OSRAM QUICKTRONIC INTELLIGENT DIM CFL - Manual (Page 17)

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2.4.4 Operation of multiple ECGs in a luminaire
If several dimmable ECGs are operated in a luminaire, there can be
interference effects and hence to flickering, jerky dimming or even to
shutdown of the ECGs if they have not been correctly installed. The
cause for this are inductions between the lamp current circuits of sev-
eral ECGs: If a lamp running at 100 % transfers just 1 % of its current
into the neighboring lamp dimmed to 1 %, this represents a fault of
100 %. The same applies to coupling between a heating current cir-
cuit, i.e. feed and return lines to one side of the lamp and the neigh-
boring lamp circuit.
There should, therefore, be a minimum spacing of 12 cm between the
lamp circuits (lamp and cables) of different ECGs. If this is not pos-
sible, the lamp wiring must be carefully installed
so coupling between
the lamp circuits is reduced to a minimum:
• Lay the lamp cables close to the appropriate lamps so that the
area covered by the lamp circuit is as small as possible. The lamp
circuits of the two ECGs must not overlap. This is particularly im-
portant for color control if adjacent ECGs are dimmed to different
levels.
• There should be a spacing of several centimeters between the
lamp cables of two ECGs
• The "short" (hot) lamp cables (see also ECG imprint) should lead to
one side of the lamp and should be as short as possible. The "long“
(cold) lamp cables to the other side of the lamp (see Table 2)
• Mains and control cables should not be laid close to the lamp ca-
bles (prevents undesired couplings into the control cable)
• All the mains and control cables may be routed together. To ensure
that radio interference suppression is not impaired, there should be
a gap of several centimeters to the lamp cables.