Amp reading on led lights on a generator
- Thread starter domnic
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winnie
Senior Member
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- Springfield, MA, USA
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- Electric motor research
How large an installation? What is the expected draw?
My guess is that the impedance of the different sources changes the waveform of the current drawn by the LEDs, changing the current reported by the meter.
Also possible that the LEDs have a wide constant power range, and low generator voltage is causing high load current.
Jon
My guess is that the impedance of the different sources changes the waveform of the current drawn by the LEDs, changing the current reported by the meter.
Also possible that the LEDs have a wide constant power range, and low generator voltage is causing high load current.
Jon
DrSparks
The Everlasting Know-it-all!
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DrSparks
The Everlasting Know-it-all!
- Location
- Madison, WI, USA
- Occupation
- Master Electrician and General Contractor
Lower voltage would not increase current draw much. In fact it could lower it.
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winnie
Senior Member
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- Springfield, MA, USA
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- Electric motor research
For constant power loads, reducing voltage increases current.
Many (but not all) LED drivers act as constant power loads.
LED drivers are also often capable of operating over a very wide voltage range, such as 110-277V. In this case you might have an abnormal condition such as a 480V system but a generator configured to provide 208V. The system appears to be working because the LEDs compensate for the incorrect voltage, but the current goes way up.
Jon
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