Iec system of conformity assessment schemes for electrotechnical equipment and components iecee. Note 4 the values tabled for locked rotor apparent power are based on r. The iec publishes international standards, technical guides and reports which are the bases or, in any case, a reference of utmost importance for any national and european standardization activity. Standard for acceptance testing specifications for. Pdf standards for efficiency of electric motors researchgate. Current global motor energy efficiency standards published all iec international electrotechnical commission standards can be purchased at. Nema and iec schematic diagram comparisons mz081001en. We would like to show you a description here but the site wont allow us.
Compared with the old iec standard from 2008, which defined three efficiency values for threephase asynchronous motors, the updated standard iec 60034301 has the additional efficiency class ie4. Energy efficiency classes for iec motors menzel elektromotoren. Iec standards describe the state of the art iec standards are applied in about twothirds of countries worldwide. This specification defines the minimum requirements for the design, materials, fabrication, assembly, inspection, test, paint, preparation for shipment, and supply of an iec motor control center.
Though, they both must meet strict design and performance standards with unique requirements targeted at certain industries, regions and markets. The standard degree of mechanical protection for motors. Low voltage motors basics of iec motors esr motor systems. Low voltage iec motor control centers procurement specifications. Note 3 it should be noted that values given in manufacturers catalogues may include tolerances in accordance with iec 600341. Standard format for iec standards electric motor systems. Iec low voltage motors guide electrical engineering portal. For example, iec standardizes the frame size of motors. Even though iec contactors are designed and tested to the iec standard, they must also be tested according to ul standards if they are to be used as a ul approved device. Testing for such conditions is described in iec ts 600341841 1 which indicates that the manufacturer must prove the motor will not have pd for the expected life of the motor and sets pd inception voltage limits, based on severity of the surge environment. Understanding motor nameplate information nema vs iec.
The iec standard for ac motors learning electrical engineering. However, in 2008 these eff standards changed to the current iec standards for electric motors to overcome the international inconsistencies in regulations between electric motor standards and efficiency classes. The designation iec means that the motors conform to standards developed by the international electrotechnical commission. Theyre likely to be iec clones or close derivatives. In 1991 the iec has ratified cooperation agreements with cenelec european. Although they adhere to different standards, both methods are intended to determine the performance of the motor. Harmonics measurement and evaluation methods for both standards are governed by iec 647. In north america, the national electric manufacturers association nema sets motor standards. As per standard iec 600341, for induction motors, the combinations of voltage and frequency variations are classified as zone a or zone b figure 3. The new standard iec 60034301 was published in march 2014, replacing its predecessor iec 6003430 from 2008. Iec standards the motor standards can be grouped into two major categories. In north america, the national electric manufacturers association nema sets motor standards, including what should go on the nameplate nema standard mg 110. Motor guide february 2014 low voltage motors motor guide.
If you are involved with working with motors, this table is very important and could be used as a reference as to what area of ac motors the various units of the standard covers. Ihs markit is your source for iec standards and publications. Designers and builders of control panels who apply the relevant iec standards and document the fact can be confident they are satisfying market requirements in most countries. Their performances are also in accordance with most national standards specifically vde 0530, nbn c 51101, nf c 51111. The table below gives an overview of standards in relation to design, production and use of electric motors. Harmonised standards currently there are about 30 standards issued by cenelec for electrical equipment originally en 50014 series now mainly en 60079 series most are identical to related iec 60079 some en only standards remain where iec has not yet published an equivalent, e. Iec defines international energyefficiency classes ie codes in iec standard 6003430 iec motor nameplate efficiency is the rated efficiency assigned by the manufacturer for a particular ie code, the rated efficiency must not be less than the value given in 6003430 for that rating for iec motors, the rated efficiency and ie code. Use of iec contactors in ul, csa and nec regulated applications. Iec standards are generally issued in two languages. Electrical installation handbook protection, control and. Iec, the international electrotechnical commission, is a nonprofit organization that develops and publishes standards concerning electrical technologies, of which a truly wide variety exists in todays modern world.
Many iec standards have been some what nationalized. The international electrotechnical commission iec is charged with international standards for electric rotating machines, i. A standard that provides conformity with corresponding. For example, the us established the nema standards for electric motors, which differed a lot from the eu standards. The iec site includes information about electric, electronic and electrotechnical international standards, compliance and conformity assessment for electronics and electronic equipment, and international electrical standards information. Founded in 1906, the iec international electrotechnical commission is the worlds leading organization for the preparation and publication of international standards for all electrical, electronic and related technologies.
As part of electrical safety, this standard defines the. Standard for acceptance testing specifications for electrical. The numbers of older iec standards were converted in 1997 by adding 60000. The international electrotechnical commission iec has introduced standards relating to energy efficient motors.
This is an incomplete list of standards published by the international electrotechnical commission iec. Iec standards for electric motors magnetic innovations. Overall, nema and iec motors may be twins, but not identical twins. In addition, 60hz operation enables higher power density and. Section 7 of the ansineta standard for acceptance testing specifications for electrical power equipment and systems may be reproduced and used on a cut and paste basis for the particular type of equipment to be tested. A published iec standard can be purchased in hardcopy and pdf from. Adoption of iec standards by any country or manufacturer is entirely voluntary. The same can be said with minor exceptions for standards worldwide. The international electrotechnical commission iec 6180051 is a safety standard for adjustablespeed electrical power drive systems. Centerline 2500 motor control centers rockwell automation 2500sr002cenp xx xx xx 3 part 1 general 1. B5 flange d flange b3 foot mounted motor the flange is bigger than the motor frame. Ts, th, tp, d and s series electric motors can be manufactured in conformity with the following standards. Ac3 and ac4 are the categories of most interest for general motor starting applications.
Whether it is a complex control system on a machine tool or a simple acrosstheline motor starter, the need to recognize and understand these symbols becomes more important. Guide to iec 6180092determining loss of power drive systems pdss in extended products. The following sections of the ansineta standard for acceptance testing specifications for. Reference guide low voltage motors basics of iec motors. Guide to preparing a design proposal for paralleling customer generation with an electric utility. For example, germany has its vde 0530 standard, great britain has its bs 26 standard and france has nf cs1100.
Utilization categories are used with iec devices to define the typical duty cycle of an iec device. Understanding motor nameplate information nema vs iec standards course content the motor standards can be grouped into two major categories. Iec 6003421 specifies rules concerning efficiency testing methods and iec 6003430 defines efficiency classes for a wide range of electric motors connected direct on line. Quality standards the rating and performance of bf series tefc motors meet the standards laid down in iec 341 1983. The international electrotechnical commission is the international standards and conformity assessment body for all fields of electrotechnology. The reference values provided in this guide apply specifically to abbs process performance motor range.
Standard format for iec standards learning from motor. Nema frames sizes are larger than the iec frame sizes, allowing the use of more active materials. The standard aims to consolidate ac and traction voltages within the industry and defines the following bands. Iec quick reference chart iec foot mounting shaft b5 flange b14 face general frametype abchdela mnpstmnpstlacadhcxx 102 121 63 300 100 80 40 63 11 23 8 115 95 140 9375 60 90 m5 2. List of international electrotechnical commission standards.
Representatives from some 45 national iec committees ncs, including 15 countries with observer status, work together on the development of motor standards in the technical committee 2 tc2. Information guide for general purpose industrial ac small and medium squirrelcage induction motor standards. The intent of the iec standard is to specify test methods that assure a given stator insulation design can prevent formation of pd in new windings and continue to suppress pd throughout the life of the motor type i insulation. Many iec standards have been somewhat nationalized. High efficiency motors have usually higher speed ratings than comparable sized standard. Iec standards and eu directives control panel siemens. This publication serves as a primer on the most common iec designations and how they relate to nema standards. For motor applications, conformance to ul standard 508 andor csa c22. If required, the performances of bf motors may be changed and.