Стр. 452 - OSRAM_lamp_2014

Упрощенная HTML-версия

Installation and operating instructions
1. Residual currents/circuit-breakers
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.
Distribute luminaires across 3 phases and use 3-phase
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-
On switch-on at peak voltage, the storage capacitors of
electronic control gear cause a high but very brief current
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
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
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
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)