Упрощенная HTML-версия
9.112
Installation and operating instructions
1. Residual currents/circuit-breakers
Problem
For ECGs with protective earth (PE) both the high short-
duration in-rush current and the small leakage current
from the interference suppression capacitors in the ECGs
can trigger the residual current detector.
Solution
–
Distribute luminaires across 3 phases and use 3-phase
circuit-breakers
–
Use surge-current-resistant, short-delay circuit-breakers
–
If permissible, use 30 mA circuit-breakers
2. Capacity for automatic cutouts
With choke/starter switching, lamps ignite with staggered
intervals, with ECG switching all L lamps ignite simultane-
ously.
On switch-on at peak voltage, the storage capacitors of
electronic control gear cause a high but very brief current
pulse.
In this case, the simultaneous charging of these
capacitors in ECG operation can mean a higher system
switch-on current than with a choke/starter circuit.
This reduces the maximum number of luminaires
permitted per automatic cutout (see tables on the follow-
ing pages).
For example, the maximum number of luminaires permit-
ted on a 10 A automatic system reduces from 15 lumi-
naires with 2x58 W lamps with conventional control gear
in a twin circuit to 8 luminaires in an ECG circuit.
In the case of PTo the maximum permitted number of
luminaires on a 10 A cutout is reduced to 7 PTos, 50 W.
OSRAM offers an inrush current limiter EBN
for POWERTRONIC
®
devices and for selected
OPTOTRONIC® devices.
The EBN-OS restricts the switch-on current, which
means that a larger number of ECGs can be connected
to an automatic cutout (see table on page 9.115).
When using the values in the tables
note the following
–
In ECG operation the load data relates to switching on
at peak voltage
–
Circuit breaker type and characteristics:
The specified load from L lamps and the associated
control gear applies to circuit breakers of Type 5 SL and
5 SX with B characteristics.
If the above circuit breaker types with C characteris-
tics are used the number of permitted luminaires for
ECG operation can be increased by 70% (observe
VDE-0100-410)
–
Circuit breaker design:
The specified loading is for single-pole circuit breakers.
With use of multi-pole circuit breakers (2-pole, 3-pole)
the number of permitted luminaires is reduced by 20%.
–
Lamp switch-on:
The specified load applies:
–
to the common, grouped starting of the relevant
number of luminaires in “choke operation”
–
with ECG operation to the maximum permissible
number of luminaires switched together (with one
switching operation)
–
Circuit impedance:
The specified loading applies with reference to a line
impedance of 800 mΩ. (corresponding to a 15 m long
cable with a diameter of 1.5 mm
2
from the distribution
board to the first luminaire and a further distance of
20 m to the middle of the circuit; at a line impedance of
400 mΩ, the permitted values are reduced by 10%, and
by 20% with 200 mΩ)