Philips QL Induction Lighting Systems - Philips Lighting

2. Testing the electrical strength of the HF generator:
Connect all QL lamp systems inputs together and
connect (1000V + 2U out ) AC for 1 minute between
this point and ground (HF generator housing).
3. Testing between mains and neutral is not permitted,
as this might cause damage to the HF generator.
4. After the test has been completed, make sure that
the neutral is reconnected, since a disconnected
neutral will result in unpredictable mains voltage
(50V..400V), which may damage the HF generator.
L 1
3.4 Ambient luminaire temperatures and
optimum QL lamp system lifetime
The heat produced in the luminaire by the HF generator and
lamp must be conducted to the surroundings. When a
luminaire is physically isolated by the ceiling or by isolating
blankets (insulation), the produced heat cannot easily flow to
the surroundings. This will result in the HF generator inside
the luminaire being heated up, which in turn will have an
adverse effect on its life. For an optimum lifetime of the HF
generator it is important to remember that:
- Air should be able to flow freely around the
luminaire
- Air flow through the luminaire reduces the
temperature inside
V 3
230V
V 1
230V
V 2
230V
L 3 L 2
Figure 18: Normal situation in neutral connected
N
3.5 On/off switching
The QL lamp system is designed for general lighting
purposes (100,000 cycles). Exceeding this number of
switching cycles could result in a reduction of the HF
generator lifetime. In some applications (flashing, warning
light etc.), frequent on/off switching is needed. A switching
test with 85W 200-277V, 165W 200-277V and 165W 100-
120V generators has been stopped after 7.500.000 switches
without failures.
L 1
V 1=
X
N
V 3= V 2=
L 3 L 2
Figure 19: Situation when neutral is not connected (“loose
neutral”) and the load on all phases is not
symmetrical.
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