SIST ISO 8528-12:2023

SLOVENSKI STANDARD
01-april-2023
Agregati za proizvodnjo izmeničnega toka, gnani z batnim motorjem z notranjim
zgorevanjem - 12. del: Zasilna preskrba z električno energijo za varnostne naprave
Reciprocating internal combustion engine driven alternating current generating sets -
Part 12: Emergency power supply to safety services
Groupes électrogènes à courant alternatif entraînés par moteurs alternatifs à combustion
interne - Partie 12: Alimentation électrique de secours de services de sécurité
Ta slovenski standard je istoveten z: ISO 8528-12:2022
ICS:
27.020 Motorji z notranjim Internal combustion engines
zgorevanjem
29.160.40 Električni agregati Generating sets
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

INTERNATIONAL ISO
STANDARD 8528-12
Second edition
2022-08
Reciprocating internal combustion
engine driven alternating current
generating sets —
Part 12:
Emergency power supply to safety
services
Groupes électrogènes à courant alternatif entraînés par moteurs
alternatifs à combustion interne —
Partie 12: Alimentation électrique de secours de services de sécurité
Reference number
© ISO 2022
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Published in Switzerland
ii
Contents Page
Foreword .iv
1 S c op e . 1
2 Nor m at i ve r ef er enc e s . 1
3 Terms and definitions . 2
4 Additional regulations and requirements . 2
5 Classification designation .2
5.1 G eneral . 2
5.2 T ypical examples of classification . 3
6 G enerating set design .3
6.1 C riteria for determining the required power . 3
6 . 2 Power de t er m i n at ion . 4
6.3 O perating limit values . 4
7 A dd it ion a l r e qu i r ement s .5
7.1 C haracteristics of batteries and battery charger for auxiliaries and starter . 5
7.2 C ompressed air starter . 6
7.3 F uel capacity . 6
7.4 Vent i l at ion lou ver s . 6
7.5 E lectric power supply . 6
7.6 R obustness against vibrations . 7
8 C ontrolgear and switchgear .7
8.1 General . 7
8.2 P rotection, measurement, monitoring and control equipment for the AC generator . 7
8.2.1 AC generator protection equipment . 7
8.2.2 A C generator measurement and monitoring equipment . 7
8.3 E ngine measurement and monitoring equipment . 7
8.4 G enerating set measurement and monitoring equipment . 7
8 . 5 R emot e s i g n a l s . 8
9 Te s t mo de . 8
9.1 T est operation with synchronization to the mains supply . 8
9.1.1 G eneral . 8
9.1.2 Gradual power application without switching . 8
9.1.3 Gradual power application with switching . 8
9.1.4 Sudden power application with short time parallel operation . 9
9.2 W ithout mains synchronization . 9
10 Te s t i n g. 9
10.1 G eneral . 9
10 . 2 I n s t a l l at ion t e s t s . 9
10 . 3 Per io d ic t e s t s . 10
11 R at i n g pl at e.10
12 R e qu i r e d do c u ment at ion .10
13 C heck l i s t .10
Bibliography .12
iii
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 of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 70, Internal combustion engines.
This second edition cancels and replaces the first edition (ISO 8528-12:1997), of which it constitutes a
minor revision. The changes are as follows:
— structure updated according to the current ISO template;
— normative references updated;
— previous Clause 4 deleted – the symbols used in ISO 8528-5 now apply;
— Clause 7 split into subclauses;
— hanging paragraphs removed from Clauses 8 and 9;
— values in Table 3 modified based on the values in ISO 8528-5:2022, Table 4;
— minor editorial changes.
A list of all parts in the ISO 8528 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
INTERNATIONAL STANDARD ISO 8528-12:2022(E)
Reciprocating internal combustion engine driven
alternating current generating sets —
Part 12:
Emergency power supply to safety services
1 S cope
This document applies to generating sets driven by reciprocating internal combustion (RIC) engines for
emergency power supply to safety services.
This document applies, for example, to safety equipment in hospitals, high-rise buildings and public
gathering places. It establishes the special requirements for the performance, design and maintenance
of generating sets used in these applications referred to previously and takes into account the provisions
1)
of ISO 8528-1 to ISO 8528-6 and ISO 8528-10 .
2 Normat ive references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
ISO 8528-1:2018, Reciprocating internal combustion engine driven alternating current generating sets —
Part 1: Application, ratings and performance
ISO 8528-2:2018, Reciprocating internal combustion engine driven alternating current generating sets —
Part 2: Engines
ISO 8528-3, Reciprocating internal combustion engine driven alternating current generating sets — Part
3: Alternating current generators for generating sets
ISO 8528-4:2005, Reciprocating internal combustion engine driven alternating current generating sets —
Part 4: Controlgear and switchgear
ISO 8528-5:2022, Reciprocating internal combustion engine driven alternating current generating sets —
Part 5: Generating sets
ISO 8528-6:2005, Reciprocating internal combustion engine driven alternating current generating sets —
Part 6: Test methods
IEC 60364-7-710, Low-voltage electrical installations — Part 7-710: Requirements for special installations
and locations — Medical locations
IEC 60622, Secondary cells and batteries containing alkaline or other non-acid electrolytes — Sealed
nickel-cadmium prismatic rechargeable single cells
IEC 60623, Secondary cells and batteries containing alkaline or other non-acid electrolytes — Vented
nickel-cadmium prismatic rechargeable single cells
IEC 60896-11, Stationary lead-acid batteries — Part 11: Vented types — General requirements and
methods of tests
IEC 60896-21, Stationary lead-acid batteries — Part 21: Valve regulated types — Methods of test
1) Under preparation. Stage at the time of publication: ISO/FDIS 8528-10:2022.
IEC 61951-1, Secondary cells and batteries containing alkaline or other non-acid electrolytes — Secondary
sealed cells and batteries for portable applications — Part 1: Nickel-Cadmium
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 8528-1 to ISO 8528-6 and the
following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
changeover time
time interval from the appearance of a malfunction of the normal electrical power supply system until
the safety services are again connected to the emergency power supply
Note 1 to entry: This connection to the safety services may be applied in several load steps.
3.2
bridging time
minimum time for which the generating station supplies the consumers with electrical power under
predetermined operating conditions
Note 1 to entry: The bridging time corresponds with the rated operating time as defined in IEC 60601-1.
3.3
safety services
equipment for the safety of persons which is installed and kept prepared in case of failure of the usual
electrical power supply system
3.4
consumer power demand
total of all intended demands of the connected consumers, taking into consideration the actual load
steps
3.5
power demand for safety services
required power demand to fulfil the safety service requirements
4 A dditional regulations and requirements
If special requirements or additional regulations are to be observed, they shall be stated by the
customer and agreed upon between manufacturer and customer.
5 Classification designation
5.1 General
Classification of generating sets for safety services is based on performance class G2 as defined in
ISO 8528-1 and the required changeover time, t , according to IEC 60364-5-56 and Table 1.
co
Table 1 — Classification by changeover time
Generating sets No break Short break Long break
Changeover time 0 < 0,5 s < 15 s > 15 s
Classification 1 2 3 4
5.2 Typical examples of classification
Typical examples of classification as defined in Table 1 are given in Table 2.
Table 2 — Examples
Classification Typical examples
The mains voltage drops below the rated voltage by more than 10 %.
After a changeover time of 0 s the power for the consumer power demand for safe-
ty services shall be available. The design of the no-break generating sets depends
on the required frequency and voltage deviations.
The mains voltage drops below the rated voltage by more than 10 %.
After a changeover time of 0,5 s the power for the consumer power demand for
safety services shall be available. The design of the short-break generation set
depends on the required frequency and voltage deviations.
The mains voltage drops below the rated voltage by more than 10 % for a period
longer than 0,5 s.
After a changeover time of maximum 15 s, power for 100 % of the consumer power
demand for safety services shall be available in steps.
The mains voltage drops below the rated voltage by more than 10 % for a period
longer than 0,5 s.
After a changeover time of maximum 15 s, power for 80 % of the consumer power
demand for safety services shall be available in two steps, and the power for 100 %
of the consumer demand shall be available after an additional 5 s has passed.
6 Gener ating set design
6.1 Crit eria for determining the required power
To ensure a reliable supply of electrical power by the generating set, the generating set manufacturer
shall be informed of the power requirements of the installations to be supplied.
The power requirements shall include short load peaks when switching in electrical installations (e.g.
lifts, pumps, fans, lighting equipment and nonlinear electrical installations). Where applicable, for
example for reasons of redundancy, the use of several generating sets operating in parallel will possibly
be required.
Since many modern RIC engines are turbocharged, it will be necessary to arrange load acceptance in
several steps.
For load acceptance, the definitions and values laid down in ISO 8528-5:2022, 8.4, Figure 5 and Figure 6
apply, where the load acceptance capability of the generating set is shown to be dependent on the brake
mean effective pressure of the RIC engine.
If larger steps are used than those recommended in ISO 8528-5:2022, Figure 5 and Figure 6, either
suitable additional measures shall be taken or the generating set power rating and, where applicable,
the rotating mass of the flywheel shall be increased.
The information provided by the checklist in Clause 13 is recommended for designing the generating
set.
Essential equipment of emergency generating sets, such as a cooling system, a fuel system including
storage tank and a lubrication system, shall be provided to ensure the operation of the generating set
for the required period.
The cooling system of the RIC engine shall be self-contained.
6.2 Power determinati o
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