ADB Stagelight EURODIM Twin Tech, Руководство по установке

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EURODIM TWIN TECH
User Manual - page 60
Issue 2.1 www.adbstagelight.com
13 Appendix D: Specification of Magnetic Circuit Breakers (MCB)
In this chapter we would like to discuss the dimension and types of MCB used for our
dimmers. For 3 kW circuits ADB uses 13 A and for 5 kW circuits 20 A rated MCB with C
Curve. Below we will explain why we use these values; it has been carefully designed in
our product, for your maximum safety and protection.
Now following the laws we have all learned:
By applying this formula and a Voltage of 230 V you will receive 2.990W
3
(13 A) and 4.600
W (20 A) maximum loads. At first sight this may be not sufficient – be reassured this has
been well thought of and is fully intentional as we will explain.
“C” curve type protection is used exclusively for lighting applications. Below you can see
the graph depicting the current passing through the MCB. If you look carefully to the curve,
you will notice that the MCB will hold the factor of minimum 1.13 (maximum 1.45) for an
infinite amount of time.
The 13A nominative MCB will hold min. 14.69A (or 3.38kW) and the 20A nominative MCB
will hold min. 22.6A (or 5.2kW) over an infinite amount of time.
ADB digital dimmers perform intelligent soft-
starts when flashing the circuit by the lighting
console to full. This clever programming
algorithm of our digital dimmers prevents the
MCB from tripping and helps you to save lamp
life by inflicting less stress on the lamp filament!
Attention:
But one must never plug in cold
tungsten halogen loads in a dimmer (or even an
undimmed circuit) at 100% Full. Large tungsten
filament lamps may appear as short-circuit to any
MCB exceeding by far the short-circuit current of
10x nominative value.
Result: the MCB will trip for sure!
Therefore always make sure that a dimmer circuit
is turned off, or at least at a very low value when
hard- plugging luminaires.
Additional Safety Features for extremely high short circuit values:
ADB exclusively features 63A HRC fuses protecting the modules against any internal
short- circuit and improving the ICC value of the cabinet to 50kA. This is an additional
safety feature may not be often found in competitor products.
3
All calculations are done with a supply current of nominative 230V in these examples.
P(Watt) = U(Volts) x I(Amperes)
ATTENTION: This formula may not be applied as simple as that because there is a
second factor to keep in mind and that is the curve of the selected line protection
device. There are many different curves MCB may have depending on the application
(Motors, General Household applications etc…)