Energy performance of lifts, escalators and moving walks - Part 2: Energy calculation and classification for lifts (elevators) (ISO 25745-2:2015, Corrected version 2015-12-15)

ISO 25745-2:2015 specifies a method to estimate energy consumption based on measured values, calculation, or simulation, on an annual basis for traction, hydraulic and positive drive lifts on a single unit basis, and an energy classification system for new, existing, and modernized traction, hydraulic, and positive drive lifts on a single unit basis.
It applies to passenger and goods passenger lifts with rated speeds greater than 0,15 m/s and only considers the energy performance during the operational portion of the life cycle of the lifts. For other types of lifts (e.g. service lifts, lifting platforms, etc.), it can be taken as a reference.
It does not cover energy aspects, which affect the measurements, calculations, and simulations, such as the following: hoistway lighting; heating and cooling equipment in the lift car; machine room lighting; machine room heating, ventilation, and air conditioning; non-lift display systems, CCTV security cameras, etc.; non-lift monitoring systems (e.g. building management systems, etc.); effect of lift group dispatching on energy consumption; environmental conditions; consumption through the power sockets; lifts whose travel includes an express zone (an express zone is unlikely to affect the average car load but can significantly affect the average travel distance).

Energieeffizienz von Aufzügen, Fahrtreppen und Fahrsteigen - Teil 2: Energieberechnung und Klassifizierung von Aufzügen (ISO 25745-2:2015)

Diese Norm legt Folgendes fest:
a)   ein Verfahren zur Schätzung des Energieverbrauchs auf der Grundlage von gemessenen Werten, Berechnung oder Simulation; auf jährlicher Basis bei Seil- und Hydraulikaufzügen und auf Basis einer Einzelanlage;
b)   Systeme zur Klassifizierung von neuen, bestehenden und modernisierten Seil- und Hydraulikaufzügen auf Basis einer Einzelanlage;
c)   Richtlinien zur Reduzierung des Energieverbrauchs von bestehenden Aufzügen, die beim Bau von Systemen zur Energieklassifizierung und zur Einstufung nach Umweltschutzerwägungen verwendet werden können.
Diese Norm behandelt nur die Energieeffizienz während der Betriebsphase innerhalb des Lebenszyklus von Seil- und Hydraulikaufzügen.
Diese Norm behandelt keine Energieaspekte, welche die Messungen, Berechnungen und Simulationen beeinflussen, wie z. B.:
   Beleuchtung des Schachts;
   Einrichtungen für die Heizung und Kühlung im Fahrkorb;
   Beleuchtung des Triebwerksraums;
   Heizung, Lüftung und Klimatisierung des Triebwerksraums;
   nicht-aufzugsrelevante Anzeigesysteme, Videoüberwachungskameras usw.;
   nicht-aufzugsrelevante Überwachungssysteme (z. B. Gebäudemanagementsysteme usw.);
   Harmonische der Eingangsleistung (Harmonische werden in den Normen über elektromagnetische Kompatibilität behandelt);
   Auswirkungen einer Gruppensteuerung auf den Energieverbrauch;
   Umgebungsbedingungen;
   Energieverbrauch über Steckdosen;
   Aufzüge, deren Weg eine Expresszone einschließt.

Performance énergétique des ascenseurs, escaliers mécaniques et trottoirs roulants - Partie 2: Calcul énergétique et classification des ascenseurs (ISO 25745-2:2015, Version corrigée 2015-12-15)

l'ISO 25745-2:2015 spécifie une méthode permettant d'estimer la consommation énergétique d'ascenseurs à adhérence, hydrauliques ou à treuil attelé sur la base d'appareils individuels, à partir de valeurs mesurées, de calculs ou de simulations sur une base annuelle, et un système de classification énergétique pour les ascenseurs à adhérence, hydrauliques ou à treuil attelé neufs, existants et modernisés sur la base d'appareils individuels.
Elle s'applique aux ascenseurs et aux ascenseurs de charge ayant des vitesses nominales supérieures à 0,15 m/s et ne prend en considération que la performance énergétique pendant la période opérationnelle du cycle de vie des ascenseurs. Pour les autres types d'ascenseurs (par exemple monte-charge, plates-formes élévatrices, etc.), elle peut servir de référence.
Elle ne traite pas des aspects énergétiques qui affectent les mesurages, les calculs et les simulations, tels que: l'éclairage de la gaine d'ascenseur; les équipements de chauffage et de refroidissement installés dans la cabine d'ascenseur; l'éclairage du local de machines; les dispositifs de chauffage, de ventilation et de conditionnement d'air du local de machines; les systèmes d'affichage, les caméras de vidéosurveillance, etc. qui ne concernent pas l'ascenseur; les systèmes de surveillance qui ne concernent pas l'ascenseur (par exemple, les systèmes de gestion technique du bâtiment, etc.); l'incidence sur la consommation énergétique du mode de distribution des cabines d'un groupe d'ascenseurs; les conditions environnementales; la consommation par le biais des prises de courant; les ascenseurs qui parcourent une zone sans arrêt intermédiaire (il est peu probable qu'une zone sans arrêt intermédiaire ait une incidence sur la charge moyenne de la cabine, mais elle peut avoir une incidence significative sur la distance parcourue moyenne).

Energetska učinkovitost dvigal (liftov), tekočih stopnic in tekočih stez - 2. del: Energetski izračun in razvrstitev liftov (ISO 25745-2:2015, popravljena različica 2015-12-15)

General Information

Status
Published
Publication Date
07-Apr-2015
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
08-Apr-2015
Completion Date
08-Apr-2015

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SLOVENSKI STANDARD
SIST EN ISO 25745-2:2015
01-junij-2015

Energetska učinkovitost dvigal (liftov), tekočih stopnic in tekočih stez - 2. del:

Energetski izračun in razvrstitev liftov (ISO 25745-2:2015, popravljena različica

2015-12-15)

Energy performance of lifts, escalators and moving walks - Part 2: Energy calculation

and classification for lifts (elevators) (ISO 25745-2:2015, Corrected version 2015-12-15)

Energieeffizienz von Aufzügen, Fahrtreppen und Fahrsteigen - Teil 2:

Energieberechnung und Klassifizierung von Aufzügen (ISO 25745-2:2015, korrigierte

Fassung 2015-12-15))

Performance énergétique des ascenseurs, escaliers mécaniques et trottoirs roulants -

Partie 2: Calcul énergétique et classification des ascenseurs (ISO 25745-2:2015,
Version corrigée 2015-12-15)
Ta slovenski standard je istoveten z: EN ISO 25745-2:2015
ICS:
91.140.90 Dvigala. Tekoče stopnice Lifts. Escalators
SIST EN ISO 25745-2:2015 en,de

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

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SIST EN ISO 25745-2:2015
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SIST EN ISO 25745-2:2015
EN ISO 25745-2
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2015
EUROPÄISCHE NORM
ICS 91.140.90
English Version
Energy performance of lifts, escalators and moving walks -
Part 2: Energy calculation and classification for lifts
(elevators) (ISO 25745-2:2015, Corrected version 2015-
12-15)

Performance énergétique des ascenseurs, escaliers Energieeffizienz von Aufzügen, Fahrtreppen und

mécaniques et trottoirs roulants - Partie 2: Calcul Fahrsteigen - Teil 2: Energieberechnung und

énergétique et classification des ascenseurs (ISO Klassifizierung von Aufzügen (ISO 25745-2:2015)

25745-2:2015, Version corrigée 2015-12-15)
This European Standard was approved by CEN on 22 November 2014.

CEN 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 CEN

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 CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

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

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 25745-2:2015 E

worldwide for CEN national Members.
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SIST EN ISO 25745-2:2015
EN ISO 25745-2:2015 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

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SIST EN ISO 25745-2:2015
EN ISO 25745-2:2015 (E)
European foreword

This document (EN ISO 25745-2:2015) has been prepared by Technical Committee ISO/TC 178 “Lifts,

escalators and moving walks” in collaboration with Technical Committee CEN/TC 10 “Lifts, escalators

and moving walks” the secretariat of which is held by AFNOR.

This European Standard shall be given the status of a national standard, either by publication of an

identical text or by endorsement, at the latest by October 2015, and conflicting national standards shall

be withdrawn at the latest by October 2015.

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

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

rights.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,

France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,

Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
Endorsement notice

The text of ISO 25745-2:2015, Corrected version 2015-12-15 has been approved by CEN as

EN ISO 25745-2:2015 without any modification.
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SIST EN ISO 25745-2:2015
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SIST EN ISO 25745-2:2015
INTERNATIONAL ISO
STANDARD 25745-2
First edition
2015-04-01
Corrected version
2015-12-15
Energy performance of lifts, escalators
and moving walks —
Part 2:
Energy calculation and classification
for lifts (elevators)
Performance énergétique des ascenseurs, escaliers mécaniques et
trottoirs roulants —
Partie 2: Calcul énergétique et classification des ascenseurs
Reference number
ISO 25745-2:2015(E)
ISO 2015
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SIST EN ISO 25745-2:2015
ISO 25745-2:2015(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2015, Published in Switzerland

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form

or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior

written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of

the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2015 – All rights reserved
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SIST EN ISO 25745-2:2015
ISO 25745-2:2015(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 2

4 Data collection and analysis tools ...................................................................................................................................................... 2

5 Calculation of energy consumption .................................................................................................................................................. 3

5.1 Methodology ............................................................................................................................................................................................. 3

5.2 Calculation of running energy per day ............................................................................................................................... 3

5.2.1 Usage and number of starts per day ............................................................................................................... 3

5.2.2 Average travel distance .............................................................................................................................................. 4

5.2.3 Average running energy per metre .................................................................................................................. 4

5.2.4 Start/stop energy consumption ......................................................................................................................... 4

5.2.5 Running energy of an average cycle with empty car ........................................................................ 5

5.2.6 Daily running energy .................................................................................................................................................... 5

5.3 Calculation of non-running (idle/standby) energy consumption per day .......................................... 6

5.3.1 Running time per day .................................................................................................................................................. 6

5.3.2 Non-running time per day ....................................................................................................................................... 7

5.3.3 Time ratios of idle/standby modes .................................................................................................................. 7

5.3.4 Daily non-running (idle/standby) energy consumption ............................................................... 8

5.4 Total energy consumption per day ........................................................................................................................................ 8

5.5 Total energy consumption per year ...................................................................................................................................... 8

5.6 Method for determining the daily energy consumption for energy storage systems ................ 8

6 Lift energy efficiency classification ................................................................................................................................................... 9

6.1 Rationale....................................................................................................................................................................................................... 9

6.2 Performance level for running .................................................................................................................................................. 9

6.3 Performance levels for idle/standby.................................................................................................................................10

6.4 Classification of energy performance of the lift ......................................................................................................10

7 Specific running energy for the reference cycle ...............................................................................................................11

8 Reporting ...................................................................................................................................................................................................................11

Annex A (informative) Specific usage category ......................................................................................................................................13

Annex B (informative) Example calculation ..............................................................................................................................................14

Annex C (informative) Symbols ...............................................................................................................................................................................16

Bibliography .............................................................................................................................................................................................................................18

© ISO 2015 – All rights reserved iii
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SIST EN ISO 25745-2:2015
ISO 25745-2:2015(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).

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

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www.iso.org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the meaning of ISO specific terms and expressions related to conformity

assessment, as well as information about ISO’s adherence to the WTO principles in the Technical

Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information

The committee responsible for this document is ISO/TC 178, Lifts, escalators and moving walks.

This corrected version of ISO 25745-2:2015 incorporates the following corrections: minus signs have

been replaced by plus signs in Formulae (9), (10) and (11); references in the Bibliography have been

updated and corrected.

ISO 25745 consists of the following parts, under the general title Energy performance of lifts, escalators

and moving walks:
— Part 1: Energy measurement and verification
— Part 2: Energy calculation and classification for lifts (elevators)
— Part 3: Energy calculation and classification for escalators and moving walks
iv © ISO 2015 – All rights reserved
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SIST EN ISO 25745-2:2015
ISO 25745-2:2015(E)
Introduction

This International Standard has been prepared in response to the rapidly increasing need to ensure

and to support the efficient and effective use of energy. This International Standard provides

a) a method to estimate energy consumption on a daily and an annual basis for lifts, and

b) a method for energy classification of new, existing, or modernised lifts.

This International Standard is intended to be a reference for the following parties:

— building developers/owners to evaluate the energy consumption of various lifts;

— building owners and service companies when modernising installations including reduction of

energy consumption
— the installers and maintenance providers of lifts;
— consultants and architects involved in specification of lifts.
— inspectors and other third parties providing energy classification services.

The total energy consumption over the entire life cycle of lifts consists of the energy to manufacture,

install, operate, and the disposal of lifts. However, for the purpose of this International Standard, only

operating energy (running, idle, and standby) performance is considered.

In the preparation of this International Standard, Technical Committee ISO/TC 178, Subcommittee WG10

has initiated extensive research, which included over 4 500 simulations of typical lift installations. The

results of this research have been used to provide the numerical values shown in Tables 2 to 4.

This International Standard only considers traction, hydraulic and positive drive lifts, but can be used

as a reference for alternative technologies.

This International Standard can be used in relationship with national/regional jurisdictional energy

performance purposes.

It is assumed that whenever the energy performance of a lift is assessed to this International Standard,

all components of the lift have been designed in accordance with usual engineering practice and

calculation codes, are of sound mechanical and electrical construction, are made of materials with

adequate strength and of suitable quality, are free of defects, are kept in good repair and working order,

and have been selected and installed so that foreseeable environmental influences and special working

conditions have been considered.
© ISO 2015 – All rights reserved v
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SIST EN ISO 25745-2:2015
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SIST EN ISO 25745-2:2015
INTERNATIONAL STANDARD ISO 25745-2:2015(E)
Energy performance of lifts, escalators and moving walks —
Part 2:
Energy calculation and classification for lifts (elevators)
1 Scope
This part of ISO 25745 specifies the following:

a) a method to estimate energy consumption based on measured values, calculation, or simulation, on

an annual basis for traction, hydraulic, and positive drive lifts on a single unit basis;

b) energy classification system for new, existing, and modernized traction, hydraulic, and positive

drive lifts on a single unit basis;

This part of ISO 25745 applies to passenger and goods passenger lifts with rated speeds greater than

0,15 m/s and only considers the energy performance during the operational portion of the life cycle

of the lifts.

NOTE 1 For other types of lifts (e.g. service lifts, lifting platforms, etc.), this part of ISO 25745 can be taken

as a reference.

This part of ISO 25745 does not cover energy aspects, which affect the measurements, calculations, and

simulations, such as the following:
a) hoistway lighting;
b) heating and cooling equipment in the lift car;
c) machine room lighting;
d) machine room heating, ventilation, and air conditioning;
e) non-lift display systems, CCTV security cameras, etc.;
f) non-lift monitoring systems (e.g. building management systems, etc.);
g) effect of lift group dispatching on energy consumption;
h) environmental conditions;
i) consumption through the power sockets;
j) lifts whose travel includes an express zone.

NOTE 2 An express zone is unlikely to affect the average car load but can significantly affect the average

travel distance.
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.

ISO 25745-1, Energy performance of lifts, escalators and moving walks — Part 1: Energy measurement

and verification
© ISO 2015 – All rights reserved 1
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SIST EN ISO 25745-2:2015
ISO 25745-2:2015(E)
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 25745-1 and the following apply.

NOTE For symbols, see Annex C.
3.1
average cycle

cycle of one up and one down trip each covering the average travel distance of the target installation

including two complete door cycles
3.2
express zone

section of the lift well where there are no landing entrances whose length is more than three average

floor heights
3.3
load factor

ratio between the running energy used by a car carrying an average load and the running energy

with an empty car
Note 1 to entry: The average load that a car carries is given in Table 3.
3.4
short cycle

cycle during which the empty car is run for a travel distance of at least one-quarter of the total travel

height with the travel distance centred around the mid-point of the travel height and back to the

starting point over a sufficient distance for the lift car to reach stable rated speed in both directions

including two complete door cycles
3.5
trip(s)

movement(s) from a starting (departure) landing to the next stopping (arrival) landing not

including re-levelling
4 Data collection and analysis tools

The energy values (running energy, idle, 5 min standby, and 30 min standby power) used to estimate

annual energy consumption can be obtained using the energy measurement methodologies as specified

in ISO 25745-1 or by calculation or simulation.

Energy measurements can be taken during commissioning of a new lift or during the life of an existing

lift or on a test facility.
Running energy measurements can be achieved by

a) running the empty lift car between one terminal landing and the other terminal landing and then

back to the first terminal landing, including the energy used during the two door operations, in

accordance with the reference cycle as specified in ISO 25745-1, and

b) running the empty lift car from a defined landing to a predetermined point in the lift well and then

back to the defined landing (short cycle), including the energy used during the two door operations,

in accordance to the measurement procedures specified in ISO 25745-1.
Each cycle comprises two trips.

The running energy of the short cycle shall be determined with the travel centred on the mid-point

between the defined landing and the predetermined point, in order to reduce inaccuracies due the

influence of suspension means, travelling cables, etc. The travel of the short cycle shall be at least 1/4 of

the total travel height. However, the lift shall always reach rated speed during the cycle. For lifts with

two stops, no short running cycle evaluation is needed because the lift always runs the full travel height.

2 © ISO 2015 – All rights reserved
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SIST EN ISO 25745-2:2015
ISO 25745-2:2015(E)

Measurement b) allows a test facility to be arranged to match the terminal to terminal travel distance

of a target installation with a specified rated speed.

The determination of the 30 min standby power is only necessary if any lift energy consuming

components switch to a lower energy level after a time exceeding 5 min.

The standby power values shall be determined taking into account the manufacturer’s powering down

sequence times of the energy consuming components when the lift is in operation. The transition times

from standby modes shall be indicated in the documentation of the installation.

NOTE Some manufacturers can have a number of standby states depending on their powering down

sequence and recovery times.
5 Calculation of energy consumption
5.1 Methodology

This subclause specifies a methodology for the calculation of annual energy consumption.

This calculation methodology can be applied to new lifts and existing lifts and can only be applied to

single units. It can also be used to re-assess an installation after modernization.

This method applies whether the values are measured or are provided from a manufacturer’s model data.

In the case of groups of lift installations, each unit shall be considered as an individual unit. The energy

used by a shared component in a group shall be equally distributed between the individual units.

The following sections indicate the calculation process. An example calculation is shown in Annex B.

The methodology shown in 5.2 to 5.5 applies to lifts, which draw all power for normal running and non-

running operation, directly from the mains supply. For systems, which draw all or partial power from

energy storage systems during normal running or non-running operation, the method for calculating

the daily energy consumption is outlined in 5.6. Counterweights which store the energy of one lift run

are not considered as an energy storage system.

NOTE There might be a deviation between a calculated value and a measured value for a target

installation. This can be due to assumptions made. Where the difference is greater than 20 %, an investigation

should be carried out.
5.2 Calculation of running energy per day
5.2.1 Usage and number of starts per day

The usage of an individual lift shall be categorized according to Table 1 by the estimated number of trips

per day. The approximate number of trips per day can be obtained from observations or a trip counter.

Where this data is not available, it can be estimated for the specific usage category according to Annex A.

Table 1 — Categorized number of trips per day
Usage category 1 2 3 4 5 6
Usage intensity/ Very low Low Medium High Very high Extremely
frequency high
Number of trips 50 125 300 750 1 500 2 500
per day (n )
(<75) (75 to <200) (200 to <500) (500 to <1 000) (1 000 to <2 000) (≥2 000)
(typical range)

NOTE The number of trips is categorized in order to achieve comparable results for energy assessments

carried out by different parties.
© ISO 2015 – All rights reserved 3
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SIST EN ISO 25745-2:2015
ISO 25745-2:2015(E)

For lift applications in which the traffic pattern and the number of starts per day are well known, e.g.

in existing buildings, a specific number of starts per day deviating from Table 1 can be agreed between

involved parties for the assessment of the annual energy consumption and classification of the lift. In

this case, the selected number of starts has to be documented as required in Clause 8.

5.2.2 Average travel distance

The average travel distance (s ) for the target installation shall be selected from Table 2 as percentage

of the one-way travel distance of the reference cycle according to ISO 25745-1.
Table 2 — Percentage of average travel distance
Usage category 1–3 4 5 6
Number of stopping floors Percentage average travel distance
2 100 %
3 67 %
> 3 49 % 44 % 39 % 32 %

NOTE For lift applications in which the traffic patterns are well known, a specific percentage of the average

travel distance can be agreed between the involved parties for the assessment of the annual energy consumption.

In this case, the selected percentage should be documented in Annex B.
5.2.3 Average running energy per metre

The average running energy consumption per metre of travel shall be determined when the lift is

running at rated speed.

The average running energy consumption per metre of travel is determined by Formula (1):

 
1 EE−
rc sc
E = (1)
 
2 ss−
 rc sc 
where

E is the running energy consumption of reference cycle according to ISO 25745-1 (Wh);

E is the running energy consumption of the short cycle (Wh);

s is the one-way travel distance of reference cycle according to ISO 25745-1 (m);

s is the one-way travel distance of the short cycle (m).

NOTE s and s are the one-way travel distances in each direction and need to be counted twice for the

rc sc
running distance of the complete cycle.
5.2.4 Start/stop energy consumption

The start/stop energy consumption includes the energy consumed to accelerate a lift up to rated speed,

decelerate it from rated speed level at the destination landing, to open and close its doors and the idle

energy used while standing at the landings minus the energy which would have been used to travel at

rated speed during the distance of the acceleration and deceleration phases of the trip.

The start/stop energy consumption for each trip is given by Formula (2):
EE=−2××Es (2)
ssc rc rm rc
4 © ISO 2015 – All rights reserved
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SIST EN ISO 25745-2:2015
ISO 25745-2:2015(E)
5.2.5 Running energy of an average cycle with empty car

The running energy consumption of an average cycle for the target installation is given by Formula (3):

EE=×22×+sE× (3)
ravrmav ssc
where
E is the average running energy consumption per metre of travel (Wh/m);
s is the one-way average travel distance for target installation (m);
E is the start/stop energy consumption for each trip (Wh).
ssc

NOTE The running energy of the average cycle can be determined directly by measurement, calculation, or

simulation. In this case, the above evaluation is not required.

If the travel distance for a short cycle does not allow the rated speed to be reached, then running energy

consumption of an average cycle for the target installation is given by Formula (4):

EE=× (4)
ravrc
5.2.6 Daily running energy
The daily running energy consumption is given by Formula (5):
kn××E
Ld rav
E = (5)
where
E is the running energy consumption of an average cycle (Wh);
rav

n is the number of trips per day according to the selected usage category in Table 1;

k is the load factor;
E is the daily running energy consumption (Wh).

NOTE The average travel distance is that expected for the target installation. A cycle is two trip

...

SLOVENSKI STANDARD
SIST EN ISO 25745-2:2015
01-junij-2015

(QHUJHWVNDXþLQNRYLWRVWGYLJDO OLIWRY WHNRþLKVWRSQLFLQWHNRþLKVWH]GHO

(QHUJHWVNLL]UDþXQLQUD]YUVWLWHYOLIWRY ,62

Energy performance of lifts, escalators and moving walks - Part 2 : Energy calculation

and classification for lifts (elevators) (ISO 25745-2:2015)
Energieeffizienz von Aufzügen, Fahrtreppen und Fahrsteigen - Teil 2:
Energieberechnung und Klassifizierung von Aufzügen (ISO 25745-2:2015)

Performance énergétique des ascenseurs, escaliers mécaniques et trottoirs roulants -

Partie 2 : Calcul énergétique et classification des ascenseurs (élévateurs) (ISO 25745-

2:2015)
Ta slovenski standard je istoveten z: EN ISO 25745-2:2015
ICS:
91.140.90 'YLJDOD7HNRþHVWRSQLFH Lifts. Escalators
SIST EN ISO 25745-2:2015 en,de

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

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SIST EN ISO 25745-2:2015
---------------------- Page: 2 ----------------------
SIST EN ISO 25745-2:2015
EUROPEAN STANDARD
EN ISO 25745-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2015
ICS 91.140.90
English Version
Energy performance of lifts, escalators and moving walks - Part
2: Energy calculation and classification for lifts (elevators) (ISO
25745-2:2015)

Performance énergétique des ascenseurs, escaliers Energieeffizienz von Aufzügen, Fahrtreppen und

mécaniques et trottoirs roulants - Partie 2: Calcul Fahrsteigen - Teil 2: Energieberechnung und Klassifizierung

énergétique et classification des ascenseurs (ISO 25745- von Aufzügen (ISO 25745-2:2015)

2:2015)
This European Standard was approved by CEN on 22 November 2014.

CEN 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 CEN 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 CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same

status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

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

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United

Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 25745-2:2015 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 25745-2:2015
EN ISO 25745-2:2015 (E)
Contents Page

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

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SIST EN ISO 25745-2:2015
EN ISO 25745-2:2015 (E)
Foreword

This document (EN ISO 25745-2:2015) has been prepared by Technical Committee ISO/TC 178 “Lifts,

escalators and moving walks” in collaboration with Technical Committee CEN/TC 10 “Lifts, escalators and

moving walks” the secretariat of which is held by AFNOR.

This European Standard shall be given the status of a national standard, either by publication of an identical

text or by endorsement, at the latest by October 2015, and conflicting national standards shall be withdrawn at

the latest by October 2015.

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

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

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following

countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech

Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,

Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,

Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

Endorsement notice

The text of ISO 25745-2:2015 has been approved by CEN as EN ISO 25745-2:2015 without any modification.

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SIST EN ISO 25745-2:2015
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SIST EN ISO 25745-2:2015
INTERNATIONAL ISO
STANDARD 25745-2
First edition
2015-04-01
Energy performance of lifts, escalators
and moving walks —
Part 2:
Energy calculation and classification
for lifts (elevators)
Performance énergétique des ascenseurs, escaliers mécaniques et
trottoirs roulants —
Partie 2: Calcul énergétique et classification des ascenseurs
Reference number
ISO 25745-2:2015(E)
ISO 2015
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SIST EN ISO 25745-2:2015
ISO 25745-2:2015(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2015

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form

or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior

written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of

the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2015 – All rights reserved
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SIST EN ISO 25745-2:2015
ISO 25745-2:2015(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms, definitions ............................................................................................................................................................................................... 2

4 Data collection and analysis tools ...................................................................................................................................................... 2

5 Calculation of energy consumption .................................................................................................................................................. 3

5.1 Methodology ............................................................................................................................................................................................. 3

5.2 Calculation of running energy per day ............................................................................................................................... 3

5.2.1 Usage and number of starts per day ............................................................................................................... 3

5.2.2 Average travel distance .............................................................................................................................................. 4

5.2.3 Average running energy per metre .................................................................................................................. 4

5.2.4 Start/stop energy consumption ......................................................................................................................... 4

5.2.5 Running energy of an average cycle with empty car ........................................................................ 5

5.2.6 Daily running energy .................................................................................................................................................... 5

5.3 Calculation of non-running (idle/standby) energy consumption per day .......................................... 6

5.3.1 Running time per day .................................................................................................................................................. 6

5.3.2 Non-running time per day ....................................................................................................................................... 7

5.3.3 Time ratios of idle/standby modes .................................................................................................................. 7

5.3.4 Daily non-running (idle/standby) energy consumption ............................................................... 8

5.4 Total energy consumption per day ........................................................................................................................................ 8

5.5 Total energy consumption per year ...................................................................................................................................... 8

5.6 Method for determining the daily energy consumption for energy storage systems ................ 8

6 Lift energy efficiency classification ................................................................................................................................................... 9

6.1 Rationale....................................................................................................................................................................................................... 9

6.2 Performance level for running .................................................................................................................................................. 9

6.3 Performance levels for idle/standby.................................................................................................................................10

6.4 Classification of energy performance of the lift ......................................................................................................10

7 Specific running energy for the reference cycle ...............................................................................................................11

8 Reporting ...................................................................................................................................................................................................................11

Annex A (informative) Specific usage category ......................................................................................................................................13

Annex B (informative) Example calculation ..............................................................................................................................................14

Annex C (informative) Symbols ...............................................................................................................................................................................16

Bibliography .............................................................................................................................................................................................................................18

© ISO 2015 – All rights reserved iii
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SIST EN ISO 25745-2:2015
ISO 25745-2:2015(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).

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

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www.iso.org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the meaning of ISO specific terms and expressions related to conformity

assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers

to Trade (TBT) see the following URL: Foreword - Supplementary information

The committee responsible for this document is ISO/TC 178, Lifts, escalators and moving walks.

ISO 25745 consists of the following parts, under the general title Energy performance of lifts, escalators

and moving walks:
— Part 1: Energy measurement and verification
— Part 2: Energy calculation and classification for lifts (elevators)
— Part 3: Energy calculation and classification for escalators and moving walks
iv © ISO 2015 – All rights reserved
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SIST EN ISO 25745-2:2015
ISO 25745-2:2015(E)
Introduction

This International Standard has been prepared in response to the rapidly increasing need to ensure and

to support the efficient and effective use of energy. This International Standard provides

a) a method to estimate energy consumption on a daily and an annual basis for lifts, and

b) a method for energy classification of new, existing, or modernised lifts.

This International Standard is intended to be a reference for the following parties:

— building developers/owners to evaluate the energy consumption of various lifts;

— building owners and service companies when modernising installations including reduction of

energy consumption
— the installers and maintenance providers of lifts;
— consultants and architects involved in specification of lifts.
— inspectors and other third parties providing energy classification services.

The total energy consumption over the entire life cycle of lifts consists of the energy to manufacture,

install, operate, and the disposal of lifts. However, for the purpose of this International Standard, only

operating energy (running, idle, and standby) performance is considered.

In the preparation of this International Standard, Technical Committee ISO/TC 178, Subcommittee WG10

has initiated extensive research, which included over 4 500 simulations of typical lift installations. The

results of this research have been used to provide the numerical values shown in Tables 2 to 4.

This International Standard only considers traction, hydraulic and positive drive lifts, but can be used

as a reference for alternative technologies.

This International Standard can be used in relationship with national/regional jurisdictional energy

performance purposes.

It is assumed that whenever the energy performance of a lift is assessed to this International Standard,

all components of the lift have been designed in accordance with usual engineering practice and

calculation codes, are of sound mechanical and electrical construction, are made of materials with

adequate strength and of suitable quality, are free of defects, are kept in good repair and working order,

and have been selected and installed so that foreseeable environmental influences and special working

conditions have been considered.
© ISO 2015 – All rights reserved v
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SIST EN ISO 25745-2:2015
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SIST EN ISO 25745-2:2015
INTERNATIONAL STANDARD ISO 25745-2:2015(E)
Energy performance of lifts, escalators and moving walks —
Part 2:
Energy calculation and classification for lifts (elevators)
1 Scope
This part of ISO 25745 specifies the following:

a) a method to estimate energy consumption based on measured values, calculation, or simulation, on

an annual basis for traction, hydraulic, and positive drive lifts on a single unit basis;

b) energy classification system for new, existing, and modernized traction, hydraulic, and positive

drive lifts on a single unit basis;

This part of ISO 25745 applies to passenger and goods passenger lifts with rated speeds greater than 0,15 m/s

and only considers the energy performance during the operational portion of the life cycle of the lifts.

NOTE 1 For other types of lifts (e.g. service lifts, lifting platforms, etc.), this part of ISO 25745 can be taken

as a reference.

This part of ISO 25745 does not cover energy aspects, which affect the measurements, calculations, and

simulations, such as the following:
a) hoistway lighting;
b) heating and cooling equipment in the lift car;
c) machine room lighting;
d) machine room heating, ventilation, and air conditioning;
e) non-lift display systems, CCTV security cameras, etc.;
f) non-lift monitoring systems (e.g. building management systems, etc.);
g) effect of lift group dispatching on energy consumption;
h) environmental conditions;
i) consumption through the power sockets;
j) lifts whose travel includes an express zone.

NOTE 2 An express zone is unlikely to affect the average car load but can significantly affect the average

travel distance.
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.

ISO 25745-1, Energy performance of lifts, escalators and moving walks — Part 1: Energy measurement

and verification
© ISO 2015 – All rights reserved 1
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SIST EN ISO 25745-2:2015
ISO 25745-2:2015(E)
3 Terms, definitions

For the purposes of this document, the terms and definitions given in ISO 25745-1 and the following apply.

NOTE For symbols, see Annex C.
3.1
average cycle

cycle of one up and one down trip each covering the average travel distance of the target installation

including two complete door cycles
3.2
express zone

section of the lift well where there are no landing entrances whose length is more than three average

floor heights
3.3
load factor

ratio between the running energy used by a car carrying an average load and the running energy

with an empty car
Note 1 to entry: The average load that a car carries is given in Table 3.
3.4
short cycle

cycle during which the empty car is run for a travel distance of at least one-quarter of the total travel

height with the travel distance centred around the mid-point of the travel height and back to the starting

point over a sufficient distance for the lift car to reach stable rated speed in both directions including

two complete door cycles
3.5
trip(s)

movement(s) from a starting (departure) landing to the next stopping (arrival) landing not including

re-levelling
4 Data collection and analysis tools

The energy values (running energy, idle, 5 min standby, and 30 min standby power) used to estimate

annual energy consumption can be obtained using the energy measurement methodologies as specified

in ISO 25745-1 or by calculation or simulation.

Energy measurements can be taken during commissioning of a new lift or during the life of an existing

lift or on a test facility.
Running energy measurements can be achieved by

a) running the empty lift car between one terminal landing and the other terminal landing and then

back to the first terminal landing, including the energy used during the two door operations, in

accordance with the reference cycle as specified in ISO 25745-1, and

b) running the empty lift car from a defined landing to a predetermined point in the lift well and then

back to the defined landing (short cycle), including the energy used during the two door operations,

in accordance to the measurement procedures specified in ISO 25745-1.
Each cycle comprises two trips.

The running energy of the short cycle shall be determined with the travel centred on the mid-point

between the defined landing and the predetermined point, in order to reduce inaccuracies due the

influence of suspension means, travelling cables, etc. The travel of the short cycle shall be at least 1/4 of

the total travel height. However, the lift shall always reach rated speed during the cycle. For lifts with

two stops, no short running cycle evaluation is needed because the lift always runs the full travel height.

2 © ISO 2015 – All rights reserved
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SIST EN ISO 25745-2:2015
ISO 25745-2:2015(E)

Measurement b) allows a test facility to be arranged to match the terminal to terminal travel distance of

a target installation with a specified rated speed.

The determination of the 30 min standby power is only necessary if any lift energy consuming

components switch to a lower energy level after a time exceeding 5 min.

The standby power values shall be determined taking into account the manufacturer’s powering down

sequence times of the energy consuming components when the lift is in operation. The transition times

from standby modes shall be indicated in the documentation of the installation.

NOTE Some manufacturers can have a number of standby states depending on their powering down sequence

and recovery times.
5 Calculation of energy consumption
5.1 Methodology

This subclause specifies a methodology for the calculation of annual energy consumption.

This calculation methodology can be applied to new lifts and existing lifts and can only be applied to

single units. It can also be used to re-assess an installation after modernization.

This method applies whether the values are measured or are provided from a manufacturer’s model data.

In the case of groups of lift installations, each unit shall be considered as an individual unit. The energy

used by a shared component in a group shall be equally distributed between the individual units.

The following sections indicate the calculation process. An example calculation is shown in Annex B.

The methodology shown in 5.2 to 5.5 applies to lifts, which draw all power for normal running and non-

running operation, directly from the mains supply. For systems, which draw all or partial power from

energy storage systems during normal running or non-running operation, the method for calculating

the daily energy consumption is outlined in 5.6. Counterweights which store the energy of one lift run

are not considered as an energy storage system.

NOTE There might be a deviation between a calculated value and a measured value for a target installation. This

can be due to assumptions made. Where the difference is greater than 20 %, an investigation should be carried out.

5.2 Calculation of running energy per day
5.2.1 Usage and number of starts per day

The usage of an individual lift shall be categorized according to Table 1 by the estimated number of trips

per day. The approximate number of trips per day can be obtained from observations or a trip counter.

Where this data is not available, it can be estimated for the specific usage category according to Annex A.

Table 1 — Categorized number of trips per day
Usage category 1 2 3 4 5 6
Usage intensity/ Very low Low Medium High Very high Extremely
frequency high
Number of trips 50 125 300 750 1 500 2 500
per day (n )
(<75) (75 to <200) (200 to <500) (500 to <1 000) (1 000 to <2 000) (≥2 000)
(typical range)

NOTE The number of trips is categorized in order to achieve comparable results for energy assessments

carried out by different parties.
© ISO 2015 – All rights reserved 3
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SIST EN ISO 25745-2:2015
ISO 25745-2:2015(E)

For lift applications in which the traffic pattern and the number of starts per day are well known, e.g.

in existing buildings, a specific number of starts per day deviating from Table 1 can be agreed between

involved parties for the assessment of the annual energy consumption and classification of the lift. In

this case, the selected number of starts has to be documented as required in Clause 8.

5.2.2 Average travel distance

The average travel distance (s ) for the target installation shall be selected from Table 2 as percentage

of the one-way travel distance of the reference cycle according to ISO 25745-1.
Table 2 — Percentage of average travel distance
Usage category 1–3 4 5 6
Number of stopping floors Percentage average travel distance
2 100 %
3 67 %
> 3 49 % 44 % 39 % 32 %

NOTE For lift applications in which the traffic patterns are well known, a specific percentage of the average

travel distance can be agreed between the involved parties for the assessment of the annual energy consumption.

In this case, the selected percentage should be documented in Annex B.
5.2.3 Average running energy per metre

The average running energy consumption per metre of travel shall be determined when the lift is

running at rated speed.

The average running energy consumption per metre of travel is determined by Formula (1):

 
1 EE−
rc sc
E = (1)
 
2 ss−
rc sc
 
where

E is the running energy consumption of reference cycle according to ISO 25745-1 (Wh);

E is the running energy consumption of the short cycle (Wh);

s is the one-way travel distance of reference cycle according to ISO 25745-1 (m);

s is the one-way travel distance of the short cycle (m).

NOTE s and s are the one-way travel distances in each direction and need to be counted twice for the

rc sc
running distance of the complete cycle.
5.2.4 Start/stop energy consumption

The start/stop energy consumption includes the energy consumed to accelerate a lift up to rated speed,

decelerate it from rated speed level at the destination landing, to open and close its doors and the idle

energy used while standing at the landings minus the energy which would have been used to travel at

rated speed during the distance of the acceleration and deceleration phases of the trip.

The start/stop energy consumption for each trip is given by Formula (2):
EE=−2××Es (2)
ssc rc rm rc
4 © ISO 2015 – All rights reserved
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SIST EN ISO 25745-2:2015
ISO 25745-2:2015(E)
5.2.5 Running energy of an average cycle with empty car

The running energy consumption of an average cycle for the target installation is given by Formula (3):

EE=×22×+sE× (3)
ravrmav ssc
where
E is the average running energy consumption per metre of travel (Wh/m);
s is the one-way average travel distance for target installation (m);
E is the start/stop energy consumption for each trip (Wh).
ssc

NOTE The running energy of the average cycle can be determined directly by measurement, calculation, or

simulation. In this case, the above evaluation is not required.

If the travel distance for a short cycle does not allow the rated speed to be reached, then running energy

consumption of an average cycle for the target installation is given by Formula (4):

EE=× (4)
ravrc
5.2.6 Daily running energy
The daily running energy consumption is given by Formula (5):
kn××E
Ld rav
E = (5)
where
E is the running energy consumption of an average cycle (Wh);
rav

n is the number of trips per day according to the selected usage category in Table 1;

k is the load factor;
E is the daily running energy consumption (Wh).

NOTE The average travel distance is that expected for the target installation. A cycle is two trips accounting

for the division by 2 in the denominator.

The value for the load factor (k ) shall be calculated using Formulae (6) to (11) below, where the value

for percentage average car load (%Q) is taken from Table 3.
© ISO 2015 – All rights reserved 5
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SIST EN ISO 25745-2:2015
ISO 25745-2:2015(E)
For traction lifts counterbalanced to 50 %
kQ=−10()%,× 0164 (6)
For traction lifts counterb
...

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