The new standard IEC 60034-30-3 on the efficiency classes of HV AC motors has finally been published on February 15, 2024.
Fixed-speed tree-phase high-voltage cage induction motors in accordance with IEC 60034-1 that
- have a rated voltage exceeding 1000 V, but not exceeding 11000 V;
- 50 Hz or 60 Hz supply with sinusoidal voltage;
- have a rated power from 200 kW to 2000 kW;
- have two, four or six poles;
- are rated for single-speed line-operation;
- are intended for direct-on-line starting at rated or at reduced voltage and rated frequency;
- are constructed to any degree of protection IP;
- are designed for cooling methods IC411, IC511, IC611, IC01 or IC81W;
- are capable of continuous operation at their rated operating point (torque/power, speed) with a temperature rise within the specified insulation temperature class;
- are rated for any ambient temperature or coolant temperature within the range of -20°C to +60°C;
- are rated for an operating altitude up to 2000 m above sea level;
- have a locked-rotor current Id at stand-still and supply with rated voltage and frequency befor application of any IEC or agreed tolerance in the range Id/In greater than or equal to 4.5;
- are designed for a minimum locked-rotor steady state supply voltage at least 80% of the rated voltage during starting;
- Motor with mechanical commutators or slip-rings;
- Motors with 8 or more poles
- Multi-speed motors;
- Motors designed specifically for operation fed by a power electronic frequency converter with a temperature rise within the specified insulation thermal class or thermal class;
- Motors completely integrated with the driven machine;
- Submersible motors;
- Smoke extraction motors;
- Motors dedicated to operate in explosive atmospheres;
- Motors for operation in nuclear plants;
- Motors designed to drive loads whose starting torque and/or inertia exceed the values defined in the standard;
Standard available for sale on the IEC website: IEC 60034-30-3:2024 | IEC Webstore
