Instruction manual

40
3.8.1 General Information
The functional earth in this arrangement restores the internal short circuit of
the system. Î no interaction of the capacitive currents of the system lamp-
ECG with the mains side and therefore no disturbances with regards to
CISPR 15 measurements.
Due to the partly high lamp voltages of T5 fluorescent lamps we
recommend to apply a functional earth to T5-lamps for improved radio
interference suppression.
3.8.2 Practical Details
Different Electronic Control Gear have to be connected to functional earth
for protection class II luminaires (potential equalisation): e.g.
QUICKTRONIC
®
INTELLIGENT QTi)
There is no coherence between the functional earth and the ground wire.
Thus the functional earth can be connected in luminaires of protection
class II.
Attention should be paid to:
1.) Luminaire
1.1) Construction
ECG housing and wire of functional earth have to be observed as
active parts.
- Requirement regarding double or boosted Insulation against metal
parts or the luminaire surface have to be kept.
- the wire for the functional earth connection must not be marked in
yellow/green
1.2) Terminal Labelling
Acc. to EN 60445/VDE0197 the functional earth connection has to be
marked with the letters „FE“ or the below label. See label in
Section
3.7.
In any case the symbol of the protective earth
must not be used for a
R
L N
R
L N
Plastics housing
Lamp
ECG
Lamp
ECG
Radio interference:
9 kHz to 300 MHz
Low