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Examples of system calculation
Example 1:
I need a 30-meter line of light of Fortimo LEDFlex S
1000lm/m 840 C5 G1 for a cove lighting application in
Germany with a IP67 transformer and 10-meter
extension cable.
1. Determine wattage of the LEDFlex S:
See datasheet or driver mapping table in the DIG
- >
7.8W/m
30x7.8= 234 Watt
2. Determine driver:
See driver mapping table and pick matching IP67
- >
transformer/driver
LED Transformer 300W IP67
24VDC 220-240V
3. Determine how many meters can be connected on
one driver.
See driver mapping table: LED Transformer 300W
IP67 24VDC 220-240V+10-meter extension cable
31.3 meter.
4. Check the Ta in the luminaire:
In this example Ta=30° C.
See table 1 for the maximum LEDFlex S length at Ta
- >
30
max. 10-meter LEDFlex S allowed to avoid
dimming due to voltage drop.
5. Check extension cable type
(min. 0.5 mm2 (AWG 20):
See datasheet of the LED Transformer 300W IP67
- >
24VDC 220-240V
2.5mm2 (AWG13)
6. Conclusion:
30 meter of Fortimo LEDFlex S 1000lm/m 840 C5
G1 can be connected on 1x LED Transformer 300W
IP67 24VDC 220-240V using a 3-string parallel
connection of the 10-meter LEDFlex S 1000lm/m
840 C5 G1.
26 - 25
Design-in Guide - LEDFlex S system
Example 2:
I need a 6-meter line of light of Fortimo LEDFlex S
1500lm/m 830 C5 G1 for an application in Italy with an
IP67 driver and 5-meter extension cable.
1. Determine wattage of the LEDFlex S:
See datasheet or driver mapping table in the DIG
- >
- >
12.8W/m
6x12.8=76.8 Watt
2. Determine driver:
See driver mapping table and pick matching IP67
transformer/driver
24VDC 220-240V.
3. Determine how many meters can be connected on
one driver:
See driver mapping table: LED Transformer 150W
IP67 24VDC 220-240V + 5-meter extension cable
- >
10.0 meter.
4. Check the Ta in the luminaire:
In this example Ta=50° C.
See table 1 for the maximum LEDFlex S length at Ta
- >
50
max. 7 -meter LEDFlex S allowed to avoid
dimming due to voltage drop.
5. Check extension cable type
(min. 0.5 mm2 (AWG 20):
See datasheet of the LED Transformer 300W IP67
24VDC 220-240V
6. Conclusion:
6 meter of Fortimo LEDFlex S 1500lm/m 830 C5 G1
can be connected in series on 1x LED Transformer
150W IP67 24VDC 220-240V.
- >
LED Transformer 150W IP67
- >
2.5mm2 (AWG13)
November 2021
- >
- >
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