Osram HQI-E 150 W/NDL CL Technical Information Page 2
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2
1
I
ntr
oduc
t
io
n..
.
.................................................................................................................................................
4
2
H
ow a meta
l
h
a
lid
e
l
amp wor
ks
......................................................................................................................
5
2
.
1
Q
uartz discharge tub
e
.............................................................................................................................
6
2.2
C
eramic dischar
g
e tube
(
P
C
A = polycrystalline alumina
)
.........................................................................
6
2.2.
1
1st
g
eneration: cylindrical
f
or
m
.....................................................................................................
6
2.2.2 2nd
g
eneration: freely moldable ceramic, P
O
WERBALL
................................................................
6
3
Ballasts
f
or discharge lamp
s
..........................................................................................................................
8
3
.
1
Inductive ballasts
(
chokes
)
......................................................................................................................
8
3
.1.
1
A
m
e
ri
ca
n
c
ir
cu
it
s
fo
r
ba
ll
as
t
s
........................................................................................................
9
3
.
1
.
2
Variation in supply volta
g
e
f
or adapted inductanc
e
.....................................................................
10
3
.
1
.
3
In
f
luence o
f
deviations in supply voltag
e
.....................................................................................
11
3
.1.
4
C
a
p
acitor for
p
ower factor correctio
n
.........................................................................................
11
3
.
2
Electronic control
g
ear
(
E
CG)
................................................................................................................
12
3
.
2
.
1
S
tructure and functionin
g
of an electronic ballast
.
......................................................................
12
3
.
2
.
2
S
ervice life and tem
p
erature
.......................................................................................................
13
3
.2.
3
A
dvanta
g
es of operation with electronic ballast P
O
WERTR
O
NI
C
PTi
..........................................
1
3
3
.
3
In
f
luence o
f
harmonic waves and correspondin
g
f
ilter
s
.........................................................................
1
5
3
.
4
Brie
f
volta
g
e interruption
s
.....................................................................................................................
16
3
.
5
S
trobosco
p
ic effect and flicke
r
.............................................................................................................
17
4
Ig
n
i
t
i
n
g
an
d
start
i
n
g
di
sc
h
ar
g
e
l
amp
s
...........................................................................................................
1
9
4.1
E
xterna
l
ig
n
i
t
i
on un
i
t
s
...........................................................................................................................
1
9
4
.
1
.
1
P
ara
ll
e
l
ig
n
i
t
i
on un
it
....................................................................................................................
19
4
.
1
.
2
S
emi-parallel i
g
nition uni
t
...........................................................................................................
19
4.1.
3
S
uperimposed i
g
nitor
.................................................................................................................
2
0
4.2
W
arm re-
ig
n
i
t
i
o
n
...................................................................................................................................
2
0
4
.
3
H
ot re-
ig
n
i
t
i
o
n
.......................................................................................................................................
20
4.4 I
g
nition at low i
g
nition volta
g
e
(
Pennin
g
effect
)
.....................................................................................
2
0
4.
5
I
gn
i
t
i
on at
l
ow am
bi
ent temperature
s
....................................................................................................
2
0
4.
6
Cable ca
p
acitanc
e
................................................................................................................................
21
4
.
7
S
tart-up behavior of metal halide lamp
s
................................................................................................
21
5
Reducing the wattage o
f
high intensity discharge lamp
s
..............................................................................
23
5
.
1
I
ntr
oduc
t
ion
..........................................................................................................................................
2
3
5
.
2
W
atta
g
e re
d
uct
i
on tec
h
n
i
que
s
...............................................................................................................
2
3
5
.
2
.
1
R
e
d
uc
i
n
g
t
h
e supp
l
y vo
l
ta
ge
.......................................................................................................
23
5.
2
.
2
Ph
ase contro
l
:
l
ea
di
ng e
d
ge, tra
ili
ng e
d
g
e
..................................................................................
24
5
.2.
3
I
ncreas
i
n
g
c
h
o
k
e
i
mpe
d
ance or
d
ecreas
i
n
g
l
amp curren
t
............................................................
24
5
.2.4
C
han
g
e in frequency for hi
g
h-frequency mod
e
............................................................................
24
5
.
3
Recommendations
f
or reducin
g
the watta
g
e in dischar
g
e lamp
s
...........................................................
25
5.
3
.
1
M
eta
l
h
a
lid
e
l
am
ps
.....................................................................................................................
25
5.3.
2
Dimming
f
or other discharge lamp
s
............................................................................................
2
5
6
Lamp service life, a
g
in
g
and failure behavior
................................................................................................
2
6
6
.
1
Lamp service li
f
e and a
g
in
g
behavior
....................................................................................................
26
6
.
2
S
torage of metal halide lamps
...............................................................................................................
26
6.3 Failure mechanisms o
f
metal halide lam
p
s
............................................................................................
2
6
Co
ntent
s
- Outer bulb 5
- Hg = Mercury 5
- Me = Metals 5
- Hal = Halids 5
- Electrodes 5
- Daylight 6
- Neutral White 6
- Neutral White de luxe 6
- Warm White de luxe 6
- Voltage in V 8
- Current in A 8
- Lamp current I 10
- Luminaire 13
- HQI-T 150 W at OSRAM PTU 22
- HQI-T 150 W at CCG 22
- Re-ignition peak 28
- Luminous flux 45
- HQL-Standard 48
- HCI - NDL 48
- Typical lamp with 49
- HQI-T POWERSTAR 49
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