IEC 62035:1999/AMD2:2012

IEC 62035 ®
Edition 1.0 2012-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 2
AMENDEMENT 2
Discharge lamps (excluding fluorescent lamps) – Safety specifications

Lampes à décharge (à l'exclusion des lampes à fluorescence) – Prescriptions de
sécurité
IEC 62035:1999/A2:2012
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IEC 62035 ®
Edition 1.0 2012-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 2
AMENDEMENT 2
Discharge lamps (excluding fluorescent lamps) – Safety specifications

Lampes à décharge (à l'exclusion des lampes à fluorescence) – Prescriptions de

sécurité
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX K
ICS 29.140.30 ISBN 978-2-83220-296-8

– 2 – 62035 Amend. 2  IEC:2012
FOREWORD
This amendment has been prepared by subcommittee 34A: Lamps, of IEC technical
committee 34: Lamps and related equipment.
The text of this amendment is based on the following documents:
FDIS Report on voting
34A/1575/FDIS 34A/1599/RVD
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base 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• withdrawn,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.
_____________
5.2 Metal halide lamps
5.2.1.2 UV radiation
Add the following new paragraph:
For compliance testing, lamps of a family may be grouped if differences in design do not
contribute to differences in UV-visible spectral characteristics.
NOTE Examples of where design is likely to contribute to spectral differences are differences in arc tubes and
bulb glass. Examples of where design is not likely to contribute to spectral differences are differences in lamp caps
and beam angles of reflector lamps.
5.2.2.3 Containment
Replace the existing second paragraph by the following:
For test procedures and conditions of compliance, see Annexes I and J.
Table 1 – Grouping of test records – Sampling and acceptable quality levels (AQL)
In column 4, line 5.2.1.2, replace the existing text by the following:
By group, type or family
Add, after Annex H, the following new Annexes I and J:

62035 Amend. 2  IEC:2012 – 3 –
Annex I
(normative)
Containment testing procedure for metal halide lamps
with quartz arc tubes
I.1 General
I.1.1 Purpose
This method of measurement applies to metal halide lamps with quartz arc tubes, that are
designed to contain all particles within the outer bulb should an arc tube rupture occur. These
lamps are permitted to be used in open luminaires. This is not a sufficient procedure for
evaluation of particle containment designs which employ protective coatings, e.g. a plastic
coating over the outer bulb.
I.1.2 Test description
The test consists of discharging a capacitor through an operating lamp to simulate an end-of-
life arc tube rupture. In the first part of the test, the median energy required to ensure rupture
of the arc tube is determined. In the second part of the test, arc tubes are forced to rupture at
the median energy, and the lamps are examined for damage to the outer bulb. The test differs
from real end-of-life situations in a number of ways, including: a) the lamps are new, b) a high
energy input into the arc tubes is required to make them rupture, leading to higher pressures
and greater energies than typical end-of-life ruptures, and c) the arc tube rupture mechanism
may not be the same as that for end-of-life lamps.
I.2 Experimental setup
I.2.1 Safety precautions
High voltages and high electrical energy levels are involved in this test, so extreme caution is
required. Fragments of hot lamp parts can be ejected if the outer bulb is damaged, so a
physical enclosure is required. Precautions should be taken to contain and clean up mercury
and other hazardous materials from the lamp in the event of penetration of the outer bulb.
I.2.2 Electrical circuit
The basic electrical circuit used for containment testing of metal halide lamps is shown in
Figure I.1. The main components include: (1) a power supply for operating the lamp, (2) a
ballast for limiting current to the lamp, (9) a d.c. power supply for charging the discharge
capacitor, (5) a discharge capacitor for storing energy for the containment test, (8) a charging
resistor for charging the discharge capacitor, (6) a discharge resistor for discharging the
capacitor after the test, (3) a VAW meter for measuring the lamp electrical operating
characteristics and (7) a V meter for measuring the capacitor voltage. Specific details for
designing and operating such a circuit can be found in SR91 .
___________
Lamps, complying with the requirements of this annex are sometimes called “containment rated”, “open rated”
or “self-shielded”, the latter expression being preferred.
American National Standard Lighting Group Special Report #91: “Capacitive Discharge Tester – Design and
Operation Guide”.
– 4 – 62035 Amend. 2  IEC:2012

S7 S3 S4
S1
S5
1 4
5 9
S2
S6
IEC  1495/12
NOTE The switches are shown in open state. This does not correlate to a certain step in I.3.2.
Key
1 lamp power supply 6 discharge resistor
2 ballast or Hi-pot inductor 7 voltmeter
3 VAW meter 8 charging resistor
4 lamp 9 capacitor DC power supply
5 discharge capacitor S1…S7 switches
Figure I.1 – Basic electrical diagram for quartz metal
halide lamp containment test
Since circuit impedance can affect the test results, the lead wires between the discharge
capacitor and the lamp shall be less than 1 m long and have a cross sectional area of 20 mm
or larger, except in the last section, where a smaller diameter may be used to facilitate
connection to a lampholder.
The capacitor discharge d.c. power supply shall be capable of charging the discharge
capacitor to any voltage up to 5 000 V. The value of the charging resistor can be adjusted so
that the power supply can charge the capacitor within a reasonable amount of time.
The discharge capacitor may be adjusted to a value of 10 µF to 50 µF (higher values may be
required for lamps of higher power) and shall be capable of handling 5 000 V.
The lamp power supply shall be capable of supplying the lamp with sufficient voltage and
current to operate the lamp at its rated operating power. A timing circuit may be inserted into
the circuit so that the capacitor is discharged at the point in the electrical phase when the
current is at its maximum.
The operational ballast may comprise a suitable linear reactor or commercial ballast, with a
suitable impedance as specified in the applicable lamp standard. It shall be capable of
withstanding short-term high voltage pulses of 5 000 V.
The switches shall be capable of withstanding short-term high voltage pulses of 5 000 V in
their open condition.
The discharge resistor shall have a rating of at least 1 000 Ω and 25 W.

62035 Amend. 2  IEC:2012 – 5 –
I.2.3 Enclosure requirements
The enclosure for containment testing of metal halide lamps shall be constructed of materials
°
capable of withstanding the impact of hot particles (particles of up to 1,1 g at 1 200 C
travelling at 50 m/s). Suitable materials include sheet metal and impact-resistant, high-
temperature polymers. Metal enclosures shall be electrically grounded.
The enclosure shall be equipped with a suitable lamp holder for operating the lamp under test
in the base up position, or in the specified operating position of the lamp.
The dimensions of the enclosure are not critical, but they should be large enough to accept
the lamp under test and provide sufficient clearance at the sides and below the lamp.
I.3 Test procedures
I.3.1 Lamp selection and preparation
Lamps for this test shall be selected randomly from normal production or from pilot runs. The
lamp construction dimensions shall fall within the values of the lamp data sheets or the
manufacturer's specified values.
I.3.2 Determination of median rupture energy
In order to determine the median energy setting needed to rupture the arc tube within the
lamp, the following procedure shall be carried out, with reference to Figure I.1. Note that
these steps need to be carried out for each different lamp type.
1) Take care that the condition at the beginning is that the energy sources of charging and
lamp operation are not connected, lamp not inserted.
2) Select an initial energy value of at least 5 J by selecting the capacitor d.c. power supply
1/2
voltage according to U = (2 E / C) , where U is the capacitor voltage in volts (V), E is the
energy in joules (J), and C is the capacitor value in farads (F).
3) Open switches S1, S2, S3, S4; close switches S5, S6 and S7.
4) Insert a lamp into the test lampholder.
5) Turn on the lamp power supply and adjust to approximately the correct parameters to
operate the lamp. Use of this power supply may or may not require additional means of
starting.
6) Close the enclosure securely.
7) After 5 min, close switches S1 and S2, and open switch S6.
8) Determine the lamp electrical operating point by means of the VAW meter and adjust the
power supply as necessary to bring the lamp to its rated operating point.
9) Allow the lamp to operate for 20 min.
10) While waiting for the lamp to warm up, turn on the capacitor d.c. power supply, open
switch S5 and close switch S4 to begin charging the capacitor; monitor the capacitor
voltage by means of the voltmeter.
11) After the capacitor has reached its final charge and the lamp has operated at least
20 min, close switch S6 and open switches S1, S2 and S4.
12) Op
...