Philips Lighting Indoor Furnishings TL5 Manual De Usuario
Current controlled preheating
Depending on the available time for preheating, the ballasts should
give a preheating current within the following limits:
give a preheating current within the following limits:
Voltage controlled preheating
Depending on the available time for preheating, the ballasts should
give a preheating voltage within the following limits:
give a preheating voltage within the following limits:
2000-11-07
4. Operation of ‘TL’5 lamps: Recommendations for ballast design
16
4.1
Starting characteristics
4.1.1 Starting conditions
Like all fluorescent lamps, ‘TL’5 lamps have electrodes with some
emissive material facilitating ignition, provided it is heated to a suffi-
ciently high temperature.
The best way of starting a ‘TL’5 lamp is to preheat the electrodes
to this high temperature prior to raising the open circuit voltage
to values that will cause an ignition.
The following information is intended to help electronic ballast
manufacturers in finding their way to design ballasts with maximum
performance. It is to be read in conjunction with IEC Publication
60929: “A.C. supplied electronic ballasts for tubular fluorescent
lamps. Performance requirements.”
emissive material facilitating ignition, provided it is heated to a suffi-
ciently high temperature.
The best way of starting a ‘TL’5 lamp is to preheat the electrodes
to this high temperature prior to raising the open circuit voltage
to values that will cause an ignition.
The following information is intended to help electronic ballast
manufacturers in finding their way to design ballasts with maximum
performance. It is to be read in conjunction with IEC Publication
60929: “A.C. supplied electronic ballasts for tubular fluorescent
lamps. Performance requirements.”
4.1.2 Electrode preheating
In this section information regarding the preheating process is
given.
However, some changes are to be expected in 2000.
Within IEC, the lighting industry is finalizing discussions
regarding standardization of preheating values of
‘TL’ lamps.
given.
However, some changes are to be expected in 2000.
Within IEC, the lighting industry is finalizing discussions
regarding standardization of preheating values of
‘TL’ lamps.
Two basic methods of providing preheated cathodes at lamp star-
ting are normally used, these being either:
1. cathode current controlled preheating
2. cathode voltage controlled preheating
ting are normally used, these being either:
1. cathode current controlled preheating
2. cathode voltage controlled preheating
Preheating circuits, which are not of the pure current controlled or
the pure voltage controlled type can be described by the energy
which should be supplied to the cathode:
Cathode energy controlled preheating
the pure voltage controlled type can be described by the energy
which should be supplied to the cathode:
Cathode energy controlled preheating
Preheating information is given by the energy requirement,
calculated by the formula:
E = Q + P x t, measured in a substitution resistor R
calculated by the formula:
E = Q + P x t, measured in a substitution resistor R
sub
.
This formula shows that the energy required, is the sum of
the energy supplied into the electrodes (heat content) and the
power lost (heat loss) by the electrodes during preheating
time.
the energy supplied into the electrodes (heat content) and the
power lost (heat loss) by the electrodes during preheating
time.
The following tables include minimum and maximum preheating
data for ‘TL’5 lamp electrodes at five different preheating times:
0,5 s, 1 s, 1,5 s, 2 s and 3 s.
Some preceding remarks:
1) preheating times < 0.4 s have to be discouraged
2) preheating currents at non-mentioned times can be calculated
data for ‘TL’5 lamp electrodes at five different preheating times:
0,5 s, 1 s, 1,5 s, 2 s and 3 s.
Some preceding remarks:
1) preheating times < 0.4 s have to be discouraged
2) preheating currents at non-mentioned times can be calculated
by the use of the energy formula
3) the values given are steady state values (constant during
preheating time)
4) frequent use of preheating outside the mentioned limits
will cause accelerated end-blackening and will have a negative
effect on lamp life.
effect on lamp life.
Lamp
Preheating
Preheating time
Substitution
type
current
resistor
mA
0,5 s 1,0 s 1,5 s 2,0 s 3,0 s
(R
sub
)
‘TL’5 HE min. (r.m.s.)
290
235
215
200 190
40
Ω
max. (r.m.s.)
400
350
300
250 250
40
Ω
‘TL’5 HO
24W
24W
min. (r.m.s.)
700
550
485
450 415
12
Ω
max. (r.m.s.) 1175 1000
825
650 650
12
Ω
39W
min. (r.m.s.)
700
550
485
450 415
12
Ω
max. (r.m.s.) 1175 1000
825
650 650
12
Ω
54W
min. (r.m.s.) 1090
860
770
720 665
8
Ω
max. (r.m.s.) 1370 1210 1055
900 900
8
Ω
4
9W
min. (r.m.s.)
490
370
320
295 265
16,5
Ω
max. (r.m.s.)
570
490
410
330 330
16,5
Ω
80W
min. (r.m.s)
1160
905
815
765 705
7
Ω
max. (r.m.s.) 1365 1210 1055
900 900
7
Ω
Lamp
Preheating
Preheating time
Substitution
type
voltage
resistor
V
0,5 s 1,0 s 1,5 s 2,0 s 3,0 s
(R
sub
)
‘TL’5 HE min. (r.m.s.)
9,1
7,4
6,7
6,3
5,9
31,0
Ω
max. (r.m.s.)
12,9
10,4
9,4
8,9
8,3
31,0
Ω
‘TL’5 HO
24W
24W
min. (r.m.s.)
5,7
4,5
4,1
3,8
3,6
8,2
Ω
max. (r.m.s.)
8,0
6,4
5,8
5,4
5,1
8,2
Ω
39W
min. (r.m.s.)
5,7
4,5
4,1
3,8
3,6
8,2
Ω
max. (r.m.s.)
8,0
6,4
5,8
5,4
5,1
8,2
Ω
54W
min. (r.m.s.)
5,9
4,6
4,0
3,7
3,4
5,1
Ω
max. (r.m.s.)
8,3
6,5
5,7
5,3
4,8
5,1
Ω
4
9W
min. (r.m.s.)
6,6
5,2
4,7
4,3
4,0
13,0
Ω
max. (r.m.s.)
9,4
7,4
6,6
6,1
5,7
13,0
Ω
80W
min. (r.m.s)
5,4
4,1
3,6
3,3
3,0
4,5
Ω
max. (r.m.s.)
7,6
5,8
5,1
4,7
4,2
4,5
Ω
Provisional data