NORME
INTERNATIONALECEI
IEC
INTERNATIONAL
STANDARD61347-2-7
Première édition
First edition
2000-10
Appareillages de lampes –
Partie 2-7:
Prescriptions particulières pour les ballastsélectroniques alimentés en courant continu
pour l'éclairage de secours
Lamp controlgear –
Part 2-7:
Particular requirements for d.c. suppliedelectronic ballasts for emergency lighting
Num éro de r éférence
Reference number
CEI/IEC 61347-2-7:200061347-2-7 © IEC:2000 – 3 –
CONTENTS
Page
FOREWORD ....................................................................................................................... ... 7
INTRODUCTION .................................................................................................................. 1 1
Clause
1 Scope ......................................................................................................................... ... 13
2 Normative references..................................................................................................... 13
3 Definitions................................................................................................................... ... 15
4 General requirements .................................................................................................... 17
5 General notes on tests................................................................................................... 17
6 Classification ................................................................................................................ .1 7
7 Marking....................................................................................................................... ... 17
7.1 Mandatory marking ............................................................................................... 17
7.2 Information to be provided, if applicable................................................................ 19
8 Protection against accidental contact with live parts....................................................... 19
9 Terminals..................................................................................................................... .. 19
10 Provisions for earthing ................................................................................................... 19
11 Moisture resistance and insulation ................................................................................. 19
12 Electric strength............................................................................................................ .1 9
13 Thermal endurance test for windings.............................................................................. 19
14 Pulse voltages for ballasts for central battery systems ................................................... 21
15 Starting..................................................................................................................... ..... 21
15.1 Open-circuit voltage at terminations of lamp ......................................................... 21
15.2 Preheat conditions ................................................................................................ 23
15.2.1 Minimum voltage across lamp cathode...................................................... 2315.2.2 Maximum voltage across lamp cathode..................................................... 23
15.3 Switching capability .............................................................................................. 25
16 Lamp current and luminous flux ..................................................................................... 25
17 Supply current ............................................................................................................... 27
18 Maximum current in any lead (with cathode preheating) ................................................. 27
19 Lamp operating current waveforms ................................................................................ 27
20 Change-over operation .................................................................................................. 2721 Recharging device ......................................................................................................... 29
22 Protection against excessive discharge.......................................................................... 31
23 Indicator .................................................................................................................... .... 31
24 Remote control .............................................................................................................. 3 1
25 Temperature cycling test and endurance test ................................................................. 33
26 Polarity reversal............................................................................................................ .3 3
27 Fault conditions ............................................................................................................. 33
28 Construction ................................................................................................................. .3 3
29 Creepage distances and clearances............................................................................... 35
30 Screws, current-carrying parts and connections ............................................................. 35
31 Resistance to heat, fire and tracking .............................................................................. 35
32 Resistance to corrosion.................................................................................................. 3561347-2-7 © IEC:2000 – 5 –
Annexes........................................................................................................................ ....... 39
Figure 1 – Suitable circuits for the measurement of lamp current and luminous flux ............. 37
Table 1 – Pulse voltages ...................................................................................................... 21
Table 2 – Open-circuit voltage for high- and low-resistance cathode lamps
(with cathode preheating)..................................................................................................... 2 3
Table 3 – Discharge voltage................................................................................................. 2961347-2-7 © IEC:2000 – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
––––––––––––
LAMP CONTROLGEAR –
Part 2-7: Particular requirements for d.c. supplied electronic
ballasts for emergency lighting
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. Their preparation is
entrusted to technical committees; any IEC National Committee interested in the subject dealt with mayparticipate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. The IEC collaborates closely with the International
Organization for Standardization (ISO) in accordance with conditions determined by agreement between thetwo organizations.
2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has representationfrom all interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4)  In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Anydivergence between the IEC Standard and the corresponding national or regional standard shall be clearlyindicated in the latter.
5)  The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6)  Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61347-2-7 has been prepared by subcommittee 34C: Auxiliaries
for lamps, of IEC technical committee 34: Lamps and related equipment.
This first edition of IEC 61347-2-7, together with IEC 61347-1, cancels and replaces section
six of the first edition of IEC 60924, published in 1990, and constitutes a minor revision.
This standard shall be used in conjunction with IEC 61347-1. It was established on the basis
of the first edition (2000) of that standard.
This part 2 supplements or modifies the corresponding clauses in IEC 61347-1 so as to
convert that publication into the IEC standard: Particular requirements for d.c. supplied
electronic ballasts for public transport lighting
NOTE  In this standard, the following print types are used:
–Requirements proper: in roman type.
–Test specifications: in italic type .
– Explanatory matter: in smaller roman type .61347-2-7 © IEC:2000 – 9 –
The text of this standard is based on the following documents:
FDIS Report on voting
34C/504/FDIS 34C/518/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 3.
Annexes A to H form an integral part of this standard.
IEC 61347 consists of the following parts, under the general title Lamp controlgear:
–Part 1: General and safety requirements
–Part 2-1: Particular requirements for starting devices (other than glow starters )
–Part 2-2: Particular requirements for d.c. or a.c. supplied electronic step-down convertors
for filament lamps
–Part 2-3: Particular requirements for a.c. supplied electronic ballasts for fluorescent lamps
–Part 2-4: Particular requirements for d.c. electronic ballasts for general lighting
–Part 2-5: Particular requirements for d.c. supplied electronic ballasts for public transport
lighting
–Part 2-6: Particular requirements for d.c. supplied electronic ballasts for aircraft lighting
–Part 2-7: Particular requirements for d.c. supplied electronic ballasts for emer gency
lighting
–Part 2-8: Particular requirements for ballasts for fluorescent lamps
–Part 2-9: Particular requirements for ballasts for discharge lamps (excluding fluorescent
lamps)
–Part 2-10: Particular requirements for electronic invertors and convertors for high-
frequency operation of cold start tubular discharge lamps (neon tubes)
–Part 2-11: Particular requirements for miscellaneous electronic circuits used with
luminaires 1)
The committee has decided that the contents of this publication will remain unchanged until2003. At this date, the publication will be
reconfirmed;
withdrawn;
replaced by a revised edition, or
amended.
––––––––––
1) To be published.61347-2-7 © IEC:2000 – 11 –
INTRODUCTION
This first edition of IEC 61347-2-7, published in conjunction with IEC 61347-1, represents an
editorial review of section six of IEC 60924. The formatting into separately published parts
provides for ease of future amendments and revisions. Additional requirements will be added
as and when a need for them is recognized.
This standard, and the parts which make up IEC 61347-2, in referring to any of the clauses of
IEC 61347-1, specify the extent to which such a clause is applicable and the order in which
the tests are to be performed; they also include additional requirements, as necessary. Allparts which make up IEC 61347-2 are self-contained and, therefore, do not include references
to each other.
Where the requirements of any of the clauses of IEC 61347-1 are referred to in this standard
by the phrase “The requirements of clause n of IEC 61347-1 apply ”, this phrase is interpreted
as meaning that all requirements of the clause in question of part 1 apply, except any whichare clearly inapplicable to the specific type of lamp controlgear covered by this particular part
of IEC 61347-2.61347-2-7 © IEC:2000 – 13 –
LAMP CONTROLGEAR –
Part 2-7: Particular requirements for d.c. supplied electronic
ballasts for emergency lighting
1 Scope
This part of IEC 61347 specifies particular safety requirements for d.c. supplied electronic
ballasts for maintained and non-maintained emergency lighting purposes.
It includes specific requirements for ballasts and control units for luminaires for emergency
lighting as specified by IEC 60598-2-22.
DC supplied electronic ballasts for emergency lighting may or may not include batteries.
This standard also includes all operational requirements which, in the case of other d.c.
supplied electronic ballasts, are regarded as performance requirements. This is because non-
operational emergency lighting equipment presents a safety hazard.
Performance requirements are the subject of IEC 60925.
2 Normative references
For the purpose of this part of IEC 61347, the normative references given in clause 2 of
IEC 61347-1 which are mentioned in this standard apply, together with the following normative
references.
IEC 60598-2-22, Luminaires – Part 2-22: Particular requirements – Luminaires for emergency
lighting
IEC 60742, Isolating transformers and safety isolating transformers – Requirements
IEC 60925, D.C. supplied electronic ballasts for tubular fluorescent lamps – Performance
requirements
IEC 61347-1, Lamp controlgear – Part 1: General and safety requirements61347-2-7 © IEC:2000 – 15 –
3 Definitions
For the purpose of this part of IEC 61347, the definitions of clause 3 of IEC 61347-1 apply,
together with the following:
3.1
emergency lighting
lighting provided for use when the supply to the normal lighting fails; it includes escape
lighting and standby lighting
3.2
continual operation ballast
ballast for operating a lamp from the normal lighting supply with normal switching and also
from the emergency lighting supply when failure of the normal lighting supply occurs
3.3
intermittent operation ballast
ballast for operating a lamp from the emergency lighting supply only when failure of the
normal lighting supply occurs
3.4
control unit
unit or units comprising a supply changeover system, a battery charging device and, where
appropriate, means for testing. An invertor and lamp ballast can also be included in the unit
3.5
changeover operation
automatic connection of the lamp to the emergency lighting supply when failure of the normal
lighting supply occurs, and vice-versa
3.6
recharging device
device to maintain the battery charged and to recharge the battery within a specified time
3.7
protection device against extensive discharge
automatic device to disconnect the ballast from the battery when the battery voltage drops
below a certain value
3.8
rated duration of operation
duration of operation assigned by the manufacturer to control units or ballasts which include
batteries
3.9
rated battery voltage
voltage declared by the battery manufacturer
3.10
remote control
device to prevent discharge of the battery by the lamp operating circuit, when normal
illumination has been switched off centrally, e.g. during night time61347-2-7 © IEC:2000 – 17 –
3.11
indicator
device to indicate that the battery is being charged
3.12
ballast lumen factor
ratio of the light output of the lamp when the ballast under test is operated at its design
voltage, compared with the light output of the same lamp operated with the appropriatereference ballast supplied at its rated voltage and frequency
3.13
starting aid
conductive strip affixed to the outer surface of a lamp or a conductive plate which is placed at
an appropriate distance from a lamp
NOTE  A starting aid can only be effective when it has an adequate potential difference from one end of the lamp.
4 General requirements
The requirements of clause 4 of IEC 61347-1 apply.
5 General notes on tests
The requirements of clause 5 of IEC 61347-1 apply, together with the following additionalrequirement:
Number of specimens
The following number of specimens shall be submitted for testing:–one unit for the tests of clauses 6 to 12, 14 to 26 and 28 to 32;
–seven units for the tests of clause 13;
–one unit for the tests of clause 27 (additional units or components, where necessary, may
be required in consultation with the manufacturer).
6 Classification
The requirements of clause 6 of IEC 61347-1 are not applicable.
7 Marking
7.1 Mandatory marking
Ballasts shall be clearly and durably marked, in accordance with the requirements of 7.2 of
IEC 61347-1, with the following mandatory markings:
–items a), b), e), f), k) and l) of 7.1 of IEC 61347-1, together with
–open circuit voltage (for warning only, not to be tested);
–indication of type and current rating of the fuse, if applicable;
–mention of whether the ballast is suitable for use only on battery supply not having a
trickle or intermittent re-charging circuits; this information can also be made available in
the manufacturer's catalogue or similar;61347-2-7 © IEC:2000 – 19 –
–minimum and maximum rated voltage supply (d.c. supply) values shall be given either on
the ballast or made available in the manufacturer's catalogue or similar;
–clear indication of the association of the ballast, lamp and luminaire, including reference to
preferred battery types and rated duration of operation; these data may be given in themanufacturer's literature.
7.2 Information to be provided, if applicable
In addition to the above mandatory markings, the following information, if applicable, shall be
given either on the ballast, or be made available in the manufacturer ’s catalogue or similar:
–items h), i), j) and n) of 7.1 of IEC 61347-1, together with
–mention of whether the ballast is proof against supply voltage polarity reversal;
–design voltage;
–mention that the ballast is for emergency lighting use only;
–ballast lumen factor;
–rated output frequency (at the design voltage with and without lamp operating);
–limits of the ambient temperature range within which the ballast will start and operate the
lamp as intended at the declared rated voltage range.
8 Protection against accidental contact with live parts
The requirements of clause 10 of IEC 61347-1 apply.
9 Terminals
The requirements of clause 8 of IEC 61347-1 apply.
10 Provisions for earthing
The requirements of clause 9 of IEC 61347-1 apply.
11 Moisture resistance and insulation
The requirements of clause 11 of IEC 61347-1 apply, with the exception of the 7 M Ω
insulation resistance requirement for reinforced insulation.
12 Electric strength
The requirements of clause 12 of IEC 61347-1 apply.
13 Thermal endurance test for windings
The requirements of clause 13 of IEC 61347-1 are not applicable.61347-2-7 © IEC:2000 – 21 –
14 Pulse voltages for ballasts for central battery systems
The ballast shall withstand, without failure, any pulses caused by switching other equipment
on the same circuit.
Compliance is checked by operating the ballast at the maximum voltage of the rated voltage
range in association with the appropriate number of lamps and in an ambient temperature of
25 °C. The ballast shall withstand, without failure, the number of pulse voltages specified in
table 1 superimposed, with the same polarity, on the supply voltage.
Table 1 – Pulse voltages
Pulse voltage
Number of voltage
pulses Peak value
VPulse width at half peak
msPeriod between each
pulse
s
3 Equal to design voltage 10 2
NOTE  A suitable measuring circuit is shown in figure G.2 of IEC 61347-1.
15 Starting
The appropriate lamp(s) shall start in the rated voltage range and within the limits of the
temperature range.
Compliance is checked
–for continual operation ballasts by the tests of 15.1 and 15.2;
–for intermittent operation ballasts by the tests of 15.3.
15.1 Open-circuit voltage at terminations of lamp
A ballast, when operated at any voltage within its rated voltage range, shall provide an open-
circuit voltage at the lamp terminations such that
a) the minimum r.m.s. voltage across the lamp is at least that shown in column 3 of table 2;
b) the peak voltage across the lamp does not exceed that shown in columns 4 or 5 of table 2;c) the minimum peak voltage from one end of the lamp to the starting aid shall be at least
that shown in column 6 of table 2.
When the ballasts are designed to operate lamps in parallel circuits, the relevant
requirements shall be met for each separate lamp, independent of the number of lamps
inserted. Lamps operated with electronic ballasts complying with this standard shall employ a
starting aid as specified in IEC 60081 and IEC 60901, except in the case of lamps with a
diameter of 16 mm maximum, where the starting aid shall be positioned 7 mm from the lamp.
During these tests, each lamp cathode shall be replaced by a resistor having the same value
as the substitution resistor specified on the relevant lamp data sheet of IEC 60081 or
IEC 60901.
NOTE  The maximum values in table 2 are higher than those recommended in IEC 6 0081 and IEC 60901 because
of the greater voltage range of the supply voltage; this may lead to a decreased useful lamp life.61347-2-7 © IEC:2000 – 23 –
Table 2 – Open-circuit voltage for high- and low-resistance cathode lamps
(with cathode preheating)
Open-circuit voltage at lamp terminationsVoltage
between a
termination of
lamp and
starting aid
Maximum peak valueRated lamp
wattage
WNominal
dimensions
of the lamp
mmMinimum
r.m.s. voltage
VSymmetrical
invertor
VAsymmetrical
invertor
VMinimum peak
value
V
4
68
13
15T8
20
30T8
30T12
4065150 × 15
224 × 15
300 × 15
525 × 15
450 × 25
590 × 38
900 × 25
900 × 38
1 200 × 38
1 500 × 38100
100100200180
180
205200205
*550
550550550550
550
550550550
*700
700700700700
700
700700700
*290
290290290260
260
300290300
*
* Values under consideration.
15.2 Preheat conditions
The ballast shall provide correct cathode preheating.
Compliance is checked by the tests of 15.2.1 and 15.2.2
15.2.1 Minimum voltage across lamp cathodeWith a resistor of the objective value specified on the relevant lamp data sheet of IEC 60081
and IEC 60901, substituted for each lamp cathode and when operated at any voltage within
the rated voltage range, the ballast shall deliver a voltage at each resistor of at least3,05 V r.m.s. for low resistance cathode lamps and of at least 6,5 V r.m.s. for high resistance
cathode lamps.
15.2.2 Maximum voltage across lamp cathode
a) Ballasts for lamps with low resistance cathodes
With a resistor of the objective value specified on the relevant lamp data sheet of
IEC 60081 and IEC 60901 substituted for each lamp cathode and when operated at any
voltage within the rated voltage range, the ballast shall deliver a voltage at each resistor
not exceeding 6,5 V r.m.s.
b) Ballasts for lamps with high resistance cathodes
With a resistor of the objective value specified on the relevant lamp data sheet of
IEC 60081 and IEC 60901 substituted for each lamp cathode and when operated at anyvoltage within the rated voltage range, the ballast shall deliver a voltage at each resistor
not exceeding 11,0 V r.m.s. However, in those cases where this voltage exceeds
11,0 V r.m.s., a regulation check shall be made using a resistor of a value derived fromthe value of nominal running current shown on the lamp specified on the relevant lamp
data sheet of IEC 60081 and IEC 60901 and substituted in the following equation:61347-2-7 © IEC:2000 – 25 –
Ω×  
I  ,,=R
n12011
where
Inis the nominal running current of the lamp.
When the ballast is operated at any voltage within its rated voltage range, the current passed
by each resistor shall not exceed 2,1 times the nominal value In shown on the relevant lamp
data sheet of IEC 60081 and IEC 60901.
c) Ballasts for both high- or low-resistance cathode lamps
These ballasts shall comply with the requirements of item b).
15.3 Switching capability
The ballast/control unit shall be designed so that the appropriate lamp(s) achieve(s) sufficient
switchings.
Compliance is checked by the following test.
Three new lamps shall achieve 200 switchings when operated at the design voltage in a
cycle: 30 s "on", 120 s "off".
If one lamp does not achieve 200 switchings, a further three lamps shall be tested, each of
which shall achieve 200 switchings.
After this test, the ballast/control unit shall start and operate an appropriate new lamp within
1 s at the design voltage both at the lower limit and at the upper limit of the ambient
temperature range.
16 Lamp current and luminous flux
The ballast shall limit the arc current delivered to a reference lamp to a value not exceeding
125 % of that delivered to the same lamp when operated at its design voltage, and the
appropriate reference ballast shall be operated at its rated voltage and frequency.
Under the same conditions, the ratio of the luminous flux shall be not less than 95 % of the
declared ballast lumen factor.
NOTE  Any test circuit corresponding to that of figure 1 can be used to make the measurements.
Reference lamps shall be measured and selected as outlined in IEC 60921 and have thecharacteristics specified on the appropriate lamp data sheets in IEC 60081 and IEC 60901.
When measured in accordance with the requirements for reference ballasts given in
IEC 60921, reference ballasts shall have those characteristics specified both in IEC 60921
and on the appropriate lamp data sheet in IEC 60081.61347-2-7 © IEC:2000 – 27 –
17 Supply current
At the design voltage, the supply current shall not differ by more than ±15 % from the value
marked on the ballast when the ballast is operated with a reference lamp.
The supply shall be of low impedance and low inductance (applicable only to batteries remote
from the ballast).
For ballasts supplied from a central system, no r.m.s. a.c. current component of the d.c. input
current shall exceed 10 %, unless otherwise declared by the manufacturer. This is determined
by measuring the voltage across a non-inductive resistor in series with the input to the ballast.
The d.c. voltage drop across the resistor shall not exceed 2 % of the design voltage.
If a manufacturer declares that an a.c. component of the d.c. input current higher than 10 % is
permitted, the endurance test shall be carried out with an r.m.s. design voltage of the
waveform as declared.
18 Maximum current in any lead (with cathode preheating)
The current flowing in any one of the cathode terminations shall not exceed the value given inthe relevant lamp data sheets of IEC 60081 and IEC 60901.
Compliance is checked with an appropriate reference lamp in circuit and with the ballast in
normal operation and at a supply voltage equal to the maximum of the rated voltage range.
The procedure of IEC 60921, but with non-inductive resistors, shall be used.
19 Lamp operating current waveforms
Ballasts shall provide the correct waveform.
In the case of continual operation ballasts, the waveform of the current supplied in the steady
state to a reference lamp, associated with a ballast supplied at its design voltage, shall be
such that the peak current does not exceed 1,7 times the nominal lamp running current as
specified on the relevant lamp data sheet of IEC 60081 and IEC 60901.
Intermittent operation ballasts shall satisfy the above requirement for maximum peak current
or three times measured r.m.s. lamp current, whichever is the lower.
20 Change-over operation
The change-over from normal supply to emergency mode and back shall be in accordancewith 22.17 of IEC 60598-2-22.61347-2-7 © IEC:2000 – 29 –
21 Recharging device
The recharging device shall be appropriate to the battery system, and shall be capable of
recharging a battery within 24 h, so that the rated duration of operation of the lamp from the
ballast is achieved.
Compliance is checked by the tests of 21.1 and 21.2.
The recharging device shall be proof against short circuits that may occur due to battery
failure at the end of life, e.g. by the incorporation of non-inherently short-circuit proof
transformers.
Compliance is checked by the test of 21.3.
Transformers incorporated in recharging devices shall have input and output windings
separated by an insulation complying with the requirements of IEC 60742, that ensures no
possibility of connection between these windings.
The transformer secondary output(s) shall not exceed 50 V r.m.s. a.c. during operation with or
without the batteries connected.
Compliance is checked by the tests of 21.4 and 21.5.
21.1  The battery shall be charged for 48 h and then discharged until the voltage indicated in
table 3 is achieved.
Table 3 – Discharge voltage
Discharge condition/cell
V Battery type
Duration 1 h Duration 3 h
Nickel cadmium
Lead acid1,0
1,751,0
1,80
The values apply at an ambient temperature of 20 °C ± 5 °C and the preferred duration is that
specified in IEC 60598-2-22.
The recharging device shall then be operated to charge the fully discharged battery at 0,9
times the rated supply voltage and the minimum of the marked ambient temperature range, for
a period of 24 h.
Normal lighting supply failure shall then be simulated and the battery shall operate the lamp
from the ballast for the rated duration of operation.
21.2  The test of 21.1 is repeated at 0,9 times the rated supply voltage but at the maximum of
the marked ambient temperature range.
The battery shall operate the lamp from the ballast for the rated duration of operation and
shall not exceed its rated temperature at any time during the charge or discharge cycles.61347-2-7 © IEC:2000 – 31 –
21.3  The recharging device shall be operated at 1,1 times the rated supply voltage and the
maximum of the marked ambient temperature range with the batteries disconnected and
replaced by a short-circuit link. The test shall continue until stable conditions are achieved or
a protective device (e.g. fuse or thermal link) operates. The recharging device shall not create
a fire or electric shock hazard during the test period, and the ballast case shall not exceed its
rated maximum operating temperature.
On completion of the test period, the short-circuit link shall be removed, the battery
reconnected and fuse links replaced where necessary. The recharging device shall then
recharge the battery normally.
21.4  The adequate separation of input and output windings shall be checked by inspection
and by an electric strength test of (2 U + 1 000) V applied between input and output windings
after the humidity treatment of clause 11 of IEC 61347-1.
21.5  The output voltage of the recharging device transformer shall not exceed 50 V r.m.s.
a.c. when operated at 1,1 times the rated supply voltage with and without the batteries
connected.
22 Protection against excessive discharge
Lead acid batteries shall be protected against excessive discharge.
The current, still flowing after operation of the protection device against excessive discharge,
shall only discharge the battery to such an extent that the recharging according to clause 21
can be reached. The restoration of the protection device shall only be possible when the
normal supply voltage is reconnected.
Compliance is checked as follows.
The battery shall be discharged, as for intended use, to a value where the battery V/cell is
reduced to 70 % of the values given in table 3. The battery shall be recharged 240 h after
operation of the protection device. Then the battery shall meet the rated duration of operation
as specified by the manufacturer.
23 Indicator
If ballast/control units for emergency lighting luminaires have an indicator incorporated, it
shall indicate that the battery is being charged.
Compliance is checked by inspection and by operating the ballast/control unit.
24 Remote control
A remote control device shall operate only when normal lighting has been switched off
centrally. By switching on the normal lighting again, the emergency lighting shall be
automatically reset in the standby mode.
This device shall not interrupt the circuit between the lamp and the ballast/control unit.61347-2-7 © IEC:2000 – 33 –
A short-circuit, a contact to earth or an interruption in the connection between the remote
control device and the ballast/control unit shall not influence the normal functioning of the
emergency lighting.
Compliance is checked by inspection.
25 Temperature cycling test and endurance test
The ballast shall operate satisfactorily during service.
Compliance shall be checked by the following tests.
The ballast shall be mounted in accordance with the manufacturer's instructions (including
heat sinks, if specified), operated in association with appropriately rated lamp(s) at the
maximum voltage of the rated voltage range and subjected to a temperature cycling test and
an endurance test, as follows:
a) The temperature cycling test shall be carried out, starting at the lower limit of the ambient
temperature range for 1 h. The temperature shall then be raised to the upper limit of the
ambient temperature range and miantained there for 1 h. Five such temperature cycles
shall be carried out.
b) The endurance test shall be carried out at the ambient temperature which produces t c, for
the following test period:
–for continual operation ballasts: 500 h;
–for intermittent operation ballasts: 50 h.
At the end of this time, and after cooling to room temperature, the ballast shall restart and
operate the lamps at its design voltage.
26 Polarity reversal
When the ballast is declared to be proof against supply voltage polarity reversal, it shall be
operated with reverse voltage for 1 h, at the maximum voltage of the rated voltage range and
with appropriate lamp(s).
At the end of this period, the supply shall be connected correctly and the lamp(s) shall start
and operate normally.
27 Fault conditions
The requirements of clause 14 of IEC 61347-1 apply.
28 Construction
The requirements of clause 15 of IEC 61347-1 are not applicable. However, the followingrequirement does apply:
Emergency lighting shall not be provided by means of fluorescent lamps with built-in starters.61347-2-7 © IEC:2000 – 35 –
29 Creepage distances and clearances
The requirements of clause 16 of IEC 61347-1 apply.
30 Screws, current-carrying parts and connections
The requirements of clause 17 of IEC 61347-1 apply.
31 Resistance to heat, fire and tracking
The requirements of clause 18 of IEC 61347-1 apply, with the exception of requirements for
tracking.
32 Resistance to corrosion
The requirements of clause 19 of IEC 61347-1 are not applicable.61347-2-7 © IEC:2000 – 37 –
IEC   600/2000
Figure 1 – Suitable circuits for the measurement of lamp current and luminous flux61347-2-7 © IEC:2000 – 39 –
Annex A 
(normative)
Test to establish whether a conductive part is a live part
which may cause an electric shock
The requirements of annex A of IEC 61347-1 apply.
Annex B 
(normative)
Particular requirements for thermally protected lamp controlgear
The requirements of annex B of IEC 61347-1 are not applicable.
Annex C 
(normative)
Particular requirements for electronic lamp controlgear with means
of protection against overheating
The requirements of annex C of IEC 61347-1 are not applicable.
Annex D 
(normative)
Requirements for carrying out the heating tests of thermally
protected lamp controlgear
The requirements of annex D of IEC 61347-1 are not applicable.
Annex E 
(normative)
Use of constant S other than 4 500 in tw tests
The requirements of annex E of IEC 61347-1 are not applicable.61347-2-7 © IEC:2000 – 41 –
Annex F 
(normative)
Draught-proof enclosure
The requirements of annex F of IEC 61347-1 apply.
Annex G 
(normative)
Explanation of the derivation of the values of pulse voltages
The requirements of annex G of IEC 61347-1 apply.
Annex H 
(normative)
Tests
The requirements of annex H of IEC 61347-1 apply.
––––––––––––    ISBN 2-8318-5446-6
/G0D/G18/G26/G31/G2B/G27/G2C/G20/G1B/G3B/G38/G37/G37/G39/G38/G18
ICS  29.140.99
Typeset and printed by the IEC Central Office
GENEVA, SWITZERLAND