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Version 2019.1
Electrical Recommendations
12
MCB example
MCBS (MINIATURE CIRCUIT BREAKERS)
ICL (INRUSH CURRENT LIMITER)
An ICL can help avoid nuisance MCB tripping and can be installed between the MCB and the
load. It also enables an increase the luminaire quantity up to the maximum RMS current limit
of the Inrush Current Limiter.
ICL example
Valoya only recommend using MCB’s with “Type C” trip characteristics according to EN 60898.
MCB
TYPE
Rating
(A)
Relative
quantity
(%)
B
10
37
16
60
20
75
32
120
40
150
63
230
INRUSH CURRENT
This is the initial current surge drawn during product start-up. Total inrush current rises as the circuit load increases and is
one factor that can contribute to nuisance tripping of circuit breakers (MCB’s).
Practical performance will be affected by the MCB load, MCB tripping characteristics, site wiring impedance, and the
angle of the AC mainscycle at the specific moment power is applied.
Nuisance tripping issues may be improved by:
•
Reduc
ing the quantity of LED drivers connected to a single MCB.
•
Re-distributing the load over multiple mains phases.
•
Using an MCB with Type C (EN 60898) tripping characteristics.
•
Installing additional inrush current limiting devices.
•
Installing a zero crossing relay for powering up the LED drivers
.
The maximum quantity of Valoya products recommended for a 16A Type C MCB is stated on the product’s technical
specifications datasheet (e.g installation guide). This quantity is used as the 100% reference in the table below. The table is
provided as a tool to enable calculation of the approximate maximum load for different MCB types and ratings. Installation
wiring rating, impedances and mains switch-on angle variations may also influence the actual practical limit.
MCB
TYPE
Rating
(A)
Relative
quantity
(%)
C
10
62
16
100 (Ref.)
20
125
32
200
40
245
63
380
Example of a typical inrush current graph
