EN 62253:2011

SLOVENSKI STANDARD
01-november-2011
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Photovoltaic pumping systems - Design qualification and performance measurements
Photovoltaische Pumpensysteme - Bauarteignug und Prüfung des Leistungsverhaltens
Système de pompage photovoltaïque - Qualification de la conception et mesures de
performance
Ta slovenski standard je istoveten z: EN 62253:2011
ICS:
27.160 6RQþQDHQHUJLMD Solar energy engineering
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 62253
NORME EUROPÉENNE
September 2011
EUROPÄISCHE NORM
ICS 27.160
English version
Photovoltaic pumping systems -
Design qualification and performance measurements
(IEC 62253:2011)
Systèmes de pompage photovoltaïques - Photovoltaische Pumpensysteme -
Qualification de la conception et mesures Bauarteignug und Prüfung des
de performance Leistungsverhaltens
(CEI 62253:2011) (IEC 62253:2011)

This European Standard was approved by CENELEC on 2011-08-19. 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 Central Secretariat 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 Central Secretariat 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 62253:2011 E
Foreword
The text of document 82/647/FDIS, future edition 1 of IEC 62253, prepared by IEC TC 82, "Solar
photovoltaic energy systems" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN 62253:2011.
The following dates are fixed:
(dop) 2012-05-19
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2014-08-19
• latest date by which the national
standards conflicting with the
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.
Endorsement notice
The text of the International Standard IEC 62253:2011 was approved by CENELEC as a European
Standard without any modification.

- 3 - EN 62253:2011
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

IEC 60068-2-6 - Environmental testing - EN 60068-2-6 -
Part 2-6: Tests - Test Fc: Vibration
(sinusoidal)
IEC 60068-2-30 - Environmental testing - EN 60068-2-30 -
Part 2-30: Tests - Test Db: Damp heat, cyclic
(12 h + 12 h cycle)
IEC 60146 Series Semiconductor converters - General EN 60146 Series
requirements and line commutated converters

IEC 60364-4-41 - Low-voltage electrical installations - HD 60364-4-41 -
Part 4-41: Protection for safety - Protection
against electric shock
IEC 60364-7-712 - Electrical installations of buildings - HD 60364-7-712 -
Part 7-712: Requirements for special
installations or locations - Solar photovoltaic
(PV) power supply systems
IEC 60529 - Degrees of protection provided by enclosures - -
(IP Code)
IEC 60947-1 - Low-voltage switchgear and controlgear - EN 60947-1 -
Part 1: General rules
IEC 61000-6-2 - Electromagnetic compatibility (EMC) - EN 61000-6-2 -
Part 6-2: Generic standards - Immunity for
industrial environments
IEC 61000-6-3 - Electromagnetic compatibility (EMC) - EN 61000-6-3 -
Part 6-3: Generic standards - Emission
standard for residential, commercial and light-
industrial environments
IEC 61215 - Crystalline silicon terrestrial photovoltaic (PV) EN 61215 -
modules - Design qualification and type
approval
IEC 61646 - Thin-film terrestrial photovoltaic (PV) EN 61646 -
modules - Design qualification and type
approval
IEC 61683 1999 Photovoltaic systems - Power conditioners - EN 61683 2000
Procedure for measuring efficiency

IEC 61725 - Analytical expression for daily solar profiles EN 61725 -

IEC 61730-1 (mod) - Photovoltaic (PV) module safety qualification - EN 61730-1 -
Part 1: Requirements for construction

IEC 61730-2 (mod) - Photovoltaic (PV) module safety qualification - EN 61730-2 -
Part 2: Requirements for construction

Publication Year Title EN/HD Year
IEC 61800-3 - Adjustable speed electrical power drive EN 61800-3 -
systems -
Part 3: EMC requirements and specific test
methods
IEC 62103 - Electronic equipment for use in power - -
installations
IEC 62109-1 - Safety of power converters for use in EN 62109-1 -
photovoltaic power systems -
Part 1: General requirements
IEC 62124 2004 Photovoltaic (PV) stand-alone systems - EN 62124 2005
Design verification
IEC 62305-3 - Protection against lightning - EN 62305-3 -
Part 3: Physical damage to structures and life
hazard
IEC 62458 - Sound system equipment - Electroacoustic EN 62458 -
transducers - Measurement of large signal
parameters
1) 1)
IEC 62548 201X Design requirements for photovoltaic (PV) EN 62548 201X
arrays
ISO 9905 1994 Technical specifications for centrifugal EN ISO 9905 1997
pumps - Class I
1)
To be published.
IEC 62253 ®
Edition 1.0 2011-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Photovoltaic pumping systems – Design qualification and performance
measurements
Systèmes de pompage photovoltaïques – Qualification de la conception et
mesures de performance
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX T
ICS 27.160 ISBN 978-2-88912-592-0

– 2 – 62253 © IEC:2011
CONTENTS
FOREWORD . 4
1 Scope and object . 6
2 Normative references. 6
3 Terms, definitions, system-types and -parameters . 7
3.1 Terms and definitions . 7
3.1.1 PV converter . 7
3.1.2 PV pump aggregate . 8
3.1.3 PV pump terminal cable . 8
3.1.4 PV pump systems . 8
3.1.5 Photovoltaic pumping systems in stand-alone operation . 8
3.1.6 Impedance matching . 8
3.2 System-types and -parameters . 8
4 Requirements for system components . 10
4.1 General . 10
4.2 Relations to other standards . 10
5 Performance measurement . 11
5.1 General . 11
5.2 Test set-up . 11
5.3 Pumping system performance tests . 13
5.3.1 General . 13
5.3.2 P-Q characterisation . 13
5.3.3 H-Q characterisation . 15
5.3.4 Start-up power measurements . 15
6 Design qualification for a pumping system . 16
6.1 General . 16
6.2 Customer data . 16
6.3 System characteristics . 17
6.4 Dimensioning of hydraulic equipment . 18
6.5 Documentation . 18
6.5.1 General . 18
6.5.2 Operating and maintenance handbook for the pump maintenance staff
at the PV pumping site . 18
6.5.3 Maintenance handbook covering operation, repair and servicing . 18
6.6 Design check of the PV pumping system in respect to the daily water volume . 19
6.7 Recording of the measured parameters . 19
Annex A (informative) Performance diagram, component characteristics and definitions . 21

Figure 1 – Schematic of system types for the purposes of testing (In case C, Vm and
Im may be electronically commutated voltage and current) . 9
Figure 2 – Example of PV pump test circuit in the lab . 13
Figure 3 – Example of a P-Q diagram . 14
Figure 4 – Example of an H-Q diagram for the same pump at different rotational speeds . 15
Figure A.1 – System performance for a centrifugal pumping system . 21

Table 1 – Categories of PV pumping systems for the purposes of testing . 8

62253 © IEC:2011 – 3 –
Table 2 – Definition of the parameters . 10
Table 3 – Pressure in bars for equivalent heads of water . 17
Table 4 – Core and optional parameters to be measured and recorded . 20

– 4 – 62253 © IEC:2011
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
PHOTOVOLTAIC PUMPING SYSTEMS –
DESIGN QUALIFICATION AND PERFORMANCE MEASUREMENTS

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62253 has been prepared by IEC technical committee 82: Solar
photovoltaic energy systems.
The text of this standard is based on the following documents:
FDIS Report on voting
82/647/FDIS 82/656/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

62253 © IEC:2011 – 5 –
The committee has decided that the contents of this publication will remain unchanged until the
stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data related to
the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.

– 6 – 62253 © IEC:2011
PHOTOVOLTAIC PUMPING SYSTEMS –
DESIGN QUALIFICATION AND PERFORMANCE MEASUREMENTS

1 Scope and object
This International Standard defines the requirements for design, qualification and performance
measurements of photovoltaic pumping systems in stand-alone operation. The outlined
measurements are applicable for either indoor tests with PV generator simulator or outdoor
tests using a real PV generator. This standard applies to systems with motor pump sets
connected to the PV generator directly or via a converter (DC to DC or DC to AC). It does not
apply to systems with electrical storage unless this storage is only used for the pump start up
(< 100 Wh).
The goal is to establish a PV pumping system design verification procedure according to the
specific environmental conditions. This Standard addresses the following pumping system
design features:
• Power vs. flow rate characteristics at constant pumping head
• Pumping head vs. flow rate characteristics at constant speed
• System design parameters and requirements
• System specification
• Documentation requirements
• System design verification procedure
The object of this standard is to establish requirements in order to be able to verify the system
performance characteristics of the PV pumping system. For this purpose the test set-up is
outlined, the measurements and deviations to be taken are defined and a checklist for the data
mining is established.
2 Normative references
The following referenced documents are indispensable for the application of this document. For
dated references, only the edition cited applies. For undated references, the latest edition of
the referenced document (including any amendments) applies.
IEC 60068-2-6, Environmental testing – Part 2-6: Tests – Test Fc: Vibration (sinusoidal)
IEC 60068-2-30, Environmental testing – Part 2:30: Tests – Test Db: Damp heat, cyclic (12 +
12 h cycle)
IEC 60146 (all parts), Semiconductor converters – General requirements and line commutated
converters
IEC 60364-4-41, Low-voltage electrical installations – Part 4-41: Protection for safety –
Protection against electric shock
IEC 60364-7-712, Electrical installations of buildings – Part 7-712: Requirements for special
installations or locations – Solar photovoltaic (PV) power supply systems
IEC 60529, Degree of protection provided by enclosures (IP Code)

62253 © IEC:2011 – 7 –
IEC 60947-1, Low voltage switchgear and controlgear – Part 1: General rules
IEC 61000-6-2, Electromagnetic compatibility (EMC) – Part 6-2: Generic standards – Immunity
for industrial environments
IEC 61000-6-3, Electromagnetic compatibility (EMC) – Part 6-3: Generic standards – Emission
standard for residential, commercial and light-industrial environments
IEC 61215, Crystalline silicon terrestrial photovoltaic (PV) modules – Design qualification and
type approval
IEC 61646, Thin-film terrestrial photovoltaic (PV) modules – Design qualification and type
approval
IEC 61683:1999, Photovoltaic systems – Power conditioners – Procedure for measuring
efficiency
IEC 61725, Analytical expression for daily solar profiles
IEC 61730-1, Photovoltaic (PV) module safety qualification – Part 1: Requirements for
construction
IEC 61730-2, Photovoltaic (PV) module safety qualification – Part 2: Requirements for testing
IEC 61800-3, Adjustable speed electrical power drive systems – Part 3: EMC requirements and
specific test methods
IEC 62103, Electronic equipment for use in power installations
IEC 62109-1, Safety of power converters for use in photovoltaic power systems – Part 1:
General requirements
IEC 62124:2004, Photovoltaic (PV) stand-alone systems design verification
IEC 62305-3, Protection against lightning – Part 3: Physical damage to structures and life
hazard
IEC 62458, Sound system equipment – Electroacoustical transducers – Measurement of large
signal parameters
IEC 62548 , Design requirements for photovoltaic (PV) arrays
ISO/DIS 9905, Technical specifications for centrifugal pumps – Class I (ISO 9905:1994)
3 Terms, definitions, system-types and -parameters
3.1 Terms and definitions
3.1.1 PV converter
The PV converter converts the DC voltage of the PV generator into a high or low DC voltage or
converts this DC voltage and/or DC current into one-phase or multi-phase alternating-current
voltage or alternating current
___________
To be published.
– 8 – 62253 © IEC:2011
NOTE the PV converter may also include equipment for MPPT, monitoring, metering and for protection purposes.
3.1.2 PV pump aggregate
The PV pump aggregate consists of the pump (centrifugal pump, displacement volume pump)
the driving motor and control
3.1.3 PV pump terminal cable
A PV pump terminal cable connects the PV converter and the pump aggregate
3.1.4 PV pump systems
A PV installation is comprised mainly of the following components and equipment:
PV generator, cabling, control unit (e.g. inverter, DC/DC converter, etc.), motor, pump and
hydraulic piping
3.1.5 Photovoltaic pumping systems in stand-alone operation
Photovoltaic pumping systems in stand-alone operation are photovoltaic pumping systems with
no connection to the grid
3.1.6 Impedance matching
DC/DC Converter, which may include MPPT or V/I tracking maybe with temperature correction
3.2 System-types and -parameters
For the purposes of testing, PV pumping systems can be divided into four categories as shown
in Table 1. The measurement access points within the system define these categories.
Figure 1 illustrates the four basic arrangements, and defines the parameters that can be
measured at each accessible point in the system. The parameters are defined in Table 2.
Table 1 – Categories of PV pumping systems for the purposes of testing
Pumping system types
A. DC systems either directly connected or with a control (impedance matching) electronics integral with
motor-pump
B. DC system with separate impedance matching unit, connected to either brushed or electronics
commutated motor-pump unit where the corresponding controls are integral with motor-pump
C. DC system (brushless) with separate commutation control (and impedance matching)
D. System with DC/AC inverter for operation of a standard AC pump-motor

62253 © IEC:2011 – 9 –
A.
Motor Pump
Array Control
p, Q
Va, Ia
n, T
B.
Impedance
Motor Pump
Control p, Q
Array
matching
Vm, Im
Va, Ia
n, T
Commutation
C.
p, Q
Motor  Pump
(and impedance
Array
matching)
Va, Ia Vm, Im
n, T
D.
p, Q
Motor Pump
Array Inverter
Va, Ia Vm, Im, f
n, T
IEC  1669/11
Figure 1 – Schematic of system types for the purposes of testing
(In case C, Vm and Im may be electronically commutated voltage and current)

– 10 – 62253 © IEC:2011
Table 2 – Definition of the parameters
No. Parameter Sym Unit
1 Generator voltage DC Va V
2 Generator current DC Ia A
3 Generator open circuit voltage DC Voc V
4 Generator short cut current DC Isc A
5 Generator maximum power point voltage DC Vmpp V
6 Generator maximum power point current DC Impp A
7 Pressure as measured Pa
p
8 Flow rate m /h
Q
9 Motor voltage DC or AC Vm V
10 Motor current DC or AC Im A
11 Motor voltage (multi-phase AC) V V
rms
12 Motor current (multi-phase AC) I A
rms
13 Power factor λ -
14 AC frequency (or DC switching frequency) Hz
f
–1
15 Motor speed min
n
16 Torque at motor-pump coupling T Nm
o
17 Water temperature (at inlet) t C

4 Requirements for system components
4.1 General
Typically a PV pumping system consists of the following main components:
• PV generator
• Electronic converters which are separate (impedance matching device or inverter)
• Combined motor pump unit
4.2 Relations to other standards
PV pumping systems are one of the applications for photovoltaics. Therefore existing
standards for the components shall be applied.
PV modules should comply with the requirements of relevant standards. For crystalline PV
modules IEC 61215, for thin-film PV modules IEC 61646 and for safety requirements for PV
modules IEC 61730-1 and IEC 61730-2 are applicable. PV generators should be installed
according to IEC 62548. The PV generator combiner box should bear a warning label indicating
that active parts of the PV generator combiner box may still be live even after disconnection
from the converter.
As PV pumping systems are stand-alone systems IEC 60364-7-712 applies as well.
The PV generator combiner boxes and the switchgear assembly for the installation of the PV
converter should be in compliance with the requirements of IEC 60947-1. A warning label is
required to the extent that fuses or disconnect devices should not be withdrawn or switched
under load if such devices are installed on the DC side.

62253 © IEC:2011 – 11 –
Power Conditioning Units (DC-DC converter, DC-AC converter) have to fulfil the requirements
given in IEC 62109-1.
Upon selection of the electrical equipment of the DC side one should ensure that the
equipment is suited for direct voltage and direct current. PV generators are to be connected in
series up to the maximum open-circuit voltage of th
...