Technical information
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Fuse protection of HF-ballasts
Miniature Circuit Breakers
Miniature circuit breakers for groups of luminaires equipped with
an HF-ballast should be sized not only according to the rated current
but primarily with regard to the inrush current. The initial inrush cur-
rent that occurs when the luminaires are switched on can cause the
miniature circuit breaker to trip if this is sized incorrectly.
The inrush current is caused by the capacitors in the HF-ballast’s
mains lter. The size of the inrush current is not dependent on the
output of the HF-ballast’s but its design. The inrush current varies
from one HF-ballast manufacturer to another. Due to the character-
istics of the inrush current we recommended that miniature circuit
breakers with tripping characteristic C are used.
If there is a need to connect more HF-ballasts than that stated in
column 1 please contact our customer service for exact data.
As manufacturers continuously develop their products the data
on this page is not binding. For the latest data, please check with the
manufacturers of individual HF-ballast.
We reserve the right to make alterations and make reservations
for possible printer’s errors.
The number of HF-ballasts that can be connected to a circuit, pro-
tected with a 16 A miniature circuit breaker of type C, is shown in
the table below. We list two dierent values:
Column 1 – the value indicates the maximum number of HF-ballasts
that, independent of brand and type (Osram, Philips, Tridonic, Helvar)
which we use, can be connected to the miniature circuit breaker.
Column 2 – the value indicates the maximum number of HF-ballasts
that can be fuse protected for certain brands.
The value should be seen as an indication of what is possible.
Most brands and types of HF-ballast lie between the values stated in
column 1 and in column 2.
T5
Output HF-std HF-dim
Column 1
All
HF-ballasts
Column 2
Some
HF-ballasts
Column 1
All
HF-ballasts
Column 2
Some
HF-ballasts
1x14 47 122 47 150
2x14 28 47 20 78
3x14 44 47 38 38
4x14 42 47 26 42
1x21 47 86 47 120
2x21 28 47 20 60
1x24 44 103 47 150
2x24 20 53 38 52
1x28 47 86 26 83
2x28 28 47 20 48
1x35 47 86 38 76
2x35 28 47 18 33
1x39 44 61 47 76
2x39 20 32 20 31
1x49 44 56 38 48
2x49 20 26 18 26
1x54 38 47 25 76
2x54 20 26 20 30
1x80 20 30 20 38
2x80 16 20 15 20
T5 Eco
Output HF-std HF-dim
Column 1
All
HF-ballasts
Column 2
Some
HF-ballasts
Column 1
All
HF-ballasts
Column 2
Some
HF-ballasts
1x13 47 122 47 150
2x13 28 47 20 78
3x13 44 47 38 38
4x13 42 47 26 42
1x20 44 103 47 150
2x20 20 53 38 52
1x25 47 86 26 83
2x25 28 47 20 48
1x32 47 86 38 76
2x32 28 47 18 33
1x45 44 56 38 48
2x45 20 26 18 26
1x50 38 47 25 76
2x50 20 26 20 30
1x73 20 30 20 38
2x73 16 20 15 20
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