Ecodesign for power drive systems, motor starters, power electronics & their driven applications - Part 1: General requirements for setting energy efficiency standards for power driven equipment using the extended product approach (EPA), and semi analytic model (SAM)

This part of EN 50598 provides the general requirements to energy efficiency standardization for any extended product by using the guidance of the extended product approach (EPA).
It enables product committees for driven equipment with embedded motor systems (so called extended products) to interface with the relative power losses of the embedded motor system (e.g. PDS) in order to calculate the system energy efficiency for the whole application.
This shall be based on specified calculation models for speed/load profiles, the duty profiles and relative power losses of appropriate torque versus speed operating points.
This part of EN 50598 specifies the methodology of determination of losses of the extended product and its sub-parts.
This part of EN 50598 does not specify requirements for environmental impact declarations.

Ökodesign für Antriebssysteme, Motorstarter, Leistungselektronik und deren angetriebene Einrichtungen -- Teil 1: Allgemeine Anforderungen für die Erstellung von Normen zur Energieeffizienz von Ausrüstungen mit Elektroantrieb nach dem erweiterten Produktansatz (EPA) und semi-analytischen Modellen (SAM)

Dieser Teil von EN 50598 enthält eine allgemeine Vorgehensweise nach dem erweiterten Produktansatz EPA für die Normungsarbeit zum Thema Energieeffizienz für elektrisch angetriebene Teilanlagen. Produktkomitees, die sich damit befassen, erhalten die Möglichkeit, die relativen Verlustleistungen des eingebauten elektrischen Motorsystems (z. B. PDS) mit der davon angetriebenen Teilanlage jeder Art zu verknüpfen, um deren insgesamte System-Energieeffizienz zu bestimmen. Die Grundlage dafür sind festgelegte Berechnungsmodelle für Drehzahl/Last-Profile, die zeitlichen Belastungsprofile und relative Verlustleistungen des Antriebssystems in geeigneten Arbeitspunkten unter-schiedlicher Drehmomente in Abhängigkeit von der Drehzahl. Dieser Teil von EN 50598 legt die Methodik für die Bestimmung der Verluste des erweiterten Produktes und seiner Bestandteile fest. Dieser Teil von EN 50598 legt keine Anforderungen an Umweltverträglichkeitserklärungen fest.

Ecoconception des entraînements électriques de puissance, des démarreurs de moteur, de l'électronique de puissance et de leurs applications entraînées -- Partie 1: Exigences générales pour définir les normes d'efficacité énergétique d'un équipement entraîné via l'approche produit étendu (EPA) et par le modèle semi-analytique (SAM)

Cette partie de la norme pour l'écoconception fournit les exigences générales pour la normalisation de l'efficacité énergétique pour tout produit étendu à l'aide des lignes directrices de l'approche produit étendu (EPA).
Elle permet aux comités de produit pour l'équipement entraîné avec des systèmes moteurs intégrés (appelés produits étendus) d'entrer en interface avec les pertes d'alimentation relatives du système moteur intégré (par exemple, PDS) afin de calculer l'efficacité énergétique du système pour toute l'application.
Cela doit se baser sur les modèles de calcul spécifiés pour les profils de vitesse/charge, les profils de service et les pertes de puissance relatives des points d'exploitation du couple par rapport à la vitesse appropriée.
Cette partie de la norme spécifie la méthodologie pour déterminer les pertes du produit étendu et de ses sous-parties.
Cette partie de la norme ne spécifie pas les exigences pour les déclarations concernant l'effet sur l'environnement.

Okoljsko primerna zasnova motornih pogonskih sistemov, motornih zaganjalnikov, močnostne elektronike in njihove aplikacije, ki jih ti poganjajo - 1. del: Splošne zahteve za določitev standardov energijske učinkovitosti motorno gnane opreme z uporabo razširjenega proizvodnega pristopa (EPA) in polanalitičnega modela (SAM)

Ta del standarda EN 50598 določa splošne zahteve za standardizacijo energijske učinkovitosti za razširjene proizvode z uporabo smernic razširjenega proizvodnega pristopa (EPA).
Omogoča tehničnim odborom za opremo, gnano z vgrajenimi motornimi sistemi (ti. razširjeni proizvodi), povezavo z relativno izgubo energije vgrajenih motornih sistemov (npr. PDS) za izračun energijske učinkovitosti sistema za celotno aplikacijo.
Ta bo osnovan na določenih računskih modelih za hitrostne/nalagalne profile, dolžnostne profile in relativne izgube energije ustreznih navornih delovnih točkah napram hitrostnim delovnim točkam.
Ta del standarda EN 50598 navaja metodologijo za določanje izgub razširjenih proizvodov in njihovih poddelov.
Ta del ISO 50598 ne določa zahtev za deklaracije o okoljskih vplivih.

General Information

Status
Published
Public Enquiry End Date
31-Jan-2014
Publication Date
13-Aug-2015
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
11-Feb-2015
Due Date
18-Apr-2015
Completion Date
14-Aug-2015

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Ecodesign for power drive systems, motor starters, power electronics & their driven

applications - Part 1: General requirements for setting energy efficiency standards for

power driven equipment using the extended product approach (EPA), and semi analytic

model (SAM)
Ökodesign für Antriebssysteme, Motorstarter, Leistungselektronik und deren

angetriebene Einrichtungen -- Teil 1: Allgemeine Anforderungen für die Erstellung von

Normen zur Energieeffizienz von Ausrüstungen mit Elektroantrieb nach dem erweiterten

Produktansatz (EPA) und semi-analytischen Modellen (SAM)

Ecoconception des entraînements électriques de puissance, des démarreurs de moteur,

de l'électronique de puissance et de leurs applications entraînées -- Partie 1: Exigences

générales pour définir les normes d'efficacité énergétique d'un équipement entraîné via

l'approche produit étendu (EPA) et par le modèle semi-analytique (SAM)
Ta slovenski standard je istoveten z: EN 50598-1:2014
ICS:
13.020.99 Drugi standardi v zvezi z Other standards related to
varstvom okolja environmental protection
31.020 Elektronske komponente na Electronic components in
splošno general
SIST EN 50598-1:2015 en,fr

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 50598-1:2015
---------------------- Page: 2 ----------------------
SIST EN 50598-1:2015
EUROPEAN STANDARD EN 50598-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2014
ICS 29.160.30
English Version
Ecodesign for power drive systems, motor starters, power
electronics & their driven applications - Part 1: General
requirements for setting energy efficiency standards for power
driven equipment using the extended product approach (EPA),
and semi analytic model (SAM)

Ecoconception des entraînements électriques de Ökodesign für Antriebssysteme, Motorstarter,

puissance, des démarreurs de moteur, de l'électronique de Leistungselektronik und deren angetriebene Einrichtungen -

puissance et de leurs applications entraînées - Partie 1: Teil 1: Allgemeine Anforderungen zur Erstellung von

Exigences générales pour définir les normes d'efficacité Normen zur Energieeffizienz von Ausrüstungen mit

énergétique d'un équipement entraîné via l'approche Elektroantrieb nach dem erweiterten Produktansatz (EPA)

produit étendu (EPA) et par le modèle semi-analytique mit semi-analytischen Modellen (SAM)

(SAM)

This European Standard was approved by CENELEC on 2014-11-17. CENELEC members are bound to comply with the CEN/CENELEC

Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC

Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the

same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 50598-1:2014 E
---------------------- Page: 3 ----------------------
SIST EN 50598-1:2015
EN 50598-1:2014 (E)
Contents Page

Foreword...................................................................................................................................................3

1 Scope ................................................................................................................................................6

2 Normative references ........................................................................................................................6

3 Terms, definitions, symbols, units and abbreviated terms ................................................................6

4 Requirements for the development of energy efficiency standards for extended products ..............9

4.1 General ...................................................................................................................................9

4.2 Responsibility of the driven equipment technical committee ............................................... 10

4.3 Elements included in the extended product approach ......................................................... 10

5 Requirements for the semi analytical model (SAM) of the extended product ................................ 11

5.1 General ................................................................................................................................ 11

5.2 Torque/Power versus speed profiles ................................................................................... 12

5.3 Operating points over time ................................................................................................... 13

6 Requirements for the semi analytical model (SAM) of the motor system ...................................... 14

6.1 General ................................................................................................................................ 14

6.2 Speed versus torque loss points of a PDS and the associated power losses ..................... 15

6.3 Requirements if the motor system contains no CDM .......................................................... 15

7 Merging the semi analytical models (SAMs) to the extended product approach ........................... 16

7.1 General ................................................................................................................................ 16

7.2 Speed versus torque loss points of a motor system ............................................................ 17

7.3 How to determine intermediate speed versus torque loss points of a motor system .......... 17

7.3.1 General ................................................................................................................... 17

7.3.2 Determination of intermediate relative losses for speed versus torque

operating points of a motor system ........................................................................ 17

7.3.3 Loss determination by maximum losses of neighboured loss points ..................... 18

7.3.4 Loss determination by two-dimensional interpolation of losses of

neighboured loss points .......................................................................................... 18

Annex A (informative) Example how to apply the SAM in the EPA for pump systems with a

required speed versus torque loss points using the PDS .............................................................. 20

Annex B (informative) General calculation of the energy consumption based on the duty

profile .............................................................................................................................................. 22

Annex C (informative) Illustration of the collaboration of different responsibilities in the

extended product approach............................................................................................................ 23

Bibliography ........................................................................................................................................... 24

---------------------- Page: 4 ----------------------
SIST EN 50598-1:2015
EN 50598-1:2014 (E)
Foreword

This document (EN 50598-1:2014) has been prepared by CLC/TC 22X "Power electronics".

The following dates are fixed:
(dop) 2015-11-17
• latest date by which this document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2017-11-17
standards conflicting with this
document have to be withdrawn

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such

patent rights.

This document has been prepared under a mandate given to CENELEC by the European Commission

and the European Free Trade Association.

EN 50598, Ecodesign for power drive systems, motor starters, power electronics & their driven

applications, will consist of the following parts:

- Part 1: General requirements for setting energy efficiency standards for power driven equipment

using the extended product approach (EPA), and semi analytical model (SAM);

- Part 2: Energy efficiency indicators for power drive systems and motor starters;

- Part 3: Quantitative ecodesign approach through life cycle assessment including product category

rules and the content of environmental declarations.

The CLC/TC 22X/WG 06 is the enabled task force for dealing with the Mandate M/476 from European

Commission for the standardization in the field of variable speed drives and/or power drive system

products.

It has been set a close collaboration with several other technical committees (i.e. CLC/TC 2;

CLC/TC 17B) in order to provide a comprehensive standard for energy efficiency aspects and

ecodesign requirements together with a pilot stakeholder committee CEN/TC 197 from the customers

side.
Key points:

- Requirements on the content of semi analytical models for motor system driven equipment;

- Requirements how to use them in the extended product approach.

The content could be of interest for the following technical committees CLC/TC 59X, CLC/TC 111X,

CEN/TC 44, CEN/TC 113, CEN/TC 121, CEN/TC 123, CEN/TC 142, CEN/TC 143, CEN/TC 156,

CEN/TC 228, CEN/TC 232 and CEN/TC 299.

It is the intention of the working group that this document, once finalized as European standard series,

will be further processed to an international consensus in IEC and ISO.
---------------------- Page: 5 ----------------------
SIST EN 50598-1:2015
EN 50598-1:2014 (E)
Introduction
The Technical Committee CLC/TC 22X has circulated at 2010-03-31 the document

CLC/TC 22X/Sec0100/DC document including the mandate M/476 from European Commission for

standardization in the field of variable speed drives and/or power drive system products.

As the PDS contains converter driven motors, the requirements for measuring of the energy efficiency

of motors with non-sinusoidal supply is under the responsibility of CLC/TC2 covering the requirement

from Mandate M/470.

The document is based on the CENELEC technical board document referenced BT137/DG8058/INF

also reproducing this EC-mandate.

The CLC/TC 22X/WG 06 as being the standardization task force for dealing with this Mandate has

close collaboration with several other technical committees (i.e. CLC/TC 2; CLC/TC 17B).

Therefore CLC/TC 22X committee has been enabled responsible to clarify all relevant aspects in the

field of energy efficiency and ecodesign requirements for power electronics, switchgear, control gear,

and power drive systems and their industrial applications.

The sometimes controversial requirements are illustrated in Figure 1. The work has been agreed to

provide the reasonable target as a best compromise.
MMararkekett ssuurrvveeiillallabblele
((iinnddeeppeennddeenndd
TTechechnniicacallllyy
certifiable ))
ccoommpprreehheennssiivvee
RReasoeasonnababllee ttararggetet
MMananuuffacacttuurrerernneeuuttrraall
(N(Noo mmararkekettiinngg
mmessaessaggeses))

Figure 1 — Illustration of controversial requirements for the energy related product (ErP)

standardization

EN 50598 is developed under the CENELEC projects number 24602 to 24604 for compliance with

requirements from the horizontal mandate M/495.
Its three parts are together directly related to the mandates M/470 and M/476.

For the other mandates listed in Table 1, this standard could be applied if the future product standards

developed will make reference to it.
---------------------- Page: 6 ----------------------
SIST EN 50598-1:2015
EN 50598-1:2014 (E)

Table 1 — Mandates of the European Commission given to CEN, CENELEC and ETSI and how

they are contributed by these standard series parts
Mandates Part 1 Part 2 Part 3
M/470
 
Motors
M/476
 
PDS
M/495
  
Horizontal all
future
Applications
M/488
 
()
HVAC comfort
fans
M/498
 
()
Pumps
M/500
  ()
Compressors
---------------------- Page: 7 ----------------------
SIST EN 50598-1:2015
EN 50598-1:2014 (E)
1 Scope

This European Standard provides a general methodology to energy efficiency standardization for any

extended product including a motor system by using the methodological guidance of the extended

product approach (EPA).

It enables product committees for driven equipment with included motor systems to interact with the

relative power losses of the included motor system (e.g. PDS) in order to determine the system energy

efficiency aspects for the extended product by calculation.

This should be based on specified calculation models for speed/load profiles, the duty profiles and

relative power losses of appropriate torque versus speed operating points.

This part of the EN 50598 series specifies the methodology of determination of losses of the extended

product including a motor system and its sub-parts.
This framework is explained by an example for pumps.

This part of the standard does not specify requirements for environmental impact declarations.

2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated

references, the latest edition of the referenced document (including any amendments) applies.

EN 50598-2, Ecodesign for power drive systems, motor starters, power electronics & their driven

applications — Part 2: Energy efficiency indicators for power drive systems and motor starters

IEC 60050-161, International Electrotechnical Vocabulary. Chapter 161: Electromagnetic compatibility

3 Terms, definitions, symbols, units and abbreviated terms

For the purposes of this document, the terms and definitions given in IEC 60050-161 and the following

apply.
3.1
Energy Efficiency Index
EEI

value describing an energy efficiency aspect of an application, resulting from the extended product

approach (EPA)

Note 1 to entry: If the extended product is a pump system, the EEI is the ratio of the input power to the theoretical

reference power required for the application.
3.2
Extended Product

driven equipment together with its included motor system (e.g a PDS, a motor starter)

Note 1 to entry: See Figure 2.
---------------------- Page: 8 ----------------------
SIST EN 50598-1:2015
EN 50598-1:2014 (E)
extended product
motor system
power drive system (PDS)
driven equipment
complete drive module (CDM)
basic
mains &
trans- load
feeding
auxil- drive auxil-
motor
mains
mission Machine
section iaries module iaries
cabling
(BDM)
motor starter
contactor, softstarter,
etc.
motor control equipment = CDM or starter
Figure 2 — Illustration of the extended product including a motor system
3.3
Extended Product Approach
EPA

methodology to determine the energy efficiency index (EEI) of the extended product (EP) using the

speed torque profiles of the driven equipment, the relative power losses of the motor system and the

duty profile of the application
3.4
motor control equipment
either a CDM or a motor starter
3.5
motor system
motor control equipment and a motor
3.6
duty profile

fraction of time spent at each operating point during the total operating time or a complete cycle of

operation of the extended product
Note 1 to entry: Typically this profile is represented by an histogram.
Note 2 to entry: The standby mode can be included in the load time profile.
3.7
Electrical
power consumption [kW] of an application
3.8
Electrical Max
power consumption [kW] at 100 % speed and 100 % load
3.9
power consumption [kW] at operating point i
3.10
in,CDM
input power [kW] of the CDM from the power loss measurement
---------------------- Page: 9 ----------------------
SIST EN 50598-1:2015
EN 50598-1:2014 (E)
3.11
in,PDS
input power [kW] of the PDS from the power loss measurement
3.12

nominal Power [kW] of equipment which is typical for its population of the same rating

Note 1 to entry: See EN 60034-1 for motors.
3.13
out,CDM
output power [kW] of CDM from the power loss measurement
3.14
out,PDS
output power [kW] of PDS from the power loss measurement
3.15
rated power [kW] of equipment which is assigned by its manufacturer
3.16
Reference

power consumption [kW] used for reference, defined by the extended product committee

3.17

electrical power losses with the indices CDM dedicates it to the complete drive module, Mot dedicates

it to the motor, Aux dedicates it to the auxiliary devices like cables, transformers or filters

Note 1 to entry: The relative power losses are the per unit losses relative to the nominal power of the device.

3.18
L,CDM
power losses of a CDM
3.19
L,CDM, determined
power losses of CDM from the power loss determination method
3.20
L,CDM,relative
power losses of the CDM, referred to its rated apparent power
3.21
L,inverter
power losses in the inverter section of a CDM
3.22
L,PDS, determined
power losses of PDS from the power loss determination method
3.23
LT,Mot

total losses of a motor according to EN 60034-2-1, method 2-1-1B when supplied by a converter (non

sinusoidal power supply)
---------------------- Page: 10 ----------------------
SIST EN 50598-1:2015
EN 50598-1:2014 (E)
3.24
Semi Analytical Model
SAM

model for determining energy efficiency characteristics of a specific motor system or driven

equipment, based on mathematical equations and/or measured data
3.25
working time of an equipment
3.26
torque [Nm] at operating point i
3.27
timefraction

percentage of time when the extended product is operated at one specific operating point i

4 Requirements for the development of energy efficiency standards for
extended products
4.1 General

This document specifies a methodology to determine the energy efficiency index of an application,

based on the concept of semi analytical models (SAM). The methodology shall be referred to as the

extended product approach (EPA).

This document also specifies the responsibilities and tasks of the different stakeholders creating or

using these extended products standards, as well as the data flows in-between.
a) Specific information about the equipment shall be considered:

1) The torque versus speed profile of the driven equipment as specified by the manufacturer of

the driven equipment or the extended product technical committee.

2) The losses of the motor system or its constituents (Motor, CDM or starter) at reference part-

load operating points. These shall be provided by the different manufacturers as specified in

EN 50598-2.

3) The duty profile of the driven equipment. The extended product standards committee can for

example define typical applications of their extended products, each associated with a typical

duty profile

b) The extended product approach shall be used to determine an energy efficiency indicator (losses,

efficiency, energy consumption…):

1) EN 50598-2 specifies the methods for the determination of losses of the motor system using

measurement and/or calculations.

2) extended product standardization committees shall define how to combine the losses of the

motor system and the losses of the load to obtain an overall energy efficiency aspects related

indicator for the extended product within the defined application.

The interactions between the different stakeholders of the extended product approach are shown in

Figure C.1.
---------------------- Page: 11 ----------------------
SIST EN 50598-1:2015
EN 50598-1:2014 (E)
4.2 Responsibility of the driven equipment technical committee

Based on the general principles described in this standard it shall be the responsibility of the driven

equipment technical committee to standardize the methodology to calculate the EEI of the extended

product based on a semi analytical model of the driven equipment.
The product committee shall specify and standardize:

 one or more torque versus speed profiles (load profiles) as described in 5.2 considering typical

loads;

 one or more duty profiles as described in 5.3 considering the typical extended product service

conditions;

 an appropriate method for determining the losses at intermediate operating points based on the

data from the motor, CDM and PDS. See for example the methods in 7.3;

 a semi analytical model for the extended product considering the extended product approach

(EPA) as described in Clause 7, based on the eight torque versus speed operating points as

specified according to EN 50598-2 for the motor system;

 a method for determining an energy efficiency indicator for the extended product under their

responsibility; see Annex B for example.

NOTE The motor system data might consist of PDS data as well as individual data for CDM and motor. EN 50598-2 provides

information about the determination of PDS data based on individual motor and CDM data.

4.3 Elements included in the extended product approach

The semi analytical model (SAM) model of the driven equipment developed by the technical

committee responsible for the extended product combines the information given by the CDM/PDS

manufacturer according to EN 50598-2 in the operating points for the motor system. Other operating

points can be calculated if needed according to 7.3.

To determine the overall losses or efficiency of an extended product implemented in an application it is

required to go through several steps:
Several elements shall be combined:

a) The SAM of the Motor System, specified in EN 50598-2, giving its relative losses at several

standardized operating points. The motor system can be a power drive system (PDS) or can

consist of a motor and a motor starter (contactor, softstarter…):

1) When the motor system is a PDS, the calculation of the losses is the sum of the losses of the

CDM and motor or the total losses of the complete PDS.

2) When the motor system is based on a motor starter, the calculation of the losses is simpler;

there is no need to use any reference motor starter.

b) The SAM of the driven equipment (pump, compressor, fan…), giving the losses or efficiency of

the load machine at typical operating points. It is the responsibility of the associated product

committee.

c) The extended product approach, combining the SAM of the motor system and the SAM of the

driven equipment (and also if necessary relative losses for the coupling). It is the responsibility of

the manufacturer of the extended product. The extended product approach uses application-

related data (required operating points, duty profile, working time …), in order to determine the

energy efficiency index of the application. This index allows comparing the energy efficiency

aspects of several motor systems for a given application, or several modes of operation of a given

extended product.
---------------------- Page: 12 ----------------------
SIST EN 50598-1:2015
EN 50598-1:2014 (E)

Table 2 — Illustration how to combine essential elements of the efficiency contributions

Elements Input Output Reference Responsibility
required for the
extended
product
approach
SAM of the Characteristics of relative losses of the EN 50598-2 motor system
Motor System the motor system motor system at product committee
(physical standardized
components, rated operating points
powers…)
SAM of the
output of the SAM relative losses of the EP standard load machine
extended of the motor system EP at standardized associated product
product (EP) and characteristics operating points committee (e.g.
of the driven CEN TC 197)
equipment (load
machine)
extended output of the SAM energy efficiency EP standard extended product
product of the EP, and index of extended associated product
approach requirements about product for the committee (e.g.
the application (duty application CEN/TC 197)
profiles, operating
time, etc. and
tolerances
5 Requirements for the semi analytical model (SAM) of the extended product
5.1 General

The SAMs for the subparts of the extended product are necessary in order to determine the overall

power losses of the extended product.

The following chapter describes the basic requirements which shall be fulfilled while specifying the

SAM of the extended product.
The EPA of the extended product shall include the following aspects:

 typical torque versus speed profile (operating profile) of the driven equipment

 the embedded relative losses of the motor system according to the data determined according to

EN 50598-2.

The outcome of the SAM shall be used to calculate the energy efficiency index (EEI) which shall be

able to quantitatively distinguish between typical solutions for an application for which the extended

product is efficient and those for which the extended product is inefficient..

The EEI value shall be given in a metric scheme which allows displaying the value in the user's

documentation or the catalogue.

The tolerances of the EEI shall be specified by the standardization committee of the extended product.

To judge a system regarding energy efficiency aspects all components of the system shall be taken

into account. Speed regulation by using a power drive system (PDS) is advantageous in some cases,

but on the other hand it also creates additional losses.

The energy savings that can be achieved are very often depending on the operating point OP at which

the extended product is operated as required by the application.
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SIST EN 50598-1:2015
EN 50598-1:2014 (E)

Therefore the information about the application and its duty shall be provided by technical committees

determining the SAM for the application specific extended product.

Two application-related characteristics are particularly useful for describing the extended product and

the way it is operated:

a) The torque or power versus speed profile. This curve describes how the torque required by the

driven equipment depends on its speed. It essentially depends on the type of driven equipment.

b) The duty profile. This graph describes the various power levels required by the driven

equipment, including standby, and the fraction of time during which the equipment is operated at

these levels. The duty profile essentially influences the sizing of the motor system and on how the

extended product is operated in practice.

These two characteristics can be used as input data to derive the right motor control equipment of the

extended product in terms of energy efficiency performance.
5.2 Torque/Power versus speed profiles

The torque or power versus speed profile describes how the torque T or power P required by the

driven load varies with its speed n. The power is also the product of torque and speed.

Most of the existing driven equipments can be categorized into one of the basic torque and power vs

speed profiles shown in Figure 3.

Figure 3 — Typical torque/power vs. speed profiles for different extended products

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SIST EN 50598-1:2015
EN 50598-1:2014 (E)
5.3 Operating points over time

The desired behavior of the extended product, as well as the characteristics of the motor, defines one

or several operating points at which the motor will have to be operated.

Depending on the process demands the motor may not be running at rated output power all the time.

Part load in the sense of this standard is a situation where the application requires reduced torque

and/or speed compared to the rated values.

The efficiency of an extended product strongly depends on the load level. Furthermore, stand-by (SB)

losses of soft starters and CDMs shall be taken into account. They are present in periods where the

power part is disabled but the control is still supplied. Stand by losses are losses generated by e.g. the

power supply of the control part.

Therefore, to estimate the efficiency of an extended product and compare several potential control

solutions, it is essential to know which levels of mechanical and electrical power are needed by the

extended product and in which time fraction. This is the purpose of the operating points ov

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