor windings against excessive temperatures shall be provided by thermal-overload protective devices complying with AS1023.1 or by a device which affords an equivalent degree of protection'.

 

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