इंटरनेट
मानक
Disclosure to Promote the Right To Information
Whereas the Parliament of India has set out to provide a practical regime of right to
information for citizens to secure access to information under the control of public authorities,
in order to promote transparency and accountability in the working of every public authority,
and whereas the attached publication of the Bureau of Indian Standards is of particular interest
to the public, particularly disadvantaged communities and those engaged in the pursuit of
education and knowledge, the attached public safety standard is made available to promote the
timely dissemination of this information in an accurate manner to the public.
“जान1 का अ+धकार, जी1 का अ+धकार”
“प0रा1 को छोड न' 5 तरफ”
“The Right to Information, The Right to Live”
“Step Out From the Old to the New”
Mazdoor Kisan Shakti Sangathan
Jawaharlal Nehru
IS 9974-1 (1981): High pressure sodium vapour lamps, Part
1: General requirements and tests [ETD 23: Electric Lamps
and their Auxiliaries]
“!ान $ एक न' भारत का +नम-ण”
Satyanarayan Gangaram Pitroda
“Invent a New India Using Knowledge”
“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता ह”
है”
ह
Bhartṛhari—Nītiśatakam
“Knowledge is such a treasure which cannot be stolen”
IS : 9974 ( Part I ) - 1981
Indian Standard
SPECIFICATION
HIGH PRESSURE SODIUM
PART I GENERAL
( Reaffirmed 2002 )
FOR
VAPOUR
REQUIREMENTS
LAMPS
AND TESTS
( Second Reprint OCTOBER 1996 )
UDC 621.327.532
0 Copyright 1982
BUREAU
MANAK
Gr3
OF INDIAN
BHAVAN,
STANDARDS
9 BAHADUR
SHAH
NEW DELHI
110002
ZAFAR
MARG
January 1982
IS I 9974 ( Part I ) - 1981
Indian Standard
SPECIFICATION FOR
HIGH PRESSURE SODIUM VAPOUR LAMPS
PART I GENliRAL REQUIREMENTS AND TESTS
Electric Lamps and Accessories Sectional Committee, ETDC
lz%ahan
Smu
23
Repesenting
V. A. KRISHNAXURTRY
Central
Public Works Department,
New Delhi
Membrrs
SURVEYOROF WORKE ( ELEO )-I ( A~~ernaIe to
Shri V. A. Krishnamurthy
)
Bajaj Electricals
Ltd, Bombay
SEE1 G. K .hTHAL
S~nr R. K. KAFE ( Al!tmat~)
SHRI S. R. ANAND
Sylvania & Laxman Ltd, Nr.w D&i
SHRI C. W. PATWA~DHAN ( Alrarnare)
Directorate
General
SHBI R. S. AROBA
of
Supplies
Disposala,
New Delhi
SRRI S. KIUSHNA (Alternate )
SHBI G. BHATTACHARYA
National Test House, Calcutta
SRRI M. P. WALV~FKAR ( Aflernots )
SHRI N. S. CHAR1
Crompton Grcavea Ltd, Bombay
SHRI R. DAB GUPTA ( Aftertie )
SHRI P. K. CHATTERJEE
Electric Lamp Manufacturers
( India) Pvt Ltd,
Calcutta
SHRI M. M. BANDYOPADHYAY ( Ahnate )
Da S. N. DEIN~RA
The Miniature Bulb Industries
( India)
Pvt Ltd,
Dehra Dun
SERI V. S. CHEIBBAB ( Altemute )
DEPUTY GENERAL MANAGER
Ports Jr Telegraphs
Department,
Ministry
of
Communication,
Jabalpur
DIVISIONAL EN~~EEB ( Altmatr )
SHRI A. N. GHOSH
Development
Commissioner,
Small Scale Industries, New Delhi
CDR M. M. KAILA
Naval Headquartera,
Ministry of Defence
LT G. K. DHAWAN ( Alternab )
SHRI G. L. KESWANI
Directorate
General
of Technical
Department,
New Delhi
SHBI D. D. RAJDEV ( Alternate )
Q i&pjht
1982
BUREAU OF INDIAN STANDARDS
This publication
ir protected under the In&n C+yrigh, Act ( XIV of 1957 ) and
reproduction
in whole or in part by any meana except with written permission of the
publisher shall be deemed to be an infringement of copyright
under the said Act.
IS:9974(PartI)-1981
( Continued from page 1 )
Saar
Mmtbers
B. H. MHAT~E
Rqw.rcnting
Bombay Electric
Supply and Transport
taking, Bombay
Under-
SHI:I R. V. S. RAO (Alkmat~)
LT-Car. S. S. MOHANTY
Ministry of Defence ( DGI )
M~J V. B. DESIIMU~CH (Alternate )
SHI~I B. P. 0. PAX
Electric
Lamp and Component
Manufacturers’
Association of India, Bangalore
GP CAPT G. MUKHERJEE ( Ahmak)
SHM H. 0. P.aNDtSY
Directorate
of Technical
Development
& Production ( Air ), Ministry of Defence
SIIKI J. M. REWALLIWA~ ( Altcrnatc)
SHRI S. C R.4sroar
Hindustan Machine Tools Ltd, Bangalore
SHRX k. AUOIJSTINE ( Ai~ernale )
SHRI K. V. S. Rau
The Bengal Electric Lamp Works Ltd, Calcutta
SHICI N. B. RAY ( Altcrnafs )
SII~I N. 13.R.<Y
Indian Lamp Factories Association,
Calcutta
SHRI K. K. ROHATCI
Binsy Electricals & Appliances
Pvt Ltd, Calcutta
SlllU S. BIIATTACHARY.4 (Alternate )
Pradip Lamp Works, Patna
SHRI V. P. ROHATQI
SHIU
AJIT K. ROHATOI (Ahmafr)
Piece Electronics & Electricala Ltd. Bombay
SHI~I S. R~~YCHOUD~L~RY
SHIU M. AI.BRRT ( AItcrnate)
Natir;Li
Physical
Laboratory
( CSIR),
New
SHRI K. S. SAIWA
SHRI P. SHARAN GUPTA
S~r~cr S. C. KHER (Alternate)
Auto Limps
Ltd, Faridabad
Railway Board, Ministry of Railways
SHIU R. P. SRIV.\STAV.4
SIII<I S. B. MATHUR (Allenrule)
Directorate
General of Mines Safety.I. Dhanbad
SHlU v. c. VEllMA
SRRI B. K. SHARA N ( A/tern&c )
Director General, IS1 (Ex-ojicio Member)
SIC,31S. P. S:\CHDF.V,
Director
( Elec tech )
SCCdWy
SHRI SUKH BIR SINQE
Assistant
Panel for High
Pressu:e
Director
( Elec tech),
Sodium
Vapour
IS1
Lamps,
ETDC
23/P12
Convener
!?.HRIK. S.
National
Physical
Delhi
SARMA
Members
SERI P. K. CHATTERJEE
a
Electric Lamps
Laboratory
( CSIR ),
New
Manufacturers
( India ) Pvt Ltd,
Calcutta
SARI M. M. BAN DYOPADEYAY ( Altcrnats )
Genelec Ltd, Calcutta
SH~I J. R. PARI
SHRI S. K. NEOOI ( Akrrua~s )
Bengal Electric Lam Works Ltd, Salcbtta
SHRI K. V. S. R&o
Organization,
P Standards
Research
Design
SHRI R. P. SRIVA~TAVA
Lucknow
SHRI S. B. M~TEU~
( Alrrmak )
Piece Electronics & Electricals Ltd, Bombay
SHRI VIJAY KIRPAL
SHRI R. K. BAJPAI (Al&mate)
2
IS19974 (PartI)-
Indian Standard
SPECIFICATION FOR
HIGH PRESSURE SODIUM VAPOUR LAMPS
PART
I
GENERAL
REQUIREMENTS
AND
TESTS
0. FOREWORD
0.1 This Indian Standard ( Part I ) was adopted by the Indian Standards
Institution on 23 September 1981, after the draft finalized by the Electric
Lamps and Accessories Sectional (I’ommittee had been approved by the
Electrotechnical
Division Council.
0.2 This standard has been prepared to cover electrical characteristics
sodium vapour lamps.
for starting and operation of high pressure
Additional informatiop for purposes of design of ballasts, luminaires and
ignitors, where essential has also been incorporated.
It is hoped that at
a later stage it shall be possible to prepare a more detailed standard
which will state requirements necessary for safety together with test
conditions and procedures for complete testing of these lamps.
0.3 This standard consists of the following two parts:
Part I
Part II
General requirements
and tests; and
Standard lamp data sheets.
0.3.1 This standard
standard.
shall be read in conjunction
with
Part II of this
0.4 In the preparation of this standard assistance has been derived
from IEC Pub-662 (19801 High pressure sodium vapour lamps, issued by
the International Electrotechnical
Commission.
0.5 This life expectancy and nominal lumen output of high pressure
sodium vapour lamps are under consideration by the committee and
would be added at a later date as and when sufficient data are available.
However, for the purpose of guidance, the nominal life of such lamps
may be taken as 5 000 hours.
0.6 For the purpose of deciding whether a particular requirement of this
standard is complied with, the final value, observed or calculated,
3
IS:9974(PartI)-1981
expressing
the result of a test, shall be rounded off in accordance
with
The number of significant
places retained in the rounded
IS : 2-1960*.
off value should
be the same as that of the specified vnlue in this
standard.
1. SCOPE
1.1 This standard ( Part I ) specifies the electrical characteristics
for lamp
with or without
inrernal
starters operating
on 250 V together
with
information
for ballast, ignitors where essential, and luminaires for design
purposes in respect of high pressure sodium vnpour lamps.
2. TERMINOLOGY
2.0 For the purpose
2.1 Rated
of this standard,
Wattage
-
the following
The wattage
marked
definitions
on the lamps.
2.2 Calibration
Current - The value of the current
calibration
and control of the reference ballast are based.
2.3 Reference
use:
Ballast
a) in testing
-
A special
inductive
on
type ballast
standard
for testing ballasts;
ihe
designed
for
and
c) in the selection of reference lamps. It is essentially
by a stable voltage,current
ratio which is relatively
by variations in current, temperature and magnetic
Warm-up
Current - Lamp
after ignition of the lamp arc.
2.5 SON Lamps - Ovoid shaped
with diffusing powder coating.
high
current
2.7 SON-T Lamps - Tubular
shaped
lamps without any coating, that is, clear.
off numerical
high
( revised).
values
4
measured
pressure
shaped
high
2.6 SON-C
Lamps -Ovoid
lamps without any coating, that is, clear.
*Rules for rounding
which
lamps;
b) as a comparison
2.4 Lamp
15 seconds
shall apply:
sodium
pressure
pressure
characterized
uninfluenced
surroundings.
between
vapour
sodium
sodium
5 to
lamps
vapour
vapour
3. GENERAL
3.1 Lamps which comply with this standard when operated with a
ballast
and an ignitor shall start and operate satisfactorily
between
92 percent and 106 percent rated supply voltage and at temperatures
down to -40°C.
4. LAMP
DIMENSIONS
4.1 The lamp dimensions sh::ll comply with t.he requirements
the relevant lamp data sheet in Part II of this standard.
given
in
5. MARKING
5.1 The lamps shall be distinctly
information:
and indelibly
marked with the following
a) Mark of originThis may take the form of a trade-mark,
manufacturer’s
mark or the name of the responsible seller;
b) Rated
wattage;
c) Country
of manufacture;
d) Lamp
designation
e) Rated
voltage or voltage range.
6. LAMP
the
(for example,
SOS-T,
SON-C,
etc); and
CAPS
6.1 The dimensions
of the IX0 capson tllc firlish!:d lamp sh~li comply
with the requirements given in IS : 9900 (Part III)- 1981’~. The dimensions
of the caps shall be checked with the ‘Go’ and ‘So-Go’ gauges of lamp
caps as specified in IS : 9900 (Part IV)-1981 t.
6.2 The shells of the caps may be made of any stlitable material
the caps are ordinarily resistant to atmosp!lc;-ic: corrosion.
7. TEST
REQUIREMENTS
FOR LAMP STARTING,
AND ELECTRICAL
CHARACTERISTZCS
provided
WARM-UP
7.1 The
for the tests for lamp starting,
lamp
operating
conditions
;lre that the lamps should be
warm-up and electrical
characteristics
operated
in a horizontal
position in free air and at an ambient
temperature of 25 f 5”C, on ii 50 Hz sinusoid;11 power supply using the
specified reference ballitst.
*Specification
for high
lamp caps.
@pccificntion for
-gauges of lamp caps.
pressure
mwcury
mercury
v:lpt,~r I.uJI~>: I’art III Ditnensiona of
vapour
5
I;rmps: Part IV ‘Go’ xnd ‘No-Go’
IS:9974(PartI)-1991
7.2 Lamp Starting Test
7.21 Lam@ with External Star& - The pulse characteristics specified
on the relevant lamp data sheet are measured at the lamp holder
terminals with the normal circuit connected and the lamp removed from
the lamp holder. The wave shape of the pulse and the interpretation of
its principal parameters are illustrated in Fig. 1.
The peak value of the pulse height is measured
voltage level of the open circuit voltage (see Fig. 1).
0 VOLTAGE
from the zero
LEVEL
A = Pulse
-- height as specified on the lamp data sheet.
B = II 2 x the test voltage ( rms ) ( aa specified on the lamp data ahcct ).
C = A minus B.
D = 90 percent of A.
E 5- 30 percent of C.
‘I; = Rise time ( as specified in the lamp data sheet ).
I , = Duration time ( as specified in the lamp data sheet ).
FIG. I
WAVESHAPE OF VOLTAGE PULSE FOR LAMP STARTING TEST
Subsequent peaks of the same pulse shall not exceed
this value.
50 percent of
The circuit connections for lamp starting are to be such that the
pulse is applied to the lamp through the eyelet terminal of the cap and
with the shell substantially at earth potential.
7.2.2 Lamps witi Internal Starter -The
test volt
in the relevant lamp data sheet. The starting
6
hall be as indicated
measured from the
IS : 8874 ( Part I ) - 1981
inatant the internal. starter has opened
value in the relevant lamp data sheet.
shall not exceed
the maximum
NOTE - Reignition time lamps with internal iqnitl!r may take about 20 minutes
to reignite when switched on immediatelv after being switched off. Lamps with or
without
internal
starter when used wkh cxternn\ starter shall rs:rtrike within
5 seconds.
7.3 Lamp Worm-Up
Test
7.3.1 Lamps shall have been aged for a minimum
suitable production ballast and cooled for a minimum
to the test.
of 10 h using a
of one hour prior
7.3.2 The 5:oltage at the lamp terminals shall reach a minimum of 50 V
in a time not exceeding that specified on the rele\.ant lamp data sheet.
7.4 Lamp Electrical Characteristics teristics shall comply with the requirements
data sheet.
‘~IIc lamp electrical characgiven in the relevant lamp
7.4.1 Ageing -Before
the initial readings cre taken, tile lamp shall be
subjected
to ageing for 100 h. This operation may be carried out on R
production ballast.
8. INFORMATION
FOR BALLAST
AND IGNITOR
DESIGN
8.0 The following requirements
except for 8.5 shzll be nict o\.er the range
of 91! to 106 percent of the rated voltage of the* b:~!l;~st.
For 8.5, the range
ballast.
is 95 to 103 percent of the r:ited
8.1 Open Circuit Voltage -Minimum
198 v.
8.2 Starting
Pulse
vol~agc
;50
of the
Hz) shall
be
Characteristics
S.2.1 An ignitor shall
lamp starting
rms
voltage
start
lamps
which
comply
with the specified
test.
8.22 The pulse height shall comply with the requirernents
for ballast
design information
on the relevant lamp data shL_t, when tneasurcd at
the lampholder terminals with the normal circuit connected nnd :he lamp
removed from the lampholder.
account
shall
be taken of pulse
8.2.3 In designing
an ignitor,
attenuation due to the cable.
The ballast specification
shall require the
ignitor to be provided with information
concerning
thu maximum
value
IS:9974(PartI)-1981
of capacitance
lamp starting.
consistent with achieving the specified requirements
for,
0.2.4 Gemral Guidance
8.2.4.1 In general, the requirements in 8.2.1 will be met by a positive
pulse of 2.8 kV peak having a width of 1 IQ at 2.5 kV.
8.2.4.2 For satisfactory performance the pulse should occur within
the phase range 60-90 electrical degrees of the open-circuit voltage.
NOTE -
These values
are provisional
and are under consideration.
8.2.4.3 Where the pulse repetition rate is less than one per cycle, the
pulse width may have to be increased.
lamp warm-up current shall be
b3 Lamp Warm-Up
Current -The
measured within the range of 5 to 15 s after the ignition of the lamp arc,
and shall comply with the values specified on the relevant lamp data
sheet.
8.4 Current Crest Factor - The current crest factor shall not exceed
1.8 during lamp warm-up and operation.
The crest factor shall be
measured on a lamp having a voltage within f 5 V of the specified
nominal lamp voltage.
8.5 Lamp
Designers
Operating
Limits
for
the
Information
of
Ballast
Each of the data sheets given in Part II shows a diagram
of the lamp voltage and lamp wattage limits within which the lamp
The minimum. voltage limit (left-hand side of the
should be operated.
diagram) is the characteristic curve of a lamp whose voltage at rated
wattage is the minimum considered acceptable.
-
The maximum voltage limit (right-hand side of diagram) is the
characteristic curve having a voltage high enough to allow for a lamp
with:
a) maximum zero-hour voltage,
b) voltage rise during life, and
c) maximum voltage rise due to anclosure in a luminaire.
The wattage limit lines (top and bottom of the diagram) are chosen
with regard to the effect of lamp wattage on performance factors, such as
initial light output, lumen maintenance. lamp Iife, lamp warm-up, etc.
For a ballast to meet the lamp operating requirements, its
characteristic
curve, at any supply voltage between 95 .percent and
105 percent of rated voltage, must intersect each of the lamp voltage
8
---.--
IS : 9974 ( Part I ) - 1981
limit lines at points between the wattage limit lines and must remain
between the wattage limit lines throughout full range of lamp voltage. A
ballast characteristic is preferred such that the lamp wattage attains .a
maximum below the maximum lamp voltage limit and then decreases
as the lamp voltage increases beyond this point.
The lamp wattage obtained with a lamp of nominal voltage, when
measured on a ballast at rated voltage, shall not vary by more than
f 7.5 percent from that measured on the specified reference ballast.
Lamp operating limits and a typical ballast characteristic are given
as part of each lamp data sheet.
9. INFORMATION
FOR LUMINAIRE
DESIGN
NOTE - This information
refers to the luminaire
design checks
necessary
to
ensure that conditions
in the luminarie do not cause premature
failure of lamps
complying with this specification.
These checks do not constitute lamp requirements.
9.1 .Voltage Increase at Lamp Terminah - With a lamp operated
on a reference ballast at its rated voltage, the voltage at lamp terminals
shall not increase by more than the value specified on the relevant lamp
data sheet when the lamp is transferred from stabilised operation in free
al% to stabilised operation in the luminaire.
9.2 Lamp Envelope
Temperatures
-The
lamp envelope
ratures, when measured at any point, shall not exceed 400°C.
9.3 Permissible
Cap Temperatures
cap shall not exceed the following:
-
The temperature
tempeof
lamp
Cemented lamp cap.. . . . . . . .2 10°C maximum.
Mechanically fixed lamp cap... . . . . . .25O”C, maximum.
NOTE- The limitations in
are limitations
imposed by the
general, if the luminaire calues
that the voltage rise limitation
9.2 and 9.3 must be regarded with caution.
These
lamp materials,
but it must be understood
that in
a lamp to reach these temperatures,
it is probable
in 9.1 will be exceeded.
9
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Printedat Simca PrintingPress, Delhi, India
AMENOMENT NO. 1
APftIt 1986
TO
IS:9574(Part
1).1981
PART 1
SPECIFICATION FOR HIGH PRESSURE
SODIL! VAPOUR LAWS
ENERAL REQUIREtENTSAND TESTS
(Rzge 7, clause 7.2.2,
note) - Delete.
.
(GTDC 23)
&trd
at Slmco
Rlntinq Prere. Ddhl,
India
AMEtiMENTNO.
2
JANUARY1988
To
IS:9974(Part 11-1981 SPECIFICATION FOR
HIGH PRESSIJRESODIUM VAPODR LAMPS
PART1
GENEMLBEQU
IIWUINTSANDTESTS
(Page 5, clause 5.1) - Add the following in the
end:
'f) The rated lumen output.
Note - The manufacturer may declare a.higher
value of rated lumen output than the minimum
specified in the standard. Due to limitation
of space on lamps this information_ may,
however, be marked on the carton only.'
(ETDC 23)
PrInted at Simco Printing Prom* Delhi. India
AMENDMENT
NO. 3 DECEMBER 1988
TO
IS : 9974 ( Part 1 ) - 1981 SPECIFICATION
FOR HIGH
PRESSURE SODIUM VAPOUR
LAMPS
PART 1
GENERAL REQUIREMENTS
( Page 4, clause 2.7 ) ‘2.8
Test
Insert
the following
AND TESTS
new clauses after 2.7
Quantities
2.8.1 Inspection Test Quantity ( ZZ-Q) - The
for the purpose of determining
the acceptability
mechanical
and physical requirements.
,
number of lamps selected
of a batch as to marking,
- The number of lamps selected
2.8.2 Rating Test Qrlantity ( RTQ)
for the purpose of determining
the acceptability
of a batch as to initial
readings.
2.8.3 Life Test Quantity ( LTQ)
- The number
of lamps selected for
the purpose of determining
the acceptability
of a batch
as to life
performance.’
( Page 5, clause 4 ) ‘4. MECHANICAL
4.1 Lamp
requirements
standard.
Substitute
AND
Dimensions
-
given
the
in
the following
PHYSICAL
for the existing
clause:
REQUIREMENTS
The lamp dimensions shall comply with the
relevant lamp data sheet in Part 2 of this
4.2 Glass Bulb - Glass bulbs
detrimental
to service.
of the lamps
shall be free
from defects
4.3 Caps
4.3.1 The dimensions
of the E40 caps on the finished lamp shall
comply with the requirements
given in IS : 9900 ( Part 3 )-1981*.
The
dimensions
of the caps shall be checked
with the ‘GO’ and ‘No-Go’
gauges of lamp caps as spycified in IS : 9900 ( Part 4 )-1981t.
4.3.2 The shells of the caps may be made of any suitable
material
provided the caps are ordinarily
resistant to atmospheric
corrosion.
4.3.3 The cap shall be so constructed
that it withstands the torsion test specified
( Part I )-1981:.
and attached
to the bulb
in Appendix A of IS : 9900
4.3.4 Znsulation Resistance - The insulation
resistance between the shell
of the bayonet cap and the contact shall be not less than 50 megohms.
Measurement
shall be made one minute
after the application
of a dc
voltage of 500 V.
Prior to test, the external surface of the insulation of
the cap shall be wiped with a dry cloth. In case the insulation
resistance,
after first measurement,
is found to be insufficient,
the lamps shall be
stored in a warm, dry atmosphere
for a week and then retested
for
insulation.’
( Ptige 5, clause 5.1 ) ‘5.1.1 The lamps
Insert
the following
may also be marked
new clause
after 5.1:
with the Standard
Mark.
NOTE- The use of the Standard
Mark is governed by the provisions of the Bureau
of Indian Standards Act, 1986 and the Rules and Regulations
made thereunder.
The
Standard
Mark ‘on products covered
by an Indian Standard conveys the assurance
that they have been produced to comply with the requirements of that standard under
a well-defined system of inspection, testing and quality
control which is devised and
supervised
by BIS and operated
by the producer.
Standard marked products are
also continuouslv
checked
by BIS for conformitv
to that standard as a further
safeguard.
Details of conditions
under which a iicence for the use of Standard
Mark may be granted to manufacturers
or producrrs,
may be obtained from the
Bureau of Indian Standards ’
( Pup
5, clause 6 ) -
‘6. SELECTION
6.1 Method
Substitute
OF LAMPS
of Selection
specified in the following
manner such as to ensure
6.1.1 The selectidn
as follows:
the following
FOR
TESTS
for the existing
( SAMPLING
Claude:
)
- The inspection
and rating
test quantities
clauses shall be selected in a mutually
agreed
proper representation
of the batch.
of lamps
for
individual
batches
should
be made
a) Up lo atzn including 8 containers per batch - orrt of every container
an equal number
of lamps ( or a+ near to equal as possible )
shall be selected at random
i.n order to obtain
the
8 lamps
required.
h) Over 8 containers per batch - out of 8 containers, evenly distributed
over the whole batch, one lamp shall be selected at random from
each container
to obtain the 8 lamps required.
6.2 Inspection
Test Quantity
shall consist of 8 lamps.
( ITQ)
-
Inspection
6.3 Rating Test Quaatity
( RTQ) -G Rating
of 6 lamps, shall be selected at random
from
passed the inspection
tests.
test
quantity
test quantity
consisting
the lamps which have
6.4 Life Test Quantity ( LTQ ) - F ram the lamps which have passed
rating test, they shall be selected at random a L?‘<)_ of 4 lamps.
( Page 5, @t-notes
‘$Specilication
,tesrs.’
) -
Insert
fur high preswre
the folIoyin:
mercury
2
vapour
foot-note
lanlps:
in the end:
Part 1 Requirements
2nd
( Page 9, clause 9.3 ) -
‘10. REQUIREMENTS
PERFORMANCE
Add the following
AND
new clause after 9.3:
CONDITIONS
OF TEST
FOR LIFE
including
the ageing
period of 100
10.1 After 5 000 hours operation,
hours, the lumen maintenance
shall not be less than the value indicated
below:
a) For lamps up to and including
400 W
80 percent.
10.2 ‘The life test shall be carried out on an ac supply with a declared
frequency
of 50 Hz which shall be the rated frequency
of the ballast.
The test voltage shall be equal to the rated voltage
of the ballast f 1
percent.
commercial
For life testing,
differing by more than 3 percent
The life test shall be made
and 50°C.
ballasts
with electrical
parameters
not
from the reference ballast can be used.
at an ambient
The momentary
fluctuations
during the test shall not exceed f2
10.2.1 Switching ‘on’ and
test shah be switched
‘off’
period consisting
of $ hour
included
in calculating
the
far as possible, shall be done
11. CONDITIONS
of the
percent
temperature
between
test voltage and
in each case.
15°C
frequency
switching
‘of’ during l;fd test - Lamps on life
after every 74 hours of burning,
each ‘off’
duration.
The ‘off’ period shall not be
The life test, as
number
of burning hours.
continuously.
OF COMPLIANCE
- A batch shall be considered as conforming
11.1 General Conditions
to this standard
if the requirements
contained
in 11.2, 11.3 and 11.4 are
fulfilled.
If the batch fails to satisfy the requirements
of any of these
clauses, it shall be deemed not to comply with the standard.
II.2 Mechanical,
Physical
and Marking
Requirements
- A batch
shall be considered
to,comply with the requirements
of 4 and 5, if the
limits given below:
number of lamps failin g does not exceed qualifying
Qualifying
a) For any single
requirement
b) For all requirements
togcthcr
1
2
taken
3
Limit
11.3 Lamp Starting, Warm-up and Electrical
Characteristica
11.3.1 A batch shall be considered to comply with the requirementr of
lamp starting, warm-up and electrical characteristics
if the number of
lamps failing does not exceed the qualifying limits given below:
@al;fring Limit
1
a) For any single requirement
b) For all requirements
taken
together
2
11.4 Lumen Maintenmce - A batch shall be considered to comply
with the requirtments
of life if the total num&r
of lamps having lives
shorter than 5 000 hours, together with those failing to meet the requirements of lumen maintenance given in 10.1does not exceed the qualifying
limits given below:
Qualifittg
Lift Test @anti9
Limit
1
4
( ETDC 23 )
4
Printed at Slmco Prlnting Press, Delhi. India
AMENDMENT
NO. 4 MARCH 2007
TO
IS 9974 (PART 1) :1981 SPECIFICATION FOR HIGH
PRESSURE SODIUM VAPOUR LAMPS
PART 1 GENERAL REQUIREMENTS
AND TESTS
(Page 7, clause 7.4.1) — Insert the following new subclause
after 7.4.1:
‘7.4.2 Rated luminous flux of the lamps shall not be less than the value shown
on the relevant lamp data sheet of Part 2 of this standard. The initial luminous
flux of individual lamp shall not be less than ninetytwo percent of the rated
luminous flux.’
●
(ET 23)
Reprogmphy Unit, B[S, New Delhi, India
,
...