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  • Edgar Desautels

Basics of electricity

Updated: Sep 4, 2019


How to choose voltage rating for fans?

It depends on the power distribution system you are using.Here's the various voltage used in North America.

How to choose frequency rating for fans?

It depends on the power distribution system you are using. Consult your electrical contractor.


For now,all of our fans use induction motors.The velocity at which an electric induction motor operates depends on input power frequency and the number of electrical magnetic poles.

What is IE1, IE2 and IE3 motors?

IE stand for International Electrotechnical, this is a international standard called by its full name International Electrotechnical Commission for rotating electrical machinery. It classifies three classes of standard: IE1 (standard), IE2 (high) and IE3 (premium). They specifies energy-efficency classes for single-speed, three-phase, and cage-induction motors with 2, 4 or 6 poles. For each class the efficiency is defined for a rated output range from 0.75 to 375 kW. In the European Community, the IE2 class is mandatory for all new motors since 16 June 2011. The IE3 class is mandatory since the first of January 2015 (7.5–375 kW) and 1 January 2017 (0.75–375 kW).

What is the difference between IE efficiency rating and EFF efficiency rating?

In 1998, the European Committee of Manufacturers of Electrical Machines and Power Electronics (CEMEP) developed three classes (i.e. EFF1, EFF2 and EFF3) to describe the energy efficiency of motors. It is a voluntary agreement between the electrical motor manufacturers and the European Commission. However, the contract expired on 16th June 2011. The EFF has 3 classes, i.e. EFF1, EFF2 and EFF3 respectively. EFF1 is the most energy efficient, while EFF3 is the least energy efficient.

In order to harmonize the standards describing motor energy efficiency, the International Electrotechnical Commission (IEC) has developed the International Efficiency (IE) classes through collaboration with the National Electrical Manufacturers Association (NEMA), CEMEP, the Japan Electrical Manufacturers’ Association (JEMA),the Institute of Electrical and Electronics Engineers (IEEE) and other international organizations. IEC 60034-30-1 defines the IE Classification. The latest version of IEC 60034-30-1 was published in June 2014.

#Basics #electricity #motors #Nema #Rating #Voltage

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