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Will flickering happen when the source and the light bulb are on different phases?

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eepty

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Will flickering happen when the source and light blub are on different phase?

I would like to ask if an electronics device which causes flickering is in phase 1, and a light bulb is in phase 2, will flickering be observed on the light bulb?

Thank you very much.
 

BradtheRad

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Re: Will flickering happen when the source and light blub are on different phase?

Do you refer to a phase detection circuit? It tells whether two clock signals are in or out of phase.
 

KlausST

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Re: Will flickering happen when the source and light blub are on different phase?

Hi,

Like so often - I say it depends.

when the electronics just cuase a current in one phase and this current causes a voltage drop in that phase, and the phases are with a star connected stable generator... then the electronics should not cause a flicker.

But there are situations that may cause flicker:
* power distribution transformers in a "Z" configuration. They make that a voltage drop in one phase cause a voltage drop in another phase, too.
* with small motor-generators a current in one phase may cause the whole voltage regulation system (excitation voltage of generator) to "ring" and thus the voltage of all phases may cause flicker.
* a voltage drop in the neutral line may cause voltage variation in all phases
...

Klaus
 

c_mitra

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Re: Will flickering happen when the source and light blub are on different phase?

Not in the first approximation.

Both in the same phase, yes. We need to consider the source impedance.

When they are in the different phases, the effect will be in the second order.

We need to consider impedance of the local 3-phase distribution transformer.
 

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