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**Iec 60034 Part 30 Pdf Downloadl**

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This part of IEC 60034 specifies efficiency classes for two-speed electric motors that are rated according to IEC 60034-1 or IEC 60079-0, and have a two-speed ratio of less than 1000:1. This part of IEC 60034 specifies efficiency classes for two-speed electric motors that are rated according to IEC 60034-1 or IEC 60079-0, and have a two-speed ratio of 1000:1 or greater. This part of IEC 60034 specifies efficiency classes for three-speed electric motors that are rated according to IEC 60034-1 or IEC 60079-0, and have a three-speed ratio of less than 1000:1. This part of IEC 60034 specifies efficiency classes for three-speed electric motors that are rated according to IEC 60034-1 or IEC 60079-0, and have a three-speed ratio of 1000:1 or greater. The concept of efficiency class is defined in the standard as a function of a combination of output power and torque. The output power is given by the product of the maximum output current and the maximum output voltage and it is directly proportional to the mechanical power that the motor is delivering to the output load. It is therefore possible to build an efficiency class by adjusting the maximum output voltage. Theoretical Efficiency of Electric Motors Theoretical efficiency is determined by the maximum output current and maximum output voltage, expressed in NEM. In the case of single-speed motors: where is the maximum output current, is the maximum output voltage, is the rated mechanical power, is the maximum rotational speed. In the case of two-speed motors: In the case of three-speed motors: This implies that if the maximum output current is limited to, the theoretical efficiency can be increased as long as the maximum output voltage is allowed to increase (in the single-speed case) or to decrease (in the two-speed case). References External links NEMA Standards Category:Electrical standardsQ: nested hyperlinks not showing on datagridview I have a datagridview

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